Service and Parts Manual

Transcription

1 -00 thru -00 Power Podiatry Examination Chair Service and Parts Manual Serial Number Prefixes: BN & V -00 thru -00 FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY SF-8 Part No (/0/)

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3 TABLE OF CONTENTS Section/Paragraph Page Section/Paragraph Page IMPORTANT INSTRUCTIONS General Safety Instructions... ii Warnings... ii Warranty Instructions... ii SECTION I GENERAL INFORMATION. Scope of Manual Description of Power Podiatry Examination Chair Specifications Parts Replacement Ordering Special Tools... - SECTION II TESTING AND TROUBLESHOOTING. Operational Test Troubleshooting Procedures... - SECTION III SCHEDULED MAINTENANCE. Scheduled Maintenance... - SECTION IV MAINTENANCE/SERVICE INSTRUCTIONS. Introduction Reinitialization Procedure Table Top Removal / Installation Shrouds Removal / Installation Control Disable Switch Removal / Installation Hand Control Plug-In Port Removal / Installation PC Control Board / Program PC Board Removal / Installation Actuator Motor / Actuator Brake Removal / Installation Tilt Actuator Assembly Removal / Installation Tilt Capacitor Removal / Installation Back Actuator Assembly Removal / Installation Back Capacitor Removal / Installation Arm Rest Adjustment Foot Extension Brake Lever Adjustment Hand Control Panel Or Interface Board Removal / Installation Plastic Foot Section Removal / Installation Plastic Back Section Removal / Installation Plastic Seat Section Removal / Installation Foot Extension Removal / Installation... - SECTION V SCHEMATICS AND DIAGRAMS. Electrical Schematics / Wiring Diagrams Audible Signal Guide Chart... - SECTION VI PARTS LIST. Introduction Description of Columns... - Pictorial Index... - Upholstery Set (Standard)... -.* Back Section Components... -.* Seat Section Components... - Actuator Assembly... -.* Foot Section Components... - Upper Chair Electrical Components * Fixed Base Assembly... -9* Hand Control Accessory COMMENTS... - FAX ORDERING FORM... - (*) Indicates that there has been a serial number break for the illustration and that there are additional point page(s) following the original page. Page i Midmark 99 SF-8 Rev. /0 Printed in U.S.A.

4 IMPORTANT INSTRUCTIONS General Safety Instructions Safety First: The primary concern of Midmark Corporation is that this examination chair is maintained with the safety of the patient and staff in mind. To assure that services and repairs are completed safely and correctly, proceed as follows: () Read this entire manual before performing any services or repairs on this chair. () Be sure you understand the instructions contained in this manual before attempting to service or repair this chair. Warnings Throughout this manual are Note, Caution, and Danger paragraphs that call attention to particular procedures. These items are used as follows: Warranty Instructions Refer to the Midmark Limited Warranty printed on the back cover of the Installation and Operation Manual for warranty information. Failure to follow the guidelines listed below will void the warranty and/or render the Power Podiatry Examination Chair unsafe for operation. In the event of a malfunction, do not attempt to operate the chair until necessary repairs have been made. Do not attempt to disassemble chair, replace malfunctioning or damaged components, or perform adjustments unless you are one of Midmark s authorized service technicians. Do not substitute parts of another manufacturer when replacing inoperative or damaged components. Use only Midmark replacement parts. NOTE A note is used to amplify an operating procedure, practice or condition.! CAUTION A CAUTION is used for an operating procedure, practice, or condition which, if not correctly followed, could result in equipment damage.! DANGER A DANGER is used for an operating procedure, practice, or condition which, if not correctly followed, could result in loss of life or serious personal injury. Midmark 99 SF-8 Page ii Printed in U.S.A.

5 SECTION I GENERAL INFORMATION SECTION I GENERAL INFORMATION. Scope of Manual This manual contains detailed troubleshooting, scheduled maintenance, maintenance, and service instructions for Power Podiatry Examination Chair. This manual is intended to be used by Midmark s authorized service technicians.. Description Of Power Podiatry Examination Chair A. General Description The Power Podiatry Examination Chair is an examination chair designed specifically for performing general podiatric examinations and minor podiatric procedures (Podiatry - treatment of foot ailments). B. Major Serviceable Components (See Figure -). The major serviceable components of the chair are the arm casting linkage assembly, back actuator capacitor, back actuator assembly, tilt actuator capacitor, tilt actuator assembly, foot extension brake assembly, PC control board, PC program board (a new style PC control board is now being used which combines the PC control board and PC program board together into one board), 0. amp fuse & 0 amp fuse for old style PC control board or 0. amp & amp fuse for new style PC control board, control disable switch, hand control which includes hand control panel and hand control interface board. C. Theory of Operation (See Figures - thru - for electrical schematic / wiring diagram) VAC is supplied directly to the PC control board and to the two electrical outlets. Power: Line voltage is supplied to the the fuses on the PC board. The old style board has one () each 0 amp and 0. amp fuse. The newer style board has four () amp and one () 0. amp fuses. This current is applied to one side of the Normally Open contacts of the Actuator relays on the PC board. There are two relays per actuator assembly; one for each direction. There are two relays on the PC control board for a foot actuator assembly and two relays for a base actuator assembly, which are not used by the model. VAC is also applied across the 0. amp fuse or 0. amp fuse, depending on version of PC board to the transformer. The transformer and some associated circuitry reduce the VAC to a + VDC output and + VDC output. Both voltages are used to power circuitry on the PC control board and PC program board. The newer PC board, has a green "BOARD FAIL L.E.D.". If the L.E.D. is flashing, normal operation is being indicated. If the L.E.D. is not flashing, the PC control board is malfunctioning. Loss of power or blown fuses can also cause the green L.E.D. to not flash. Actuators: On older units (before SN BN0) both Back and Tilt actuators contain a pivot point on the end of the ball screw. If an actuator is run to the end of its stroke (mechanical home position), the ball screw shaft spins inside the nut, allowing the actuator to run without damaging or advancing the nut. On present units (after SN BN0) both the Back and Tilt actuators have limit switches to prevent overextending or retracting the actuator. Should the actuator reach the maximum extended or minimum retracted travel the specific limit switch contacts will Open, removing power from the actuator motor. This prevents the actuator from over-extending or over-retracting. All the actuator motors have a normally closed, thermal overload switch which will open if the actuator assembly is run continuously and overheats. The actuator motor was not designed for continuous operation. The normal cool off period for the thermal overload switches is 0-0 minutes. Normal Operation: Pressing a function key on the hand control sends a signal to the PC control board. The PC control board energizes the relay, closing the Normally Open contacts of the selected function. Current is now applied to the actuator assembly motor causing the actuator assembly to run. There is a diagnostic L.E.D. in each relay circuit. When a relay coil is energized, the related L.E.D. illuminates, indicating that there is power at the relay's coil and the PC control board is working properly. Midmark 99 SF-8 Rev./0 Page - Printed in U.S.A.

6 POSI TIO POSI TIO POSI TIO RETUR POSI TIO POSI TIO F O UP TI T UP BAC UP TABL UP DOW BACK DOW TABLE DOW SECTION I GENERAL INFORMATION PC CONTROL BOARD OLD STYLE () FUSE (0. Amp.) () FUSE (0 Amp.) NEW STYLE PC PROGRAM BOARD PC CONTROL BOARD () FUSE (0. Amp.) BACK ACTUATOR CAPACITOR () FUSE ( Amp.) BACK ACTUATOR ASSEMBLY ARM CASTING LINKAGE ASSEMBLY TILT ACTUATOR ASSEMBLY TILT ACTUATOR CAPACITOR CONTROL DISABLE SWITCH FOOT EXTENSION BRAKE ASSEMBLY LIMIT SWITCHES (NEWER UNITS) HAND CONTROL PANEL MIDMARK HAND CONTROL AUTO S O FOOT DOW TILT HAND CONTROL INTERFACE BOARD MA0i Figure -. Major Components Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

7 SECTION I GENERAL INFORMATION When the PC control board receives a function signal from a hand control, the microprocessor on the PC control board does several things; It monitors the current draw of the running actuator assembly motor (this is important because different patient loads affect the amount of current drawn by the motor as well as its speed - meaning monitoring current draw can let the PC control board calculate an actuator assembly's speed). The PC control board also keeps track of how long an actuator assembly's relay has been energized (how long actuator assembly motor has been running). By comparing the current draw of the running actuator motor and the time period that an actuator assembly's relay has been energized, against an on-board data base, the PC control board can determine how far, in its range of motion, an actuator assembly has traveled. The PC control board records this positional information in its memory. The PC control board continuously calculates an actuator assembly's position and stores that information in memory for future use. If the current draw of an actuator assembly exceeds a predetermined level for more than 0. seconds, the PC control board shuts down the actuator assembly, until the button is released and depressed again. When an operator selects a function, the PC control board calculates the maximum run time that it will take the actuator assembly to reach the end of its travel range. If the operator holds down the function button longer than the maximum run time, the PC control board will de-energize the relay of the actuator assembly when the maximum run time is reached, causing the actuator assembly motor to stop running. This prevents excessive wear on an actuator assembly due to a switch sticking or an operator continuously holding down a function switch. When a function (this is true for only for a few of the functions) is reselected, after its actuator assembly has been stopped by the PC control board because it reached its maximum run time, the PC control board will allow the actuator assembly to run for seconds before de-energizing its relay. This allows the mechanical "home" position of the actuator assembly to be synchronized with the PC control board's software "home" position. Programmed Positions: The operator positions the chair into a position he/she would like to store into memory. When the PROGRAM button is pressed and held for 0. seconds for old style PC control board or second for new style PC control board, the PC control board is in program mode and is ready to store a position into memory. Then, when one of the four program position buttons ("", "", "", or "") on the hand control is pressed, the position of the chair is stored into the PC control board's memory. The operator has five seconds in which to select a programmed position button. After five seconds, the PC control board cancels the program mode. Also, if any buttons other than the program position buttons "", "", "", or "" are pressed, the program mode is canceled. The PC control board stores the chair's position which has been calculated and stored in the PC control boards memory as described in the "normal operation" of a function. When an operator presses a programmed position button, the PC control board determines which functions need to move and energizes the relays for the actuator assemblies of those functions. The PC control board uses the method described in "normal operation" to determine when an actuator assembly of a function has reached its programmed position. When an actuator assembly of a function reaches its position, its relay is de-energized. This continues until all actuator assemblies of affected functions have reached their position. If the operator wishes to stop the chair, for any reason, before all functions have reached their programmed position, the STOP button may be pressed. When the STOP button is pressed, the PC control board immediately de-energizes all relays, causing the chair to stop. The STOP button overrides all other commands. When a programmed position button is selected, it can be pressed and then released; it does not need to be held down. However, there is a selector switch; S on the old style PC control board and SW- on new style PC control board, that can be switched to change this. Then the programmed position button must be pressed and held until the chair reaches its programmed position; if the button is released, the chair will stop moving. The switch (S) works as follows: When the switch S is pushed in, the programmed position button can be pressed and released. When the switch S is pulled out, the programmed position button must be pressed and held. The Switch SW- works as follows: When switch is ON, programmed position buttons can be pressed and released. When switch SW- is OFF, programmed position buttons must be pressed and held. Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

