Lexmark Optra S Service Manual - Page 125
Engine Board HVPS, Printer Printing
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4059-XXX FRU 5 Engine Board HVPS Connector Action Check the following voltages at J10 on the engine board. Measure the voltages from J10 to printer ground. Printer Idle J10-1 approximately 0 V dc J10-2 approximately 4 V dc J10-4 approximately 0 V dc Printer Printing J10-1 varies 0 V dc to +5 V dc J10-2 varies 0 V dc to +4 V dc J10-4 varies 0 V dc to +1.9 V dc If J10-1 voltage is incorrect, check the continuity of the front harness cable (J10-1 line). If there is no continuity, replace the harness cable. If there is continuity, replace the HVPS. If this does not correct the problem, replace the engine board. If J10-2 voltage is incorrect or if the voltage remains at 0 V dc, check the continuity of the front harness cable (J10-2 line). If there is no continuity, replace the harness cable. If there is continuity, replace the HVPS. If this does not correct the problem, replace the engine board. If J10-4 voltage is incorrect, check the front harness cable (J10-3 line). If there is not continuity, replace the harness cable. If correct, replace the engine board. if this does not correct the problem, replace the HVPS. Diagnostic Information 2-98