Checking The Environment Measurement Pcb - Canon 1000 Service Manual

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
h. After Replacing the Pick-Up Motor/Pick-Up
Unit
1) Place three or more A4 or LTR sheets of paper
in the cassette (upper, lower).
2) Select 'FUNC > P-UP-TMG' in service mode.
3) Execute 'PK-ADJ-U' three times.
• A value near '186' will be indicated under
'DATA-A' and 'PUDT-U'.
4) Press 'D-SEND-U' to write the adjustment data
in RAM.
5) Execute 'PK-ADJ-L' three times.
• A value near '104' will be indicated under
'DATA-L' and 'PUDT-L'.
6) Press 'D-SEND-L' to write the adjustment data
in RAM.
7) Write the value of 'PUDT-U/L' on the service
label.
8) End service mode.
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COPYRIGHT © 2001 CANON INC.
2 Checking the Environment
Measurement PCB
The condition of the environment measurement
PCB and the environment sensor is checked using
the environment measurement checking tool
(TKN-0457) and the environment checking tool
(TKN-0456).
a. Checking the Environment Measurement
PCB
1) Turn off the power switch.
2) Remove the multitray covers 1 and 2.
3) Remove the environment sensor from the en-
vironment measurement PCB, and insert the
environment measurement checking tool
(TKN-0457) in its place.
4) Turn on the power switch.
5) Set the meter to the 30 VDC range, and check
to make sure that the voltage of J1-1 (+) and
J1-2 (–) on the environment measurement
PCB is 24 V ±2.4V. If not, check the DC power
supply PCB (DCP1).
6) Start service mode, and select 'DISPLAY'.
7) Check the temperature and humidity on the
ANALOG screen.
BODY °C ............ 25 ±5
BODY % ............ 40 ±10
8) Check to make sure that the reading is within
specification.
If not, go to step 9). If the reading is as indi-
cated, go to step 14).
9) Press the Reset key, and turn off the power
switch.
10) Disconnect J1 of the environment measure-
ment PCB.
11) Turn on the power switch; start service mode,
and select 'DISPLAY'.
12) Check the temperature and humidity on the
ANALOG screen.
BODY °C ............ 25 ±5
BODY % ............ 36 ±10
13) Check to make sure that the reading is as indi-
cated.
If the reading is not as indicated, sus-
pect a fault in the DC controller.
REF.
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)