2-68 Service Manual
4025-XXX
Horizontal Streaks
There are black lines running horizontally across the paper.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions Yes No
1 EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge.
Are the horizontal streaks gone?
Problem
solved
Go to step 2
2 IMAGE DEVELOPMENT INSPECTION
Remove the Rear Cover.
Generate a Test Print and switch OFF printer power halfway
through the print cycle.
Open the Left Upper Cover.
Open the Drum Shutter.
Hand rotate (counterclockwise) the Main Drive Motor to
advance the Drum far enough so you can see the developed
image area on the Drum before
it reached Transfer.
Is the image on the drum complete without any visible
problems?
Go to step 3 Replace the
“Printhead
Assembly”
on page 4-57
3 IMAGE TRANSFER INSPECTION
Inspect the Test Print you generated in step 2.
Are horizontal streaks visible on the paper after Transfer?
Replace the
“BTR
Assembly”
on page 4-61
Go to step 4
4 FUSER INSPECTION
Generate another Test Print and switch OFF printer power
when the print is halfway through the Fuser.
Open the Left Upper Cover.
Examine the paper areas before the image enters the Fuser
and after the image exits the Fuser.
Is the image on the paper normal before it enters the
Fuser, but there are horizontal streaks visible when it exits
the Fuser?
Replace the
“Fuser
Assembly”
on page 4-65
Go to step 5
5 ESS PWB REPLACEMENT
Replace the “Controller Board (ESS PWB)” on page 4-94.
Are the horizontal streaks gone?
Problem
solved
Go to step 6
6 HVPS REPLACEMENT
Replace the “High Voltage Power Supply (HVPS)
Assembly” on page 4-88.
Are the horizontal streaks gone?
Problem
solved
Go to step 7
To Next Page
Loading...
