Checking The Environment Sensor - Canon imageRUNNER 7095 Service Manual

Chapter 14
[2]
F-14-48
8) Connect the cable [1] of the potential sensor
checker electrode to the frame (GND) [2] of the
machine.
Never bring the clip into contact with the sensor
cover. Be sure to keep it fully away from the sen-
sor window.
F-14-49
9) Fit the door switch actuator into the door
switch assembly.
10) Turn on the power switch.
Once you have turned on the power switch, do not
touch the potential sensor assembly.
11) Make the following selections in service
mode, and check to make sure that the reading
is between 0 and 30 during initial rotation:
COPIER> DISPLAY> DPOT> DPOT-K.
MEMO:
1. If the reading is as indicated in Method 1 but is
not in Method 2, suspect dirt on the sensor or a
fault in the potential measurement unit.
2. If the reading is as indicated in both Method 1
and Method 2, assume that the signal path and
the operation from the potential sensor unit to
the microprocessor on the DC controller PCB
are normal.
12) Turn off the power switch.
13) Remove the potential sensor checker
electrode.
14-24
[1]
[2]
[1]
14) Mount the potential sensor support plate.
15) Turn on the power switch.

14.7.9 Checking the Environment Sensor

1) Checking the Environment Sensor
Make the following selections in service mode,
and check and record the temperature/
humidity indicated on the screen in the control
panel: COPIER > DISPLAY > ANALOG.
Data A
'TEMP' deg C ........... data A1
'HUM' % ........... data A2
2) Press the Rest key twice to turn off the power
switch.
3) Remove the environment sensor, and fit the
environment sensor jig (FY9-3014) in its place.
4) Turn on the power switch, and leave the
machine alone for 5 min.
5) Make the following selections in service mode,
and check and record the temperature/
humidity indicated on the screen in the control
panel: COPIER > DISPLAY > ANALOG:
Data B
'TEMP' deg C ........... data B1
'HUM' % ........... data B2
6) Compare data A and data B.
- difference between data A 1 and data B1 is 0 -/
+ 5
- difference between data A2 and data B2 is 0 -/+
20
If the difference between data A and data B is out-
side the range, replace the environment sensor.
7) Press the Reset key twice, and turn off the
power switch.
8) Detach the environment sensor jig, and fit the
environment sensor.
9) Put back all covers.
The environment sensor jig (FY9-3014) is pre-
cisely adjusted at the factory.
Be sure to keep it in an air-tight case with a drying
agent.
0010-9333