Lexmark Optra C710 Service Manual - Page 147

5016-001 All Blank Page Service Check FRU 1 Intermediate Transfer Unit (ITM) 2 Transfer Roller 3 High Voltage Contacts Grid Block 1 Grid Block 2 HVPS 4 Engine Board Printhead Cable Engine Board 5 Printhead Action An ITM unit may cause an all blank copy. Try a new ITM if available. Note: The transfer roll is spring loaded against the inner cover so that it properly contacts the transfer belt in the ITM unit. Check the transfer roll for correct installation. Be sure the transfer roll rotates freely. Check the left and right side transfer roll springs and bushings for any signs of binding or damage. Replace any parts as necessary. Check the high voltage contacts in grid blocks 1 and 2 to ensure they are clean, not bent, deformed or pitted. If incorrect, replace the failing grid block assembly. Be sure the HVPS is correctly and securely mounted to the HVPS mounting bracket and grid block assemblies. If correct, remove the HVPS and be sure the high voltage contacts align with the contacts on the HVPS. Also look for signs of pitting or damage. Check the cable for proper installation and continuity. • If the continuity is incorrect, replace the cable. • If correct, replace the engine board. The printhead may be the cause, but should only be replaced after a new toner cartridge(s) or ITM has been replaced. Diagnostic Information 2-81