EPSON EPL-N3000/AcuLaser M4000N
Revision C
Troubleshooting
Troubleshooting for Faulty Operation
107
Confidential
3.3.2 LCD/LED Malfunction
3.3.3 Keypad Operation Impossible
Table 3-54. Troubleshooting for LCD/LED Malfunction
Step
Action and Question
Yes
No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
• CONTROL PANEL
(p.170)
• WIRE HARNESS
• HVPS/MCU
(p.301)
• LVPS
(p.287)
1
3.3 VDC Power Supply
1. Check the voltage across the harness of the
OPERATION PANEL.
♦
Is the voltage 3.3 VDC across the harness of the
OPERATION PANEL?
Go to Step 2
Go to Step 4
2
OPERATION PANEL (1)
1. Check continuity of each wire of the WIRE
HARNESS.
♦
Does each wire of harness have continuity?
Go to Step 3
Replace the
HARNESS
ASSY
PANEL
3
OPERATION PANEL (2)
1. Replace the OPERATION PANEL.
(p.170)
♦
Has the display been stabilized?
Problem
solved
Replace the
BOARD
ASSY.,
MAIN
4
OPERATION PANEL (3)
♦
Is the voltage between P/J28-5
↔
P/J28-4 on the
BOARD ASSY., MAIN 3.3 VDC?
Go to Step 5
Replace the
BOARD
ASSY.,
MAIN
5
FCC ASSY ESS
1. Disconnect P/J28 of the HVPS/MCU.
2. Check continuity between the following connectors.
P/J28-5
↔
P/J280-22
P/J28-4
↔
P/J280-23
♦
Is there normal continuity in each wiring?
Replace the
BOARD
ASSY.,
MAIN
Replace the
FCC ASSY
ESS
Table 3-55. Troubleshooting for Keypad Operation Impossible
Step
Action and Question
Yes
No
Parts below can be the source of this error (
Chapter 4 Disassembly and Assembly
)
• CONTROL PANEL
(p.170)
• HARNESS ASSY PANEL
• HVPS/MCU
(p.301)
• LVPS
(p.287)
1
3.3 VDC Power Supply
1. Check the voltage across the harness of the
OPERATION PANEL.
♦
Is the voltage 3.3 VDC across the harness of the
OPERATION PANEL?
Go to Step 2
Go to Step 4
2
OPERATION PANEL (1)
1. Check continuity of each wire of harness.
♦
Does each wire of harness have continuity?
Go to Step 3
Replace the
HARNESS
ASSY
PANEL
3
OPERATION PANEL (2)
1. Replace the OPERATION PANEL.
(p.170)
♦
Has the display been stabilized?
Problem
solved
Replace the
BOARD
ASSY.,
MAIN
4
OPERATION PANEL (3)
♦
Is the voltage between P/J28-5
↔
P/J28-4 on the
BOARD ASSY., MAIN 3.3 VDC?
Go to Step 5
Replace the
BOARD
ASSY.,
MAIN
5
FCC ASSY ESS
1. Disconnect P/J28 of the HVPS/MCU.
2. Check continuity between the following connectors.
P/J28-5
↔
P/J280-22
P/J28-4
↔
P/J280-23
♦
Is there normal continuity in each wiring?
Replace the
BOARD
ASSY.,
MAIN.
Replace the
FCC ASSY
ESS
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 ...