8 SECTION I GENERAL INFORMATION Auto Return Function Operation: When the operator presses the AUTO RETURN button, the PC control board determines which functions need to move and energizes the relays for the actuator assemblies of those functions. The PC control board uses the method described in "normal operation" to determine when an actuator assembly of a function has reached the mechanical home position. When an actuator assembly of a function reaches its home position, its relay is de-energized. This continues until both actuator assemblies have reached their mechanical home position. The PC control board adds a slight overrun time to each function during the AUTO RETURN mode to ensure both actuator assemblies reach their mechanical home position and freewheel. This allows the mechanical "home" position of the actuator assemblies to be synchronized with the PC control board's software "home" position, which is important if correct program positioning of chair is to be achieved. If the operator wishes to stop the chair for any reason, before all functions have reached their programmed position, the STOP button may be pressed. When the STOP button is pressed, the PC control board immediately de-energizes all relays, causing the chair to stop. The STOP button overrides all other commands. Re-initialization: If a PC control board loses power for approximately days or longer, the chair must be re-initialized. If the chair does not move to correct programmed positions even after an AUTO RETURN has been initiated, the PC control board probably needs re-initialized. To reinitialize the PC control board, the PROGRAM, POSI- TION "", and POSITION "" buttons on the hand control must be pressed and held for at least seconds. The PC control board makes all buttons inactive, except for the AUTO RETURN button and STOP button. The AUTO RETURN button should now be pressed which will cause the chair to run each actuator assembly to its mechanical home position. The reinitialization procedure must be fully completed before normal operation of the chair can be resumed. The reinitialization routine takes approximately 8 seconds to complete. Audible Alert Tones: (See Table -) The new style PC control board has audible tones to provide feedback to the operator. SW- controls whether the tones are activated or deactivated; if SW- is ON, tones are activated. If SW- is OFF, tones are deactivated. General Information: A capacitor is in each actuator assembly circuit. The capacitor provides start up power and run power for the actuator motor. The PC control board constantly monitors the control disable switch for + VDC. If 0.0 VDC is detected (the control disable switch is ON, meaning the chair is disabled), the PC control board disables the relays of all functions and removes power from the foot control or hand control. If + VDC is detected (the control disable switch is OFF, meaning the chair is enabled), the PC control board operates normally. The control disable switch is located under the left electrical outlet. This function allows the controls to be disabled, preventing unauthorized personnel from operating the chair, such as a patient. The maximum number of buttons that can be pressed at one time is three; if any more than three buttons are pressed at one time, the PC control board forces the STOP function to be executed. There is either a capacitor or a battery on the old style PC control board that provides power to retain the board's memory. The PC control board will retain its memory for approximately days. On new style PC control boards, there is a EEPROM chip which retains the board's memory indefinitely. Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

9 AMP BPXXXXX SECTION I GENERAL INFORMATION. SPECIFICATIONS Factual data for the Power Podiatry Examination Chair is provided in Table -. Table -. Specifications Description Data Weight: Without Shipping Carton lb (.8 kg) With Shipping Carton... 0 lb (9. kg) Shipping Carton... in. "L" x in. "W" x in. "H" (9 cm x 88.9 cm x 9. cm) Dimensions: Table Top Length... 0 in. (.8 cm) Table Top Length with foot section fully extended... 8 / in. (99.9 cm) Table Top Width (including arms)... 8 /8 in. (. cm) Recommended Circuit: A separate (dedicated) circuit is recommended for this chair. The chair should not be connected to an electrical circuit with other appliances or equipment unless the circuit is rated for the additional load.. Parts Replacement Ordering If a part replacement is required, order the part directly from the factory as follows: () Refer to Figure - to determine the location of the model number and serial number of the chair and record this data. () Refer to the Parts List to determine the item numbers of the parts, part numbers of the parts, descriptions of the parts, and quantities of parts needed and record this data (Refer to para.). Chair Positioning: Table Top Height (Fixed).... in. (. cm) Back Down to Back Up Tilt Down to Tilt Up Chair Speed: Back Down to Back Up... 8 seconds Tilt Down to Tilt Up... 8 seconds MODEL NUMBER Debris Tray... Extends 8 / in (. cm) beyond foot section Minimum Height at foot section w/o tilt in. (9. cm) Maximum Height at foot section with maximum tilt... / in. (9. cm) Maximum Height at foot section with maximum tilt, and foot section fully extended.. 9 / in. (00. cm) Weight Capacity (Normal Operation) lb ( kg) Weight Capacity (Overweight Operation)... 0 lb (9 kg) Electrical Requirements: VAC Unit VAC, 0 HZ, amp, single phase Power Consumption: VAC Unit... 0 WATTS, 0 VAC MODEL INPUT RATING SERIAL NO. MIDMARK VAC 0 HZ AMP BNXXXXX SERIAL NUMBER MIDMARK MA-0 Figure -. Model Number / Serial Number Location NOTE Ask the Purchasing Department of the company that owns the chair for this information. Otherwise, this information may be obtained from the dealer that sold the chair. () Determine the installation date of the chair and record this data. () Call Midmark with the recorded information and ask for the Medical Products Technical Services Department. See back cover of this manual for the phone number or use the Fax Order Form (See page - for Fax Order Form). MODEL INPUT RATING SERIAL NO. MIDMARK VAC 0 HZ Midmark 99 SF-8 Rev. 8/0 Page - Printed in U.S.A.

10 SECTION I GENERAL INFORMATION. Special Tools Table - lists all of the special tools needed to repair the chair, how to obtain the special tools, and the purpose of each special tool. Description of Special Tool Manufacturer's Name / Address / Phone Table -. Special Tool List Manufacturer's Part Number Purpose of Special Tool Multimeter Commercially Available Any Type Used to perform continuity and voltage checks. Torque Wrench Commercially Available Any Type Used to tighten hardware to specified torque values. Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

11 SECTION II TESTING AND TROUBLESHOOTING SECTION II TESTING AND TROUBLESHOOTING. Operational Test (See Figure -) In order to effectively diagnose the malfunction of the chair, it may be necessary to perform an operational test as follows:! DANGER Refer to the Operator Manual for complete instructions on operating the chair. Failure to do so could result in personal injury. NOTE The Operational Test, for the most part, only describes what should happen when the chair is operated. If the chair does something other than described, a problem has been discovered. Refer to the Troubleshooting Guide to determine the cause of the problem and its correction. () Plug the chair into a grounded, non-isolated, correctly polarized outlet that has the proper voltage output for the chair. NOTE To disable the chair, the control disable switch must be thrown toward foot end of chair. () Switch the CONTROL DISABLE switch to the disable position (See Figure -). () Depress BACK UP, BACK DOWN, TILT UP, and TILT DOWN buttons on hand control. () Observe. No functions should operate. NOTE To enable the chair, the control disable switch must be thrown toward head end of chair. () Switch the CONTROL DISABLE switch to enable position. () Depress BACK UP, BACK DOWN, TILT UP, and TILT DOWN buttons on hand control and run each function to its limit. () Observe. The table top should move in the direction corresponding to the button which is being depressed. Each function should have the following range of motion: TILT DOWN to TILT UP - 0 to 0 BACK DOWN to BACK UP - to -8 Function speeds should be as follows: BACK DOWN to BACK UP - 8 seconds TILT DOWN to TILT UP - 8 seconds. When an actuator assembly reaches its limit, the PC control board or limit switches should automatically stop the function from freewheeling after a short time. The arm rests should be parallel with the seat section of the table top when the back section is all the way up. (8) Depress the AUTO RETURN button. After the table top starts to move, depress the STOP button. (9) Observe. When the AUTO RETURN button is depressed, the table top should begin to move. When the STOP button is depressed, the table top should stop moving. (0) Depress the AUTO RETURN button and allow the table top to move to its home position completely. () Observe. The table top should move until it reaches the home position. The entire routine should take approximately 8 seconds to complete. () Depress the PROGRAM button on hand control - one second for new style board and 0. seconds for old style board. NOTE A program position button must be depressed within seconds of depressing the PROGRAM button. () Depress the POSITION "" button. Midmark Corporation 99 SF-8 Rev./0 Page - Printed in U.S.A.

12 UP UP UP UP SECTION II TESTING AND TROUBLESHOOTING HAND CONTROL BUTTONS BACK UP STOP AUTO RETURN TILT UP BACK TABLE MIDMARK TABLE DOWN POSITION "" POSITION "" POSITION POSITION "" POSITION POSITION AUTO RETURN POSITION STOP POSITION FOOT TILT FOOT DOWN TILT DOWN BACK DOWN POSITION "" PROGRAM BACK DOWN TILT DOWN TABLE TOP SEAT SECTION ARM REST BACK SECTION FOOT SECTION CONTROL DISABLE SWITCH PARALLEL MIDMARK MA-0 Figure -. Operational Test Midmark Corporation 99 SF-8 Page - Printed in U.S.A.

13 SECTION II TESTING AND TROUBLESHOOTING () Use any of the single function buttons to move the table top to a new position. () Depress the POSITION "" button. () Repeat steps thru for the POSITION "", "", and "" buttons.. Troubleshooting Procedures () Observe. The table top should move back to the position programmed in steps and. Table -. Troubleshooting Guide Table - is a Troubleshooting Guide which is used to determine the cause of the malfunction. Problem Symptom Probable Cause Check Correction Chair will not operate when any of the four up and down functions, program function, or auto return function are selected. When a hand control button is depressed, its actuator does not run or hum. Power cord is not plugged into facility wall outlet. Check to see if power cord is plugged in. Plug power cord into facility wall outlet and/or connector receptacle on chair. Control disable switch is turned to "OFF" position. Check to see if control disable switch is in the "OFF" position (located on bottom side of one of the chair's two electrical outlets). Switch the control disable switch to "ON" position. Control disable switch is malfunctioning. Perform a continuity check on the control disable switch. Replace the control disable switch. Refer to para.. Facility circuit breaker providing power to chair is tripped. Check to see if facility circuit breaker is tripped. One way of checking this is to plug a lamp into wall outlet that chair was plugged into. If circuit breaker is tripped, determine what caused circuit breaker to trip, correct the problem, and then reset/replace circuit breaker. Wire connections loose. Check all wiring connections from power cord to connector J on the PC control board. Perform continuity check on wires. Use multimeter to check for proper voltage levels. Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. 0. amp fuse or 0 amp fuse on old style PC control board or 0. amp fuse on new style PC control board is blown. Refer to Figure - for this check. Perform continuity check on fuses. Replace any blown fuses. The supply voltage for the PC control board is below normal limits. Check facility power source for voltage between 0-0 VAC. If volatge is below 0 VAC, correct low voltage problem of facility power source. PC control board is locked up and needs to be reinitialized. Reinitialize the PC control board. Refer to para.. PC control board is malfunctioning. Replace suspect PC control board with known working PC control board. On new style PC control boards, check if green Board Fail L.E.D. is flashing. Flashing indicates normal operation, while not flashing indicates a malfunction. Replace PC control board. Refer to para.. Midmark Corporation 99 SF-8 Rev. /9 Page - Printed in U.S.A.

