Epson AcuLaser C8500 Service Manual page 449

EPSON AcuLaser C8500
FIP-2.17 Faulty ROS ASSY FIP-2.17 Faulty ROS ASSY FIP-2.17 Faulty ROS ASSY FIP-2.17 Faulty ROS ASSY
Step
*Initial setting
Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt,
adherence of foreign matter?
*Main parts to check
1
ROS ASSY, MAIN HARNESS ASSY, EXIT HARNESS,
TOP EXIT SENSOR, FRONT COVER SWITCH R,
MAIN HARNESS, MCU PWB
*SOS SENSOR power supply check
2
Is the voltage between P14-1PIN <=> P14-3PIN 5VDC?
*SOS detection signal power supply check
3
Is the voltage between P14-2PIN <=> P14-3PIN 5VDC?
*Scanner Motor operation check
4 Does the Scanner Motor run when turned ON?
• Check by listening.
*Scanner Motor power supply check
5
Is the voltage between P14-10PIN <=> P14-11PIN ?
*Scanner Motor ON signal check
6
Does the voltage between P14-12PIN <=> P14-13PIN change from 24VDC to 0VDC when the
Scanner Motor is turned ON?
*LDD power supply check
7
Is the voltage between P33-1PIN <=> P33-2PIN 5VDC?
*LDD power supply continuity check
8
Is there a continuity between J33-1PIN <=> J33-2PIN?
Troubleshooting
Check
Level 2 FIP (Fault Isolation Procedure
Treatment
Yes No
Replace and remount
Go to step 2.
the concerned part(s).
Go to step 3. Go to FIP-2.1
Replace the MCU
Go to step 4.
PWB.
Go to step 7. Go to step 5.
Go to step 6. Go to FIP-2.2
Go to step 7. Go to step 15.
Go to step 8. Replace the LVPS.
Go to step 15. Go to step 9.
Revision C
5-97