Canon imageRUNNER ADVANCE C2020, Service Handbook

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CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-22P
6.3 Checking the Environment Measurement PCB
The environment measurement PCB and the environment sensor are checked using the
environment measurement PCB checking tool (TKN-0457) and the environment sensor cali-
brating tool (TKN-0456).
a. Checking the Environment Measurement PCB
1) Turn off the main power switch.
2) Remove the manual feed inside cover.
3) Detach the environment sensor from the environment measurement PCB; in its place, fit
the environment measurement PCB checking tool (TKN-0457).
4) Turn on the main power switch.
5) Set the meter range to 30 VDC, and check to see that the voltage between J1-1 (+) and
J1-2 (-) of the environment measurement PCB is 24 ± 2.4 V.
If not, check the connector for connection; if normal, suspect a fault in the DC controller
PCB.
6) Make the following selections in service mode: COPIER>DISPLAY>ANALOG.
7) Check the temperature and humidity on the ANALOG screen.
TEMP: 25 ± 5°C
HUM: 40 ± 10%
8) Check to see if the readings are as indicated. If so, go to step 14).
9) Press the Reset key to end service mode, and turn off the main power switch.
10) Disconnect J1 of the environment measurement PCB.
11) Turn on the main power switch, make the following selections in service mode:
COPIER>DISPLAY>ANALOG.
12) Check the temperature and humidity on the ANALOG screen.
TEMP: 25 ± 5°C
HUM: 40 ± 10%
13) Check to see that the readings are as indicated.
Memo
If the readings are not as indicated, suspect a fault in the DC controller
PCB.
14) Press the Reset key to end service mode.
15) Turn off the main power switch.
16) Connect J1 to the environment measurement PCB.
17) Detach the environment measurement PCB checking tool from the environment mea-
surement PCB; then, mount the environment sensor.
18) Mount all covers.