4-12 Phaser 6300/6350 Color Laser Printer Service Manual
Inoperable Printer Troubleshooting
Engine Power-Up Sequence
1. Engine Control Board logic check
2. Imaging Unit (Missing, NVRAM (CRUM) Error, CRUM ID, Life Over)
3. Fuser (Missing, NVRAM (CRUM) Error, Life Over)
4. Toner Cartridge (Missing, Life Over)
5. Transfer Roller (Missing, Life Over)
6. CTD (ADC) Sensor (Error)
7. All paper sensor (Jam)
8. Door(s) (Open)
9. Environment Sensor (Error)
10. NVRAM (NVRAM error)
11. Image Processor Board POST Diagnostic check
Printer Continually Displays Warming Up...
1. Verify the correct Fuser (110 V vs 220 V) is installed in the printer.
2. See the Engine Power-Up Sequence on (page 4-12).
Printer Continually Displays Install or Reseat Imaging
Unit
1. See “Install or Reseat Imaging Unit” on page 3-33.
Printer Displays Reseat Contoller Board
1. Turn Off printer power.
2. Remove the Image Processor Board (page 8-98).
3. Check the condition of (P/J120). Reseat the Image Processor Board and
completely tighten the screws that secure the Rear Panel to the frame.
4. Reboot the printer. If the error persists, turn Off printer power and verify the
3.3 VDC supplied from the LVPS. See "DC Power Supply Troubleshooting" on
page 4-14.
5. Reboot the printer. If the error persists, turn Off printer power and replace the
Image Processor Board (page 8-98).
6. Reboot the printer. If the error persists, turn Off printer power and replace the
Engine Control Board (page 8-104).
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