Lexmark C720 Service Manual - Page 127
—Main Motor (MM) Service Check, the IOD2 P.W.B. board, DCN10 on
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5024-001 911-Main Motor (MM) Service Check FRU 1 OPC Belt Print Cartridge 2 Fuser Unit 3 Action Check the OPC belt cartridge for any rotation. If the main motor (MM) attempts to turn but the OPC belt cartridge does not, replace the OPC belt cartridge. Note: The OPC belt cartridge is a customer order supply. Check the fuser for any rotation. If the main motor (MM) attempts to turn but the fuser does not, replace the fuser unit. Note: The fuser unit is a customer order supply. If an '82 PC Missing' error is displayed, while diagnosing the main motor (MM), ensure the connector (CN1) on the main motor (MM) and connector ECN12 on the IOD2 P.W.B. board are firmly connected. Ensure the connectors ECN1, ECN2 on the IOD2 P.W.B. board, DCN10 on the IOD1 and 12CN on the main engine (MCTL P.W.B.) board are firmly connected. Replace any damaged part. Diagnostic Information 2-47
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