Epson ColorPage EPL-C8000 Service Manual page 425

EPSON EPL-C8000
FIP-2.25 TRO SENSOR is Defective
Step Check point
Perform the preliminary inspection.
1 Parts to inspect:
TRO SENSOR, MAIN HARNESS ASSY, MCU PWB
Check: Power supply to the TRO SENSOR
l
2
Is the voltage level correct at the pins below?
- P17-12PIN<=>P17-14PIN: 5VDC
Check: Power supply to the TRO detection signal
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3
Is the voltage level correct at the pins below?
- P17-13PIN<=>P17-14PIN: 5VDC
Check: TRO detection signal
l
Is the voltage level correct depending on the conditions
below?
- Pins: P/J17-13PIN<=>P/J17-14PIN
4
- Reflecting condition: 0VDC
(TRO mark in the IBT BELT ASSY is detected.)
- Unreflecting condition: 5VDC
(Area other than TRO mark in the IBT BELT ASSY is
detected.)
Check: MAIN HARNESS ASSY electrical continuity
l
Does the MAIN HARNESS ASSY have proper
5
continuity at the pins below?
- J116<=>J18
Chapter 5 TROUBLESHOOTING
Remedy
Yes
Replace/reinstall the defective part(s).
Go to Step 3.
Go to Step 4.
Replace the MCU PWB.
Replace the TRO SENSOR.
No
Go to Step 2.
Go to FIP-2.1 "LVPS 5VDC is
Defective".
Replace the MCU PWB.
Go to Step 5.
Replace the MAIN HARNESS.
Rev. B
5-91