Lexmark X 850 Owners Manual
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Diagnostic information2-193 7500-XXX Switch (ADF left cover interlock) open Toner cartridge empty Step Check Yes No 1 Check the actuator of the ADF left cover assembly. Is the above actuator present and attached properly?Go to step 2. Replace the ADF left cover assembly. Go to “ADF left cover assembly removal” on page 4-168. 2 Check the actuating lever of the switch (ADF left cover interlock). Is the above actuating lever attached and aligned properly?Go to step 3. Adjust the actuating lever for proper alignment. 3 Check the switch (ADF left cover interlock) for proper operation. Perform the switch (ADF left cover interlock) test. 1. Enter the Diagnostics Menu. 2. Touch SCANNER TESTS. 3. Touch Sensor Tests. 4. Touch ADF left cover interlock. Open and close the ADF left cover assembly. Does the display on the operator panel change every time the above switch is activated?Go to step 5. Go to step 4. 4 Check the switch (ADF left cover interlock) for connection. Is the above switch connected properly?Replace the switch (ADF left cover interlock). Go to “Switch (ADF left cover interlock) removal” on page 4-183.Replace the connections. 5 Perform a POR. Does the error remain?Replace the scanner controller card assembly. Go to “Scanner controller card assembly removal” on page 4-143.Problem solved. Step Check Yes No 1 Check remaining toner. Does the toner cartridge contain toner?Go to step 2. Replace the toner cartridge. 2 Check the toner cartridge for proper installation. Remove the toner cartridge and reinstall it. Does it operate properly?Problem solved. Go to step 3.
2-194MFP Service Manual 7500-XXX 3 Check the toner cartridge guide assembly. Remove the toner cartridge guide assembly. Does the gear, located on the lower part of the toner cartridge guide assembly, rotate smoothly?Go to step 4. Replace toner cartridge guide assembly. 4 Check the pipe, located on the lower part of the toner cartridge for debris. Is the pipe, located on the lower part of the toner cartridge guide assembly, clogged?Go to step 5. Clean the pipe. 5 Check the sensor (RFID toner cartridge) for proper installation.Go to step 6. Install the sensor (RFID toner cartridge) correctly. 6 Check the sensor (RFID toner cartridge) for proper connection.Replace the sensor (RFID toner cartridge). Go to “Toner cartridge guide assembly removal” on page 4-95Replace the connection. 7 Check the toner add motor assembly for operation. Warning: Only perform this test in segments of three seconds or less, or toner spill will occur. Remove the top cover assembly. Go to “Top cover assembly removal” on page 4-5. Override the switch (printer front door interlock) 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Printer Motor Test. 4. Touch Toner add motor. Observe the toner add motor for rotation. Note: When performing this test, the drum unit motor will also operate. Does the motor rotate normally?Go to step 9. Go to step 8. 8 Check the toner add motor assembly connection. Is the toner add motor assembly properly connected?Replace the toner add motor. “Toner cartridge guide assembly removal” on page 4-95.Replace the connection. 9 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No
Diagnostic information2-195 7500-XXX Toner cartridge near empty Toner cartridge failure Step Check Yes No 1 Does the toner cartridge contain toner? Go to step 2. Replace the toner cartridge. 2 Check the toner cartridge for proper installation. Remove the toner cartridge and reinstall it. Does it install properly?Problem solved Go to step 3. 3 Check the gear rotation in the toner cartridge guide assembly. Remove the toner cartridge guide assembly. Does the gear, located at the lower part of the toner cartridge guide assembly, rotate smoothly?Go to step 4. Replace the toner guide assembly. 4 Check the toner cartridge guide assembly for pipe clogging. Is the pipe, located at the lower part of the toner cartridge guide assembly, clogged?Go to step 5. Clean the pipe. 5 Check the toner add motor assembly for operation. Warning: Only perform this test in segments of three seconds or less or toner spill will occur. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Printer Motor Test. 4. Touch Toner add motor. Does the motor rotate normally?Go to step 7. Go to step 6. 6 Check the toner add motor assembly connection. Is the toner add motor assembly properly connected?Replace the toner add motor assembly. Go to “Toner add motor assembly removal” on page 4-97.Replace the connection. 7 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Check the toner cartridge installation. Is the correct toner cartridge properly installed?Go to step 2. Install the correct toner cartridge properly. 2 Checking the sensor (RFID toner cartridge) for proper installation. Is the sensor (RFID toner cartridge) installed correctly?Go to step 3. Install the sensor (RFID toner cartridge) correctly.
