5-36 Phaser 7400 Color Printer Service Manual
6
Swap the Imaging Unit of the problem
color with any other Imaging Unit.
NOTE: Remove the keys before
swapping.
Print a Solid Fill Test Pattern to check
for defects.
Has the problem color moved with the
Imaging Unit?
Replace the
defective Imaging
Unit.
Go to Step 7.
7
Check the Fuser for damage. Replace the Fuser. Go to Step 8.
8
Verify the ribbon cables and wiring
harnesses on the LED Heads are
seated, connected and routed
properly.
Replace the Engine
Control Board
(
page 8-112).
Reseat, reconnect or
replace damaged
wiring harnesses.
Troubleshooting Procedure Table (Continued)
Step Actions and Questions Yes No