14 SECTION II TESTING AND TROUBLESHOOTING OLD STYLE 0. amp. FUSE 0 amp. FUSE L.E.D. NOT USED ON MODEL L.E.D. NOT USED ON MODEL BACK UP L.E.D. BACK DOWN L.E.D. TILT UP L.E.D. TILT DOWN L.E.D. L.E.D.'S NOT USED ON MODEL NEW STYLE BACK DOWN L.E.D. TILT UP L.E.D. TILT DOWN L.E.D. BOARD FAIL L.E.D. 0. amp. FUSE L.E.D. NOT USED ON MODEL L.E.D. NOT USED ON MODEL BACK UP L.E.D. amp. FUSES L.E.D. NOT USED ON MODEL L.E.D. NOT USED ON MODEL MA-0 Figure -. Indicator L.E.D.'s For Use With Troubleshooting Guide Midmark Corporation 99 SF-8 Page - Printed in U.S.A.

15 SECTION II TESTING AND TROUBLESHOOTING Table -. Troubleshooting Guide - Continued Midmark Corporation 99 SF-8 Rev. 0/99 Page - Printed in U.S.A. roblem P m ympto S e Caus robable P k hec C n Correctio when operate not will Chair down and up four the of any program function, functions, are function return auto or Continued. - selected control hand a When its depressed, is button or run not does actuator Continued. hum - cord coil or control Hand malfunctioning. suspect Replace known with component component. working malfunctioning Replace component. initiated be can actions No control. from hand no but power, has Chair initiated be can functions control. from hand into plugged not is cord Coil receptacle or control hand properly. chair on is cord coil if Check properly. in plugged hand into cord coil Plug chair. on receptacle or control connections. dirty any Clean from hand connector Ribbon become has panel control from the disconnected board. interface ribbon if Check connected is connector board interface the to properly. of connector ribbon Connect interface to panel control hand.. para to Refer board. chair on receptacle cord Coil malfunctioning. is into control hand Plug side other on receptacle attempt then and chair of works If chair. operate to was receptacle now, malfunctioning. receptacle. Replace part (is receptacle cord Coil hand on board) interface of malfunctioning. is control suspect Replace with board interface interface working known board. board. interface Replace.. para to Refer malfunctioning. is cord oil C o t multimeter a Use continuity perform a cord. coil the on check cord. coil Replace is control Hand malfunctioning. suspect Replace with board interface interface working known board. board. interface Replace.. para to Refer hand suspect Replace known with panel control control hand working panel. panel. control hand Replace.. para to Refer was routine Reinitialization completed. fully not n reinitializatio another Run work, doesn't it If procedure. wire actuator all unplug and from PC board harnesses initialization third a run.. para to Refer procedure. functions more or One from initiated be cannot control. hand be may functions Some hand with initiated may some but control, not. hand of panel control Hand malfunctioning is control is membrane (switch malfunctioning). hand suspect Replace known with panel control control hand working panel. panel. control hand Replace.. para to Refer BACK and BACK UP not do DOWN functions work. BACK UP and When BACK DOWN buttons chair the pressed, are other (all move not will work). functions or weak is capacitor Back blown. back suspect Replace known with capacitor capacitor. back working Refer capacitor. back Replace.. para to in switch overload Thermal is assembly actuator back activated. w allo to minutes 0 to 0 Wait to assembly actuator back cool. is assembly actuator Back malfunctioning. back suspect Replace or assembly actuator a with motor actuator working known assembly. or motor actuator Replace Refer assembly. actuator back.. or.8 para to

16 SECTION II TESTING AND TROUBLESHOOTING Table -. Troubleshooting Guide - Continued Problem Symptom Probable Cause Check Correction BACK UP and BACK DOWN functions do not work - Continued. When BACK UP and BACK DOWN buttons are pressed, the chair will not move (all other functions work) - Continued. amp fuse for BACK UP and BACK DOWN functions is blown (applies to new style PC board only). Refer to Figure - for this check. Perform continuity check on fuse. Replace blown fuse. Wire connections loose. Check all wiring connections back actuator assembly. to Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Back actuator is drawing excessive current for more than 0. seconds. Release all buttons. Then, run back actuator again to see if it stops running again. If problem repeats, replace back capacitor, actuator motor, or actuator. Refer to para.,.8, or.. PC control board malfunctioning. is Refer to Figure - for this check. Press BACK UP and then the BACK DOWN button while observing the PC control board. The BACK UP L.E.D. should illuminate when the BACK UP button is pressed and the BACK DOWN L.E.D. should illuminate when the BACK DOWN button is pressed. If not, the PC control board is malfunctioning. Replace PC control board. Refer to para.. TILT UP and TILT DOWN functions do not work. When TILT UP and TILT DOWN buttons are pressed, the chair will not move (all other functions work). Tilt capacitor is weak or blown. Replace suspect tilt capacitor with known working tilt capacitor. Replace tilt capacitor. Refer to para.0. Thermal overload switch in tilt actuator assembly is activated. Wait 0 to 0 minutes to allow tilt actuator assembly to cool. Tilt actuator assembly is malfunctioning. amp fuse for TILT UP and TILT DOWN functions is blown (applies to new style PC board only). Wire connections loose. Tilt actuator is drawing excessive current for more than 0. seconds. PC control board malfunctioning. is Replace suspect tilt actuator assembly or actuator motor with a known working assembly. Refer to Figure - for this check. Perform continuity check on fuse. Check all wiring connections tilt actuator assembly. to Release all buttons. Then, run tilt actuator again to see if it stops running again. Refer to Figure - for this check. Press TILT UP and then the TILT DOWN button while observing the PC control board. The TILT UP L.E.D. should illuminate when the TILT UP button is pressed and the TILT DOWN L.E.D. should illuminate when the TILT DOWN button is pressed. If not, the PC control board is malfunctioning. Replace actuator motor or tilt actuator assembly. Refer to para.8 or.9. Replace blown fuse. Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. If problem repeats, replace tilt capacitor, actuator motor, or actuator. Refer to para.0,.8, or.9 Replace PC control board. Refer to para.. Midmark Corporation 99 SF-8 Rev. /9 Page - Printed in U.S.A.

17 Table -. Troubleshooting Guide - Continued SECTION II TESTING AND TROUBLESHOOTING Problem Symptom Probable Cause Check Correction BACK UP function works, but BACK DOWN function does not or BACK DOWN function works, but BACK UP function does not. All other functions work. One function runs properly, but the other does not. Wire connections loose. Check all wiring connections to base actuator assembly. Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Back Down or Up Limit Switch, Normally Closed contacts, are open or wire disconnected. Check condition of Back Down or Up Limit Switch contacts and connections. Repair or replace Back Down or Up Limit Switch. R efer to para.. PC control board malfunctioning. is Refer to Figure - for this check. Press BACK UP and then the BACK DOWN button while observing the PC control board. The BACK UP L.E.D. should illuminate when the BACK UP button is pressed and the BACK DOWN L.E.D. should illuminate when the BACK DOWN button is pressed. If not, the PC control board is bad. Replace PC control board. Refer to para.. Hand control panel of hand control is malfunctioning (switch membrane is malfunctioning). Replace suspect hand control panel with known working hand control panel. Replace hand control panel. Refer to para.. TILT UP function works, but TILT DOWN function does not or TILT DOWN function works, but TILT UP function does not. All other functions work. One function runs properly, but the other does not. Wire connections loose. Check all wiring connections to tilt actuator assembly. Clean any dirty connections. Tighten any loose connections. Replace any damaged connections. Tilt Down or Up Limit Switch Normally Closed contacts are open or wire disconnected. Check condition of Tilt Down or Up Limit Switch contacts and connections. Repair or replace Tilt Down or Up Limit Switch. R efer to para. 9. PC control board malfunctioning. is Refer to Figure - for this check. Press TILT UP and then the TILT DOWN button while observing the PC control board. The TILT UP L.E.D. should illuminate when the TILT UP button is pressed and the TILT DOWN L.E.D. should illuminate when the TILT DOWN button is pressed. If not, the PC control board is malfunctioning. Replace PC control board. Refer to para.. Hand control panel of hand control is malfunctioning (switch membrane is malfunctioning). Replace suspect hand control panel with known working hand control panel. Replace hand control panel. Refer to para.. Midmark Corporation 99 SF-8 Rev. /0 Page - Printed in U.S.A.

18 SECTION II TESTING AND TROUBLESHOOTING Table -. Troubleshooting Guide - Continued Problem Symptom Probable Cause Check Correction Auto return function does not operate properly. Nothing happens when the AUTO RETURN button is pressed. PC control board malfunctioning. is Replace suspect PC control board with known working PC control board. Replace PC control board. Refer to para.. PC control board reinitialized. needs Reinitialize the PC control board. Refer to para.. Hand control panel of hand control is malfunctioning (switch membrane is malfunctioning). Replace suspect hand control panel with known working hand control panel. Replace hand control panel. Refer to para.. The chair's PROGRAM function does not work properly. The PC program board / PC control board does not hold a programmed position. Incorrect steps taken for entry of position. Refer to the operator's manual for proper procedure. Refer to the operator's manual for proper procedure. PC program board is not fully seated into PC control board (on units with old style boards only). Check to see if PC program board is loose. Seat PC program board fully into PC control board. Refer to para.. Chair has been unplugged or without power for more than three days. PC control board reinitialized. needs Reinitialize the PC control board. Refer to para.. Reinitialize the PC control board. Refer to para.. Hand control panel of hand control is malfunctioning (switch membrane is malfunctioning). Replace suspect hand control panel with known working hand control panel. Replace hand control panel. Refer to para.. PC program board control board is malfunctioning. / PC Replace PC program board / PC control board. Refer to para.. Chair does not move to its correct programmed position when POSITION "", "", "", or "" button is pressed. PC program board is not fully seated into PC control board (applies to units with old style PC control board only). Check to see if PC program board is loose. Seat PC program board fully into PC control board. Chair has been unplugged or without power for more than three days. PC control board reinitialized. needs Reinitialize the PC control board. Refer to para.. Reinitialize the PC control board. Refer to para.. Hand control panel of hand control is malfunctioning (switch membrane is malfunctioning). Replace suspect hand control panel with known working hand control panel. Replace hand control panel. Refer to para.. PC program board control board is malfunctioning. / PC Replace PC program board / PC control board. Refer to para.. Midmark Corporation 99 SF-8 Rev. /0 Page -8 Printed in U.S.A.

