Lexmark C750 Service Manual - Page 126
Lexmark C750 Manual
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5060-00x 930 Error code LVPS This problem with the fuser circuits is usually the zero crossover signal from the LVPS not working correctly. Step 1 Action and questions LVPS cable-check the LVPS cable to J10 on the engine board to make sure it is seated correctly. See "Engine board" on page 5-7. Is the cable seated correctly? 2 Voltage checks-disconnect J10 from the engine board assembly. Go to "Engine board" on page 5-7. Check the voltage at J10-10, on the cable. It measures approximately +3.7 V dc. Is the voltage correct? Go to step 3 Replace the following FRUs in order: 1. LVPS. See "Low voltage power supply (LVPS) removal" on page 4-38 2. Engine board. See "Engine board removal" on page 4-29 Replace the LVPS assembly. See "Low voltage power supply (LVPS) removal" on page 4-38 Problem solved Yes Go to step 2 No Install the cable correctly 3 Is error code 930 still displayed? 2-92 Service Manual