Epson AcuLaser C8500 Service Manual page 439

EPSON AcuLaser C8500
FIP-2.7 Faulty EMPTY SENSOR FIP-2.7 Faulty EMPTY SENSOR FIP-2.7 Faulty EMPTY SENSOR FIP-2.7 Faulty EMPTY SENSOR
Step
*Initial setting
Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt,
adherence of foreign matter?
1
*Main parts to check
EMPTY SENSOR, MSI HARNESS ASSY
REGI. HARNESS ASSY, P/H HARNESS ASSY, MCU PWB
*EMPTY SENSOR power supply check
2
Is the voltage between P20-3PIN <=> P20-4PIN 5VDC?
*EMPTY detection signal power supply check
3
Is the voltage between P20-5PINH <=> P20-4PIN 5VDC?
*EMPTY detection signal check
Is the voltage between P/J020-14PIN <=> P/J20-4PIN when (paper) and 5VDC when (no
paper)?
4
Is the voltage between P/J16-32PIN <=> P/J16-31PIN as follows?
When
When
*MSI HARNESS ASSY continuity check
5
Is there a proper continuity between J206 <=> and P205?
*REGI. HARNESS ASSY continuity check
6
Is there a proper continuity between J205 <=> J201?
*P/H HARNESS ASSY continuity check
7
Is there a proper continuity between P201 <=> J20?
Troubleshooting
Check
(paper), the value is 0VDC.
reflecting
(no paper), the value is 5VDC.
not reflecting
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.
Replace the MCU
Go to step 5.
PWB.
Replace the MSI
Go to step 6.
HARNESS ASSY.
Replace the REGI.
Go to step 7.
HARNESS ASSY.
Replace the EMPTY Replace the P/H
SENSOR. HARNESS ASSY.
Revision C
5-87