Electrical Noise - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.17 Electrical Noise

Table 3-76. Troubleshooting for Electrical Noise
Step Action and Question
Parts below can be the source of this error
• HVPS/MCU
(p.301)
• GUIDE ASSY CRU R
(p.257)
• FUSER ASSY
(p.253)
• Imaging Cartridge
• HARNESS ASSY ANT
• HARNESS ASSY AC110V
(p.289)
• HARNESS ASSY LVPS
• Option 550 Paper Feeder
(p.303)
• PWBA FEEDER 550
(p.310)
• PWBA DUPLEX
(p.347)
External noise
1. Check to see if within 3 m from the printer there is
another electrical apparatus, such as a generator, a
radio transmitter or an apparatus incorporating a
1
motor.
2. Turn off the power to the electrical apparatus in
question or move the printer to a position at least 6
m distant from the apparatus.
♦
Does the problem with electrical noise still occur?
AC grounding
1. Check the AC power connection.
2
♦
Is the AC power cable connected and grounded
properly?
HARNESS ASSY AC100V
3 1. Inspect the grounding screw of the cable connected
to the HARNESS ASSY AC100V.
♦
Is the cable grounded properly?
Imaging Cartridge
4
1. Replace the Imaging Cartridge.
♦
Does the problem with electrical noise still occur?
Troubleshooting
Yes No
(Chapter 4 Disassembly and
Assembly)
Problem
Go to Step 2
solved
Ask the
customer for
Go to Step 3 repair of the
AC power
connection.
Install the
grounding
Go to Step 4
screw
properly.
Problem
Go to Step 5
solved
Troubleshooting for Individual Units
Table 3-76. Troubleshooting for Electrical Noise (continued)
Step Action and Question
GUIDE ASSY CRU R (1)
1. Is there continuity in the harness of the GUIDE
TRAY LEFT between Tray 1 Size Switch ↔ J1821
5
and between Tray 2 Size Switch ↔ J1821?
♦
Are the Plates Earth of the GUIDE ASSY CRU R in
contact with the respective terminals on the HVPS/
MCU properly?
GUIDE ASSY CRU R (2)
1. Remove the Imaging Cartridge.
2. Remove the GUIDE ASSY CRU R. (p.257)
6
3. Check the Plate Earth of the GUIDE ASSY CRU R.
♦
Are the Plate Earth of the GUIDE ASSY CRU R
free from abnormalities, dirt, obstacles or
deformation?
HARNESS ASSY ANT
1. Disconnect the connector P/J15 on the HVPS/MCU.
7
(Refer to "Connectors (p.406)")
2. Check continuity between J15 ↔ J150.
♦ Is there continuity between J15 ↔ J150?
Revision C
Yes No
Replace the
Go to Step 6 GUIDE ASSY
CRU R
Clean the
plates or
Go to Step 7 replace the
GUIDE ASSY
CRU R
Replace the
Go to Step 8 HARNESS
ASSY ANT
127
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