Lexmark Optra C710 Service Manual - Page 144

5016-001 FRU 2 S3, S4 Interlock Switch Cables. Printhead to Engine Board Cable Action Check the cable from the interlock microswitch S3 Pin 1 (orange lead) to connector CNLS2 on the printhead and the yellow jumper from S3 Pin 2 to S4 Pin 2. Be sure these cables are connected properly and are not damaged. Be sure to note the interlock switch cable connector mounted to the left side frame. If a problem is found with any of these cables, replace the failing cable. Check the printhead to engine board cable for correct installation and damage. • If correct, check the continuity of the cable. • If incorrect, replace the cable and go to B. B 934 and 935 Error Codes FRU 1 Engine Board to Printhead Cable 2 Engine Board to Printhead Action Check the cable for damage and correct installation. Check continuity of the cable. If not correct, replace the cable. Check the following voltages: Engine board CN14 Pin # Pin 5 Pin 6 Pin 19 Signal Voltage +24 V dc +5 V dc +5 V dc Voltage +24 V dc +5 V dc +5 V dc All voltages are approximate. • If any voltage is incorrect, replace the engine board. • If voltages are correct, replace the printhead first. • If this does not fix the problem, replace the engine board. 2-78 Service Manual