EPSON EPL-N3000/AcuLaser M4000N
Revision C
Troubleshooting
Picture Image Trouble
156
Confidential
3.5.12 Fog
Description of the problem:
Toner is present in some unexpected areas or
over the whole page. Such areas appear
fogged.
Parts below can be the source of this error:
• Imaging Cartridge
• BTR ASSY
(p.254)
• HVPS/MCU
(p.301)
• GUIDE ASSY CRU R
(p.257)
• ROS ASSY
(p.239)
• BOARD ASSY., MAIN
(p.299)
• 150 FEEDER ASSY
(p.211)
• FUSER ASSY
(p.253)
• 550 FEEDER ASSY
(p.224)
Step
Action and Question
Yes
No
1
Imaging Cartridge
1. Install a new Imaging Cartridge.
2. Execute test printing.
♦
Has the fog disappeared?
Problem
solved
Go to Step 2
2
Image developing process
1. Execute test printing, and turn off the power to the
printer during printing.
2. Remove the Imaging Cartridge carefully, and
inspect the toner image formed on the drum located
just before the transfer portion (BTR).
♦
Is the image on the drum such that it has been
completely formed, the region is clear and black,
and can be easily read?
Go to Step 3
Go to
3.4.16
HVPS/MCU
(p.126)
3
ROS ASSY
♦
Is the connector of the ROS ASSY connected
completely?
Go to Step 4
Reconnect the
connector.
4
Grounding of the 150 FEEDER ASSY
1. Remove the Imaging Cartridge.
2. Check continuity of the 150 FEEDER ASSY,
through the front opening between the metal part of
the 150 FEEDER ASSY and the metal part of the
printer frame.
♦
Is the 150 FEEDER ASSY grounded properly?
Go to Step 5
Remove the
150 FEEDER
ASSY once
and then
install it again
so that it is
grounded
correctly.
5
Grounding of the FUSER ASSY
1. Open the COVER REAR.
2. Check continuity between the screw in the rear of
the FUSER ASSY and the printer frame.
♦
Is the FUSER ASSY grounded properly?
See “Parts
below can be
the source of
this error”
Remove the
FUSER ASSY
once and then
install it again.
Step
Action and Question
Yes
No
Summary of Contents for AcuLaser M4000N
Page 19: ...Confidential C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 33: ...Confidential C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 63: ...Confidential C H A P T E R 3 TROUBLESHOOTING ...
Page 160: ...Confidential C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Page 396: ...Confidential C H A P T E R 5 ADJUSTMENT ...
Page 404: ...Confidential C H A P T E R 6 MAINTENANCE ...