2-196MFP Service Manual 7500-XXX Toner cartridge RFID failure Toner cartridge set failure 3 Checking the sensor (RFID toner cartridge) connection. Is the sensor (RFID toner cartridge) properly connected? Replace the sensor (RFID toner cartridge). Replace the connection. 4 • Perform a print test. • Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Check the toner cartridge installation. Is the toner cartridge properly installed?Go to step 2. Install the toner cartridge properly. 2 Check the sensor (RFID toner cartridge) installation. Is the sensor (RFID toner cartridge) properly installed?Go to step 3. Install the sensor (RFID toner cartridge) correctly. 3 Check the sensor (RFID toner cartridge) connection. Is the sensor (RFID toner cartridge) properly connected? Replace the sensor (RFID toner cartridge). Replace the connection. 4 • Perform a print test. • Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Checking the toner cartridge for correct installation. Open the printer front door assembly. Is the toner cartridge installed properly?Go to step 2. Reinstall the toner cartridge properly. Go to Go to “Toner cartridge guide assembly removal” on page 4-95. 2 Checking the toner cartridge. Is the toner cartridge damaged?Replace the toner cartridge. Go to “Toner cartridge guide assembly removal” on page 4-95.Go to step 3. Step Check Yes No
Diagnostic information2-197 7500-XXX Tray 1 media size failure 3 Checking the toner cartridge guide assembly. Remove the top cover assembly. Is the toner cartridge guide assembly damaged?Replace the toner cartridge. Go to “Toner cartridge guide assembly removal” on page 4-95.Go to step 4. 4 Checking the sensor (RFID toner cartridge). Is the above sensor attached and connected properly?Replace the sensor (RFID toner cartridge).Go to step 5. 5 Perform a print test. Does the error still occur?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Check the media. Pull out media tray 1 to visually check it. Is media loaded in media tray 1 properly?Go to step 2. Load media properly. 2 Check the media. Pull out media tray 1 to visually check it. Are the front media tray guide assembly, rear media tray guide and media tray end guide of media tray 1 set correctly?Go to step 3. Set the guides properly. 3 Check the tray 1 switch (media size) for proper installation. Pull out media tray 1 to visually check it. Is the above switch installed properly?Go to step 4. Install switch (media size) for media tray 1 correctly. 4 Check the tray 1 switch (media size) connection. Is the tray 1 switch (media size) properly connected.Replace the switch (media size). Go to “Switch (media size) removal” on page 4-19.Replace the connection. 5 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No
2-198MFP Service Manual 7500-XXX Tray 2 media size failure Tray 1 media size mismatch in length Step Check Yes No 1 Check the media. Is media loaded, in media tray 2, properly? Pull out media tray 2 to visually check it. Go to step 2. Load media properly. 2 Check the media. Are the front media tray guide assembly, rear media tray guide, and media tray end guide of media tray 2 set correctly? Pull out media tray 2 to visually check it. Go to step 3. Set the guides properly. 3 Check the tray 2 switch (media size) 2 for proper installation. Pull out media tray 2 to visually check it. Is the above switch installed properly?Go to step 4. Install the tray 2 switch (media size) correctly. 4 Check the tray 2 switch (media size) connection. Is the tray 2 switch (media size) properly connected?Replace the switch (media size). “Switch (media size) removal” on page 4-19.Replace the connection. 5 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Check the media. Pull out media tray 1 to visually check it. Is media properly loaded in media tray 1?Go to step 2. Load media properly. 2 Check the media. Pull out media tray 1 to visually check it. Are the front media tray guide assembly, rear media tray guide, and media tray end guide of media tray 1 set correctly?Go to step 3. Set the guides properly. 3 Check the switch (media size) in media tray 1 for proper installation. Pull out media tray 1 to visually check it Is the switch (media size) in media tray 1 installed correctly?Go to step 4. Install the switch (media size) for media tray 1 correctly. 4 Check the switch (media size) in tray 1 connection. Is the switch (media size) in tray 1 properly connected?Replace the switch (media size).Replace the connection.
