Lexmark Optra S Service Manual - Page 127

4059-XXX FRU 2 Charge Roll Assembly Charge Roll Link Arm 3 HVPS Action Check the charge roll for any signs of toner buildup or other contamination on the outer edges that correspond to the bands on the page. Check the charge links and arms for proper operation, binds or incorrectly mounted counterbalance springs. Repair or replace as necessary. Check the following voltages at J10-8 on the engine board: Printer Idle J10-8 measures 0 V dc Printer Printing Test Page J10-8 voltage changes from 0 V dc to +4 V dc If the voltage does not vary, check the continuity of line J10-8 in the front cable harness. If there is no continuity, replace the cable harness. If there is continuity, replace the HVPS. If this does not correct the problem, replace the engine board. Turn the printer Off and check the resistance between J10-7 and printer ground. The resistance measures approximately 0 ohms. If incorrect, make sure the engine board is mounted correctly and securely grounded. If correct, replace the engine board. Print Quality - Residual Image Service Tip: Install a new print cartridge if available before doing this service check. Residual image can be caused by the photoconductor, cleaning blade and other parts inside the print cartridge. Residual image on model 3455 can also be caused by the charge brush contact. Diagnostic Information 2-100