Diagnostics mode To run the printer diagnostic tests described in this chapter, put the printer in Diagnostics mode. Entering Diagnostics mode To enter the Diagnostics Mode: 1. Turn off the printer. 2. Press and hold and. 3. Turn on the printer. 4. Hold the buttons about 10 seconds (until the clock face appears). Diagnostic mode menus REGISTRATION See REGISTRATION on page 3-10 Top Margin Bottom Margin Left Margin Right Margin Quick Test See Quick Test on page 3-11 ALIGNMENT See ALIGNMENT MENU on page 3-11 Cyan Yellow Magenta Factory Scanner Factory Manual Drift Sensors See Drift Sensors on page 3-12 MISC TESTS Toggle ITU See Toggle ITU on page 3-13 Belt Tracking See Belt Tracking (ITU 4th point adjustment) on page 3-13 Printhead Inst See Printhead Inst on page 3-14 PRINT TESTS See PRINT TESTS on page 3-14 Tray 1 Tray 2 (If installed) Tray 3 (if installed) Tray 4 (If installed) MP Feeder Prt Quality Pgs See Print Quality Pgs on page 3-15 Diagnostic aids 3-7
HARDWARE TESTS LCD Test See LCD Test on page 3-15 Button Test See Button Test on page 3-15 DRAM Test See DRAM Test on page 3-16 CACHE Test See CACHE Test on page 3-16 Parallel 1 Wrap (If installed) See Parallel Wrap Test on page 3-17 Serial 1 Wrap (If installed) See Serial Wrap Test on page 3-18 DUPLEX TESTS (If installed) Quick Test See Duplex Quick Test on page 3-19 Top Margin See Duplex Top Margin Offset on page 3-19 Sensor Test See Duplex Sensor Test on page 3-19 INPUT TRAY TESTS Feed Tests See Feed Test on page 3-20 Sensor Tests See Sensor Test on page 3-20 OUTPUT BIN TESTS Feed Tests See Feed Test on page 3-21 Feed To All Bins See Feed to All Bins on page 3-21 Sensor Test See Sensor Test on page 3-22 Diverter Test See Diverter Test on page 3-22 FINISHER TESTS Staple Test See Staple Test on page 3-23 Feed Test See Finisher Feed Test on page 3-23 Sensor Test See Finisher Sensor Test on page 3-23 BASE SENSOR TEST See BASE SENSOR TEST on page 3-24 DEVICE TESTS (If installed) Quick Disk Test See Quick Disk Test on page 3-25 Disk Test/Clean See Disk Test/Clean on page 3-25 Flash Test See Flash Test on page 3-25 PRINTER SETUP Defaults See Defaults on page 3-26 PAGE COUNTS See PAGE COUNTS on page 3-26 Serial Number See Serial Number on page 3-27 Engine Setting 1-4 See Engine Setting x on page 3-27 Model Name See Model Name on page 3-27 Configuration ID See Configuration ID on page 3-27 Reset Color Cal See Reset Color Calibration on page 3-28 Edge to Edge See Edge to Edge on page 3-28 Cal Ref Adj See Cal Ref Adj on page 3-28 3-8 Service Manual
EP SETUP EP Defaults See EP Defaults on page 3-28 Fuser Temp See Fuser Temp on page 3-28 DC Charge Adjust See DC Charge Adjustment on page 3-28 Dev Bias Adj See Dev Bias Adj on page 3-28 Transfer Adjust See Transfer Adjust on page 3-28 EVENT LOG Display Log See Display Log on page 3-29 Print Log See Print Log on page 3-29 Clear Log See Clear Log on page 3-30 EXIT DIAGNOSTICS Exiting the Diagnostics mode Select EXIT DIAGNOSTICS to exit the Diagnostics mode and return to normal mode. Diagnostic aids 3-9
Configuration Menu The Configuration menu contains a set of menus, settings, and operations which are infrequently used by a user. Generally, the options made available in this menu are used to configure a printer for operation. Note: An asterisk (*) in the value list in the following menus indicates the default value. Entering Config Menu To enter the Configuration Menu: 1. Turn off the printer. 2. Press and hold and. 3. Turn on the printer. 4. Hold the buttons about 10 seconds (until the clock face appears). The following are available from the Configuration Menu: Configuration Menu Reset Fuser Cnt See Reset Fuser Cnt on page 3-32 Black Only Mode See Black Only Mode on page 3-32 Prt Quality Pgs See Prt Quality Pgs on page 3-32 Color Trapping See Color Trapping on page 3-32 Tray Insert Msg See Tray Insert Msg on page 3-32 SIZE SENSING See SIZE SENSING on page 3-32 Panel Menus See Panel Menus on page 3-33 PPDS Emulation See PPDS Emulation on page 3-33 Demo Mode See Demo Mode on page 3-33 Factory Defaults See Factory Defaults on page 3-33 Energy Conserve See Energy Conserve on page 3-33 EVENT LOG See EVENT LOG on page 3-33 Auto Color Adjust See Auto Color Adjust on page 3-34 Paper Prompts See Paper Prompts on page 3-34 Env Prompts See Env Prompts on page 3-34 Font Sharpening See Font Sharpening on page 3-34 Jobs On Disk See Jobs On Disk on page 3-35 Disk Encryption See Disk Encryption on page 3-35 Exit Config Menu Exiting the Config Menu Select EXIT Config Menu to exit the Configuration menu and return to normal mode. Diagnostic aids 3-31
Reset Fuser Cnt This only displays if the Maintenance Warning and Intervention function is enabled in the printer Configuration ID. The fuser maintenance page counter is incremented when a page is printed and incremented by two when a duplex sheet is printed. The counter can be used to track printer usage. When the counter reaches 120,000 for models C78x or 200,000 for models C77x, the printer posts a fuser maintenance message on the operator panel. 1. Select Reset Fuser Cnt in the Config Menu to view the page count. 2. Press Back ( ) to return to the previous menu or press Select to reset the maintenance page counter back to zero. Black Only Mode When this setting is set to On the printer prints only grayscale printing. The default is Off. The result is similar to setting Print Mode to Black Only. Prt Quality Pgs The Print Quality Test consists of five pages. Pages one and two contain a mixture of graphics and text. The remainder of the pages only contain graphics. Use this test to identify print quality problems. The Test Pages must be printed on A4, Legal, or Letter paper. Color Trapping 1. Select Prt Quality Pgs from the Config Menu. 2. Press Select. Go to Print tests on appendix page B-1 for representative samples of the pages. Color trapping is an aid to graphics and text. When text or graphics appear over other colors, a misalignment may allow white paper to show through at the borders of the colors. Color trapping reduces the cutout area under the upper image so a slight misalignment does not show. This only affects PostScript printing. Tray Insert Msg SIZE SENSING 1. Select Color Trapping from the Config Menu. 2. Select the value or Off. The range is 1 to 5, and the default value is 2. Press to increase the value. This setting controls how long, in seconds, the tray insert message displays when a tray is inserted. The values are Disabled and 1 to 90. The default value is 5. Automatic size sensing can be disabled or enabled in this menu. Only paper sources that support Auto Size Sensing are displayed. 1. Select SIZE SENSING from the Config Menu. 2. Select a tray. Only those trays with size sensing display. One of the following is displayed: Tray 1 Sensing Tray 2 Sensing Tray 3 Sensing Tray 4 Sensing 3. Select Auto to turn size sensing on for that tray, or select Off to disable size sensing. 4. Press Back ( ) to exit. 3-32 Service Manual