Epson EPL-6200L service manual Troubleshooting for Electrical Noise

EPSON EPL-6200/EPL-6200L Revision A

3.4.2	Electrical Noise
	Table 3-28. Troubleshooting for “Electrical Noise”
Step	Action and Question	Yes	No
	Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
	• 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 (p.163)
	External noise
	1. Check to see if within 3 m from the printer there is
	another electrical apparatus, such as a generator,
1	radio transmitter or an apparatus incorporating a		Problem
	motor.	Go to Step 2
			solved
	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		Ask the
2	Check the AC power connection.	Go to Step 3	customer for
	♦Is the AC power cable connected and grounded		repair of the
			AC power
	properly?
			connection.
	Grounding screw		Install the
3	Check the grounding screw of the AC Inlet.	Go to Step 4	grounding
	♦Is the cable grounded properly?		screw
			properly.
	Photoconductor Unit (Drum Cartridge)/Developer
4	Cartridge (toner cartridge)		Problem
	Replace the Photoconductor Unit or Developer	Go to Step 5
			solved
	Cartridge.
	♦Does the problem with electrical noise still occur?

Table 3-28. Troubleshooting for “Electrical Noise” (continued)

Step	Action and Question	Yes	No
5	Continuity of cables		Replace the
	Check continuity of each cable.	Go to Step 6	defective
	♦Does each cable have continuity?		cable.
6	Grounding of circuit boards		Ensure
	Check grounding of circuit boards.	Go to Step 7
			grounding.
	♦Is grounding ensured?
7	Fuser unit		Replace the
	Replace the fuser unit.	Go to Step8
			fuser unit.
	♦Does the problem still occur?
8	High voltage unit		Replace the
	Replace the high voltage unit.	Go to Step9	high voltage
	♦Does the problem still occur?		unit.
9	Power supply unit		Replace the
	Replace the power supply unit.	Go to Step10
			power supply
	♦Does the problem still occur?		unit.
10	Main Board Assy.	Replace all	Problem
	Replace the Main Board Assy.
		the relevant
			solved
	♦Does the problem still occur?	parts.

Troubleshooting Troubleshooting for Abnormal Operations 120