Lexmark Optra C710 Service Manual - Page 116

5016-001 Erase Lamp Service Check Note: The erase lamp assembly is mounted on the top of the printhead assembly. FRU 1 Printhead Erase Lamp Engine Board Erase Lamp Cable Action Check the cable to be sure it is installed properly from CN14 on the engine cable to CN750 on the erase lamp assembly. If the cable is installed correctly, check the voltage on the engine board at CN14 pin 21. It should measure +24 V dc. • If incorrect, replace the engine board. • If correct, check the voltage at CN14-22 while running a print test. The voltage should change from approximately +5 V dc to 0 V dc when the erase lamps turn on and off. • If incorrect, replace the engine board. • If correct, check the cable from CN14 erase lamp assembly on the engine board to CN750 on the erase lamp assembly. • If incorrect, replace the cable. • If correct, replace the erase lamp assembly. 2-50 Service Manual