Epson EPL-N4000 - Light(Undertoned) Prints

EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 111
3.4.1 Light(Undertoned) Prints

Problem
The overall ima
g
e density is too li
g
ht.
The ima
g
e may also be unfused due to
insufficient ima
g
e density.

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.
•
ROS Assembly
•
MCU PWB
Table 3-27.
Light Prints
Table 3-28. Light Prints
Step Actions and Questions Yes No
1
PAPER INSPECTION
Is the paper wrinkled or dimpled?
Load fresh,
dr
y
paper.
Go to step 2
2
EP CARTRIDGE REPLACEMENT
Install a new EP Cartrid
g
e (CRU).
Is the image density normal?
Problem
solved
Go to step 3
Step Actions and Questions Yes No
3
IMAGE DEVELOPMENT INSPEC-
TION
1. Remove the Rear Cover.
2. Generate a Grid 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
developed; with sharp, black, easily
read areas?
Go to step 4 Replace the
HVPS
Assembly
4
IMAGE TRANSFER INSPECTION
1. Carefull
y
remove the Test Print
g
enerated 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?
Go to step 5 Replace the
BTR
Assembly. If
the problem
persists,
replace the
HVPS
Assembly