Epson EPL-N4000, Service Manual

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EPSON EPL-N4000/EPL-N4000+ Chapter 3 Troubleshooting
Rev.B 114
3.4.3 Black Prints
Problem
The entire print is black.
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.
•LVPS Assembly
Table 3-32. Black Prints
Table 3-33. Black Prints
Step Actions and Questions Yes No
1 ROS WINDOW INSPECTION
1. Remove the EP Cartridge.
2. Inspect the ROS Window for a sheet
of paper that may have lodged in
front of it and could be blocking the
laser beam from reaching the Drum.
Is the ROS Window free of paper?
Go to step 2 Remove the
paper
2
CONTROLLER OR HOST SOFT-
WARE ISOLATION
Generate a Grid Test Print.
Is the test print image normal?
Replace the
ESS PWB
or reload
the Host
Software Go to step 3
Step Actions and Questions Yes No
3
EP CARTRIDGE REPLACEMENT
Install a new EP Cartridge
Is there a normal image on the paper?
Problem
solved Go to step 4
4 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 and clear, white areas?
Replace the
BTR
Assembly.
Go to step 5
5 MAIN
CONTROLLER(C262MAIN)
BOARD REPLACEMET
1. Replace the Main Controller
Board(C262 Main).
2. Generate a Grid Test Print.
Is the printed Test Pattern normal?
Problem
solved Go to step 6