Remedy: 1 Printer POR Turn the printer off and on several times. If Error Code 900 continues to display, go to step 2. 2 System board Make sure the system board is properly seated in connector J7 on the interconnect board. Turn the machine off and on several times, waiting a few minutes between power on and power off. If Error Code 900 continues to display, go to step 3. 3 Factory defaults Restore factory defaults. See “Restore EP Factory Defaults”. This resets the non-critical areas of the user NVRAM. If Error Code 900 continues to display, go to step 4. 4 Sub error codes With Error Code 900 displayed, press Select and Return. Record the complete list of Sub Error Codes on the display. Check the “Base printer sub error codes”. If none of the Sub Error Codes are listed, then call your next level of support or call Lexmark.
Code: 901
Description: Engine Flash
Remedy: Indicates that the flash which the system board code is programmed into is bad. Replace the system board.
Code: 902 ... 906
Description: 902 General Engine Software Error 903 Paperport Link Driver Error 904 Interface Violation by RIP 905 Interface Violation by Paperport Device 906 RIP Interface Driver Error
Remedy: These errors indicate an unrecoverable system software error. Replace the system board.
Code: 910 ... 914
Description: 910 DC Pick Motor DC Pick Motor Stall 911 DC Pick Motor Excessive PWM 912 DC Pick Motor below speed 913 DC Pick Motor over speed 914 DC Pick Motor: No encoder feedback
Remedy: 1 Tray x Option system board or compensator assembly or autoconnect cable Check the autoconnect cables and connectors for damage. Replace if necessary. Check the cables for continuity. If incorrect, replace the compensator assembly cable. If the cables, connectors, and connections are good, replace the FRUs in the following order: • Autocompensator assembly option • Option system board.
Code: 917
Description: Transfer Roll Indicates a problem in the transfer roll area.
Remedy: 1 Transfer roll assembly Check the transfer roll for toner buildup, surface damage to the roll, oil, or other contaminants on the surface of the roll. Replace the transfer roll as necessary. 2 Left transfer arm assembly Check the left transfer roll arm assembly to make sure it is fastened and locked in the down position. If the arm is not locked down, make sure the arm is not broken and locks into the EP frame correctly. Check the left transfer arm assembly spring for proper operation. 3 Right transfer arm assembly Check the right transfer arm assembly to make sure it is fastened and locked in the down position. If the arm is not locked down, make sure the arm is not broken and locks into the EP frame correctly. Check the right transfer arm assembly spring for proper operation. For any background problems, ensure the contact to the HVPS board is correct and that there is approximately 0 ohms resistance between the transfer roll shaft and the HVPS contact. If correct, go to “Print quality—background”. 4 HVPS—917 Error code Check the voltage at J22-3. The voltage changes from +24 V dc with the printer idle to 0 V dc when the printer runs the print test. If the voltage is incorrect, check the continuity of line J22-3 in the front cable harness to the HVPS. If there is no continuity, replace the cable harness. If there is continuity, replace the HVPS. If the problem continues, replace the system board.
Code: 920 ... 925
Description: 920 Fuser Error Indicates that the fuser is below temperature when printing. 921 Fuser Error Indicates that the fuser is below standby temperature when the printer is idle 922 Fuser Error Fuser failed to reach standby temperature 923 Fuser Error Fuser is too hot during printing or when printer is idle. 924 Fuser Error An open circuit has been detected in the Fuser Thermistor Circuit 925 Fuser Error Wrong fuser lamp installed.
Remedy: Cold fuser service check Error codes 920, 921, and 922 may display for a cold fuser failure. A 920 error caused by low line voltage can sometimes be cleared by turning the machine off and then on again. A 925 service error indicates the wrong fuser lamp is installed. Be sure the correct type of fuser lamp is installed. If the correct lamp is installed and a 925 error remains, the problem may be due to the following: • The fuser may have reached standby temperature too quickly. • The line voltage may be above the maximum rating for the printer. Note: A 920, 921 or 922 fuser error may be caused by an incorrectly mounted thermistor. 1 Fuser lamp (incorrect lamp/ 925 Service Error) Install the correct voltage and wattage lamp or fuser assembly. See “Fuser assembly removal”. If the correct fuser lamp is installed and the 925 error remains, the fuser may have reached standby temperature too quickly. Check that the line voltage is not exceeding the maximum rating for the printer. 2 Fuser lamp fuser top cover assembly Observe the lamp through the left side frame. If the lamp does not come on, do the following: • Remove the redrive assembly. • Remove the fuser assembly, disconnect the LVPS to fuser AC cable from the fuser assembly, and remove the fuser. See “Fuser assembly removal”. • Verify that the lamp is installed correctly. If correct, check the continuity of the fuser top cover assembly by verifying the lamp contacts on the right contact assembly. If incorrect, check continuity of the fuser lamp. If incorrect, replace the lamp. If correct, replace the fuser top cover assembly. 3 LVPS LVPS to fuser AC cable CAUTION: When taking measurements for AC power, observe all safety precautions. Measure the AC line voltage between the two connectors on the fuser end of the LVPS to fuser AC cable. If the voltage is incorrect, turn the power off, and remove the LVPS. Measure the AC line voltage between pins CN1-1 and CN1-3 on the board. If correct, check the continuity of the LVPS to fuser AC cable. If incorrect, replace the cable. If the AC line voltage at CN1 is incorrect, check fuse F2. If the fuse is blown, replace the fuse. If the fuse is not blown, replace the LVPS assembly. 4 Fuser top cover assembly (assembly includes thermistor and thermal fuses) Disconnect the thermistor cable from the fuser control board at J6. Resistance: • HOT J2-1–J2-2 <10K ohms • COLD approximately 450K ohms If the resistance is incorrect, replace the fuser top cover assembly. If the resistance is correct, check each pin of J6 to ground. If there is continuity, replace the fuser cover assembly. See “Fuser cover removal”. Hot fuser service check Error Code 923: Indicates the fuser is too hot during printing or when the printer is idle. Error code 924: Indicates an open circuit has been detected in the fuser thermistor circuit. Note: Check the fuser sub error codes to help diagnose between a 923 and 924 error. 1 Fuser cover assembly (assembly includes thermistor and thermal fuses) Check for damage to the thermistor assembly. If damage is found, replace the fuser top cover assembly. If no damage is found, check the resistance of the thermistor between pins J6-1 and J6-2 on the cable. • HOT < 10K ohms • COLD = approximately 450K ohms If the resistance is incorrect, replace the fuser top cover assembly. If the resistance is correct, check each pin of J6 to ground. If there is continuity, replace the fuser cover assembly. See “Fuser cover removal”. 2 Fuser assembly Check for continuity between J6-1 and J1-2 and between J6-2 and J1-3. If incorrect, replace the fuser assembly. If correct, go to step 3. 3 Fuser to system board DC cable Check the continuity of the cable. If incorrect, replace the cable. If correct, go to step 4. 4 System board Measure the voltage on J14-3 on the system board. The voltage should change from approximately +2.5 V dc with the thermistor cold to approximately +1.6 V dc when the thermistor is hot. If incorrect, replace the system board. If correct, go to step 5. 5 Fuser hot roll Fuser hot roll bearings Fuser backup roll bearings Fuser backup roll Fuser mechanical parts Examine the fuser assembly for signs of overheating or damage. Check the hot roll and backup roll for signs of excessive toner, label glue, labels, or other contaminants. If problems are found, replace the fuser assembly.