Lexmark C 950 Service Manual
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Diagnostic information 2-231 5058-030 Go Back Previous Next 4Check the toner dispense motor assembly for proper operation. Replace the toner dispense motor. Go to “Toner dispense motor removal” on page 4-166. Does the problem remain?Go to step 5. Problem resolved 5Check the LED printhead assembly installation. Install the LED printhead assembly properly, and perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Go to step 6. Problem resolved 6Check the LED printhead assembly for connection. Is the above component properly connected?Go to step 7. Replace the connection. 7Check the developer HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the developer HVPS PCBA. Go to “Developer HVPS PCBA removal” on page 4-72. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Go to step 8. Problem resolved 8Check the transfer roll HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the transfer roll HVPS PCBA. Go to “Transfer roll HVPS PCBA removal” on page 4-178. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Go to step 9. Problem resolved 9Replace the LED printhead assembly. Go to “LED printhead removal” on page 4-99. Does the problem remain?Go to step 10. Problem resolved 10Check the upper printer engine PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” on page 4-184. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147.Problem resolved Step Check Yes No
2-232 Service Manual 5058-030 Go Back Previous Next Solid black Check the media path for foreign objects such as staples, clips, scraps of media. Step Check Yes No 1Check the four PC cartridges for proper installation. Check the PC cartridge connections. Are the PC cartridge connections free of excess wear and contamination?Go to step 2. Correct and clean contaminated pins, or replace the appropriate PC cartridge or connector. 2Check the charge roll HVPS PCBA connections. Is the above component properly connected?Go to step 3 Replace the connection. 3Replace the charge roll HVPS PCBA. Go to “Charge roll HVPS PCBA removal” on page 4-39. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Go to step 4. Problem resolved 4Check the upper printer engine PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” on page 4-184. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain?Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147.Problem resolved
Diagnostic information 2-233 5058-030 Go Back Previous Next Vertical lines and bands (process direction) StepCheckYesNo 1Check the media condition. Load new, dry, recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved 2Is the media transfer route and the media path clear of debris?Go to step 3.Remove debris or contamination. 3Check the LED beam route. Check for debris between the LED printhead assembly and the PC drum. Check the four LED printhead assembly windows for contamination. Is the LED beam route free of debris and the glass window, in the LED printhead assembly, free of contamination? Go to step 4.Remove debris or clean the LED printhead assembly window. 4Check the four PC cartridges for proper installation. Check the PC cartridge connections. Are the PC cartridge connections free of excess wear and contamination? Go to step 5.Correct and clean contaminated pins, or replace the appropriate PC cartridge or connector. 5Replace the transfer belt cleaner. Go to “Transfer belt cleaner removal” on page 4-175. Does the problem remain? Go to step 6.Problem resolved 6Check the 2nd transfer roller for contamination and wear. Is the 2nd transfer roller free of excess wear and contamination? Go to step 7.Replace the 2nd transfer roller. Go to “2nd transfer roller removal” on page 4-24. Leading edge Trailing edge
2-234 Service Manual 5058-030 Go Back Previous Next Horizontal white stripes or bands (side-to-side direction) 7Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171. Does the problem remain? Go to step 8.Problem resolved 8Check the LED printhead assembly. Replace the LED printhead assembly. Go to “LED printhead removal” on page 4-99. Does the problem remain? Go to step 9.Problem resolved 9Check the upper printer engine PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” on page 4-184. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 10.Problem resolved 10Check the RIP card PCBA for connection. Is the component properly connected? Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147. Replace the connection. StepCheckYesNo 1Check the media condition. Load new, dry, and recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved Step Check Yes No Leading edge Trailing edge
Diagnostic information 2-235 5058-030 Go Back Previous Next 2Are the media transfer route and the media path free of contamination and debris?Go to step 3.Remove debris or contamination. 3Check the PC units for proper connection. Does the problem remain? Go to step 4Problem resolved 4Check the 2nd transfer roller for contamination and wear. Is the 2nd transfer roller free of excess wear and contamination? Go to step 5.Replace the 2nd transfer roller. Go to “2nd transfer roller removal” on page 4-24. 5Replace the four developer housings and four developer carriers. Go to “Developer housing (C) removal” on page 4-48, “Developer housing (K) removal” on page 4-54, “Developer housing (M) removal” on page 4-59, “Developer housing (Y) removal” on page 4-65,and “Developer carrier removal and replacement” on page 4-45. Does the problem remain? Go to step 6.Problem resolved 6Check the developer HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the developer HVPS PCBA. Go to “Developer HVPS PCBA removal” on page 4-72,. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 7.Problem resolved 7Check the transfer roll HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the transfer roll HVPS PCBA. Go to “Transfer roll HVPS PCBA removal” on page 4-178,. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 8.Problem resolved 8Check the LED printhead. Replace the LED printhead. Go to “LED printhead removal” on page 4-99. Does the problem remain? Go to step 9.Problem resolved 9Check the upper printer engine RIP card PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147. Problem resolved Step Check Yes No