19 SECTION II TESTING AND TROUBLESHOOTING Table -. Troubleshooting Guide - Continued Problem Symptom Probable Cause Check Correction The chair's PROGRAM function does not work properly. Chair will not move to its programmed position unless programmed POSITION button is held down for entire move; if button is released during move, chair stops. If old style PC control board, selector switch S, located on the PC control board, is pulled out (when S switch is in pulled out position, the programmed POSITION switch must be pressed and held). If new style PC control board, selector switch SW-, located on the PC control board, is in OFF position (when switch is in OFF position, the programmed POSITION switch must be pressed and held). Check if Switch S, on old style PC control board, is in pulled out position or if switch SW- on new style PC control board is in OFF position. Push switch S all the way in or move switch SW- to ON position (this will allow programmed POSITION button to be pressed and released instead of pressed and held). Chair moves fine for light patient, but will not move or moves slowly for very heavy patient. Occurs for both the up and the down functions. Low voltage is being supplied to chair. Check voltage at wall receptacle. Should be VAC ± VAC. Correct low voltage situation at wall receptacle. Chair overloaded with too heavy of a patient. Maximum weight capacity for chair is 0 lbs. Check if patient exceeded this weight. Inform chair operator of weight limitation of chair. Capacitor for function is weak. Replace suspect capacitor with known working capacitor. Replace capacitor for the weak function. Refer to para.0 or.. A chair function will only run for a short time. After a / second run time, the selected function stops running. Overcurrent draw is being detected by PC control board. Replace actuator motor or capacitor. The 0V / 0 V selector switch on the PC control board is set to the 0 Volt setting. Check to see if the 0V / 0 V selector switch on the PC control board is set to the 0 Volt setting. Switch the 0V / 0 V selector switch on the PC control board to the 0 Volt setting. Any of the functions drift by themselves. Chair functions otherwise. properly Motor actuator brake is malfunctioning for that function. Replace suspect actuator brake in the motor actuator with known working actuator brake. Replace actuator brake. Refer to para.8. Whirling or squeaking noise is heard when an actuator is being run. Noisy actuator. Foreign matter on ball screw threads and lack of lubricant. Check for foreign matter on ball screw threads. Check for lack of lubricant on ball screw threads. Clean all foreign matter off of ball screw threads. Coat ball screw threads with STP treatment oil or equivalent. Midmark Corporation 99 SF-8 Rev. /0 Page -9 Printed in U.S.A.

20 SECTION II TESTING AND TROUBLESHOOTING Midmark Corporation 99 SF-8 Page -0 Printed in U.S.A.

21 . Scheduled Maintenance Table - is a Scheduled Maintenance Chart which lists the inspections and services that should be performed SECTION III SCHEDULED MAINTENANCE Table -. Scheduled Maintenance Chart Interval Inspection or Service What to Do SECTION III SCHEDULED MAINTENANCE periodically on the chair. These inspections and services should be performed as often as indicated in the chart. Semi-annually Obvious damage Visually check condition of chair for obvious damage such as: cracks in components, missing components, dents in components, or any other visible damage which would cause chair to be unsafe to operate or would compromise its performance. Repair chair as necessary. Fasteners/hardware Warning and instructional decals Pivot points/moving parts/accessories Hand Control PROGRAM function AUTO RETURN function Ball screws of actuator assemblies Actuator assemblies Drift in chair Check chair for missing or loose fasteners/hardware. Replace any missing hardware and tighten any loose hardware as necessary. Check for missing or illegible decals. Replace decals as necessary. Lubricate all exposed pivot points, moving parts, and accessories with silicone based lubricant. Check that hand control works correctly. Make sure all switch membranes work correctly. Check that the PROGRAM function works properly. Check that programmed positions can be stored and used. Check that the AUTO RETURN function works correctly. Extend each actuator assembly and wipe ball screw threads down with a rag to remove foreign matter. Coat as much of the ball screw threads as possible with STP treatment oil or equivalent. Run each actuator assembly to both ends of its travel a couple of times to spread the oil evenly over all of the ball screw threads and then remove excess oil. Operate each function and listen for squealing noises, indicating a bad actuator assembly. Coat ball screw of noisy actuator assembly with STP treatment oil or equivalent. If oil does not correct the problem, replace the noisy actuator. Refer to para.9 or.. Check each actuator assembly to see if it drifts. Replace actuator assembly brake if necessary. Refer to para.8. Control disable switch Check operation of control disable switch. Replace switch if necessary. Refer to para.. Arm Rests Foot section Electrical receptacles Upholstery Accessories Check that arm rests are parallel to the seat section of chair when the back section is all the way up. If not adjust arm rests. Refer to para.. Check operation of foot section and foot section brake lever. Make sure brake lever holds foot section securely in place when released. Adjust if necessary. Refer to para.. Check that the electrical receptacles are functioning properly. Replace electrical receptacles as necessary. Check all upholstery for rips, tears, or excessive wear. Replace cushions as necessary. Check that all accessories have all of their components and that they function properly. If necessary, repair or replace the accessory. Reinitialization Reinitialize the PC control board. Refer to para.. Operational Test Perform an Operational Test to determine if the chair is operating within its specifications (Refer to para.). Replace or adjust any malfunctioning components. Midmark 99 SF-8 Page - Printed in U.S.A.

22 SECTION III SCHEDULED MAINTENANCE Midmark 99 SF-8 Page - Printed in U.S.A.

23 SECTION IV MAINTENANCE / SERVICE. Introduction SECTION IV MAINTENANCE / SERVICE INSTRUCTIONS HAND CONTROL DANGER Refer to the Operator Manual for complete instructions on operating the chair. Failure to do so could result in personal injury. AUTO RETURN BUTTON POSITION "" BUTTON POSITION POSITION AUTO RETURN POSITION STOP POSITION TABLE TABLE UP DOWN BACK BACK UP DOWN TILT TILT UP DOWN FOOT FOOT UP DOWN MIDMARK NOTE Perform an operational test on the chair after the repair is completed to confirm the repair was properly made and that all malfunctions were repaired. The following paragraphs contain removal, installation, repair, and adjustment procedures for the chair.. Reinitialization Procedure A. Reinitialization NOTE The PROGRAM button must be depressed first, or the chair will begin to move. () Simultaneously depress and hold the PRO- GRAM, POSITION "", and POSITION "" buttons for at least two seconds; then release buttons. See Figure -. CAUTION When the following step is performed, the chair will move all of its functions. Make sure chair is clear of all obstructions. Failure to do so could result in damage to chair or surrounding items. () Depress and release the AUTO RETURN button. () Observe. Each actuator assembly will run for approximately 8 seconds to ensure that it reaches its mechanical home position (if the run time is less than 8 seconds, the procedure probably did not work and should be attempted again). The mechanical home position is: BACK UP function all the way up and TILT DOWN function all the way down. When actuator assemblies stop running, the reinitialization procedure is complete. Figure -. Reinitialization Procedure () If first reinitialization procedure fails, unplug all actuator wire harnesses from PC board and run another reinitialization procedure. Then, reconnect wire harnesses.. Table Top A. Removal POSITION () Raise BACK UP and TILT UP functions all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. POSITION "" BUTTON PROGRAM BUTTON () Unplug power cord wire harness (, Figure -) from wire harness (). () Cut cable tie which is securing wires/wire harness to table top. MA () Remove four nuts () and lockwashers () from studs (). Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

24 SECTION IV MAINTENANCE / SERVICE DANGER Table top weighs approximately 0 lbs (. kg) (without upholstery). Use an assistant to help in removing table top. Use proper lifting techniques to prevent back strain. Failure to do so could result in serious personal injury. () With the help of an assistant, remove table top () from plate (). B. Installation () With the help of an assistant, install table top () on plate () and secure with four lockwashers () and nuts (). () Connect power cord wire harness () to wire harness (). () Secure wires/wire harness to table top with cable tie. () Plug power cord into wall receptacle.. Shrouds A. Removal () Remove table top (Refer to para.). () Remove four screws (, Figure -) and base outer shroud () from base subassembly (). () Remove shims (), making sure to note number and location of shims for installation. B. Installation () Place shims () in same location on base subassembly () in which they were removed from. NOTE Make sure the shims are held in place by a screw. () Install base outer shroud () on base subassembly () and secure with four screws (). () Install table top (Refer to para.). CABLE TIE MIDMARK MIDMARK MA Figure -. Table Top MA Figure -. Shrouds Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

25 CAUTION Hskfyrk iuh liuhryub IUjdj SECTION IV MAINTENANCE / SERVICE. Control Disable Switch A. Removal DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. NOTE Control disable switch can be located on either side of the chair. The following procedure shows the switch being removed from the patient's left side of the chair. () Remove four screws (, Figure -) and partially separate control cover () from plastic seat section (). () Disconnect two wires () from control disable switch (). () Connect two wires () to control disable switch (). () Install control cover () on plastic seat section () and secure with four screws ().. Hand Control Plug-In Port A. Removal DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Remove four screws (, Figure -) and partially separate control cover () from plastic seat section (). () Remove clip () and hand control port () from control cover (). () Press on four tabs of control disable switch (), while simultaneously pulling control disable switch out of control cover (). B. Installation CONNECTOR 8 () Push control disable switch () into control cover () until it "pops" into place, making sure terminals "" and "" are pointing toward foot end of table. CAUTION Hskfyrk iuh liuhryub IUjdj JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl MIDMAR MIDMAR TABS Figure -. Control Disable Switch MA8-0 Figure -. Hand Control Plug-In Port MA8-0 Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

26 SECTION IV MAINTENANCE / SERVICE () Remove six screws () and partially separate receptacle cover () from plastic seat section (). () Disconnect connector of hand control port () from modular coupler (8). B. Installation () Connect connector of hand control port () to modular coupler (8). STUDS 0 8 () Install receptacle cover () on plastic seat section () and secure with six screws (). () Install hand control port () on control cover () and secure with clip (). () Install control cover () on plastic seat section () and secure with four screws (). () Plug power cord into wall outlet.. PC Control Board / Program PC Board A. Removal DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Remove four screws (, Figure -) and back cover () from plastic back section (). () Tag and disconnect four wire harnesses () from PC control board (). () Disconnect cord set () from PC control board (). () Remove seven nuts () and lockwashers (8) from studs of back weldment (9). NOTE The new style PC control board is a single board which contains both the PC control board and the PC program board. Step does not apply to units with the new style board. 9 Figure -. PC Control Board / Program PC Board MA8-0 () Remove PC control board () and PC program board (0) as an assembly from studs of back weldment (9). () Disconnect PC program board (0) from PC control board (). B. Installation NOTE The new style PC control board is a single board which contains both the PC control board and the PC program board. Step does not apply to units with the new style board. () Connect PC program board (0) to PC control board (). () Install assembled PC program board (0) and PC control board () on studs of back weld-ment (9) and secure with seven lockwashers (8) and nuts (). () Connect cord set () to PC control board (). () Connect four wire harnesses () to PC control board (). () Install back cover () on plastic back section () and secure with four screws (). () Plug power cord into wall outlet. Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

