Epson AcuLaser C8500 Service Manual page 408

EPSON AcuLaser C8500
FIP-1.27 Environment (humidity) sensor malfunction FIP-1.27 Environment (humidity) sensor malfunction FIP-1.27 Environment (humidity) sensor malfunction FIP-1.27 Environment (humidity) sensor malfunction
Step
*Initial setting
Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence
of foreign matter?
1
*Main parts to check
ENVIRONMENT SENSOR, P/H HARNESS ASSY
MCU PWB
*Engine and controller division check
2
Can a test print (single sheet / consecutive printing, about 10 sheets each) be performed normally
with the engine alone?
*ENVIRONMENT SENSOR thermistor resistance check
3
Is the resistance between J105-1PIN <=> J105-2PIN approx. 5kΩat a room temperature?
*P/H HARNESS ASSY continuity check
4
Is there a proper continuity between J071 <=> J105?
Troubleshooting
Check
FUSER FAN-1 Error
Level 1 FIP (Fault Isolation Procedure)
Treatment
Yes
With tool:
Go to step 2.
Without tool:
Replace and remount
Go to step 3.
the concerned part(s).
Replace the MCU PWB. Go to step 3.
Replace the
Go to step 4. ENVIRONMENT
SENSOR.
Replace the P/H
Replace the MCU PWB
HARNESS ASSY.
Revision C
No
5-56