Table 7. Basic troubleshooting (continued) Q1342-90910 Basic troubleshooting 65 # Verification steps Possible problems Solutions 2 Do engine tests The printer attempts to 1. The media tray is empty. Place media in print? (continued) pick up paper three times the tray. and then the motor stops 2. The printer is dirty. Clean the printer. (no paper feed). 3. Replace the pickup roller. 4. Replace the paper pickup assembly The printer attempts to 1. the paper-feed assembly connections pick up paper three are faulty. Verify that the all paper-feed times, and the paper assembly connectors to the ECU are firmly feeds but comes out seated. blank. 2. Replace the paper-feed assembly.
The printer attempts to 1. Verify that the motor connector is firmly pick up paper three times seated. and the laser/scanner 2. Replace the motor emits a high-pitched whine, but the motor does not turn. The printed page is filled 1. Make sure that the media meets with evenly spaced specifications detailed in the Print Media horizontal lines, but the Guide for the HP LaserJet printer family. toner can be easily 2. A faulty fuser assembly power smeared. connection exists. Verify that the fuser power connectors are firmly seated. 3. Replace the fuser. The engine-test page 1.
Verify that the output sensor (on the back begins to print, but the of the fuser) connector is firmly seated at page stops just after the ECU end. tripping the output sensor 2. Replace the output sensor flag. Hint When you attempt to troubleshoot engine-test page problems, it might be necessary to unplug the printer from the power source (power off), and then plug it back into the power source (power on) before printing a subsequent engine-test page. Verify that the printer was successfully turned on (see verification step 1). The printer attempts to pick up paper three times and then the motor stops (no paper feed). 1. The media tray is empty. Place media in the tray. 2.
The printer is dirty. Clean the printer. 3. Replace the pickup roller. 4. Replace the paper pickup assembly The printer attempts to pick up paper three times, and the paper feeds but comes out blank. 1. the paper-feed assembly connections are faulty. Verify that the all paper-feed assembly connectors to the ECU are firmly seated. 2. Replace the paper-feed assembly. The printer attempts to pick up paper three times and the laser/scanner emits a high-pitched whine, but the motor does not turn. 1. Verify that the motor connector is firmly seated. 2. Replace the motor The printed page is filled with evenly spaced horizontal lines, but the toner can be easily smeared. 1.
Make sure that the media meets specifications detailed in the Print Media Guide for the HP LaserJet printer family. 2. A faulty fuser assembly power connection exists. Verify that the fuser power connectors are firmly seated. 3. Replace the fuser. The engine-test page begins to print, but the page stops just after tripping the output sensor flag. 1. Verify that the output sensor (on the back of the fuser) connector is firmly seated at the ECU end. 2. Replace the output sensor 3 Wire harness connectors 1. Verify that the LED status panel The printer motor are open. connector to the connector assembly is Harness wires are firmly seated. rotates for about six pinched or frayed. The 2.
Verify that the connector-assembly-to- seconds and stops, but cable pod, connector ECU flat ribbon cable is firmly seated (at the LED status READY assembly, or LED status the connector assembly end). light does not illuminate. panel has failed. 3. Replace the cable pod When the printer is 4. Replace the connector PCB assembly successfully turned on, the 5. Replace the LED status light panel. green Ready status light is illuminated and the printer is ready to process a job. Note The LED lights will not operate if the cable pod is not connected to the printer. Wire harness connectors are open. Harness wires are pinched or frayed.
The cable pod, connector assembly, or LED status panel has failed. 1. Verify that the LED status panel connector to the connector assembly is firmly seated. 2. Verify that the connector-assembly-to- ECU flat ribbon cable is firmly seated (at the connector assembly end). 3. Replace the cable pod 4. Replace the connector PCB assembly 5. Replace the LED status light panel.