27 SECTION IV MAINTENANCE / SERVICE.8 Actuator Motor / Actuator Brake (Applies To Both Actuator Assemblies) A. Removal () Remove malfunctioning actuator assembly: Tilt actuator assembly (Refer to para.9). Back actuator assembly (Refer to para.). () Remove two nuts (, Figure -) and actuator motor () from actuator mechanism (). () Remove two shoulder washers () from actuator mechanism (). B. Installation NOTE The rubber damper must be installed so its flat side faces the inside of the actuator mechanism. The actuator brake must be installed so its flattest side faces outward. The shaft of the actuator mechanism may be turned with a screwdriver to help align the keys of the actuator mechanism shaft with the key slots in actuator brake. () Install rubber damper (8), actuator brake (), and spacer () in actuator mechanism (). () Install motor coupler () on shaft of actuator motor (). () Install two shoulder washers () in actuator mechanism (). KEYS () Align keys of actuator mechanism () shaft with key slots of motor coupler () and then install actuator motor () on actuator mechanism () and secure with two nuts (). () Install actuator assembly: Tilt actuator assembly (Refer to para.9). Back actuator assembly (Refer to para.). 8 KEY SLOT KEY SLOTS MA8 () Check actuator assembly for proper operation. The actuator assembly should run normally and should not make a grinding noise; this indicates that key slots of motor coupler were not aligned properly with keys of actuator mechanism (the grinding noise also indicates that the motor coupler is being damaged). The actuator assembly should brake properly. Figure -. Actuator Motor / Actuator Brake () Remove spacer () and motor coupler () from shaft of actuator motor (). NOTE A needle nose pliers should be used to extract the actuator brake from the actuator mechanism. Grasp the raised round plate of the actuator brake with the pliers and pull. () Remove actuator brake () and rubber damper (8) from shaft of actuator mechanism (). Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

28 SECTION IV MAINTENANCE / SERVICE.9 Tilt Actuator Assembly A. Removal () Raise TILT UP function all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Cut cable ties securing wires/wire harnesses to tilt actuator assembly (, Figure -8). CABLE TIES MIDMA NOTE Place identification tags on electrical leads / wire harness for later reassembly. DISTANCE "A" 8 () Tag and disconnect tilt actuator electrical leads. NOTE Clevis pin can only be removed in one direction as shown in illustration. () While supporting foot end of table top, remove two e-rings (), clevis pin (), and motor end of tilt actuator assembly () from seat weldment bracket (). () While supporting foot end of table top, remove two e-rings (), clevis pin (), and tilt actuator assembly () from bracket (). () If tilt actuator assembly () is being replaced, measure and record Distance "A" on old actuator. B. Installation CAUTION Do not manually turn actuator shaft by hand (Figure -9). Doing so could result in misalignment of internal limit switches. Turn yoke only to align mounting holes. () Secure yoke (8, Figure -8) in position by tightening two setscrews (9). 9 Figure -8. Tilt Actuator Assembly () While supporting foot end of table top, install tilt actuator assembly () on bracket () and secure with clevis pin () and two e-rings (). () While supporting foot end of table top, install motor end of tilt actuator assembly () on seat weldment bracket () and secure with clevis pin () and two e-rings (). () Connect actuator electrical leads / harnesses. () Secure electrical leads / harnesses to tilt actuator assembly () with cable ties. () Plug power cord into wall outlet. The following step is necessary. Otherwise, the PC control board's home position will not match the mechanical home position of the base actuator assembly. () Run the AUTO RETURN function. MA0 Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

29 SECTION IV MAINTENANCE / SERVICE Yoke Shaft CAUTION Do not rotate actuator shaft. Rotate yoke only to align holes. Extended Limit Switch Retracted Limit Switch MA000i.0 Tilt Capacitor Figure -9. Tilt Actuator A. Removal () If possible, raise TILT UP function all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Using a screwdriver, pry tab of mounting bracket (, Figure -0) outward and separate tilt capacitor () from mounting bracket. MIDMARK () Remove capacitor cap () from tilt capacitor (). DANGER The capacitor contains stored electricity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching capacitor terminals or wires. Failure to comply could result in personal injury. TAB CATCH Figure -0. Tilt Capacitor MA9-0 Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

30 SECTION IV MAINTENANCE / SERVICE () Discharge tilt capacitor (). () Disconnect two wires () from terminals of tilt capacitor () and remove tilt capacitor. B. Installation () Connect one wire (, Figure -0) to each terminal group of tilt capacitor (). 9 8 () Install capacitor cap () on tilt capacitor (). () Position the bottom of tilt capacitor () on mounting bracket () and then push the top of the capacitor inward. Using a screwdriver, force the tab of the mounting bracket () down over the catch of the capacitor cap (). Make sure tilt capacitor () is held firmly in place. () Plug power cord into wall outlet.. Back Actuator Assembly A. Removal () Raise TILT UP function all the way up. () If possible, raise BACK UP function all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Cut cable tie securing wires to motor of back actuator assembly (, Figure -). () Tag and disconnect electrical leads to the back actuator. DANGER Support the back section during the next two steps. Failure to support back section could result in injury. CAUTION The back section of the table top must be supported during the next two steps. If possible, get an assistant to assist in supporting the back section. Otherwise, use another method to support back section. Failure to do so could result in damage to chair. CABLE TIE MIDMARK Figure -. Back Actuator Assembly () While supporting back section of table top, remove two e-rings (), clevis pin (), and back actuator assembly () from seat weldment bracket (). NOTE Clevis pin can only be removed in one direction as shown in illustration. () While supporting back section of table top, remove two e-rings (), clevis pin (), and back actuator assembly () from back weldment bracket (). B. Installation CAUTION Do not manually turn actuator shaft by hand (Figure -). Doing so could result in misalignment of internal limit switches. Turn yoke only to align mounting holes. () Secure yoke (0, Figure -) in position by tightening two setscrews (). 0 MA90 Midmark 99 SF-8 Rev. /0 Page -8 Printed in U.S.A.

31 SECTION IV MAINTENANCE / SERVICE Yoke Shaft CAUTION Do not rotate actuator shaft. Rotate yoke only to align holes. Extended Limit Switch Retracted Limit Switch MA000i () While supporting back section of table top, install back actuator assembly () on back weldment bracket () and secure with clevis pin () and two e-rings (). () While supporting back section of table top, install back actuator assembly () on seat weldment bracket () and secure with clevis pin () and two e-rings (). () Connect actuator electrical leads / harnesses. () Secure electrical leads / harnesses to motor of back actuator assembly () with a cable tie. () Plug power cord into wall receptacle. NOTE The following step is necessary. Otherwise, the PC control board's home position will not match the mechanical home position of the base actuator assembly. () Run the AUTO RETURN function. Figure -. Back Actuator. Back Capacitor () If possible, raise TILT UP function all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall outlet. () Using a screwdriver, pry tab of mounting bracket (, Figure -) outward and separate back capacitor () from mounting bracket. () Remove capacitor cap () from back capacitor (). DANGER The capacitor contains stored electricity. Never touch terminals of capacitor, even if power has been disconnected. Always discharge capacitor before touching capacitor terminals or wires. Failure to comply with these instructions could result in personal injury. Midmark 99 SF-8 Rev. /0 Page -9 Printed in U.S.A.

32 AMP BPXXXXX SECTION IV MAINTENANCE / SERVICE MIDMARK NOTE Units with Serial Numbers BN-000 Thru BN- have both locknuts ( and ). Units after BP- have only locknut (). () Loosen locknuts ( and ) or locknut (). CAUTION Make sure BACK UP function is all the way up when performing step, or adjustment will not be correct. () Rotate arm rod () until flat underside of arm casting () is parallel with plastic seat section (8). TAB CATCH PARALLEL MA0 Figure -. Back Capacitor () Discharge back capacitor (). () Disconnect two wires () from terminals of back capacitor () and remove back capacitor. B. Installation () Connect one wire () to each terminal group of back capacitor (). MODEL INPUT RATING SERIAL NO. MIDMARK VAC 0 HZ MIDMARK 8 () Install capacitor cap () on back capacitor (). () Position the bottom of back capacitor () on mounting bracket () and then push the top of the capacitor inward. Using a screwdriver, force the tab of the mounting bracket () down over the catch of the capacitor cap (). Make sure back capacitor () is held firmly in place. () Plug power cord into wall outlet.. Arm Rest Adjustment A. Adjustment () Raise BACK UP function all the way up. () Unplug power cord from wall outlet. () Remove four screws (, Figure -) and back cover () from plastic back section (). SERIAL NO. RATING MODEL INPUT MIDMARK Figure -. Arm Rest Adjustment VAC 0 HZ AMP BNXXXXX MA9-0 Midmark 99 SF-8 Rev. /0 Page -0 Printed in U.S.A.

33 AUTO RETURN UP UP BACK UP FOOT DOWN TABLE UP DOWN DOWN MIDMARK TABLE DOWN SECTION IV MAINTENANCE / SERVICE NOTE Units with Serial Numbers BN-000 Thru BN- have both locknuts ( and ). Units after BP- have only locknut (). () Tighten locknut () or two locknuts ( and ). () Install back cover () on plastic back section () and secure with four screws (). (8) Plug power cord into wall receptacle.. Foot Extension Brake Lever Adjustment A. Adjustment () Loosen jam nut (, Figure -). () Adjust carriage bolt () until there is a / - /8 in (. -. mm) gap between brake lever () and plastic foot section (). () Tighten jam nut ().. Hand Control Panel Or Interface Board A. Removal () Disconnect coil cord (, Figure -) from hand control. () Remove two screws () and top end cap () from hand control tube (). () Remove locating plate () from hand control tube (). CAUTION Do not pull on ribbon connectors with excessive force or damage to hand control panel or interface board could result. () Remove hand control panel () and interface board () as an assembly from hand control tube (). () Disconnect ribbon connectors of hand control panel () from connector of interface board (). TILT BACK FOOT TILT STOP POSITION POSITION POSITION POSITION POSITION RIBBON CONNECTORS CONNECTOR /" to /8" (. to.mm) Figure -. Foot Extension Brake Lever Adjustment MA9 8 SLOT "A" SCREW HOLE SLOT "B" MA98 Figure -. Hand Control Panel / Interface Board Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

34 SECTION IV MAINTENANCE / SERVICE B. Installation () Connect ribbon connectors of hand control panel () to connector of interface board (). () Make sure fishpaper (8) is in the bottom of the hand control tube () () Simultaneously, slide hand control panel () into Slot A and interface board () into Slot B of hand control tube (). () Install locating plate () into Slot B of hand control tube (). () Install top end cap () on hand control tube () and secure with two screws (). () Connect coil cord () to hand control.. Plastic Foot Section A. Removal () Remove upholstered foot section (, Figure - ) from plastic foot section (). () Remove four nuts (), washers (), and plastic foot section () from foot section weldment (). B. Installation () Install plastic foot section () on foot section weldment () and secure with four washers () and nuts (). Tighten nuts until firm; then tighten an additional / turn. () Making sure velcro strips are aligned, install upholstered foot section () on plastic foot section ().. Plastic Back Section A. Removal () Raise BACK UP function all the way up. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall receptacle. () Remove upholstered back section (, Figure - 8) from plastic back section (). VELCRO STRIPS () Remove four screws () and back cover () from plastic back section (). () While supporting arm castings (), remove cotter pin (), clevis pin (), and disconnect clevis (8) from arm tube weldment (9). Lower arm castings. () Rotate arm tube weldment (9) downward as far as it will go, so a punch can be inserted thru access hole in arm tube weldment. () Raise or lower arm casting () slightly, until punch is aligned with groove pin (0); then drive groove pin out of arm tube weldment (9). (8) Repeat step for other arm casting (). (9) Remove two arm castings (), arm tube weldment (9), and two flanged bearings (). (0) Remove four nuts (), washers (), and plastic back section () from back weldment (). MA0 Figure -. Plastic Foot Section Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

