Lexmark M410 Service Manual - Page 65

4045-XXX FRU 3 High Voltage Contact 4 HVPS/HVPS Cable/ Engine Board 5 Printhead Assembly Action Check the contacts on the right side frame for damage, cartridge contact wear or contamination. If the contacts are bent or damaged, replace the contacts. Note: Inspect the HVPS contacts on the board for any signs of damage or contamination. If the voltages at J9 are incorrect, replace the engine board. If the voltages are correct, check the HVPS cable for continuity. If you measure continuity, replace the HVPS. Generally a 93x service error is posted if the printhead assembly fails and the printer does not give a blank copy symptom. The printhead used in the printer does not have a mechanical shutter as previous laser printers. The printer is interlocked through the front top cover switch. Print Quality - Random Marks Service Tip: The primary cause of random marks is due to loose material moving around inside the printer and attaching to the photoconductor, charge roll or transfer roll. Symptom 1 Random Marks Action Check the print cartridge for any signs of loose or foreign material that might be on the photoconductor. Check the transfer roll and charge roll for any pieces of material that are stuck to the rolls. Diagnostic Information 2-39