LIFI LCD Projection TV Service Training Guide

Transcription

1 LIFI LCD Projection TV Service Training Guide LIFI series LIFI = LIght FIdelity Contents: Service Policy Board Access No Start Up Shutdown Service Mode Adjustments 720p PT-50LCX7 PT-56LCX7, 70 PT-56LCX7, p PT-50LCZ7, 70 PT-56LCZ7, 70 PT-56LCZ7, inception year Pwr Pwr lamp Button LED LED Model PT-56LCX70 shown Useful Part Numbers

2 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 2 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

3 LIFI New Lamp Technology Fast starting (less than 10 sec) Higher frequency so there is no lamp hum Lower RF noise level compared to Mercury Vapor lamps High temperature so it must be heat sinked and forced cooled. No flicker like mercury vapor lamps at the beginning and end of life Long life span Lamp. Warranty is 5 years (original lamp, consumer use). Lamp assembly needs: 26Vdc power, and Lamp-On signal (5V) to start (light). Microprocessor in the lamp assembly heats for pre-start & sweeps RF frequency for ignition Lamp assembly micro communicates with the TV micro (no communications no shutdown, just audio) Top lamp fan front LIFI lamp assembly is underneath Remove the top power supply with fans. Lamp assembly looks like a big heat sink. Comes with small top lamp fan back Slide # 3

4 Flexible Service Policy blocks or boards Chassis (OPT/TV unit) Lamp unit 1. blocks OR Main Bd. RF amp Power Bd. Lamp unit 2. boards Tuner Bd. Power Bd. Rear Jack Bd. Slide # 4

5 Flexible Service Policy boards Parts Available: 1. Front & Rear Fans 2. Lamp Power Supply 3. Lamp Assembly with Lamp Fan 4. Main Board with Light Engine & Optics fan 5. Rear (Jack) Board 6. Power Supply Board 7. Tuner board Not Shown (front panel location): 8. Front Jack Bd. 9. SD / HDMI board 10. Power Button Bd. W IR receiver Main bd. Chassis Rear Easiest to remove hardest Accessibility Ease: a) Tuner Bd. b) Lamp Pwr Bd. c) Rear Panel Bd. d) Lamp Assembly e) TV Pwr Supply Bd f) Main Bd w optics Slide # 5

6 Chassis Pull Chassis Removal 1. Remove the Back cover (shown removed) 2. The support shields are sharp. Pull the right support shield (top) toward you to remove. Set aside the support shield. 3. Remove 2 top screws, 2 bottom screws (401& 478). 4. Unplug 5 cables shown (CN4501, CN8201, CN3502, & CN6003). 5. Slide out the entire Chassis. 2 Chassis Installation The chassis will NOT go all the way in (last ½ ) if the chassis is not in the channels shown. Slide # 6

7 Light Engine Removal (group D): 1. Remove the Rear Board 2. Remove the PS & Tuner bds. 3. Slide the L Engine away from the Lamp Block. Access (groups A - D) Boards are accessed in 3 groups shown below. Light Engine pull requires groups 2 & 3 to be removed first. Rear Board group B Lamp Group A Lamp PS (top) Lamp Assembly w small rear fan Power Supply / Tuner Bd group C Slide # 7

8 Access lamp group A Lamp Group A Lamp Group A removal overview: 1. Unplug 5 cables (not shown). 2. Remove the 8 screws that hold the fan frame + top lamp power supply (shown in the next detail pages) & lift out. 3. Remove 6 bottom screws and lift the lamp assembly out. 4. Remove the side & bottom shields from the lamp. The lamp is the heat sink assembly. Lamp assembly part Right shield Slide # 8

9 Lamp Removal Details 1/3 1) Remove 8 screws. 2) Then, Remove the Fan Frame with the Fans and RF amp Power PCB together. the Fan Frame Slide # 9

