Light (Undertone) Print - Epson EPL-N2050 Service Manual

EPSON EPL-N2050

3.4.1 Light (Undertone) Print

Problem
The overall image density is too
light.
Troubleshooting
Initial Analysis
1. Inspect the following components. Are they
compatible with your printer version,
correctly installed, not damaged, deformed,
or contaminated?
• CRU
• Spring Clip
• Chute Trans Assy
• PWBA HKB MCU
• PWBS LVPS
• Harness Assy Fuser-M (J271, J11, J27,
J262)
• Cover Assy Front
• HVPS
• BTR Assy
• ROS Assy
• Harness Assy Conn (J23-J231)
• Fuser Assy
2. Inspect the printer paper path. Is it clear of
foreign matter such as staples, paper clips,
and paper scrap?
Troubleshooting by Print Image Quality
Table 3-10. Light Print
Step Action and Question
PAPER CONDITIONS
1
Is there moisture in the paper?
DRUM GROUND
Check the Drum Ground Path:
2
Drum>Drum Shaft>Spring Clip>Frame
Is the Drum Ground Path complete?
LASER BEAM PATH
Inspect the laser beam path between
the ROS Assy and the Drum for
3
contamination or obstructions.
Is the laser beam path free of
obstacles?
BRT ASSY
Inspect the BTR Assy for
4
contamination.
Is the BTR free of contamination?
IMAGE TRANSFER PROCESS FAILURE
Generate a test print and switch OFF
printer power halfway through the
print cycle.
5
Remove the CRU and inspect the toner
image on the drum.
Was the image on the drum
transferred completely to the paper?
CRU FAILURE
6 Install a new CRU.
Is the problem solved?
Revision B
Yes No
Load fresh and
Go to Step 2.
dry paper.
Re-establish
Go to Step 3. the Drum
Ground Path.
Remove
Go to Step 4. obstructions or
contamination.
Replace the
Go to Step 5.
BTR Assy.
Go to
Table 3-44,
Go to Step 6. "PWBA HVPS
Failure," on
page 100.
Problem Return to Initial
solved. Analysis.
73