Epson AcuLaser C2800 Service Manual page 130

AcuLaser C2800/C2800D/C3800/C3800D
FIP 2-15 DUP JAM SENSOR
Possible parts that caused the error
DUP JAM SENSOR
HARNESS ASSY DUP SNR
HARNESS ASSY DUP UNIT
HARNESS ASSY FRONT COVER
Troubleshooting
Step Check
Check the connection of the DUP JAM
1
SENSOR
Check the connection state between DUP JAM
SENSOR and PWBA DUP.
Are P/J430 and P/J4301 connected correctly?
Check the continuity of the HARNESS ASSY
2
DUP SNR
Is the continuity between P/J430 <=> P/J4301
normal?
Check the power voltage supply to DUP JAM
3
SENSOR
Measure the voltage between PWBA DUP
ground <=> P/J430-1PIN.
Is the power voltage (approx. +3.3 V) output?
Check the operation of the DUP JAM
4
SENSOR
Measure the voltage between PWBA DUP
ground <=> P/J430-3PIN.
Does the voltage change when the DUP JAM
SENSOR is shielded from light?
Check the connection between PWBA DUP
5
and PWBA MCU
Check the connection state between PWBA
DUP and PWBA MCU.
Are P/J428, P/J2720, P/J272, and P/J27
connected correctly?
TROUBLESHOOTING
HARNESS ASSY R SIDE
PWBA DUP
PWBA MCU
Yes No
Go to Step [2]. Reconnect P/J430
and P/J4301
correctly.
Go to Step [3]. Replace the
HARNESS
ASSY DUP SNR.
Go to Step [4]. Go to Step [5].
Go to Step [5]. Replace the DUP
JAM SENSOR.
(p.349)
Go to Step [6]. Reconnect
P/J428, P/J2720,
P/J272, and P/J27
correctly.
Engine-related Trouble FIP
Step Check
Check the continuity of the HARNESS ASSY
6
DUP UNIT
Is the continuity between P/J428 <=> P/J2720
normal?
Check the continuity of the HARNESS ASSY
7
FRONT COVER
Is the continuity between P/J2720 <=> P/J272
normal?
Check the continuity of the HARNESS ASSY
8
R SIDE
Is the continuity between P/J27 <=> P/J272
normal?
Check the power voltage supply to PWBA
9
DUP
1. Close the interlock switch (HARNESS
ASSY INTERLOCK) before performing
the following work.
2. Measure the voltage between PWBA
MCU ground <=> P/J27-A17, A18PIN.
Is the power voltage (approx. +24 V) output?
Revision C
Yes No
Go to Step [7]. Replace the
HARNESS
ASSY DUP
UNIT.
Go to Step [8]. Replace the
HARNESS
ASSY FRONT
COVER.
Go to Step [9]. Replace the
HARNESS
ASSY R SIDE.
Replace the Replace the
PWBA DUP. PWBA MCU.
(p.349) (p.343)
130
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