10 Lamp Removal Details 2/3 3) Remove 6 screws. Then, slide out the Lamp ass y. Lamp ass y Slide # 10

11 Lamp Removal Details 3/3 Lamp unit 4) Then, remove the 4 Plates from Lamp ass y.(11 screws) Lamp Assembly Slide # 11 Lamp unit

12 Light Engine Removal (group D): 1. Remove the Rear Board 2. Remove the PS & Tuner bds. 3. Slide the L Engine away from the Lamp Block. Access (groups A - D) Boards are accessed in 3 groups (A-C) shown below. Light Engine pull requires groups B & C to be removed first. Rear Board group B Lamp Group A Lamp PS (top) Lamp Assembly w small rear fan Power Supply / Tuner Bd group C Slide # 12

13 Access Rear Board group B Rear Board group B Rear Board removal: 1. Lift off the black rear jack panel, after removing the 6 screws (452 are machine & 402 are self tapping). 2. Remove 5 screws around the perimeter of the rear board. 3. Remove 4 connectors shown below. 4. Pull the board down to unplug (from CN3501. Slide # 13

14 Access Tuner & Power Bds. group C Tuner Bd & Power Supply group C Tuner & Power Bd. removal: 1. Remove 3 screws on the tuner bd & lift off. 2. Remove 4 screws from around the power supply board. A right angle or stubby screwdriver will be handy. 3. The 5 th power supply board screw can be accessed after you remove the rear jack board. 4. Alternate procedure If you are unable to remove the 5 screws because of the angle, slide out the entire PS assembly after removing a front and a top chassis screw, as shown below. 4. PS top ch screw PS Bd. 4 rd screw Slide # 14 PS Bd 5 th screw 4. PS front ch screw

15 Access Main Bd. & Light Engine group D The Main Bd & Light Eng are removed after removing the Rear board (group B) and the Tuner board (group C). Main Bd & L Eng (group D) Tuner Bd (group C) Rear Board (group B) Main Bd. & Light Engine removal (overview): 1. Remove 3 screws on the tuner bd & lift off. 2. Remove the rear jack board (11 screws). 3. At the top remove the main board (7 screws) 4. At the base, remove the screws that hold the black optical unit. The Main board and Optical unit are replaced together (matched). If they are replaced separately WB, brightness, position data in the S/M must be adjusted. Slide # Refer to the service manual for optics removal details.

16 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 16 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

17 Layout Rear View Slide # 17

18 Layout Top View Slide # 18

19 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 19 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

20 Power On Sequence Panasonic PT-xxLCX7/70, LCZ7/70 LIFI series Sec Power On Sequence Press Power Button Both Relays click Rear Optical Output LED turns on (red) Power LED blinks green 1 Fan comes on 3 more fans come on (0.3 Amps AC) TV Micro Communications (Data) to the lamp Lamp-On command (+ 5V) to the lamp Lamp turns on (2.3 AC amps) Lamp Light is detected and Data is sent from the Lamp micro to the TV micro as proof TV micro unmutes the Video & Audio (at lamp light detection) Power LED changes from blinking to solid green Plug In No TV relays or response at plug-in Sec Power Off Sequence 0 Press Power Button (2.3A ac) 1 Micro mutes audio and video 1 Grn Power LED changes to blinking red 12 Lamp turns Off (0.3Amps AC) 31 All 4 Fans turn off 31 Relays click Off (lamp fans now off)

21 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 21 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

22 Dead Set (No Start Up) Symptom: Dead set. No Relays click. No Fans. No error codes. Cause: There is no standby voltage getting to the microprocessor. 3. Replace the main board if the standby voltage is present. Slide # 22 Suspect: Pwr Bd, Main Bd (light eng). Troubleshooting: 1. Check the thermal fuse on the lamp assembly for 0 ohms. 2. Replace the power supply board if there is no Standby 7Vdc at CN1101/pin 5 (main board).

