EPSON EPL-N3000/AcuLaser M4000N
Revision C
Troubleshooting
Picture Image Trouble
154
Confidential
3.5.10 Black Spots
Description of the problem:
Over the whole paper, spots of toner lie
scattered disorderly.
Parts below can be the source of this error:
• Imaging Cartridge
• HVPS/MCU
(p.301)
• BTR ASSY
(p.254)
• 150 FEEDER ASSY
(p.211)
• ROS ASSY
(p.239)
• GUIDE ASSY CRU R
(p.257)
• BOARD ASSY., MAIN
(p.299)
• 550 FEEDER ASSY
(p.224)
Step
Action and Question
Yes
No
1
Imaging Cartridge
1. Install a new Imaging Cartridge.
2. Execute test printing.
♦
Have the spots disappeared?
Problem
solved
Go to Step 2
2
BTR ASSY
1.
Remove the BTR ASSY.
(p.254)
2. Check the BTR Assy for dirt or wear.
♦
Is the BTR free from dirt and damage and wear?
Go to Step 3
Replace the
BTR ASSY
3
ROS ASSY
♦
Is the connector of the ROS ASSY connected
completely?
Go to Step 4
Reconnect the
connector.
4
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 5
Go to
3.4.16
HVPS/MCU
(p.126)
5
Heat Roll and Pressure Roll
1.
Remove the FUSER ASSY.
(p.253)
WARNING!: Wait until the Fuser cools, and
then start work.
2. Turn the Gear HR by hand, and inspect the Heat
Roll and the Pressure Roll.
♦
Are the Heat Roll and the Pressure Roll free from
scratches, dirt and damage?
See “Parts
below can be
the source of
this error”
Replace the
FUSER ASSY
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 ...