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VII. ELECTRICAL
ADJUSTMENT
When Replacing Major Parts
a. When Replacing the ROM on the DC
Controller PCB or the Reader Controller PCB
(The term "reader controller-" or the "DC con-
troller" within parentheses indicates work unique
to the respective PCB.)
Turn on the main switch.
Record the settings of the user mode. (reader
controller)
Set 'IMG-REG' on the second page of the
3)
mode from '1' to '0'. (DC controller)
Turn off the main switch.
4)
Disconnect the power plug from the power
5)
outlet. (DC controller)
Replace the two ROMs of the DC controller
and the six ROMs of the reader controller.
Connect the power plug to the power outlet,
7)
and turn on the main switch.
Execute 'RAM-CLR' of 'R-CON' under 'FUNC'
8)
in service mode so that the main switch will
automatically be off.
Turn on the main switch so that 'E350' will be
8)
indicated. (reader controller)
10) Execute 'AUTO-ADJ' of 'CCD' under 'FUNC' in
service mode. (about 8 min; reader controller)
11) If a projector is installed, execute 'PROJ-CCD'
of 'PROJ-ADJ' under 'FUNC' in service mode.
(reader controller)
12) Compare the value in A of the service label
and the service mode value; if different, or if
you replaced the DC controller PCB as a
whole, perform the steps for initializing the
RAM on the DC controller PCB shown below.
(DC controller)
Set 'IMG-REG' of 'INSTALL2' under 'FUNC' in
service mode from '0' to '1'. (DC controller)
Enter new user mode settings and the value
of B of service label. (reader controller)
15) Turn off and on the main switch.
16) Execute auto gradation correction, and set
3-312
'PASCAL under 'ADJSUT' in service mode to
b. When Replacing the Reader Controller
PCB
lnitialize the RAM on the reader controller
PCB. (See the appropriate instructions.)
Turn off and on the main switch.
C.
When Replacing the DC Controller PCB
Start service mode, and check to make sure
that 'DISP+BLT-DRFT+BELTPOS' is 'CEN-
TER'; if not, move the transfer belt to the center.
Turn off the main switch.
Disconnect the power plug from the power
outlet.
Replace the DC controller PCB.
4)
Remove the connector used for short-circuit-
5)
ing from J2237 of the old DC controller PCB;
then, install it to J2237 on the new DC con-
troller PCB.
Turn on the main switch.
6)
lnitialize the RAM on the DC controller PCB.
7)
(See the appropriate instructions.)
Turn on and then off the DC controller PCB.
8)
d.
PCB
Start service mode, and check to make sure
that 'BELT-POS' of 'BLT-DRFT' under 'DISP' is
'CENTER'; if not, move the transfer belt to the
center.
Execute 'FUNC+DC-CON+RAM-LR' In ser-
vice mode.
Turn off the main switch, and disconnect and
3)
then connect the power plug (so that the RAM
will be cleared).
Turn on the main switch.
4)
If you have replaced the DC controller PCB,
5)
replace the developer according to the
instructions on the Service handbook P2-13.
Enter the value of A recorded on the service
6)
label. (If you have changed other servlce
mode settings related to the DC controller,
enter such settings as well.)
Turn off and then on the main switch.
7)
Execute BEG-APER' of 'INSTALL2' under
8)
'FUNC' in service mode.
CANON CLClOOO REV.1 MAYlQQ7 PRINTEOINJAPAN(IMPRIMEAUJAPON)
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