23 Pwr LED blinks green continuously (No Start Up) Symptom: Relays click. Fans rotate. No Audio. Dark screen. Power LED continuously blinks green. Cause: There is no AC (stop) detection voltage getting to Micro IC6004. Also see Orange blinks 9X. Suspect: Pwr Bd, Main Bd (light eng), thermal fuse. Troubleshooting: Unplug CN1101 from the main board. Keep the TV off but plugged into AC. If the plug s (not the connector) CN1101/pin 6 measures 1.5Vdc or less, replace the power supply board. If the voltage is higher than 2Vdc (normal), replace the main board w optics. Slide # 23

24 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 24 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

25 Error Code Summary Indication Cause Problem areas Stored code Org Pwr 1X, 3X, 4X Excessive / Voltage loss Main PS or Main board. Pwr 01, 03, or 04. Org Pwr 2X DTV +9V loss, thermal fuse Thermal fuse, Power supply, Rear Bd. Or the Main bd. Org Pwr 6X Audio Output Main bd or unstable PS +18Vdc (CN1101/pin 1) Pwr 02 Pwr 06 Org Pwr 7X, 9X Communications loss Main board or power supply Pwr 07, 09 Org Pwr 10X +17Vdc Loss Main board or power supply Pwr 0A Red Lamp 2X, 3X, 13X No lamp Main PS, Lamp PS, Lamp, Main Bd Red Lamp 4X Lamp Temp Blocked ventilation, Lamp, Main board. Lamp 02, 03, or 0D Lamp 04 Red Lamp 5X No lamp communication Main PS, Lamp PS, Main Bd. Lamp 05 Red Lamp 8X 9X, 10X, or 11X Slide # 25 No fan detected Lamp (8X), Opt (9X), Front fan (10X), or rear (11X) Red Lamp 12X Rear Jack Board N/C Rear Bd Main Bd CN3501/pin 29 is not making good contact. Reset the blinking error codes at shutdown by unplugging the TV from AC. Lamp 08, 09, 0A, or 0B 0C

26 Orange LED blinks 1X, 3X, 4X (voltage loss) Symptom: Relays click. Fans come on briefly. Shutdown. Relays click off. Pwr LED blinks orange. Cause: Low or excessive supply voltage from the Main board or TV Power supply board or def lamp assembly. 9V CN1101 Sub 5V 3 CN6005 Lamp Block Suspect: TV Pwr Bd, Main Bd (light eng), or the lamp block,. Troubleshooting: 1. Measure the voltage at CN1101/pin 10 at power on. a) Low? Replace the power supply board. b) High? Replace both the power supply and Main boards (possible damage to the main bd.) c) Normal? Replace the Main board. Slide # 26

27 Orange LED blinks 2X (DT +9V loss) Symptom: Relays may click. No Fans rotate. Cause: 1) Open Thermal fuse. 2) Loss of DT+9V from the power supply, 3) The entire main power supply is not working. Suspect: TV Pwr Supply Bd, Main Bd (w optics), or thermal fuse. Troubleshooting: 1. Check the thermal fuse on the lamp assembly for 0 ohms. 2. Replace just the main board if DT9V is present at CN1101/pin Replace both the PS & Main bd. if there is voltage at CN1101/pin 1 and not at pin 10. Slide # 27

28 Orange LED blinks 6X (audio output) Symptom: Relays may click when the power button is pressed. Fans come on before shutdown. Cause: Defective audio output IC on the main board or excessive supply voltage. Suspect: Pwr Supply Bd, or Main Bd + light engine. Troubleshooting: 1. Monitor the DC voltage at CN1101pin 1. a) Normal? Replace the Main board with optics. b) Voltage is high? Replace the power supply board. c) Unstable? Monitor CN1101/pin 10 voltage. If this voltage is also unstable, replace the power supply board. If stable, replace the main board light engine that is loading down the 18V power supply line. Slide # 28

