Epson AcuLaser C8500 Service Manual page 423

EPSON AcuLaser C8500
FIP-1.41 No Power FIP-1.41 No Power FIP-1.41 No Power FIP-1.41 No Power
Step
*Initial setting
Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt,
adherence of foreign matter?
1
*Main parts to check
P/H HARNESS ASSY, REGI. HARNESS ASSY
MAIN HARNESS ASSY, MCU PWB
*Printer controller check
Disconnect the printer controller, and turn the power ON after waiting 2 - 3 minutes.
Is the voltage between the pins as follows?
2 P33-6PIN<=>P33-8PIN
P33-5PIN<=>P33-7PIN
P33-3PIN<=>P33-4PIN
• Check if the source voltage of each part is shorted.
*Source voltage short check
Disconnect the connectors other than J12 and J21 on the MCU PWB.
Disconnecting each connector and turn the power ON after waiting 2 - 3 minute.
Is the voltage 5VDC between the following pins?
3
P33-6PIN<=>P33-8PIN
P33-5PIN<=>P33-7PIN
P33-3PIN<=>P33-4PIN
• Check if source voltage of each part is shorted.
Troubleshooting
Check
Level 1 FIP (Fault Isolation Procedure)
Treatment
Yes
Replace and remount
Go to step 2.
the concerned part(s).
Printer controller check
(If an error still occurs
Go to step 3.
after replacing, go to
step 3.)
Replace the part(s) for
which source voltage is Replace the MCU PWB.
shorted.
Revision C
No
5-71