Epson EPL-N4000 - Horizontal Streaks

EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 119
3.4.7 Horizontal Streaks

Problem
There are black lines runnin
g
horizontally across the pa
g
e.

SUSPECT COMPONENTS
The followin
g
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 usin
g
this
FIP, replace each component listed
below, one at a time, until the problem
disappears.
• MCU PWB
• CRU Connector and Contact Springs
Table 3-41. Horizontal Streaks
Table 3-42. Horizontal Streaks
Step Actions and Questions Yes No
1
EP CARTRIDGE REPLACEMENT
Install a new EP Cartrid
g
e.
Are the horizontal streaks gone?
Problem
solved
Go to step 2
Step Actions and Questions Yes No
2
IMAGE DEVELOPMENT INSPEC-
TION
1. Remove the Rear Cover.
2. Generate a Blank Test Print and
switch OFF printer power halfwa
y
throu
g
h the print c
y
cle.
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 enou
g
h so
y
ou can see the
developed ima
g
e area on the Drum
before
it reached Transfer.
Is the image on the drum completely
white; without any horizontal streaks
visible?
Go to step 3 Replace the
ROS
Assembl
y
.
3
IMAGE TRANSFER INSPECTION
Inspect the Blank Test Print
y
ou
g
enerated in step 2.
Are horizontal streaks visible on the
paper after Transfer?
Replace the
BTR
Assembl
y
.
Go to step 4
4
FUSER INSPECTION
1. Generate another Blank Test Print and
switch OFF printer power when the
print is halfwa
y
throu
g
h the Fuser.
2. Open the Left Upper Cover.
3. Examine the paper areas before the
ima
g
e enters the Fuser and after the
ima
g
e 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
Assembl
y
.
Go to step 5