Lexmark OptraImage SC 1275 Service Manual - Page 69
Lexmark OptraImage SC 1275 Manual
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Developing Motor Service Check FRU 1 Rollers, Gears Action If the developing motor (M1) starts turning when a print cycle is initiated, check the rollers and gears for overload. Check the voltage across CN15A-5 on the mechanical controller board and GND. It should change from 5 V dc to 0 V dc during a print cycle. If it does not, replace the mechanical controller board. Check the voltage across CN15A-3 on the mechanical controller board and GND. If it remains 0 V dc during a print cycle, replace the developer motor (M1). If it does not, replace the mechanical controller board. 2 Mechanical Controller Board (PWBA) • Developer Motor (M1) • Mechanical Controller Board (PWB-A) 3 Transport Motor Service Check FRU 1 Rollers, Gears Action If the transport motor (M2) starts turning when a print cycle is initiated, check the rollers and gears for overload. Check the voltage across CN15A-6 on the mechanical controller board and GND. It should change from 5 V dc to 0 V dc during a print cycle. If it does not, replace the mechanical controller board. Check the voltage across CN15A-4 on the mechanical controller board and GND. If it remains 0 V dc during a print cycle, replace the transport motor. If it does not, replace the mechanical controller board. 2 Mechanical Controller Board (PWBA) • Transport Motor (M2) • Mechanical Controller Board (PWB-A) 3 2-34