Canon ImageRunner iR8500 Series, Service Manual, Page: 697 / 1122

Chapter 14
14-43
F-14-105
8) Connect the cable [1] of the potential sensor checking electrode to the
frame (GND) [2] of the machine.
Be sure to allow enough space from the sensor window so that the clip
will never come into contact with the sensor cover.
F-14-106
9) Fit the door switch actuator into the door switch assembly.
10) Turn on the power switch.
After turning on the power switch, do not touch the potential sensor
assembly.
11) Make the following selections in service mode, and check to see that
the reading for initial rotation is between 0 and 30:
COPIER>DISPLAY>DPOT>DPOT-K.
REF:
1. If the reading in method 1 is as indicated but the reading in method 2
is not as indicated,
Suspect dirt on the sensor or a fault in the potential measurement unit.
2. If the readings in both methods 1 and 2 are as indicated,
It is safe to assume that the operation and the signal path from the
potential sensor unit to the microprocessor on the DC controller PCB are
normal.
12) Turn off the power switch.
13) Detach the potential sensor checking electrode.
14) Mount the potential sensor support plate.
15) Turn on the power switch.
14.7.18 Checking the Environment Sensor
0007-0793
iR105i/iR105+ / iR9070
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
'RTMP' deg C ........... data A1
'RHUM' % ........... 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
'RTMP' deg C ........... data B1
'RHUM' % ........... 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 outside 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 precisely adjusted at the
factory.
Be sure to keep it in an air-tight case with a drying agent.
14.7.19 Checking the Environment Sensor
0008-8545
/ iR85+ / iR8070
1) Make the following selections in service mode:
COPIER>DISPLAY>ANALOG. Then,
check and record the temperature and humidity readings on the control
panel display.
(data A)
'RTMP' deg C ....... data A1
'RHUM' % ....... data A2
2) Press the Reset key twice, and turn offf the power switch.
3) Remove the environment sensor, and fit the environment sensor jig
(FY9-3014) in place.
4) Turn on the power switch, and leave the machine alone for 5 min.
5) Make the following selections in service mode:
COPIER>DISPLAY>ANALOG. Then, check and record the
temperature and humidity readings on the control panel display.
(data B)
'RTMP' deg C ....... data B1
'RHUM' % ....... data B2
6) Compare data A and data B.
- The difference between data A1 and data B1 is 0 ±5.
- The difference between data A2 and data B2 is 0 ±20.
If the difference between data A and data B is not as indicated, replace
the environment sensor.
7) Press the Reset key twice, and turn offf the power switch.
8) Detach the environment sensor jig, and fit the environment sensor.
9) Attach all covers.
The environment sensor jig (FY9-3014) is adjusted at the factory to a
high level of accuracy. Be sure to put it in a sealed case with a drying
agent for storage.
14.7.20 Checking the Photointerrupters
0007-0796
iR105i/iR105+ / iR9070
[1]
[2]
[1]
[2]