Canon GP160F Service Manual page 169

4. Jumper plugs
The image processor PCB has been equipped with a jumper plug. This acts to pre-
vent the depletion of the back up batteries.
The function of the jumper plug (JP1) is to help prevent the consumption of the bat-
teries. Service parts processor PCB's come with jumper plug (JP1), set to the OFF posi-
tion, and without jumper plug (JP3). Consequently, when the image processor PCB
needs to be replaced, please set the JP1 to the ON position. When the JP3 is being
replaced, it is necessary to remove it from the board prior to replacement, and mount it
on the new board.
When the above operation is performed, and the power supply of the main unit is
switched back on, the message "PRESS SET KEY" appears on the display. Please
press the set key found on the control panel, which will re-set the SRAM (IC36, IC37) to
the factory settings. The unit will go into stand-by mode. The control data can be re-
entered at this point.
:
Caution
The function of the vanadium lithium secondary battery (BAT1) is to back up transmit-
ted and received faxed image data. Accordingly, if the main unit has not been
equipped with a fax function, it is not necessary to change the JP1 to the ON posi-
tion.
Should a fax be added to the main unit as an accessory, the JP1 must be changed to
Jumper plug (JP1)
Vanadium lithium
secondary battery
(BAT1)
COPYRIGHT © 1999 CANON INC.
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Figure 9-403
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 9 EXTERNAL/AUXILIARY MECHANISM
Image processor PCB
Jumper plug (JP3)
Lithium battery
(BAT2)
9-11