General Troubleshooting 4-9
Fault Isolation
Isolate a fault to the Printer or to the Image Processor Board by running the Print
Engine Test Print, see page 5-9.
■ If the printer sucessfully prints the Print Engine Test Print, replace the Image
Processor Board.
■ If the Printer fails the Print Engine Test, troubleshoot the Print Engine
starting with the "AC Power Supply Troubleshooting" on page 4-13.
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 Sensor (Error)
7. All paper sensor (Jam)
8. OHP sensor (Jam)
9. Door(s) (Open)
10. Environment Sensor (Error)
11. NVRAM (NVRAM error)
12. Image Processor Board POST Diagnostic check
Printer Does Not Come to a "Ready" State
■ ·See “AC Power Supply Troubleshooting” on page 4-13.
■ See "Fault Isolation" on page 4-9
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