2-236 Service Manual 5058-030 Go Back Previous Next Vertical stripes (process direction) StepCheckYesNo 1Check the media condition. Load new, dry, recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved 2Are the media transfer route and the media path free of contamination or debris?Go to step 3.Remove debris or contamination. 3Check the 2nd transfer roller for contamination and wear. Is the 2nd transfer roller free of excess wear and contamination? Go to step 4.Replace the 2nd transfer roller. Go to “2nd transfer roller removal” on page 4-24. 4Check the four PC cartridges for proper installation. Check the PC cartridge connections. Are the PC cartridge connections free of excess wear and contamination? Go to step 5.Correct and clean contaminated pins, or replace the appropriate PC cartridge or connector. 5Replace the transfer belt cleaner. Go to “Transfer belt cleaner removal” on page 4-175. Does the problem remain? Go to step 6.Problem resolved 6Check the heat belt and pressure roll in the fuser assembly for scratches or defects. CAUTION: The fuser assembly might be hot. Allow the fuser assembly to cool. Remove the fuser assembly. Is there contamination or cracks on the heat belt and/or pressure roll? Replace the fuser assembly. Go to “Fuser assembly removal” on page 4-81. Go to step 7. Leading edge Trailing edge
Diagnostic information 2-237 5058-030 Go Back Previous Next Horizontal stripes (side to side direction) 7Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171. Does the problem remain? Go to step 8.Problem resolved 8Check the RIP card for proper connectivity. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Problem solved.Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147. StepCheckYesNo 1Check the media condition. Load new, dry, recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved 2Check the media transfer route. Check the media route for contamination or obstacles. Go to step 3.Remove obstacles or contamination. 3Check the four PC cartridges for proper installation. Check the PC cartridge connections. Are the PC cartridge connections free of excess wear and contamination? Go to step 4.Correct and clean contaminated pins, or replace the appropriate PC cartridge or connector. 4Check the 2nd transfer roller for contamination and wear. Is the 2nd transfer roller free of excess wear and contamination? Go to step 5.Replace the 2nd transfer roller. Go to “2nd transfer roller removal” on page 4-24. Step Check Yes No Leading edge Trailing edge
2-238 Service Manual 5058-030 Go Back Previous Next 5Replace the transfer belt cleaner. Go to “Transfer belt cleaner removal” on page 4-175. Does the problem remain? Go to step 6.Problem resolved 6Check the heat belt and pressure roll in the fuser assembly for scratches or defects. CAUTION: The fuser assembly might be hot. Allow the fuser assembly to cool. Remove the fuser assembly. Is there contamination or cracks on the heat belt and/or pressure roll? Replace the fuser assembly. Go to “Fuser assembly removal” on page 4-81. Go to step 6. 7Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171. Does the problem remain? Go to step 8.Problem resolved 8Check the transfer roll HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the transfer roll HVPS PCBA. Go to “Transfer roll HVPS PCBA removal” on page 4-178. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 9.Problem resolved 9Check the developer HVPS PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the developer HVPS PCBA. Go to “Developer HVPS PCBA removal” on page 4-72. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 10.Problem resolved 10Check the upper printer engine PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” on page 4-184. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147. Problem resolved Step Check Yes No
Diagnostic information 2-239 5058-030 Go Back Previous Next Partial lack StepCheckYesNo 1Check the media condition. Load new, dry, recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved 2Check the four toner cartridges for proper installation. Reprint the defective image. Is the image density normal? Problem solved.Replace any empty toner cartridges. 3Check the LED beam route. Check for debris between the LED printhead assembly and the PC drum. Check the four LED printhead assembly windows for contamination. Is the LED beam route free of debris and the glass window, in the LED printhead assembly, free of contamination? Go to step 4. Remove debris or clean the LED printhead assembly window. 4Check the 2nd transfer roller for contamination and wear. Is the 2nd transfer roller free of excess wear and contamination? Go to step 5.Replace the 2nd transfer roller. Go to “2nd transfer roller removal” on page 4-24. 5Replace the transfer belt cleaner. Go to “Transfer belt cleaner removal” on page 4-175. Does the problem remain? Go to step 6.Problem resolved 6Replace the transfer belt assembly. Go to “Transfer belt assembly removal” on page 4-171. Does the problem remain? Go to step 7.Problem resolved Leading edge Trailing edge
2-240 Service Manual 5058-030 Go Back Previous Next Spots 7Check the LED printhead assembly for proper installation. Install the LED printhead assembly properly, and perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Go to step 8.Problem resolved 8Check the LED printhead. Replace the LED printhead. Go to “LED printhead removal” on page 4-99. Does the problem remain? Go to step 9.Problem resolved 9Check the upper printer engine PCBA for proper connectivity. Disconnect and reconnect all appropriate cables. Replace the upper printer engine PCBA. Go to “Upper printer engine PCBA removal” on page 4-184. Perform a print test. Go to “PRINT TESTS” on page 3-22. Does the problem remain? Problem solved.Replace the RIP PCBA. Go to “RIP PCBA removal” on page 4-147. StepCheckYesNo 1Check the media condition. Load new, dry, recommended media. Reprint the defective image. Does the problem remain? Go to step 2.Problem resolved 2Check the media transfer route. Is the media route free of contamination or debris? Go to step 3.Remove debris or contamination. Step Check Yes No Leading edge Trailing edge