Lexmark Optra C Service Manual - Page 94

5045-001 Blank Page Service Check FRU 1 Front cover back panel 2 Laser beam shutter, shutter arm 3 High-voltage cable / resistor 4 High-voltage power supply PCB, Mechanical controller PCB 5 Transfer Action Check the shutter open-close boss for damage, replace the front cover back panel if necessary. Check the shutter and the shutter arm for proper operation, replace if necessary. Check the continuity between the developing bias contact plate and the high-voltage PCB J1004-1. It should be approximately 9K ohms. Replace highvoltage cable or contact if necessary. Check the toner cartridge contact. If the problem remains, check and replace as necessary the highvoltage power supply PCB or the mechanical controller PCB. Check to ensure the transfer drum is free to move up during the print process. This can be done by manually rotating the drum lift mechanism (Asm 19-1). 2-62