Blank White - Epson EPL-N4000 Service Manual

EPSON EPL-N4000/EPL-N4000+

3.4.2 Blank White

Table 3-30. Blank White
Step Actions and Questions
CONTROLLER OR HOST SOFT-
1
WARE ISOLATION
Generate a Grid Test Print.
Is the test print image normal?
EP CARTRIDGE REPLACEMENT
2
Install a new EP Cartridge.
Is there a normal image on the
paper?
Rev.B


Problem
The entire print is blank.


SUSPECT COMPONENTS
The following components are
associated with this specific problem.
One or more of these components may
have failed partially or completely. If you
cannot isolate the problem using this
FIP, replace each component listed
below, one at a time, until the problem
disappears.
•MCU PWB
•CRU Connector and Contact Springs
Yes
Troublesho Go to step 2
ot or
replace the
ESS PWB
or reload
the Host
Driver
Software
Problem Go to step 3
solved
Step Actions and Questions
3 IMAGE DEVELOPMENT INSPEC-
TION
1. Remove the Rear Cover.
2. Generate a Grid Test Print and switch
OFF printer power halfway through the
print cycle.
3. Open the Left Upper Cover.
4. Open the Drum Shutter.
5. Hand rotate (counter clockwise) 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 completely
developed; with sharp, black, easily
read areas?
IMAGE TRANSFER INSPECTION
4
No
1. Carefully remove the Test Print
generated in step 3.
2. Inspect the print.
Was the toner image on the drum
transferred completely to the paper.
And are the grid lines black and
unbroken?
Chapter 3
Table 3-31. Blank White
Yes
Go to step 4
Suspect an
intermittent
problem.
Replace the
MCU PWB
and/or refer
to the wiring
diagrams
Section 14
and check for
a broken wire
or loose
connection
between
components
in the
Xerographic
sections of
the printer.
Troubleshooting
No
Replace the
HVPS
Assembly.
Replace the
BTR
Assembly. If
the problem
persists,
replace the
HVPS
Assembly
113