Epson AcuLaser M4000N, Service Manual

Page: 155 / 477

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Picture Image Trouble 155
Confidential
3.5.11 Ghost Image
†
Description of the problem:
Ghost image appears on the printed sheet. The
image printed on the previous page or part of
image printed on the current page appears
again as a image.
†
Parts below can be the source of this error:
• Imaging Cartridge
• HVPS/MCU
(p.301)
• GUIDE ASSY CRU R
(p.257)
• DRIVE ASSY OPT FDR
(p.307)
• BTR ASSY
(p.254)
• 150 FEEDER ASSY
(p.211)
• MAIN MOTOR
(p.279)
• GEAR ASSY HOUSING
(p.281)
• BOARD ASSY., MAIN
(p.299)
• FUSER ASSY
(p.253)
• Heat Roll
• Pressure Roll
• 550 FEEDER ASSY
(p.224)
Step Action and Question Yes No
1
Repeated printing
1. Examine the ghost image.
♦
Did the customer print many copies of the same
image?
Go to Step 2 Go to Step 3
2
1. Print 30 pages of different images.
♦
Does the ghost image still appear?
Go to Step 3
Problem
solved
(Many copies
of the same
image are not
printed.)
3
Paper condition
1. Set new dry recommended paper.
2. Print the image in question again.
♦
Does the problem still occur?
Go to Step 4
Problem
solved
4
Imaging Cartridge
1. Install a new Imaging Cartridge.
2. Print the image in question again.
♦
Does the ghost image still appear?
Go to Step 5
Problem
solved
5
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 6
Replace the
BTR ASSY
6
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?
Go to Step 7
Replace the
FUSER ASSY
7
Grounding of Heat Roll, Pressure Roll and Inlet Chute
1. Check with the naked eye the two plates at the left
side of the FUSER ASSY for deformation, dirt or
damage with the naked eye.
2. Check continuity between the plates at the left side of
the FUSER ASSY and each of the following points:
• Rear plate
↔
Uncoated portion at both ends of the
Heat Roll (5-10KW)
• Front plate
↔
Plate at the left end of the Inlet Chute
(1-2KW)
♦
Do the plates for grounding the Heat Roll, Pressure Roll
and Inlet Chute have continuity, without any faults?
Go to Step 8
Replace the
FUSER ASSY
8
Grounding of the FUSER ASSY
1. Remove the Imaging Cartridge.
2. Check the GEAR ASSY HOUSING for dirt,
damage or deformation.
3. Check continuity between the screw in the rear of
the FUSER ASSY and the printer frame.
♦
Is the GEAR ASSY HOUSING free from dirt,
damage or deformation?
♦
Is the FUSER ASSY grounded?
See “Parts
below can be
the source of
this error”
Replace the
GEAR ASSY
HOUSING
Step Action and Question Yes No