S/W Rear Cover - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.36 S/W REAR COVER

Table 3-95. Troubleshooting for S/W REAR COVER
Step Action and Question
Parts below can be the source of this error

• S/W REAR COVER

• HARNESS ASSY REAR COVER
• PWBA OCT
(p.368)
• HARNESS ASSY OCT2
• HVPS/MCU
(p.301)
• LVPS
(p.287)
• HARNESS ASSY OCT1
Continuity of S/W REAR COVER (1)
1. Disconnect the S/W REAR COVER.
1
♦ Is there continuity between J740-2 ↔ J740-1 when
the S/W REAR COVER is pushed, and no
continuity when it is released?
Continuity of HARNESS ASSY REAR COVER
2
1. Disconnect the HARNESS ASSY REAR COVER.
Is there normal continuity between J74 ↔ J740?
♦
HARNESS ASSY OCT2
1. Disconnect P/J 70 on the PWBA OCT
3
2. Disconnect the HARNESS ASSY OCT2.
Is there normal continuity between J70 ↔ J3070?
♦
Continuity of HARNESS ASSY OCT1
4
1. Disconnect the HARNESS ASSY OCT1.
Is there normal continuity between J30 ↔ J3070?
♦
S/W REAR COVER (2)
5 1. Remove the Imaging Cartridge.
Is the voltage between J30-4 ↔ P/J30-3 on the
♦
HVPS/MCU 3.3 VDC?
Continuity of HVPS/MCU
6 1. Disconnect P/J30 on the PWBA OCT.
Is there normal continuity between P30-4 ↔ P11-
♦
16?
Troubleshooting
Yes No
(Chapter 4 Disassembly and
Assembly)
Replace the S/
Go to Step 2 W REAR
COVER
Replace the
HARNESS
Go to Step 3
ASSY REAR
COVER
Replace the
Go to Step 4 HARNESS
ASSY OCT2
Replace the
Go to Step 5 HARNESS
ASSY OCT1
Go to 3.4.32
PWBA OCT Go to Step 6
(p.139)
Go to 3.4.1 Replace the
LVPS (p.111) HVPS/MCU
Troubleshooting for Individual Units
Revision C
141
Confidential