Checking The Environment Measurement Pcb - Canon CLC5000 Service Manual

CHAPTER 5 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
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.

2.10.2 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 sensor
for the environment checking sensor (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 environment measurement PCB, and insert the
sensor for the environment measurement checking sensor (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 ....... 5 ±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 indicated, go to step 14).
9) Press the Reset key, and turn off the power switch.
10) Disconnect J1 of the environment measurement 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 % ........ 26 ±10
13) Check to make sure that the reading is as indicated.
If the reading is not as indicated, suspect a fault in the DC controller.
REF.
5-58
P-UP-TMG' in service mode.
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001