Epson AcuLaser C8500 Service Manual page 407

EPSON AcuLaser C8500
FIP-1.26 FIP-1.26 Fuser Unit malfunction (Low temperature/ Lamp) FIP-1.26 FIP-1.26 Fuser Unit malfunction (Low temperature/ Lamp) Fuser Unit malfunction (Low temperature/ Lamp) Fuser Unit malfunction (Low temperature/ Lamp)
Step
*Initial setting
Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt,
adherence of foreign matter?
*Main parts to check
1
FUSER ASSY, MCU PWB, FUSER HARNESS ASSY
FUSER CONNECTOR, FUSER ASSY, TEMP. SENSOR ASSY
H/R HEATER, P/R HEATER, LVPS, 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?
*TEMP. SENSOR ASSY check
3
Does the problem occur as soon as the power is turned ON?
*H/R HEATER, P/R HEATER check
4
Do the H/R HEATER and P/R HEATER light when the FUSER ASSY is cold and the power is
turned ON?
5 Does the problem occur during the FUSER warm up?
*MAIN HARNESS ASSY check
6
Is there a proper conductivity between J21 <=> J33?
*LVPS check
7
Is the voltage between P21-3PIN <=> P21-2PIN 4.5VDC?
*HEATER ROD ON signal check
Is the voltage between P/J33-12PIN <=> P/J33-13PIN as follows?
8
The value is 0VDC during the FUSER warm-up.
The value changes from 0VDC to 5.5VDC when the warm-up is completed?
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.)
Go to FIP-2.27 Go to step 4.
Replace the H/R
Go to step 5. HEATER and the P/R
HEATER.
Go to FIP-2.27 Go to step 6.
Replace the MAIN
Go to step 7.
HARNESS ASSY.
Go to step 8. Replace the LVPS.
Replace the LVPS. Replace the MCU PWB.
Revision C
No
5-55