29 Orange LED blinks 7X or 9X (No Communications) Symptom: Power LED blinks Green for 3 mins. Fans rotate. No A/V. No lamp. Unit finally shuts down and shows error code = Orange LED blinks 7 or 9 times. Cause: 1) Communications loss from an I 2 C ICs including the lamp assembly micro (via CN6005/p7) or 2) No Lamp-On signal (CN6005/pin 2) causes no CN6005/pin 7 reply communications. Suspect: Main Bd. + Light Engine, or the Lamp assembly. Troubleshooting: Unplug the main board connector CN6005 (to the lamp assembly) and power on the TV. a) If the unit still blinks 7X or 9X, replace the Main board with optics. b) If the other (lamp) LED blinks Red 5X, (no lamp communications), replace the Lamp Assembly (the main board is responding correctly to no CN6005). Reply data from lamp assembly CN Lamp-On = 5V to lamp assembly Slide # 29

30 Orange LED blinks 10X (+17V loss) Symptom: Power LED begins to blink green then changes to 10 blinks orange. No A/V.No lamp. No Fans. Cause: +17Vdc from the power supply is missing. Suspect: Power supply board or the Main board - Light Engine Troubleshooting: Measure the voltage at CN1101/pin 9 at power on. a) Present? Replace the Main board with optics. b) Missing? Unplug the TV and CN1101. Check for a short from the main board connector CN1101/pin 9 to cold ground. Normally the resistance at CN1101/pin 9 is more than 2K ohms on the 2K ohm DVM range (actually 56k ohms). If the resistance is lower than 2k ohms, replace the light engine and power supply board. If the resistance is higher than 2k, replace the power supply board. Slide # 30

31 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 31 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

32 Lamp Mis-operation (troubleshooting clues) 1. Normally at power on, 3 signals appear at the lamp: a) +26Vdc, b) Lamp-On +5V (CN6005/2), and c) Communications (data). Then within 10 seconds the lamp lights. [Sub 5 is unnecessary] 2. The lamp assembly only needs + 5Vdc (lamp-on) and + 26Vdc (power supply) to light. 3. Communications is not necessary to keep the + 5Vdc Lamp-On signal high (lamp lit). 4. The Lamp-On signal will remain high or cycle high and low before shutdown, depending upon communications presence: c) Defect Scenario 3 - If NO communications enters the lamp assembly, the lamp outputs no communications. [If you do not see data into the lamp, expect no data output.] (error code = Red 5X no lamp communications). Slide # 32 Normal Lamp operation / or no communications 5V Lamp on 0V Lamp start Lamp-On signal (CN6005/pin 2) Lamp Off No Lamp Light operation w data communications 22 sec 28 sec Lamp ON a) Defect Scenario 1 NO lamp light - If no lamp light is detected inside the lamp assembly, data communications returned to the TV micro causes the Lamp-On output signal (CN6005/2) to repeatedly go low and high (3X). If still no lamp ignition is detected, the TV shuts down with an error code (red 2X no lamp light). b) Defect Scenario 2 - If NO communications is returned to the micro (from the lamp), the micro continues the Lamp- On signal (CN6005/2 = 5V) and the TV remains on with sound and picture. [Unplugging CN6005 produces error code = Red 5X no lamp communications.] 22 sec 22 sec 28 sec Lamp Off / TV Off

33 Red LED blinks 2X, 3X, or 13X (no lamp) Symptom: TV shuts down with an error code. 2X = No light detected; 3X = Defective internal lamp assembly Temp sensor; 13X = Input +26Vdc Low (at CN151 red). Cause: Missing 26Vdc; missing CN6005/pin 2 voltage (comm); or internal lamp assembly defect (no light). Suspect: Power supply board, Main Bd. (+ Light Engine), Lamp Pwr Supply, & Lamp Assembly. Troubleshooting: 1. Replace the Lamp s RF Amp Power Supply if there is no +26Vdc out at CN151 but there is 120Vac input at CN1 at power on. You may want to disconnect the lamp load by unplugging CN151 & rechecking for +26V. 2. Press pwr on. Replace the lamp assembly if these 2 voltages are both present at power on: a) +26Vdc at CN151, red wire b) +5Vdc at CN6005/pin 2, or c) if the TV draws approx Vac but no light. [2.1A ac means +26V & +5V are OK] You can also use a lamp test method described in slide If 5V at CN6005/pin 2 is missing at power on, replace the main board. Slide # 33

