Basic troubleshooting Table 7. Basic troubleshooting 64 Chapter 3 - Troubleshooting Q1342-90910 # Verification steps Possible problems Solutions 1 Does the printer turn on successfully? When the product is connected to a grounded power source, the printer motor should continuously rotate for about six seconds. Power is not being supplied to the printer. There are open wire harness connectors. There are pinched or frayed wire harness wires. The motor or ECU has failed. 1. Verify that the product is plugged in. 2. Verify that the power cable is functional and the cable is plugged into the correct power source (110 V or 220 V ac). 3. Verify that FU102 (the ECU PCB fuse) on the ECU is not open.
4. Verify that the fuser levers are in the up position. 5. Verify that the printer door is closed. 6. Verify that the motor connector is seated into the ECU. 7. Verify that the motor is correctly mounted on the printer chassis. 8. Check for and replace pinched or frayed wire harness wires. 9. Replace the motor. 10. Replace the ECU. 2 Do engine tests print? Print an engine test. (See page 79.)The engine test should print without paper-feed problems or print-quality problems. The printed page is filled with evenly spaced horizontal lines (approximately 1 mm apart). The engine-test was successful. The engine test button is pressed, but nothing happens. 1.
The toner cartridge is missing or the toner cartridge door is open. Install a toner cartridge and/or close the door. 2. A faulty toner-cartridge-to-ECU connection exists. Verify that all connectors to the ECU are firmly seated and contacts are clean. 3. A faulty connector-PCB-to-ECU connection exists. Replace the connector assembly. The motor rotates on and off (about 1 second), and then stops (no paper feed). 1. Verify that the laser/scanner connectors are fully seated. 2. Replace the laser/scanner. The motor rotates on, off, on, off in short cycles, and then stops (no paper feed). 1. Verify that the fuser wire connectors are fully seated. 2. Replace the fuser.