Switch Duplex - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.31 SWITCH DUPLEX

Table 3-90. Troubleshooting for SWITCH DUPLEX
Step Action and Question
Parts below can be the source of this error

• SWITCH DUPLEX

(p.357)
• HARNESS ASSY DUP COVER
• COVER HARNESS, HARNESS ASSY DUP
• PWBA DUPLEX
(p.347)
• HARNESS ASSY LVPS
• HVPS/MCU
(p.301)
• LVPS
(p.287)
SWITCH DUPLEX (1)
1. Remove the SWITCH DUPLEX.
2. While pressing and releasing the lever of the
SWITCH DUPLEX, check continuity between
1
J520-2 ↔ J520-1.
(Refer to "Connectors (p.406)")
Is there continuity between J520-2 ↔ J520-1 when
♦
the SWITCH DUPLEX is pushed, and discontinuity
when it is released?
HARNESS ASSY DUP COVER
1. Remove the HARNESS ASSY DUP COVER.
2
2. Check continuity between J52 ↔ J520.
♦ Is there continuity between J52 ↔ J520?
HARNESS ASSY DUP
1. Disconnect the HARNESS ASSY DUP.
3
2. Check continuity between J50
♦
Is there continuity between J50
HARNESS ASSY LVPS
1. Disconnect the HARNESS ASSY LVPS.
4
2. Check continuity between J27
♦
Is there continuity between J27
Troubleshooting
Yes
(Chapter 4 Disassembly and
Assembly)
(p.359)
Replace the
Go to Step 2 SWITCH
DUPLEX
Replace the
HARNESS
Go to Step 3
ASSY DUP
COVER
Replace the
Go to Step 4 HARNESS
↔
J2750.
ASSY DUP
↔
J2750?
Replace the
Go to Step 5 HARNESS
↔
J2750.
ASSY LVPS
↔
J2750?
Troubleshooting for Individual Units
Table 3-90. Troubleshooting for SWITCH DUPLEX
Step Action and Question
SWITCH DUPLEX (2)
No
1. Remove the Imaging Cartridge.
5
2. Check the voltage between P/J27-4 ↔ P/J27-3 on
the HVPS/MCU.
Is the voltage 3.3 VDC between P/J27-4 ↔ P/J27-3?
♦
HVPS/MCU
6 1. Disconnect P/J27 from the HVPS/MCU.
♦ Is there normal continuity between P27-4 ↔ P11-
16?
Revision C
Yes No
Go to 3.4.28
PWBA
Go to Step 6
DUPLEX
(p.136)
Replace the Go to 3.4.1
HVPS/MCU LVPS (p.111)
138
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