2-66 Service Manual
4025-XXX
Vertical Streaks
There are black lines running vertically along the page.
THE PRINTER DISPLAYS NO ERROR CODE.
5 HVPS REPLACEMENT
Replace the “High Voltage Power Supply (HVPS)
Assembly” on page 4-88.
Are the horizontal band deletions gone?
Problem
solved
Go to step 6
6 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• CRU Connector and Contact Springs
• MCU PWB - Go to “Engine Board (MCU PWB)” on
page 4-92.
• I/O PWB - Go to “I/O PWB” on page 4-89.
• Fuser Assembly - Go to “Fuser Assembly” on page 4-65.
Step Actions and Questions Yes No
1 PAPER PATH INSPECTION
Inspect the paper path, between feed and exit, for
contamination or obstructions.
Is the paper path free of contamination or obstructions?
Go to step 2 Remove
contamination
and
obstructions
from the
paper path.
2 PRINTHEAD WINDOW INSPECTION
Remove the EP Cartridge.
Inspect the Printhead Window for contamination that could be
blocking part of the laser beam from reaching the Drum.
Is the Printhead Window clean?
Go to step 3 Clean
Printhead
window
3 EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge.
Are the vertical streaks gone?
Problem
solved
Go to step 4
Step Actions and Questions Yes No
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