35 AMP BPXXXXX SECTION IV MAINTENANCE / SERVICE VELCRO STRIPS ACCESS HOLE MODEL INPUT RATING SERIAL NO. MIDMARK VAC 0 HZ MIDMARK MA0-0 B. Installation () Install plastic back section (, Figure -8 ) on back weldment () and secure with four washers (), and four nuts (). Tighten nuts until firm; then tighten an additional / turn. () Install one flanged bearing () in each side of back weldment (). () Install arm tube weldment (9) and arm castings () on back weldment (). () Install one groove pin (0) in each end of arm tube weldment (9), making sure knurled end of groove pin is inserted into arm tube weldment first. () Connect clevis (8) to arm tube weldment (9) with clevis pin () and cotter pin (). Bend end of cotter pin over. () Adjust arm castings () height if necessary (Refer to para.). Figure -8. Plastic Back Section () Install back cover () on plastic back section () and secure with four screws (). (8) Making sure velcro strips are aligned, install upholstered back section () on plastic back section (). (9) Plug power cord into wall receptacle..8 Plastic Seat Section A. Removal DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall receptacle. () Remove a hand control plug-in port from each side of chair (Refer to para.). Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

36 SECTION IV MAINTENANCE / SERVICE () Remove four nuts (), washers (), and plastic seat section () from seat weldment (). B. Installation () Install plastic seat section (, Figure -9) on seat weldment () and secure with four washers () and nuts (). Tighten nuts until firm; then tighten an additional / turn. () Feed wires thru wire holes on each side of plastic seat section (). WIRE HOLE NOTE The left side of the chair has seven wires to connect; the right side of the chair has six wires to connect. MIDMARK () Connect six/seven wires () to terminals of electrical receptacles () and secure by tightening terminal screws. () Making sure velcro strips are aligned, install upholstered foot section () on plastic foot section (). () Install control disable switch (Refer to para.). TERMINAL SCREWS Figure -9. Plastic Seat Section () Remove control disable switch (Refer to para.). MA0-0 () Install hand control plug-in port on each side of chair (Refer to para.). () Plug power cord into wall receptacle. () Remove upholstered seat section (, Figure - 9) from plastic seat section (). NOTE The left side of the chair has seven wires to disconnect; the right side of the chair has six wires to disconnect. () Loosen terminal screws of electrical receptacles (); then tag and disconnect six/seven wires () from each electrical receptacle. Remove electrical receptacles. () Pull wires thru wire holes on each side of plastic seat section () and into center of chair. Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

37 SECTION IV MAINTENANCE / SERVICE.9 Foot Extension A. Removal () Raise TILT UP function all the way up and extend foot section. DANGER Always unplug the power cord from the wall outlet before making any repairs to prevent the possibility of electrical shock. Failure to comply could result in personal injury. () Unplug power cord from wall receptacle. NOTE Use a right-angled drill and a /8" bit to drill out pop rivets. The two rear pop rivets must be accessed thru holes (A) in Foot section weldment (). (8) Drill out the six pop rivets that hold slides to foot section weldment () and remove the foot section (). (9) Remove the nuts and lockwashers (, Fig. -) that secure the slides to the seat weldment () and remove the slides and the foot section weldment. () Remove plastic foot section (Refer to Para.). NOTE If installed, loosen knobs and remove debris tray. Figure -. Foot Extension MA00i A Figure -0. Foot Extension NOTE Hold down brake release handle when removing brake shaft (, Fig. -0), then, slowly release handle and remove brake lever spring (). () Remove threaded brake shaft (, Fig. -0) by removing the two outer nuts and backing off the two inside nuts approximately /" (. cm). () Remove brake lever spring (). () Remove shoulder bolt () and threaded brake lever (). () Remove shoulder bolt () and brake release handle (). A MA000i B. Installation () Install the foot slides onto the seat weldment (, Figure -) and secure with the lockwashers () and nuts (). NOTE An extension will be required on the pop riveter head in order to install the pop rivets. () Extend the slides (, Fig. ), position the foot section (), align the holes, and secure with /" pop rivets (). MA00i Figure -. Foot Extension NOTE Place a non-permanent thread-lock on the shoulder bolts before installing. () Install the brake lever (, Figure -) and secure with should bolt (). () Install brake release handle () and secure with shoulder bolt (). () Install brake lever spring (). Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

38 SECTION IV MAINTENANCE / SERVICE Figure -. Foot Extension MA00i NOTE Depress brake release when installing threaded brake shaft (). () Install threaded brake shaft (), securing with four nuts and washers. () Adjust Brake Lever. Refer to para... (8) Install plastic foot section. Refer to para... Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

39 SECTION V SCHEMATICS AND DIAGRAMS SECTION V SCHEMATICS AND DIAGRAMS. Electrical Schematics / Wiring Diagrams Figures - and - illustrate the logic/current flow and wiring connections between the electrical components in the chair. Record serial number of table being worked on in order to determine which electrical schematic or wiring diagram to use. GREEN WHITE BLACK # FUSE (. AMP) FUSE (0 AMP) PC CONTROL BOARD # # # # # # PROGRAM PC BOARD WIRING HARNESS This N.O. switch is closed when switch is on (table enabled) and is open when switch is off, (table disabled) RED WHITE BLACK RED WHITE BLACK BLACK BLACK RED + VDC N.O. WIRING HARNESS GREEN RECEPTACLES (. AMPS MAX. EACH) CONTROL DISABLE SWITCH WIRING HARNESS BACK CAPACITOR (- M.F.D.) RED WHITE BLACK M BACK ACTUATOR MOTOR 9 R.H. SIDE HAND CONTROL PLUG-IN PORT L.H. SIDE HAND CONTROL PLUG-IN PORT WHITE GREEN BLACK POWER CORD TILT CAPACITOR (- M.F.D.) RED WHITE BLACK M TILT ACTUATOR MOTOR MA Figure -. Electrical Schematic / Wiring Diagram - Units With Serial Numbers BN-000 Thru BN-8 Midmark 99 SF-8 Rev. // Page - Printed in U.S.A.

40 SECTION V SCHEMATICS AND DIAGRAMS 0-0- FUSE (. AMP) 0-0- FUSE ( AMP) PC CONTROL BOARD GREEN WHITE BLACK # # # # # # # #9 #8 WIRING HARNESS RED WHITE BLACK RED WHITE BLACK BLACK N.O. BLACK RED + VDC WIRING HARNESS GREEN RECEPTACLES (. AMPS MAX. EACH) CONTROL DISABLE SWITCH This N.O. switch is closed when switch is on (table enabled) and is open when switch is off, (table disabled) WIRING HARNESS BACK CAPACITOR (- M.F.D.) RED WHITE BLACK R.H. SIDE HAND CONTROL PLUG-IN PORT L.H. SIDE HAND CONTROL PLUG-IN PORT WHITE GREEN BLACK POWER CORD M BACK ACTUATOR MOTOR 9 TILT CAPACITOR (- M.F.D.) RED WHITE BLACK M TILT ACTUATOR MOTOR MA0 Figure -. Electrical Schematic / Wiring Diagram - Units With Serial Numbers BN-8 Thru BN0 Midmark 99 SF-8 Rev. 9/99 Page - Printed in U.S.A.

41 NO SECTION V SCHEMATICS AND DIAGRAMS Wht Wht -00 Wiring Diagram 0 VAC 0/0 HZ Grn Grn Grn Blk Blk # Wiring Harness. Amp Fuse # # # # Amp Fuses Wht Blk Blk Blk + VDC # Main PC ControlBoard # #9 #8 Red Control Disable Switch (See Note*) Note* When Disable Switch is pressed to Open position, power is removed from all actuator motors. Main P.C. Board remains powered Hand* or Foot Control Wht / Yel Violet Gray L.H. SideHand Control Plug-In Port R.H. SideHand Control Plug-In Port Foot Control Plug-In Port I/O Hand or Foot Control Interface Board Blue Wht / Violet Wht / Orange Grn Wht Blk Wht Blk Grn Wht Grn Blk Harness Wht Power Cord Harness Blk Wht Blk Capacitor (0 Mfd) Red Red Capacitor ( - Mfd) Grn / Yel Wht Blk Back UP N/C Limit Sw NC C Red Red Wht Blk Back Down N/C Limit Sw NC Tilt UP N/C Limit Sw Blk Capacitor Blk ( - Mfd) 9 8 Red Blk Thermal O/L Red VAC C Red Blk Red Wht Red Blk Red Blk Tilt Down N/C Limit Sw BACK TILT Grn / Yel NC C C NC Thermal O/L VAC Blk Static Shield Violet Gray Wht / Yel Wht / blk Brn Yel Wht Orange Red Blue Yel C NO NO TABLE UP TABLE DOWN Wht Brn NO C NO BACK UP BACK DOWN NO C NO TILT UP TILT DOWN Red NO C STOP Red NO C C NO AUTO RET. PROGRAM NO C C NO POSITION POSITION Wht / blk Wht / Violet Wht / Orange 0 VAC Amps 0 Hz ACTUATORS POSITION POSITION (On Hand Control Only) Blue MA00i CC CC NO NO *The Hand Control uses momentary push button switches as shown on switches # & #. With Back & Tilt Actuator Limit Switches (Standard After SN BN0) Blk Black CC Figure -. Electrical Schematic / Wiring Diagram - Units With Serial Numbers BN-0 Thru Present, & V00 thru V0998 Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

42 NO SECTION V SCHEMATICS AND DIAGRAMS -00 Wiring Diagram 0 VAC 0/0 HZ Wiring Harness L.H. SideHand Control Plug-In Port R.H. SideHand Control Plug-In Port Foot Control Plug-In Port Hand* or Foot Control I/O Hand or Foot Control Interface Board Violet Blue Gray Wht / Violet Wht / Yel Wht / Orange Static Shield Wht / blk Brn Yel Wht Orange Red Blue Yel NO C NO TABLE UP TABLE DOWN Brn NO C NO BACK UP BACK DOWN Violet NO C NO TILT UP TILT DOWN Red Wht / blk NO C STOP Red Gray C NO NO C AUTO RET. PROGRAM Wht / Violet Wht / Yel NO C C NO POSITION POSITION Wht / Orange POSITION POSITION (On Hand Control Only) Blue MA00i CC CC NO NO + VDC Red Blk Blk Control Disable Switch (See Note*) Note* When Disable Switch is pressed to Open position, power is removed from all actuator motors. Main P.C. Board remains powered. Main PC ControlBoard. Amp Fuse J Amp Fuses J J9 J J J J J0 Wht Blk Blk Grn Wht Blk Red Wht Grn Red Grn Wht Blk Wht Blk Grn Harness Red Wht Blk Back UP N/C Limit Sw NC C With Back & Tilt Actuator Limit Switches (Standard After SN BN0) Back Down N/C Limit Sw NC C Red Blk Tilt UP N/C Limit Sw Wht Tilt Down N/C Limit Sw NC C C NC Red Red Red Blk Red Blk Wht Grn Blk Harness Capacitor ( - Mfd) Blk Capacitor Blk ( - Mfd) 9 8 Red Blk Red BACK TILT Blk Wht Blk Wht Blk Grn / Yel Thermal O/L VAC Grn / Yel Thermal O/L VAC Power Cord ACTUATORS 0 VAC Amps 0 Hz *The Hand Control uses momentary push button switches as shown on switches # & #. Blk Wht Black CC Figure -. Electrical Schematic / Wiring Diagram - Units With Serial Numbers V0999 thru Present Midmark 99 SF-8 Rev. /0 Page - Printed in U.S.A.

