Description: 929.00 Toner sensor error 929.01 No home window 929.02 No sensor transition (closed) 929.03 No sensor transition (open)
Remedy: Remove the toner cartridge, and shake it Try a different toner cartridge, if possible. If the error persists, then replace the toner level sensor. See “Toner level sensor removal”.
Code: 930.xx...935.xx
Description: 930.xx Wrong printhead installed 931.xx No first hsync 932.xx Lost hsyncs 933.xx Mirror motor locked: No hsync received 935.xx Motor unable to reach operating speed
Remedy: Replace the printhead. Note: New printhead must be aligned. See “Printhead assembly electronic adjustment”. Turn the printer off. Disconnect the printhead cables from J12 and J8 on the controller board. Turn the printer on with the front door closed. On the controller board, verify +5 V dc on pin 10 at J12 and +5 V dc on pins 1, 2, and 3 at J8. Verify grounds on pins 2, 4, and 7 at J12 and on pin 4 at J8. •If voltages or grounds are incorrect, then check the controller board. See “Controller board service check” for more information. •If voltages are correct, then replace the printhead (comes with cables).
Code: 936.xx...937.00
Description: 936.xx Transport motor initial lock failure 937.00 Main transport motor lost lock
Remedy: Replace the main motor gear drive. Warning: Do not replace the operator panel and controller board at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new and replaced at the same time. Turn off the printer, and unplug the main motor cable at J19. Turn on the printer, and check for the following voltages at J19: Verify ground at pin 5 for both the card and cable. •If these voltages are correct, then check the main motor cable for continuity. - Remove the left side cover to access the connector on the motor. - If continuity exists on each wire, then replace the main motor gear drive which includes the motor. - If continuity does not exist on one or more of the wires, then call the next level of support. •If these voltages are not correct, then see “Controller board connector pin values”, or replace the controller board. See “Controller board removal”.
Code: 940.00
Description: LVPS service error
Remedy: Replace the LVPS/HVPS. LVPS portion of board Fuses that open typically indicate a faulty LVPS/HVPS. Disconnect the power cable, and open the LVPS/HVPS enough to test the switch. The switch will show continuity across the conductors with a meter when the switch is on. If the switch is good, then see “Dead machine service check” for more diagnostics. HVPS portion of board Problems with the HVPS are exhibited in the print quality. See “Networking service check” for more information.
Code: 948.xx, 949.xx
Description: Failed engine board
Remedy: Replace the controller board. Warning: Do not replace the operator panel and controller board at the same time. Each card contains the printer settings. When either of these cards is new, it obtains some of the settings from the other card. Settings are lost when both are new and replaced at the same time. POST (Power-On Self Test) Note: The printer should complete POST in approximately 30 seconds. If the printer fails to display lights or activate the drive motor, fuser, or fan, then check the following order: 1.Power to the LVPS/HVPS 2.Power from the LVPS/HVPS to the controller board 3.Cables are plugged in correctly, especially for the operator panel. The printer will not power-up without a functioning operator panel. 4.The controller board assembly. The LED adjacent to J12 will be illuminated if the card is powered and good. 5.The operator panel. See “Operator panel service check”. Verify +24 V dc input from the LVPS/HVPS. 1.Turn the printer off. 2.Disconnect the LVPS/HVPS cable from the controller board at J22. 3.Turn the printer on. 4.Verify +24 V dc on positions 6, 17, and 19 of the cable connector (LVPS/HVPS). 5.If voltage is correct, then check the continuity in the other conductors of the cable. If the cable is good, then turn the printer off, and check the connectors to the controller board. 6.Verify that pins 10, 12, 14, 16, and 18 on both the cable and the card connector are grounded. 7.If grounds are not correct on the cable, but the cable passes continuity otherwise, then check the LVPS/HVPS. 8.If the grounds are not correct on the controller board, then replace the controller board. (Check with one probe on the connector pin and the other on the card’s ground plane found at each screw head.) Controller board voltage outputs Turn the printer off, and plug the LVPS/HVPS cable into J22 of the controller board. See the wiring diagram at the end of the manual which identifies the output voltages and grounds for a good controller board. Turn the printer off before plugging or unplugging any connectors.
Code: 950.xx
Description: Mismatch between EEPROM and mirror memory Note: A new controller board or operator panel has been installed, and has not been properly prepared for this use. Install a new note. Do not install both the controller board and the operator panel at the same time without a POR in between.
Remedy: Install a new controller bored or operator panel. Warning: Do not replace the operator panel and controller board at the same time. Each card contains the printer settings. When either of these cards is new, it obtains the settings from the other card. Settings are lost when both are new and replaced at the same time. Lights If the LCD does not come on, then open the controller board cage and locate the operator panel connector at J14. Make sure the cable is properly connected to the controller board and the controller board has input voltage to it. With the printer on, verify the following without disconnecting the cable: • Pins 1, 3, 5, and 6: 3.3 v • Pin 2: 5 v • Pins 4 and 7: GND If these are approximately correct and the operator panel is not functioning, then replace the operator panel. If any are incorrect, then see “Controller board service check”. Buttons If the buttons do not respond, then replace the operator panel. There is no test or repair for the faulty switches on the operator panel.