Canon GP160DF Service Manual page 168

CHAPTER 9 EXTERNAL/AUXILIARY MECHANISM
Reference:
1. A DRAM check will erase all the image data; therefore, prior to performing a
DRAM check, please be sure to print the image data. To perform a check on the
DRAM, press: SERVICE MODE>TEST MODE>1:DRAM.
2. If a memory clear report automatically prints out when the power switch of the
main unit is turned on, the data on the list are the image data the unit was unable
to save, and which were deleted.
After this list is printed, the system automatically deletes the stored management
information. An example of a memory clear report is displayed below in diagram 9-
401.
3. Lithium battery (BAT2)
• Types of data this battery backs up: Control data (User data, activity management
data, service mode settings content, etc.)
• IC which this battery backs up: image processor PCB (IC36, IC37).
• Effective life of the battery: approximately 5 years.
When the lithium battery (BAT2) dies the message "DATA ERROR" is displayed on
the display panel when the power switch is turned on. When this occurs, please change
the lithium battery. In this situation, the information stored in the control memory has
been erased, and so printing out is not possible.
After the lithium battery has been changed, and the power switch on the main unit is
turned on again, the message "Data have been destroyed" is displayed on the display
panel again. Please press the set key on the control panel. The data stored in the con-
trol memory will be reset to the factory settings. The unit will go into stand-by mode.
9-10
Figure 9-401
COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)