Epson AcuLaser C2800 Service Manual page 106

AcuLaser C2800/C2800D/C3800/C3800D
FIP 1-27 Service Req E550 (Fan Motor Failure)
Possible parts that caused the error
FAN MAIN
FAN DUP
HARNESS ASSY LV TOP
Troubleshooting
Step Check
Check after turning the power OFF and ON.
1
Does the error recur even when the power is
turned off and back on again?
Check the connection of the FAN MAIN and
2
the FAN DUP
Check the connection state of the following
items.
FAN MAIN - LVPS
FAN DUP - PWBA DUP
Are P/J503 and P/J427 connected correctly?
Check the power voltage supply to FAN
3
DUP.
Measure the voltage between PWBA DUP
ground <=> P/J427-1PIN.
Is the power voltage (+24 V) output?
4 Check the connection between PWBA DUP
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?
Check the continuity of the HARNESS ASSY
5
DUP UNIT
Is there normal continuity between P/J428 and
P/J2720?
Check the continuity of the HARNESS ASSY
6
FRONT COVER
Is there normal continuity between P/J2720 and
P/J272?
TROUBLESHOOTING
LVPS
PWBA MCU
Yes No
Go to Step [2]. End of procedure
Go to Step [3]. Reconnect FAN
MAIN (P/J503)
and FAN DUP (P/
J427) correctly.
Replace the FAN Go to Step [4].
DUP. (p.349)
Go to Step [5]. Reconnect the
P/J428, P/J2720,
P/J272, and P/J27
correctly.
Go to Step [6]. Replace the
HARNESS
ASSY DUP
UNIT.
Go to Step [7]. Replace the
HARNESS
ASSY FRONT
COVER.
Engine-related Trouble FIP
Step Check
Check the continuity of the HARNESS ASSY
7
R SIDE
Is the continuity between P/J27 <=> P/J2720
normal?
Check the power voltage supply to PWBA
8
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?
Replace of the PWBA DUP
9
Replace the PWBA DUP. (p.349)
Was the trouble fixed?
Check the power voltage supply to FAN
10
MAIN
Measure the voltage between LVPS ground <=>
P503-1PIN.
Is the power voltage (+24 V) output?
11 Check the continuity of the HARNESS ASSY
LV TOP
Is the continuity between P/J14 <=> P/J501
normal?
Check the power voltage output from the
12
LVPS.
1. Measure the voltage between LVPS
ground <=> P503-1PIN.
2. Close the interlock switch (HARNESS
ASSY INTERLOCK) before performing
the following work.
Is the power voltage (approx. +24 V) output?
Revision C
Yes No
Go to Step [6]. Replace the
HARNESS
ASSY R SIDE.
Go to Step [9]. Replace the
PWBA MCU.
(p.343)
End of procedure Go to Step [10].
Replace the FAN Go to Step [11].
MAIN. (p.327)
Go to Step [12]. Replace the
HARNESS
ASSY LV TOP.
Replace the Replace the
PWBA MCU. LVPS. (p.327)
(p.343)
106
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