Canon CLC 1120 Service Handbook page 53

8) Detach the laser power checker, and secure the slot cover in place.
9) Mount the left inside cover.
When Replacing the Scanning Lamp, Standard White Plate, Lamp
Regulator, Lamp Reflecting Plate, Analog Processor PCB, No. 1 Mirror
5
Base Unit, No. 1 Mirror, No. 2 Mirror Base Unit, No. 2 Mirror, No. 3 Mirror,
and CCD Unit
1) Close the front cover, and wait until the copier enters standby state. (Do not open the front
cover while CCD-ADJ is being executed.)
2) Replace the part, and execute FUNCTION>CCD>CCD-ADJ in service mode.
When 'END' appears, end the operation. If 'ERR' appears, start over.
3) Turn off and then on the power switch.
6 When Replacing the BD Unit
If you have replaced the BD unit, adjust the position as follows:
1) Set the meter range to VAC.
2) Connect the + probe to the check pin (TP301) and the - probe to the check pin GND on the BD
PCB.
3) Execute FUNCTION>LASER>POWER in service mode.
4) Loosen the screw used to secure the BD unit in place, and tighten it when the output reading of
the meter is maximum.
7 Checking the Environment Measurement PCB
The environment measurement PCB and the environment sensor are checked using the
environment measurement PCB checker (TKN-0457) and the environment sensor calibrator
(TKN-0456).
a. Checking the Environment Measurement PCB
1) Turn off the power.
2) Open the hopper.
3) Remove the environment sensor from the environment measurement PCB, and fit the
environment measurement PCB checker (TKN-0457) in its place.
4) Insert the door switch actuator, and turn on the power.
5) Set the meter range to 30 VDC.
Check to make sure that the voltage between J1-1 (+) and J1-2 (-) on the environment
measurement PCB is 24 ± 2.4 V. If not, check the DC power supply PCB(DCP1).
6) Select DISPLAY>ANALOG in service mode.
7) Check the temperature and the humidity on the ANALOG screen.
TEMP: 25 ± 5°C
ABS-HUM: 40 ± 10%
8) Check to make sure that the reading is as indicated.
If no, go to step 9).
If yes, go to step 14).
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-35