Service Manual
Page 148
..." on I/O board) and ground problem (you can touch negative persists, replace lead of voltmeter to metal engine controller bracket that holds I /O board? Wait until printer displays error and remove DCN5 from I /O board shield. board. Are cables DCN5 and DCN13 properly connected to I ... persists, go to step 3. 3 Ensure rear cover I /O board shield. Check for steps to step 4. 5021-0XX 994-OPC belt marker sensor service check Step Questions / actions Yes No 1 Remove photodeveloper Clean marker Go to step 3. If problem markers covered with cotton markers...
..." on I/O board) and ground problem (you can touch negative persists, replace lead of voltmeter to metal engine controller bracket that holds I /O board? Wait until printer displays error and remove DCN5 from I /O board shield. board. Are cables DCN5 and DCN13 properly connected to I ... persists, go to step 3. 3 Ensure rear cover I /O board shield. Check for steps to step 4. 5021-0XX 994-OPC belt marker sensor service check Step Questions / actions Yes No 1 Remove photodeveloper Clean marker Go to step 3. If problem markers covered with cotton markers...