Diagnostic information2-199 7500-XXX 5 Check the roll for tray 1. Pull out tray 1 and check it. Is the feed roll, separation roll, and pick roll free of excess wear and contamination?Go to step 6. Clean or replace the feed roll, separation roll, and pick roll. 6 Check the media position. Open the printer left door assembly and visually check it. Does the media touch the sensor (registration)?Remove the media.Go to step 7. 7 Check the roll. Open the printer left door assembly, and check it. Is the transport roll assembly free of excess wear and contamination?Go to step 8. Clean or replace the transport roll assembly. Go to “Transfer roll guide assembly removal” on page 4-77. 8 Check the roll. Open the printer left door assembly, and check it. Is the registration roll assembly free of excess wear and contamination?Go to step 9. Clean or replace the registration roll assembly. Go to “Registration roll assembly removal” on page 4-79. 9 Check the sensor (registration) for operation. 1. Enter the Diagnostics Menu. 2. Touch BASE SENSOR TEST. 3. Touch Media Path. 4. Touch Registration. Open the printer left door assembly, and check it. Does the display on the operator panel change every time the sensor (registration) actuator is operated?Go to step 11. Go to step 9. 10 Check the sensor (registration) connection. Is the sensor (registration) properly connected?Replace the sensor (registration). Go to “Sensor (registration) removal” on page 4-81.Replace the connection. 11 Check the registration clutch for proper operation. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Printer Motor Test. 4. Touch Registrat clutch. Does the above component operate normally?Go to step 13. Go to step 12. 12 Check the registration clutch connection. Is the registration clutch properly connected?Replace the registration clutch. Go to “Registration clutch assembly removal” on page 4-80.Replace the connection. Step Check Yes No
2-200MFP Service Manual 7500-XXX Tray 2 media size mismatch in length 13 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No 1 Check the media. Pull out tray 2 to visually check it. Is media loaded in tray 2 properly?Go to step 2. Load media properly. 2 Check the media. Pull out tray 2 to visually check it. Are the front media tray guide assembly, rear media tray guide, and media tray end guide of tray 2 set correctly?Go to step 3. Set the guides properly. 3 Check the switch (media size) for tray 2 installation. Is the switch (media size) for tray 2 installed correctly? Pull out tray 2 to visually check it. Go to step 4. Install the switch (media size) for tray 2 correctly. Go to “Switch (media size) removal” on page 4-19. 4 Check the switch (media size) for tray 2 connection. Is the switch (media size) for tray 2 properly connected? Replace the switch (media size). “Switch (media size) removal” on page 4-19.Replace the connection. 5 Check the roll for tray 2. Pull out tray 2 and check it. Is the feed roll, separation roll, and pick roll free of excess wear and contamination?Go to step 6. Clean or replace the feed roll, separation roll, and pick roll. Go to “Feed roll removal” on page 4-45, “Separation roll removal” on page 4-49, and “Pick roll removal” on page 4-51. 6 Open the printer left door assembly and visually check it. Check the media position. Does the media touch the sensor (registration)?Remove the media.Go to step 7. Step Check Yes No
Diagnostic information2-201 7500-XXX 7 Check the roll. Open the printer left door assembly and check it. Is the transport roll assembly free of excess wear and contamination?Go to step 8. Clean or replace the transport roll assembly. Go to “Transfer roll assembly removal” on page 4-73. 8 Check the roll. Open the printer left door assembly and check it. Is the roll, in the registration roll assembly, free of excess wear and contamination?Go to step 9. Clean or replace the registration roll assembly. Go to “Registration roll assembly removal” on page 4-79. 9 Check the sensor (registration) for operation. 1. Enter the Diagnostics Menu. 2. Touch BASE SENSOR TEST. 3. Touch Media Path. 4. Touch Registration. Open the printer left door assembly and check it. Does the display, on the operator panel, change every time the sensor actuator is operated?Go to step 11. Go to step 10. 10 Check the sensor (registration) connection. Is the sensor (registration) properly connected?Replace the sensor (registration). Go to “Sensor (registration) removal” on page 4-81.Replace the connection. 11 Check the registration clutch for proper operation. 1. Enter the Diagnostics Menu. 2. Touch MOTOR TESTS. 3. Touch Printer Motor Test. 4. Touch Registrat clutch. Does the component make an audible clicking sound when it is operated?Go to step 13. Go to step 12. 12 Check the registration clutch connection. Is the registration clutch properly connected?Replace the registration clutch. Go to “Registration clutch assembly removal” on page 4-80.Replace the connection. 13 Perform a print test. Does the error continue?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved. Step Check Yes No
2-202MFP Service Manual 7500-XXX Tray 3 media size failure StepCheckYe sNo 1Check the media. Pull out tray 3, and visually check it. Is the media loaded in tray 3 properly?Go to step 2.Load media properly. 2Check the media. Pull out tray 3, and visually check it. Are the front media guide and rear media guide on tray 3 set correctly?Go to step 3.Set the parts properly. 3Check the switch (TTM media size) for proper installation. Pull out tray 3, and visually check it. Is the switch (TTM media size) installed properly?Go to step 4.Install the switch (TTM media size) correctly. Go to “2000-sheet dual input (TTM)– switch (TTM media size) removal” on page 4-242. 4Check the switch (TTM media size) for proper connection. Is the above switch installed correctly?Replace the switch (TTM media size). Go to “2000-sheet dual input (TTM)– switch (TTM media size) removal” on page 4-242.Replace the connection. 5Check the 2TM/TTM controller card assembly and the printer engine card assembly for proper connection. Are connectors P541 and P413 on the above cards connected properly?Go to step 6.Replace the connection. 6Perform a print test. Does the error still occur?Replace the 2TM/ TTM controller card assembly. Go to “2000-sheet dual input (TTM)– 2TM/TTM controller card assembly removal” on page 4-274. Go to step 7.Problem solved. 7Perform a print test. Does the error still occur?Replace the printer engine card assembly. Go to “Printer engine card assembly removal” on page 4-117.Problem solved.