Fog - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.5.12 Fog

Step Action and Question
Imaging Cartridge
1 1. Install a new Imaging Cartridge.
2. Execute test printing.
♦
Has the fog disappeared?
Image developing process
1. Execute test printing, and turn off the power to the
printer during printing.
2. Remove the Imaging Cartridge carefully, and
2
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?
ROS ASSY
3
♦
Is the connector of the ROS ASSY connected
completely?
Troubleshooting
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)
Yes
Problem
Go to Step 2
solved
Go to
Go to Step 3 HVPS/MCU
(p.126)
Reconnect the
Go to Step 4
connector.
Picture Image Trouble
Step Action and Question
Grounding of the 150 FEEDER ASSY
1. Remove the Imaging Cartridge.
2. Check continuity of the 150 FEEDER ASSY,
4
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?
Grounding of the FUSER ASSY
1. Open the COVER REAR.
5
2. Check continuity between the screw in the rear of
the FUSER ASSY and the printer frame.
♦
Is the FUSER ASSY grounded properly?
No
3.4.16
Revision C
Yes No
Remove the
150 FEEDER
ASSY once
and then
Go to Step 5
install it again
so that it is
grounded
correctly.
See "Parts Remove the
below can be FUSER ASSY
the source of once and then
this error" install it again.
156
Confidential