34 Quick Lamp Checks Take the back panel off the TV to access the 2 connectors, then use methods 1, 2, or 3 to check the lamp. 1. Turn the TV on. Check Method 1 (need AC ammeter) If the TV draws AC amps at power on, yet the lamp does not light, replace the lamp assembly. {The lamp assembly is instructed to turn on because it draws the correct current, but fails to ignite.) Clamp on ammeter TV AC Check Method 3 (need wire) 2. Check for +26Vdc at CN151/red wire to chassis gnd. 3. Check for 5Vdc at CN6005/pin 3 (Sub pwr on). 4. Connect CN6005 / pins 2 (lamp-on) and pin 3 together (use a wire strand or resistor lead as a jumper) Lamp PS 5. Replace the lamp if it does not turn on within 5 seconds. Check Method 2 (need 100k 1/4W) 1. Turn the TV off. 2. Unplug CN Connect a 100k ohm 1/4W resistor between the CN6005 plug, pin 2 and CN151/any red wire (as shown in the picture below). 4. Press the TV s power on button. 5. Check for +26Vdc (lamp power) at CN151/red wire to chassis gnd. [No 26V? Unplug lamp (CN151) & check again.] 6. Replace the lamp if it does not light 5 seconds after the TV power relay clicks on and the +26Vdc is present. CN6005 Red wire = pin 1 Plug from CN6005/ Pin 2 100k 1/4w CN151 Main Bd. Lamp fan CN151 Slide # 34 CN (red wire = pin 1) 2 Short pins 2 & 3 together with a 3 wire strand. Plug it back into CN6005 and turn on the TV for the lamp to come on. 7 Lamp assembly CN6005/pin 2 plug. 2Vdc 100k +26Vdc at CN151

35 Lamp Glow Using method 2 CN6005 plug CN6005 socket Slide # 35

36 Lamp Return Info After you prove the lamp is bad, replace the lamp and use Service bulletin # SH-B Requesting general information to be attached with the old lamp assembly. In black paint on the lamp assembly Slide # 36

37 Red LED blinks 4X (Lamp temp 1/2) Symptom: TV shuts down when it gets very hot. Red Lamp LED blinks 4X Cause: Lamp assembly sensors detect that the assembly / TV is too hot. See Layout for the thermal fuse location. Rear Bd. Suspect: Light Engine (main board), or the Lamp Assembly, or blocked ventilation. Fan conn Layout Troubleshooting: 1. Press pwr on. If +26Vdc is high at CN151 (red wires), replace the lamp (RF Amp) power supply. 2. Measure the temperature of the lamp assembly heat sink (at the thermal fuse see layout diagram). a) Heat sink temp is about 132 degrees F or less (normal) before shutdown? Remove wire CN6005/pin 7 from the plug and plug CN6005 back into the connector. Turn on the TV. Repeat. If the TV shuts down at the same time and blinks 4X, replace the Main board with the light engine. If the TV remains on while blinking 5X, replace the Lamp unit. b) Heat Sink temp high? Fans slow? Check for 8Vdc fan run voltage at the 4 rear board fan connectors, pin 3. Slide # 37

