Sensor Dup - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.30 SENSOR DUP

Table 3-89. Troubleshooting for SENSOR DUP
Step Action and Question
Parts below can be the source of this error

• SENSOR DUP

(p.350)
• ACTUATOR DUP
• HARNESS ASSY DUP SNR
• PWBA DUPLEX
(p.347)
• COVER HARNESS, HARNESS ASSY DUP
• HVPS/MCU
(p.301)
• LVPS
(p.287)
• HARNESS ASSY LVPS
ACTUATOR DUP
♦
Does the ACTUATOR DUP operate smoothly in
1
such a way that the flag enters the sensing area of the
sensor when there is no paper on the Option Duplex
and the flag leaves the sensing area when there is
paper?
SENSOR DUP(1)
1. Remove the Imaging Cartridge.
2. Close the COVER OPEN.
3. Open the COVER HSG DUP and hold it in the
opened position.
2
4. While moving the ACTUATOR DUP, measure the
voltage between P/J53-3 ↔ P/J53-2 on the PWBA
DUPLEX.
♦ Is the voltage between P/J53-3 ↔ P/J53-2 on the
PWBA DUPLEX 0 VDC when the ACTUATOR
DUP is pushed, and 3.3 VDC when it is released?
SENSOR DUP (2)
3
1. Replace the SENSOR DUP. (p.350)
♦
Does the problem still occur?
Troubleshooting
Yes No
(Chapter 4 Disassembly and
Assembly)
(p.359)
Replace the
Go to Step 2 ACTUATOR
DUP
Replace the
Go to Step 3
HVPS/MCU
Problem
Go to Step 4
solved
Troubleshooting for Individual Units
Table 3-89. Troubleshooting for SENSOR DUP (continued)
Step Action and Question
Continuity of the HARNESS ASSY DUP SNR
1. Remove the SENSOR DUP. (p.350)
2. Disconnect P/J53 from the PWBA DUPLEX.
4
3. Check the wiring between J53 ↔ J530 for
continuity.
♦ Does each wiring between J53 ↔ J530 have
continuity?
HARNESS ASSY DUP
1. Disconnect the HARNESS ASSY DUP.
5
↔
2. Check continuity between J50
♦
Is there continuity between J50
HARNESS ASSY LVPS
1. Disconnect the HARNESS ASSY LVPS.
6
↔
2. Check continuity between J27
♦
Is there continuity between J27
Continuity of the HVPS/MCU
7 1. Disconnect P/J11 from the HVPS/MCU.
2. Check continuity between P11-16 ↔ P27-4.
♦ Is there continuity between P11-16 ↔ P27-4?
Revision C
Yes
Replace the
HARNESS
Go to Step 5
ASSY DUP
SNR
Replace the
Go to Step 6 HARNESS
J2750.
ASSY DUP
↔
J2750?
Replace the
Go to Step 7 Harness Assy
J2750.
LVPS
↔
J2750?
Go to 3.4.1 Replace the
LVPS (p.111) HVPS/MCU
Confidential
No
137