Epson AcuLaser C2800 Service Manual page 108

AcuLaser C2800/C2800D/C3800/C3800D
FIP 1-29 Service Req E610 (Environment Sensor Error)
Possible parts that caused the error
SENSOR HUM
HARNESS ASSY HUM
PWBA OHP SNR
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 PWBA OHP
2
SNR
Check the connection state between PWBA
OHP SNR and PWBA MCU.
Are P/J2411, P/J241, and P/J24 connected
correctly?
Check the continuity of the HARNESS ASSY
3
OHP SNR
Is the continuity between P/J2411 <=> P/J241
normal?
Check the continuity of the HARNESS ASSY
4
OHP
Is the continuity between P/J241 <=> P/J24?
Replace of the PWBA OHP SNR
5
Replace the PWBA OHP SNR.
Was the trouble fixed?
Replace of the PWBA MCU
6
Replace the PWBA MCU. (p.343)
Was the trouble fixed?
Check the connection of the SENSOR HUM
7
Check the connection state between SENSOR
HUM and PWBA MCU.
Are P/J261 and P/J26 connected correctly?
TROUBLESHOOTING
HARNESS ASSY OHP SNR
HARNESS ASSY OHP
PWBA MCU
Yes No
Go to Step [2]. End of procedure
Go to Step [3]. Reconnect
P/J2411, P/J241,
and P/J24
correctly.
Go to Step [4]. Replace the
HARNESS
ASSY OHP SNR.
Go to Step [5]. Replace the
HARNESS
ASSY OHP.
End of procedure Go to Step [6].
End of procedure Go to Step [7].
Go to Step [8]. Reconnect P/J261
and P/J26
correctly.
Engine-related Trouble FIP
Step Check
Check the continuity of the HARNESS ASSY
8
HUM
Is the continuity between P/J261 <=> P/J26
normal?
Check the power voltage supply to SENSOR
9
HUM.
Measure the voltage between PWBA MCU
ground <=> P/J26-4PIN.
Is the power voltage (approx. +5 V) output?
Revision C
Yes No
Go to Step [9]. Replace the
HARNESS
ASSY HUM.
Replace the Replace the
SENSOR HUM. PWBA MCU.
(p.343) (p.343)
108
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