38 Red LED blinks 4X (lamp temp 2/2) Symptom: TV shuts down when it gets very hot. Red Lamp LED blinks 4X Cause: Lamp assembly sensors detect that the assembly / TV is too hot. 3. If the lamp assembly temperature rises to shutdown level because the TV is enclosed, check for the owner s manual s cautions. 4. If there are prior glass fragments under the lamp assembly (heat sink), also check for enclosure restriction & ventilation. Suspect: Light Engine (main board), or the Lamp Assembly, or blocked ventilation. Troubleshooting: 1. Press pwr on. If +26Vdc is high at CN151 (red wires), replace the lamp (RF Amp) power supply. 2. Measure the temperature of the lamp assembly heat sink (at the thermal fuse see layout diagram). a) Heat sink temp is about 132 degrees F or less (normal) before shutdown? Remove wire CN6005/pin 7 from the plug and plug CN6005 back into the connector. Turn on the TV. Repeat. If the TV shuts down at the same time and blinks 4X, replace the Main board with the light engine. If the TV remains on while blinking 5X, replace the Lamp unit. b) Heat Sink temp high? Fans slow? Check for 8Vdc fan run voltage at the 4 rear board fan connectors, pin 3. Slide # 38

39 Red LED blinks, 5X (no lamp communications) Symptom: Fans turn. Audio OK. Picture may be normal brightness or the screen is Dark (No lamp lit). Cause: 1) No communications between the TV micro and the Lamp block micro, or 2) +26Vdc is missing from CN151, or 3) Lamp assembly is bad (communications defect). Suspect: Power supply board, Main Bd. + Light Engine, Lamp Block, or RFamp Pwr Supply. Troubleshooting: 1. Replace the lamp power supply (RF Amp Pwr Supply) of + 26Vdc is not present at CN151/red wire and 120Vac is input the board at CN1. 2. If data is present at CN6005/pin 7, replace the Main board w optics. Use a DVM set to AC scale to measure the data at power on. 3. If the signal at CN6005/pin 1 is present at power on, replace the Lamp Assembly. If there is No data at CN6005/pin 1, replace the Main board. CN6005/pin 1 data is difficult to see on a DVM. Slide # 39

40 Red LED blinks 8X, 9X, 10X, or 11X (no fan) Symptom: TV power on but shuts down. Lamp LED blinks 8, 9, 10, or 11 times Cause: A fan rotation has not been detected. +3.3V R CN3500 / CN Vdc 8X = CN2753 9X = CN X = CN X = CN X 11X 9X 8X Suspect: One of the 4 fans, Rear Jack Board or the Light Engine (with Main Bd.) Troubleshooting: 1. Replace the fan that is not spinning, if there is at least 5Vdc (fan supply voltage) at pin 1 of the dead fan. 2. Measure the voltage at pin 3 of each fan connector (CN2751-4). If one is not 0Vdc, replace that fan even if it is spinning. The Opt Fan (CN2754) is part of the light engine. 3. If all pin 3 s are 0Vdc (normal), change the Main board if CN3501/pin 29 is 2.8Vdc or higher. If lower than 2.8Vdc replace the Rear board. Slide # 40

41 Red LED blinks 12X (no board connection) Symptom: TV power on but shuts down. Lamp LED blinks 8, 9, 10, or 11 times Cause: A fan rotation has not been detected. +3.3V R CN3500 / CN Vdc 8X = CN2753 9X = CN X = CN X = CN X 11X 9X 8X Suspect: Main Bd. And Rear Bd. Connectors are not connected or one is bad. Troubleshooting: 1. If CN3501 looks connected to the main board, measure the voltage at pin 29. Replace the rear board only if the voltage is 3.3Vdc. Replace the main board if the voltage is 2.8Vdc (normal) or 0Vdc. Before replacing a board, check the connectors (CN3500 & CN3501) on both boards for bent pins. Slide # 41

42 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 42 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