43 SECTION V SCHEMATICS AND DIAGRAMS. Audible Signal Guide Chart Table - lists all of the audible signals that can be emitted by the chair and the purpose/meaning for each audible signal. Refer to the Theory of Operation section (para.b) to learn how to enable/disable the audible sounds. Table -. Audible Signal Guide Chart Audible Signal Short single beep Slow beep Fast chirping sound Slow chirping sound Intermittent beep (One second on, four seconds off) Purpose of Audible Signal When the operator is initiating a reinitialization of the PC control board using the hand control, a short single beep informs the operator that the three buttons have been depressed for the required time. When the operator initiates an AUTO RETURN, a short single beep informs the operator that the chair's "home" position has been successfully reached. When the operator selects one of the programmed positions, a short single beep informs the operator that the programmed position has been successfully reached. When the operator presses and holds the PROGRAM button for one second, a slow beep, lasting five seconds, informs the operator that the PROGRAM mode is enabled. If one of the program POSITION buttons are pressed within seconds, the chair's present position will be stored in memory. When the operator presses one of the programmed position buttons, but the PC control board determines that the programmed position data is invalid or that no position has been programmed for that particular program button, a fast chirping sound informs the operator that the programmed position data is invalid or has not been programmed and the function will not be performed. When the operator selects a single function or a programmed position function and a motor is detected to be drawing excessive current for more than 0. seconds, a slow chirping sound informs the operator of the current over-draw condition. When the operator selects a single function or a programmed position function and the function is run all the way to its end of travel (screw fully extended), a slow chirping sound informs the operator that the actuator motor's end of travel has been reached. Informs the operator / maintenance technician that the voltage levels (+ VDC and + VDC) of the PC control board are below limits. Midmark 99 SF-8 Rev. /9 Page - Printed in U.S.A.

44 SECTION V SCHEMATICS AND DIAGRAMS

45 . Introduction The illustrated parts list provides information for identifying and ordering the parts necessary to maintain the unit in peak operating condition. Refer to paragraph. for parts ordering information. The parts list also illustrates disassembly and assembly relationships of parts.. Description of Columns The Item column of the parts list gives a component its own unique number. The same number is given to the component in the parts illustration. This allows a part number of a component to be found if the technician can visually spot the part on the illustration. The technician simply finds the component in question on the illustration and notes the item number of that component. Then, he finds that item number in the parts list. The row corresponding to the item number gives the technician the part number, a description of the component, and quantity of parts per subassembly. Also, if a part number is known, the location of that component can be determined by looking for the item number of the component on the illustration. SECTION VI PARTS LIST SECTION VI PARTS LIST The Part No. column lists the MIDMARK part number for that component. The Description column provides a physical description of the component. The Qty. column lists the number of units of a particular component that is required for the subassembly. The letters AR denote as required when quantities of a particular component cannot be determined, such as: adhesive. Bullets { } in the Part No. column and the Description column show the indenture level of a component. If a component does not have a bullet, it is a main component of that illustration. If a component has a bullet, it is a subcomponent of the next component listed higher in the parts list than itself that does not have a bullet. Likewise, if a component has two bullets, it is a subcomponent of the next component listed higher in the parts list than itself that has only one bullet. Midmark 99 SF-8 Page - Printed in U.S.A.

46 TABLE TABLE UP DOWN BACK BACK UP DOWN TILT TILT UP DOWN FOOT FOOT UP DOWN AUTO RETURN STOP POSITION POSITION POSITION POSITION POSITION Pictorial Index SECTION VI PARTS LIST CAUTION Hskfyrk iuh liuhryub IUjdj JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl MIDMARK Used on units with Serial Number BN000 thru Present Used on units with Serial Number V00 thru Present Item Part No. Description Page -00 Power Podiatry Exam Chair... - Upholstery Set (Standard) {Prior to May, 989}... - Upholstery Set (Standard) {After May, 989} Upholstery Set (Soft Touch) {After May, 989} Back Section Components {BN-000 thru BN-9}... - Back Section Components {BN-0 thru BN-} Back Section Components {BN- thru Present} Seat Section Components... - Actuator Assembly (Domestic)... - Foot Section Components... - Always Specify Model & Serial Number Item Part No. Description Page Upper Chair Electrical Components {BN-000 thru BN-8} Upper Chair Electrical Components {BN-8 thru Present} Fixed Base Assembly Hand Control Assembly OPTIONAL ACCESSORIES Refer to MEDICAL ACCESSORY BOOK { } MA A900 Vision Block Assembly... 9A9 9 9A900 Instrument Tray Assembly {Prior to June, 990}... 9A9 0 9A900 Utility Tray Assembly... 9A9 9A00 Stainless Steel Debris Tray Assy. 9A 9A00 Instrument Tray Assembly {After June, 990}... 9A Midmark 99 SF-8 Rev. /0/ Page - Printed in U.S.A.

47 Upholstery Set (Standard) SECTION VI PARTS LIST MA0 Used on units built prior to May, XX Upholstery Set (Includes Items thru ) {* Specify Color} Back Section {* Specify Color} Seat Section {* Specify Color} Foot Section {* Specify Color} Law Label Arm Section {* Specify Color} Joint Connecting Bolt Joint Connecting Bolt Joint Connecting Bolt Staple (/8") Dual Velcro Lock... Plastic Seat Section (Refer to "Seat Section Components" Elsewhere)... Ref Plastic Foot Section (Refer to "Foot Section Components" Elsewhere)... Ref Plastic Back Section (Refer to "Back Section Components" Elsewhere)... Ref 9A0000 Foot Section Cover (Optional)... 9A0XX Surgery Foot Section (Optional) {* Specify Color}... * Click on the Color Selector link above to see available colors. Always Specify Model & Serial Number Midmark 99 SF-8 Rev. /0/ Page - Printed in U.S.A.

48 SECTION VI PARTS LIST OPTIONAL ACCESSORIES MA000 Used on units built after May, 989 Upholstery Set (Standard & Cal ) Upholsery Set (incl. items thru ): 00-0-xxx Standard (*Specify Color) xxx Cal (*Specify Color)... Back Section: Standard (*Specify Color) xxx Cal (*Specify Color)... Seat Section: Standard (*Specify Color) xxx Cal (*Specify Color)... Foot Section: Standard (*Specify Color) xxx Cal (*Specify Color) Law Label... Arm Section: Standard (*Specify Color) xxx Cal (*Specify Color)... * Click on the Color Selector link above to see available colors. Always Specify Model & Serial Number Joint Connecting Bolt Joint Connecting Bolt Joint Connecting Bolt Staple (/8") Velcro Kit (includes all pcs shown)... For items thru, refer to: "Seat Section Components"... Ref "FootSection Components"... Ref "Back Section Components"... Ref Items & are optional: 9A0000 Foot Section Cover (Optional)... 9A0XX Surgery Foot Section (Optional)... Midmark 99 SF-8 Rev. /08 Page -. Printed in U.S.A.

49 Upholstery Set (Soft Touch) SECTION VI PARTS LIST OPTIONAL ACCESSORY OPTIONAL ACCESSORY Used on units built after May, 989 MA00 (N.L.A.) Upholstery Set (incl. items thru ) {00-0-xx}... (N.L.A.) Back Section { }... (N.L.A.) Seat Section { }... (N.L.A.) Foot Section { } Law Label Arm Section {* Specify Code} Joint Connecting Bolt Joint Connecting Bolt Joint Connecting Bolt Staple (/8") Velcro Kit (includes all pcs shown)... Plastic Seat Section (Refer to "Seat Section Components" Elsewhere)... Ref Plastic Foot Section (Refer to "Foot Section Components" Elsewhere)... Ref Plastic Back Section (Refer to "Back Section Components" Elsewhere)... Ref 9A0000 Foot Section Cover (Optional)... 9A0XX Surgery Foot Section (Optional) {* Specify Color}... * Click on the Color Selector link above to see available colors. (N.L.A.) denotes "No Longer Available" Always Specify Model & Serial Number Midmark 99 SF-8 Rev. /08 Page -. Printed in U.S.A.

50 Back Section Components SECTION VI PARTS LIST Used on units with Serial Number BN000 thru BN9 MA Groove Pin Arm Casting Hole Plug Arm Shaft (R.H.) Groove Pin Plastic Back Section Washer Nut... 9 Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref E-Ring Clevis Pin Shoulder Screw Flanged Bearing Back Weldment Flanged Bearing... Always Specify Model & Serial Number Arm Tube Weldment (used only on units built prior to ) Arm Tube Weldment (used only on units built after ) Back Cover Screw Yoke End (L. H. Threads) Clevis Pin Cotter Pin Locknut (L.H. Threads) Plated Arm Rod Locknut (R.H. Threads) Yoke End (R.H. Threads) Arm Shaft (L.H.) Caution Label... Midmark 99 SF-8 Rev. /0/ Page - Printed in U.S.A.

51 Back Section Components SECTION VI PARTS LIST Used on units with Serial Number BN0 thru BN MA Groove Pin Arm Casting Hole Plug Arm Shaft (R.H.) Groove Pin Plastic Back Section Washer Nut... 9 Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref E-Ring Clevis Pin Shoulder Screw Flanged Bearing... Always Specify Model & Serial Number Back Weldment Flanged Bearing Arm Tube Weldment Back Cover Screw Yoke End (L. H. Threads) Clevis Pin Cotter Pin Locknut (L.H. Threads) Plated Arm Rod Locknut (R.H. Threads) Yoke End (R.H. Threads) Arm Shaft (L.H.) Caution Label... Midmark 99 SF-8 Rev./0/ Page -. Printed in U.S.A.

52 Back Section Components SECTION VI PARTS LIST Used on units with Serial Number BN thru BN8 MA Groove Pin Arm Casting Hole Plug Arm Shaft Groove Pin Plastic Back Section Washer Nut... 9 Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref E-Ring Clevis Pin... Always Specify Model & Serial Number Shoulder Screw Flanged Bearing Back Weldment Flanged Bearing Arm Tube Weldment Back Cover Screw Linkage Assembly Clevis Pin Cotter Pin Caution Label... Midmark 99 SF-8 Rev./0/ Page -. Printed in U.S.A.

53 Back Section Components SECTION VI PARTS LIST Used on units with Serial Number BN8 thru BN MA00i Groove Pin Arm Casting Hole Plug Arm Shaft Groove Pin Plastic Back Section Washer Nut... 9 Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref E-Ring Clevis Pin... Always Specify Model & Serial Number Shoulder Screw Flanged Bearing Back Weldment Flanged Bearing Arm Tube Weldment Back Cover Screw Linkage Assembly Clevis Pin Cotter Pin Caution Label... Midmark 99 SF-8 Rev. 9/0 Page -. Printed in U.S.A.

