Epson EPL-N2050 Service Manual page 101
Monochrome laser printer
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Also See for EPL-N2050:
- Service manual (261 pages) ,
- Setup manual (55 pages) ,
- Service manual (261 pages)
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EPSON EPL-N2050
Table 3-45. Electrical Noise
Step
Actions & Questions
INITIAL ANALYSIS
Inspect the following components:
• PWBA HKB MCU
• PWBA HVPS
• Fuser Assy
• Heat Rod
• Harness Assy Fuser -M (J271,J11, J27,
J262)
• PWBA LVPS
1
• CRU
• P/H Assy
• Resist Buffle
• BTR Chute Assy
• Spring Earth Exit
• Chute Assy MBF
• Cover Assy Front
Are they compatible with your printer
version, correctly installed, not damaged,
deformed, or contaminated?
Check the AC power cord and the AC wall
outlet.
2
Is the printer properly grounded?
Check the area around the printer.
3
Is there an electrical device, such as a
generator or an appliance, near the printer.
P/H ASSY
Check to make sure the Springs Earth are
4
firmly attached to the P/H Assy.
Are the Springs Earth firmly attached to the
P/H Assy?
SPRING EARTH EXIT
Check to make sure the Spring Earth Exit is
5
firmly attached to the Chute Exit:
Are the Spring Chute Exit firmly attached to
the Chute Exit?
Troubleshooting
Yes
No
Replace the
Go to Step 2.
problem
components.
Ground the
Go to Step 3.
printer.
Move the
device, or
Go to Step 4.
relocated the
printer.
Re-secure the
Go to Step 5.
Spring Earth.
Re-secure the
Go to Step 6.
Spring Chute
Exit.
Secondary FIPs
Table 3-45. Electrical Noise (Continued)
Step
Actions & Questions
HARNESS ASSY FUSER-M (J271, J11, J27,
J262)
6
Is there continuity (0 ) between J27–1 and
J271-5, and J27-3 and J271-3?
FUSER ASSY
Remove the Fuser Top Cover and Left Cover.
7
Is there continuity (0 ) between the Heat
Roll and the Nip Lever L?
CRU
8
Install a new CRU.
Is the noise still present?
Inspect the machine ground path.
9
Is there continuity (0 ) along the entire
printer ground path?
Try the initial analysis again.
10
Is there a faulty component?
Revision B
Yes
No
Replace the
Harness Assy
Go to Step 7.
Fuser-M (J271,
J11, J27, J262).
Reinstall the
components to
Go to Step 8.
establish
continuity.
Problem
Go to Step 9.
solved.
Repair the
Go to Step 10.
ground path.
Look for an
Replace the
external device
component.
causing the
noise.
101
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Table of Contents
Troubleshooting