43 3 Service Modes What can they do for me? 3 Service Modes 1. Self Check S/M Error Codes Communication Resets TV 2. Main Service Mode Adjust WB Adj Option RM-Set SRV Tool MMD CHK 3. Diagnostic Screen Functions: - Lists all errors that have occurred since reset - Initial I 2 C communications between micro to ICs. - Resets to Out of Box TV customer settings. Functions: - Contrast level adjustment & Max bright number - Manual White Balance Adjustments - Lamp time (not adjustable) - Remote Control Channel set - SOS history (in PTCT row), TV hours. (press 2 then press MUTE to view) - Video Patterns press 2 to enter 4 to return. Functions: Shown in slide 36 - TV Digital Channel Strength (SNR) & Freq. Slide # 43

44 Service Mode 1 Entry & Navigation Hint: Hold the remote in your left hand. The IR sensor is at the TV left. Tuner software # Communication 1a. Self Check Service Mode Entry Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and the remote s OK button for 5 seconds. Exit Unplug the TV power from AC. 1b. Self Check Service Mode with TV Reset at exit Entry Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and the remote s MENU button for 5 seconds. Exit Unplug the TV power from AC exits and the error codes clear / erase. All Error codes since last erasure (clear) Slide # 44

45 1=fwd 2 =rev main sub Service Mode 2 Entry & Navigation Hint: Hold the remote in your left hand. The IR sensor is at the TV left. 2. Main Service Mode Entry Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and press the remote s RECALL button 3 times. Service Mode 2 appears at the left. Exit Press the TV power OFF button on the TV or remote. Navigation - Use the following remote buttons: 1 = Main menu Fwd, 2 = Main menu Rev; 3 = Sub menu Fwd, 4 = Sub menu Rev Vol up / dwn = data change a) Press remote buttons 1 or 2 to get to SRV - TOOL SOS = Stored Error Codes Power LED blinks 4 times Lamp LED blinks 11 times PTCT :P04.L0b. L0b.P04.L0b Latest SOS Previous SOS The SOS before previous The 2nd & 1 st SOS after shipment /last self check Slide # 45

46 1=fwd Service Mode 2 - Service Patterns Hint: Hold the remote in your left hand. The IR sensor is at the TV left. 2 =rev a) Press buttons 1 or 2 to get to MMD - CHK b) Press 3 to change patterns and 4 to return TV Video flow inputs Rear Bd. Tuner bd. c) These Patterns and the TV menu are inserted into the video chain at the main board (see below). Main Bd menu / patterns Light Eng. Pix Slide # 46

47 3. Diagnostic Screen Mode Service Mode 3 Entry & Navigation Entry Turn the TV ON and tune to a digital channel. With the remote in your left hand, hold the Volume UP button. An OSD bar will appear & increase. While the remote Vol up button is pressed, Press the front panel Volume UP button. The bar will stop increasing and vanish if both buttons are recognized. The diagnostic screen appears after 5 seconds. Exit Press the remote s EXIT button. Digital TV Station Info Hint: Hold the remote in your left hand. The IR sensor is at the TV left. Display CH # (FCC CH #) Signal strength Slide # 47

48 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 48 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

49 After Light Engine Replacement 1/3 When the Light Engine / TV block is replaced: 1. Straighten the picture (check) 2. Adjust mechanical focus (necessary) 1. Straighten the Picture a) In the following steps you will open the service mode to generate the position pattern. 1) Turn the TV ON. With no OSD, place the remote in your left hand. Hold the front panel Volume DWN button and press remote s RECALL button 3 times quickly for the Main S/M. 2) On the remote, press the #2 button to get into the MMD-Check selection. 3) On the remote, press the #3 button to get a position pattern. button # 2 button # 3 1) Main Service Mode 2) MMD-CHK selection 3) Position Pattern Slide # 49 LCD

50 After Light Engine Replacement 2/3 1. Straighten the Picture 1) b) From the front of the TV, remove the front cover to access the projection lens. 1) Remove 2 screws from the back of the set (#401). 3)Pry slot Lens compartment 2) Remove 1 black screw (#454) from the front of the set. 3) With a ½ blade screwdriver, working from the bottom, pry the left front cover outward and work across to the right. 4) Pull the front cover down and out. 2) and down 3)Pry slot 401 Front Cover p/n = 50 TV = LSYF TV = LSYF TV = LSYF 0613 Cover Installation hints: 1. Place the front cover in place. 2. Push the front cover flat against the TV and slide up to lock. screen up Slide # 50 LCD

