Checking The Environment Sensor - Canon NP6085 Service Manual

5) Set the clip for the jumper wire to the
potential sensor checking electrode.
Caution:
Take extra care never to let the clip touch
the sensor cover. Keep it sufficiently away
from the sensor window.
6) Connect one end of the jumper wire to J4-
1 of the potential measurement PCB.
7) Insert the door switch actuator into the door
switch assembly.
8) Turn ON the power switch.
Caution:
Do not touch the potential sensor once you
have turned on the power switch.
9) Select the screen showing 'DPOT' (drum
surface potential) in service mode (
10)Check to make sure that DPOT on the
message display is 0 ±30 V.
Reference:
1.If the indication is as specified in method
1 and not in method 2,
you may suspect dirt on the sensor or a
fault in the potential measurement unit.
2.If the indication is as specified in method
1 and method 2,
you may assume that the signal path and
operations from the potential sensor unit
to the microprocessor on the DC con-
troller PC are normal.
11)Turn OFF the power switch.
12)Remove the potential sensor checking
electrode.
13)Install the blank exposure lamp assembly.
14)Turn ON the power switch.
COPYRIGHT © 1996 CANON INC.
1) Start service mode (
2) Press the Reset key twice, and turn OFF the
3) Remove the environment sensor, and insert
4) Turn ON the power switch, and leave it alone
5) Start service mode (
6) Compare data A and data B.
).
1
7) Press the Reset key twice, and turn OFF the
8) Remove the environment sensor tool, and
9) Install all covers.
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATIONS AND TIMING

10 Checking the Environment Sensor

temperature/humidity on the control panel.
(Take notes of the readings.)
Data A
'RTMP' °C data A1
'HUM' % data A 2
power switch.
the environment sensor tool (FY9-3014) in its
place.
for 5 min.
temperature/humidity on the control panel.
(Take notes of the readings.)
'RTMP' °C data B1
'HUM' % data B2
• difference between data A1 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 not as indicated, replace the environment
sensor.
power switch.
insert the environment sensor.
Caution:
The environment sensor tool (FY9-3014) is
adjusted at the factory to high precision.
Keep it in an airtight case with a drying
agent.
), and check the
1
), and check the
1
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