Lexmark T632 Service Manual - Page 112

4060-xxx Printhead service check The printhead assembly does not contain any service replaceable parts or components. If service error code 930 displays, the wrong printhead is installed in the printer. See "Printhead 1 (000/010)" on page 7-10, "Printhead 2 (200/210)" on page 7-11, or "Printhead 3 (400/410)" on page 7-12. Note: A 201 paper jam may also indicate a failing printhead. The paper may have jammed prior to or at the input sensor. Print the error log and see if 201 or 931 errors are logged. Service Error Code 1 Error code 931 No first HYSNC Signal Error Code 932 Lost HYSNC 2 Error Code 934 Mirror motor lost lock Error Code 935 Mirror motor unable to reach operating speed Explanation These errors usually indicate a failure in the HYSNC signal to the printhead. Check the continuity of the cables connected to J5 and J4 on the system board. If incorrect, replace the defective cable. The voltage at J4-1 measures approximately +5 V dc. If incorrect, replace the system board. The voltage at J5-7 measures approximately +24 V dc. If incorrect, replace the system board. If correct, replace the printhead assembly. These error codes indicate a problem with the mirror motor circuit in the printhead assembly or the mirror motor cable to the system board cable or system board assembly. Check the continuity of the mirror motor cable connected to J5 on the system board. If incorrect, replace the cable. The voltage at J5-7 measures approximately +24 V dc. If incorrect, replace the system board. If correct, replace the FRUs in the following order: • System board • Printhead assembly Print quality service check Service tip: Before troubleshooting any print quality problems do the following: • Install another print cartridge if available before proceeding with the service checks. • Use Tray 1 to test for print quality of the base printer. • Replace the charge roll if it is damaged or contaminated. • Replace the transfer roll if it is damaged or contaminated. • Make sure the fuser assembly is installed correctly. • Verify proper paper type, texture, and weight settings for the media being used. • Test the printer using plain paper (20 lb). Select the following menu settings as indicated. Be sure and note the original settings so you can return the printer to the original customer printer setup. • Print Resolution: Set to 300 dpi (print quality problems should be checked at different resolution settings). • Print Darkness: Set to NORMAL. • Toner Saver: Set to OFF. • PQET: Set to OFF. • Fuser Temperature: Set to NORMAL. • Test the printer using plain paper (20 lb). An incorrect printer driver for the installed software can cause problems. Incorrect characters could print and the copy may not fit the page correctly. 2-78 Service Manual