51 After Light Engine Replacement 3/3 1. Straighten the Picture c) Inside the lens compartment (with the front cover removed), locate 4 screws that hold the lens positioned and loosen the screws (about 6 turns). d) Twist the projection lens to center and straighten the bottom of the picture. 2. Adjust Mechanical Focus a) In the same front lens compartment area at the right of the lens, loosen the focus screw. b) Move the screw up or down to focus the picture at the center. c) Tighten. d) Reassemble the front cover. Projection lens bezel 1. Centering Icons Focus Adj 1. Lens compartment Bezel center Position pattern Slide # 51 LCD

52 Contents Panasonic PT-xxLCX70 LIFI series LCD PTV Repair New Lamp Technology 3 Flexible Repair Policy 4 Access Chassis Removal 6 Assemblies (groups A-D) 7 Lamp Assembly Removal (group A) 8 Rear Board Removal (group B) 13 Power Supply & Tuner Bds. (C) 14 Main Bd & Light Engine (D) 15 Layout of used & unused Connectors Rear View 17 Top View 18 No TV Start Up Normal Power On Sequence 20 Dead Set 22 Power LED blinks continuously 23 TV Shuts Down Error Code Summary 25 Orange 1X, 3X, 4X (voltage loss) 26 Orange 2X (DT+9V loss / therm fuse) 27 Slide # 52 TV Shuts Down (con t) Orange 6X (Audio out) 28 Orange 7X, 9X (Communications loss) 29 Orange 10X (+17Vdc loss) 30 Lamp Mis-Operation (troubleshooting clues) 32 Red 2X, 3X, or 13X ( no lamp) 33 Quick Lamp Checks & return info 34 Red 4X (high temp) 37 Red 5X (no lamp communications) 39 Red 8X, 9X, 10X, 11X (no fan) 40 Red 12X (no rear board connection) 41 Service Mode 3 S/M What can they do for me? 43 Entry & Navigation - S/M 1 (TV Reset) 44 Entry & Navigation - S/M 2 (pattern,code) 45 Entry & Navigation - S/M 3 (D Chan SNR)47 Adjustments after Light Engine Replacement Picture Straighten 49 Mechanical Focus 51 Video Process; Audio Process 53 Useful Part numbers 55

53 Video Process Signal Levels are marked. Vac = DVM set to AC Slide # 53

54 Audio Process Slide # 54

55 OEM Remote Control TV Power Supply Bd. Useful Part Numbers PT-xxLCX 7/70 and PT-xxLCZ 7/70 series Panasonic LCD PTV Description Part Number S/M # * The p/n is dependent upon the model number letter. E.g. PT56LCX70 uses a A suffix pwr supply. N2QAYB (X models) N2QAYB (Z models) LSEP3237A * (X models) LSEP3237B * (Z models) Lamp Power Supply Bd. LSXK Rear Bd. LSEP3230A E60 Tuner Bd. LSEP3233A E70 Lamp Assembly LFS4000PA pin fine cable, Main Bd to Lamp. LSJA Thermal Fuse LSJA Large Fans (lamp assembly cooling. front or rear at CN2751 or CN2752) none E50 L6FAYYYH0053 each one 207 Small Fan (on lamp assembly) (CN2753) LSRF Opt Fan (inside light engine) (CN2754) replace light engine none Mirror 50 TV / 56 TV / 61 TV 50 LSDL p X models 1080p Z models Slide # 55

56 End LIFI series $1.5k 2k list price LIFI = LIght FIdelity Panasonic Thanks You for sharing your time with us. Contents: Service Policy Board Access No Start Up Shutdown Pwr Pwr lamp Button LED LED Service Mode Adjustments Slide # 56