Phaser 6180 Color Laser Printer Service Manual 4-65
General Troubleshooting
Engine Test Print
This test isolates printer hardware problems to either the Engine Control 
Board or Image Processor Board.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ Image Processor Board, PL9.1.27
■ MCU Board, PL9.1.20
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Remove the Image Processor Board 
(page 8-89).
2 Turn the printer power On (the Control 
Panel will be blank).
3 Short the pins on the MCU Board.
4 Did the printer print the TestPat600 IOT 
page?
Replace the 
Image 
Processor 
Board 
(page 8-89).
Replace the 
MCU Board 
(page 8-87).
s6180-503