Arrangement Of The Electrical Parts; Checking The Photointerrupters - Canon SmartBase PC1200s Service Manual

CHAPTER 7 TROUBLESHOOTING

6 Arrangement of the Electrical Parts

6.1 Checking the Photointerrupters

Use 'SENSOR' under 'TEST MODE' in service mode to check photointerrupters as fol-
lows:
1) Press the Additional Functions key and the # key to start service mode.
2) Press the Left/Right Arrow key so that 'TEST MODE' is indicated.
3) Press '6' on the keypad so that '6: FACULTY TEST' is indicated.
4) Press '3' on the keypad to start sensor check mode, in which the following screen ap-
pears:
5) When the screen shown in F07-601-01 is displayed, press '1', '2', '3', or '4' to bring up the
State screen of a specific sensor. For instance, when '1' is pressed, the following will be true:
DS of DES of DOC A4
CRG on DCVS on
'DS of' indicates that the original sensor (DS) of the ADF is OFF.
6) Move the flag of the sensor to see that the indication alternates between 'of' and 'on' to
indicate that the sensor is going OFF and ON.
On the next page, the screens that appear when '1' through '4' are pressed are shown to-
gether with the sensor names and the sensor states when the machine is in standby state.
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COPYRIGHT © 2001 CANON INC.
6-3:SENSOR
[1] - - - [7]
F07-601-01
F07-601-02
2000 2000 2000 2000
Sensor name
Sensor name
CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
Present state
of the sensor
Present state
of the sensor