The Pre-Exposure Lamp Fails To Go On; The Scanning Lamp Fails To Go On - Canon iR105 Service Manual

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4.1.80 The pre-exposure lamp fails to go ON

Pre-exposure lamp PCB

1) Select the following in service mode: COPIER>I/O>IP. Does the

YES: Check the wiring from DC controller PCB to the pre-exposure

DC controller PCB, Pre-exposure lamp PCB

2) Set the meter range to 300 VDC. Does the voltage between J504-A1

YES: Check the wiring from the DC controller PCB to the pre-exposure

1) Make the following selections in service mode:

YES: The connector may have poor contact. Check the connector.

2) Is the scanning lamp (LA1) mounted correctly?

3) Measure the voltage of J1001-1 on the inverter PCB. Is it 38 V?

Inverter PCB, Reader controller PCB

4) Measure the voltage of J1109-B11 on the reader controller PCB.

YES: If the wiring is normal, replace the inverter PCB.

state of bit 0 at address P016 change from '0' to '1' when the Start

key is pressed?

lamp PCB; if normal, replace the pre-exposure lamp.

(+) on the DC controller PCB and GND change from 0 to 24 V

when the Start key is pressed?

Replace the DC controller PCB.

lamp PCB; if normal, replace the pre-exposure lamp PCB.

COPIER>FUNCTION>MISC-R>SCANLAMP. Does the scanning

lamp remain ON for 3 sec when the OK key is pressed?

Disconnect the power plug from the power outlet, and mount the

lamp correctly.

Check the AC line up to the relay PCB; if normal, replace the relay

Does it change from 5 to 0 V when the control panel power switch is

If the wiring is normal, replace the DC controller PCB.

2000 2000 2000 2000

CHAPTER 6 TROUBLESHOOTING

CANON iR105 REV.0 JULY 2001

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