EPSON EPL-N3000/AcuLaser M4000N
Revision C
Troubleshooting
Picture Image Trouble
145
Confidential
3.5.2 Too Light Print (Weak Gradation)
Description of the problem:
Image density is too light as a whole.
Parts below can be the source of this error:
• Imaging Cartridge
• GUIDE ASSY CRU R
(p.257)
• BTR ASSY
(p.254)
• 150 FEEDER ASSY
(p.211)
• BOARD ASSY., MAIN
(p.299)
• ROS ASSY
(p.239)
• FUSER ASSY
(p.253)
• LVPS
(p.287)
• HVPS/MCU
(p.301)
• 550 FEEDER ASSY
(p.224)
Step
Action and Question
Yes
No
1
Paper condition
1. Set new dry recommended paper.
2. Execute test printing.
♦
Is image density normal?
Problem
solved
Go to Step 2
2
Path of laser beam
1. Inspect the path of laser beam from the ROS ASSY
to the Drum.
2. Check the window of the ROS ASSY to see if it is
not dirty.
♦
Is the path of the laser beam clean and is the
window of the ROS ASSY free from any obstacle?
Go to Step 3
Remove the
obstacle or
clean the
window of the
ROS ASSY.
3
Imaging Cartridge
1. Install a new Imaging Cartridge.
2. Print the image in question again.
♦
Is image density normal?
Problem
solved
Go to Step 4
4
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 5
Replace the
BTR ASSY
5
Grounding of the Drum
1.
Remove the GUIDE ASSY CRU R.
(p.257)
2. Inspect the Plate Earth located behind the GUIDE
ASSY CRU R.
♦
Is the Plate Earth free from dirt and damage and
deformation?
Go to Step 6
Repair or
clean the Plate
Earth, or
replace the
GUIDE ASSY
CRU R.
6
HVPS/MCU
1.
Replace the HVPS/MCU.
(p.301)
2. Execute test printing.
♦
Was the trouble cleared?
Problem
solved
Go to Step 7
7
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 8
Go to
3.4.16
HVPS/MCU
(p.126)
8
Image transfer process
1. Inspect the toner image formed on the drum located
just after the transfer portion (the BTR).
♦
Is the toner image on the drum completely copied
onto the paper?.
See “Parts
below can be
the source of
this error”
Go to
3.4.16
HVPS/MCU
(p.126)
Step
Action and Question
Yes
No
Содержание AcuLaser M4000N
Страница 1: ...EPSON EPL N3000 AcuLaserM4000N A4 Monochrome Laser Printer SERVICE MANUAL SEPG03004 Confidential ...
Страница 19: ...Confidential C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 33: ...Confidential C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 63: ...Confidential C H A P T E R 3 TROUBLESHOOTING ...
Страница 160: ...Confidential C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 396: ...Confidential C H A P T E R 5 ADJUSTMENT ...
Страница 404: ...Confidential C H A P T E R 6 MAINTENANCE ...
Страница 408: ...Confidential C H A P T E R 7 APPENDIX ...