Repair Analysis Procedures
Phaser® 3500 Laser Printer Service Manual
2-17
General Troubleshooting
The following procedures cover Control Panel and Start-up problems with the printer when no
specific error code or Control Panel message is displayed.
Control Panel Troubleshooting
No Control Panel Display after Power Is Turned ON
1. Verify that power cord is securely plugged into both the printer and the grounded, three
prong AC outlet with the appropriate power available.
2. Ensure that all covers are securely closed.
3. Verify the Top Cover, Print Cartridge, and Fuser interlocks are functional.
4. Verify voltages at the Main Board, see Power Supply Troubleshooting on page 2-18.
5. Replace the Power Supply Board.
6. Replace the Main Board.
7. Replace the Control Panel.
Control Panel LED is On, Control Panel Display Is Blank
1. Remove and reseat the Control Panel wiring to the Main Board.
2. Replace the Control Panel.
3. Replace the Main Board.
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