Electrical Noise - Epson EPL-6200 Service Manual

EPSON EPL-6200/EPL-6200L

3.4.2 Electrical Noise

Table 3-28. Troubleshooting for "Electrical Noise"
Step Action and Question
Parts below can be the source of this error
• Main Board Assy (C533/C534 Main) (p.146)
• Power Supply Unit (PU1) (p.151)
• Fuser Unit (p.152)
• High Voltage Unit (HV1) (p.151)
• Photoconductor Unit (p.135)
• Developer Cartridge (p.135)
• Paper Cassette Unit Control Board (p.162)
Duplex Unit Control Board
•
External noise
1. Check to see if within 3 m from the printer there is
another electrical apparatus, such as a generator,
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
Check the AC power connection.
2
♦ Is the AC power cable connected and grounded
properly?
Grounding screw
Check the grounding screw of the AC Inlet.
3
♦
Is the cable grounded properly?
Photoconductor Unit (Drum Cartridge)/Developer
Cartridge (toner cartridge)
4
Replace the Photoconductor Unit or Developer
Cartridge.
♦ Does the problem with electrical noise still occur?
Troubleshooting
Yes
(Chapter 4 Disassembly and Assembly)
(p.163)
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 Abnormal Operations
Table 3-28. Troubleshooting for "Electrical Noise" (continued)
Step
Continuity of cables
No
5
Check continuity of each cable.
♦
Does each cable have continuity?
Grounding of circuit boards
6
Check grounding of circuit boards.
♦
Is grounding ensured?
Fuser unit
7
Replace the fuser unit.
♦ Does the problem still occur?
High voltage unit
8
Replace the high voltage unit.
♦ Does the problem still occur?
Power supply unit
9
Replace the power supply unit.
♦
Does the problem still occur?
Main Board Assy.
10
Replace the Main Board Assy.
♦
Does the problem still occur?
Action and Question
Go to Step 6
Go to Step 7
Go to Step8
Go to Step9
Go to Step10
Replace all
the relevant
parts.
Revision A
Yes No
Replace the
defective
cable.
Ensure
grounding.
Replace the
fuser unit.
Replace the
high voltage
unit.
Replace the
power supply
unit.
Problem
solved
120