Service manual

Chapter 12
12-5
12.4 Electrical Components
12.4.1 Outline
0006-4138
You need to make the following adjustments
whenever you have replaced the machine's major
parts.
Be sure to make the appropriate adjustments if you
have replaced a specific major part.
- Image processor PCB
all adjustments, including ADF adjustment
- Contact sensor
contact sensor LED intensity auto adjustment
To replace the image processor PCB, be sure to work
according to the instructions given for the
replacement of the image processor PCB.
12.4.2 When Replacing the
Image Processor PCB
0006-4229
Perform the following if you have replaced the image
processor PCB:
Before Starting the Work
1) If the machine is equipped with fax functions, print
out the following and all received images: system
data list, 1-touch/speed/group dial list, user data
list, activity report, system dump list.
2) Turn off the power.
F-12-5
When the jumper plug (JP1) is removed, all data in
control memory will be lost. Therefore, do not
disconnect the jumper plug (JP1). The data stored in
the SRAM is as follows:
- user data (data indicating user mode settings)
- service mode deta (data indicating service mode
settings)
- control data (communications control record of most
recent 20 communications, system dump record)
After Finishing the Work
1) Connect the jumper plug (JP1) of the image
processor PCB (service part; one side of the pin is
disconnected; try connecting both its feet).
2) Turn on the power; then, when 'DATA ERROR' is
indicated, press the Set key.
3) Enter the user data and the service mode data.
4) Make various adjustments for the electrical system
of the machine.
5) If the machine is equipped with ADF functions,
make various adjustments for the ADF.
Vanadium lithium
secondary battery
(BAT2)
Lithium battery
(BAT1)
Jumper plug
(JP1)