54 Back Section Components SECTION VI PARTS LIST Used on units with Serial Number BN thru Present Used on units with Serial Number V00 thru Present MA00i Groove Pin Arm Casting Hole Plug Arm Shaft Groove Pin Plastic Back Section Washer Nut... 9 Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref E-Ring Clevis Pin... Always Specify Model & Serial Number Shoulder Screw Flanged Bearing Back Weldment Flanged Bearing Arm Tube Weldment Back Cover Screw Linkage Assembly Clevis Pin Rue Ring Cotter Pin Caution Label Fuse Label... Midmark 99 SF-8 Rev. /0 Page -. Printed in U.S.A.

55 Seat Section Components SECTION VI PARTS LIST Plastic Seat Section Nut Washer... Back Weldment (Refer to "Back Section Components" Elsewhere)... Ref Flanged Bearing Shoulder Screw (Apply Loctite # ) E-Ring Clevis Pin Seat Weldment... 0 Back Actuator Assembly (Refer to "Actuator Assembly" Elsewhere)... Ref Always Specify Model & Serial Number MA Roll Pin Nut... Tilt Actuator Assembly (Refer to "Actuator Assembly" Elsewhere)... Ref Clevis Pin Upright Weldment... Fixed Base Weldment (Refer to "Fixed Base Assembly" Elsewhere)... Ref Serial Tag Patient Pending Label Danger Label... Midmark 99 SF-8 Rev./0/ Page - Printed in U.S.A.

56 Actuator Assembly SECTION VI PARTS LIST 9 8 Used on units with Serial Number BN000 thru BN8 MA Foot / Tilt Actuator Assembly (Includes Items thru 8) Foot Actuator... Nut Shoulder Washer... Always Specify Model & Serial Number Actuator Brake Motor Coupler Motor Nylon Coupler Terminals Roll Pin... Midmark 99 SF-8 Rev./0/ Page - Printed in U.S.A.

57 Actuator Assembly SECTION VI PARTS LIST Used on units with Serial Number BN9 thru BN0 MA000i Actuator Assembly (Includes Motor Coupler... Items thru 8) Isolation Washer... Actuator Mechanism Motor Nut Nylon Coupler Terminals Shoulder Washer Roll Pin... Always Specify Model & Serial Number Midmark 99 SF-8 Rev./0/ Page -. Printed in U.S.A.

58 Actuator Assembly SECTION VI PARTS LIST Used on units with Serial Number BN0 thru Present Used on units with Serial Number V00 thru Present Actuator Assembly (Includes Items thru )... Actuator Mechanism Set Screw Hex Nut Limit Switch Screw... Always Specify Model & Serial Number MA000i Actuator Motor Isolation Washer Motor Coupler Shoulder Washer Nut Nylon Coupler Terminals... Midmark 99 SF-8 Rev. 9// Page -. Printed in U.S.A.

59 Foot Section Components SECTION VI PARTS LIST Seat Weldment (Refer to "Seat Section Components" Elsewhere)... Ref Foot Section Slide Kit (Incl. Fasteners) Pop Rivet Washer Nut Threaded Brake Shaft Nylock Nut Knob Shoulder Screw (Apply Loctite # ) Shoulder Screw (Apply Loctite # ) Lever Weldment Nyl-O-Tape (") Compression Spring Plated Threaded Lever... Always Specify Model & Serial Number MA Groove Pin Bearing Washer Jam Nut Carriage Bolt E-Ring Rubber Washer Debris Tray Shaft Snap-In-Nyliner Bearing Debris Tray Wldmt. Kit (Inc. Item ) Knurled Torque Knob Debris Tray Kit (Includes Item ) Debris Tray (Less Knob) Foot Section Weldment Plastic Foot Section Washer Nut Washer (One Side Only)... Midmark 99 SF-8 Rev /0 Page - Printed in U.S.A.

60 Upper Chair Electrical Components NOTE: A smaller PC board is used in all replacement kits. It is a direct replacement for the two-part PC board. 8 SECTION VI PARTS LIST CAUTION Hskfyrk iuh liuhryub IUjdj JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl 0 Used on units with Serial Number BN000 thru BN8 MA Receptacle Cover Receptacle Clip Control Cover (R.H.S.) Screw Jack Handset Harness (Refer to "Wiring Diagram" {Section })... Ref Mounting Bracket Screw Capacitor Capacitor Cap Screw Lockwasher Wire Clip Switch Control Cover (L.H.S.) Screw Screw Lockwasher Nut Cable Tie -.0" Upper Chair Wiring Harness (Refer to "Wiring Diagram" {Section })... Ref PC Board Replacement Kit Fuse: 0A (for two-part PC board) Fuse: / A (for two-part PC board) Nut w/ starwasher Cable Tie -.8" (Not Shown)... Always Specify Model & Serial Number Midmark 99 SF-8 Rev. /0/ Page -8 Printed in U.S.A.

61 Upper Chair Electrical Components SECTION VI PARTS LIST NOTE: A smaller PC board is used in all replacement kits. It is a direct replacement for the larger PC board CAUTION Hskfyrk iuh liuhryub IUjdj JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl 0 Used on units with Serial Number BN8 thru BN MA Receptacle Cover Receptacle Clip Control Cover (R.H.S.) Screw Jack Handset Harness (Refer to "Wiring Diagram" {Section })... Ref Mounting Bracket Screw Capacitor Capacitor Cap Screw Lockwasher Wire Clip Switch Control Cover (L.H.S.) Screw Screw Lockwasher Nut Cable Tie -.0" Upper Chair Wiring Harness (Refer to "Wiring Diagram" {Section })... Ref PC Board Replacement Kit Fuse: A (large board: qty: ) Fuse: /8 A Nut w/ starwasher Cable Tie -.00" (Not Shown) Cable Tie -.8" (Not Shown)... Always Specify Model & Serial Number Midmark 99 SF-8 Rev. /0/ Page -8. Printed in U.S.A.

62 Upper Chair Electrical Components SECTION VI PARTS LIST NOTE: A smaller PC board is used in all replacement kits & newer tables. It is a direct replacement for the larger PC board CAUTION Hskfyrk iuh liuhryub IUjdj JHC HB JHBBKHJb sjhbhjb h h chjb Khjbc lks kjhklvcp ihl 0 Used on units with Serial Number BN thru Present Used on units with Serial Number V00 thru Present Receptacle Cover Receptacle Clip Control Cover (R.H.S.) Screw Jack Handset Harness (Refer to "Wiring Diagram" {Section })... Ref Mounting Bracket Screw Capacitor Capacitor Cap Screw Lockwasher Wire Clip Switch... Always Specify Model & Serial Number MA Control Cover (L.H.S.) Screw Screw Lockwasher (large board: qty: ) Screw (large board: qty: ) Cable Tie -.0" Upper Chair Wiring Harness (Refer to "Wiring Diagram" {Section })... Ref PC Board Replacement Kit Fuse: A (large board: qty: ) Fuse: /8 A Nut w/ starwasher Cable Tie -.00" (Not Shown) Cable Tie -.8" (Not Shown)... Midmark 99 SF-8 Rev. /0 Page -8. Printed in U.S.A.

63 Fixed Base Assembly SECTION VI PARTS LIST MA00 Used on units with Serial Numbers: BN000 thru Present & V00 thru V Screw Washer Base Outer Shroud Nameplate () Base Shroud Stripe Fixed Base... Always Specify Model & Serial Number Strain Relief Bushing Power Cord... 9 Power Tag (Shown on Power Cord, May Be Located on Base Weldment) NSS Screw (Newer Units Only)... NSS = Not Sold Separately Midmark 99 SF-8 Rev. /0/ Page -9 Printed in U.S.A.

64 Fixed Base Assembly SECTION VI PARTS LIST 8 9 MA0 Used on units with Serial Numbers V0 thru Present Screw Base Outer Shroud Nameplate () Base Shroud Stripe Fixed Base... Always Specify Model & Serial Number Strain Relief Bushing Power Cord... 8 Power Tag (Shown on Power Cord, May Be Located on Base Weldment) NSS Screw (Newer Units Only)... NSS = Not Sold Separately Midmark 99 SF-8 Rev. /0/ Page -9. Printed in U.S.A.

65 POSITION POSITION POSITION AUTO RETURN POSITION POSITION UP Hand Control Accessory SECTION VI PARTS LIST TABLE UP A MIDMARK B BACK TABLE DOWN STOP BACK DOWN TILT TILT UP DOWN FOOT FOOT UP DOWN C A B C PLASTIC FOOT SECTION 9A900 Hand Control Accessory (Includes Items thru ) Hand Control Assembly (Includes Items thru 0) Control Panel PC Board Locating Plate Fishpaper Insulator... Always Specify Model & Serial Number MA Top End Cap Hand Control Tube Bottom End Cap Screw Coil Cord Screw Hand Control Mounting Bracket... Midmark 99 SF-8 Rev. /9 Page -0 Printed in U.S.A.

66 SECTION VI PARTS LIST

67 The Technical Publications Department of Midmark Corporation takes pride in its publications. We are sure that our manuals will fill all of your needs when you are performing scheduled maintenance, servicing, or repairs on a Midmark product. Page(s) and Paragraph(s) Needing Changed: COMMENTS However, if you find any errors or feel that there should be a change, addition, or deletion to a manual, please let us know! Description of Error or Desired Change: Please fax or mail a copy of this completed comment sheet to: Midmark Corporation ATTN: Technical Publications Department 0 Vista Drive Versailles, Ohio 80 Fax: (9) - Midmark Corporation 000 SF- Page - Printed in U.S.A.

68 FAX ORDERING FORM (SERVICE PARTS ONLY) NOTES: ALL BLOCKED AREAS MUST BE COMPLETED. USE FOR NON-WARRANTY FAX ORDERS ONLY. WARRANTY ORDERS MUST BE TELEPHONED IN (-800-MIDMARK). ATTENTION: SERVICE DEPARTMENT FAX#: ACCT #: P.O. #: DATE: NAME: SHIP TO: ADDRESS: CITY, ST.: CONTACT: PHONE: NON-EMERGENCY ORDER - TO SHIP WITHIN HOURS IF PART(S) IN STOCK. EMERGENCY ORDER - TO SHIP WITHIN HOURS IF PART(S) IN STOCK (IF ORDER IS RECEIVED BEFORE :00 P.M. E.S.T). SEND NOTIFICATION IF PARTS ARE NOT AVAILABLE TO SHIP WITHIN HOURS VIA OR FAX TO: METHOD OF SHIPMENT OTHER UPS FED EX NEXT DAY A.M. NEXT DAY A.M. NEXT DAY P.M. NEXT DAY P.M. ND DAY ND DAY GROUND ECONOMY QTY. PART # DESCRIPTION (SPECIFY COLOR OF ITEM IF APPLICABLE) COLOR CODE PRICE/PER TOTAL COST: $ Midmark Corporation 000 Rev. /0 Page - Printed in U.S.A.

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70 Midmark Corporation 0 Vista Drive P.O. Box 8 Versailles, Ohio Fax 9-- midmark.com Subject to change without notice. Refer to for latest revision. Midmark Corporation - 00 Printed in U.S.A.