COPYRIGHT © 2002 CANON INC. CANON FAX BOARD REV.0 MAR. 2002
3 - 1
CHAPTER 3 TROUBLESHOOTING
REF.
If an error code is indicated in the event of a fault, refer to the appropriate
section of Chapter 13 in the Service Manual for the host machine. Like-
wise, to check error codes, refer to the same section (generating a report
on error codes).
1 Points to Note When Troubleshooting
Keep the following in mind when troubleshooting the Board:
1.1 When Turning Off the Main Power
The Board is equipped with a back-up function so that no data will be erased in the
event of a power shortage or when the main power is tuned off (for a specific period of
time).
The back up battery is either a lithium battery or a vanadium lithium secondary battery,
the latter of which can back up the image data for about 1 hr (provided that the main
power has been kept ON for 1 day or more continuously in a normal temperature/humid-
ity environment). If the data cannot be retained for more than half of this period of time,
suspect that the battery has come to the end of its life.
The secondary battery exhaust itself when it has been charged and discharged (100%)
40 times or more (at 25°). The image date will be lost when the indicated period passes.
The lithium battery lasts for about 5 yr. Also, keep in mind that the image data backed
up by the secondary battery will be lost if the jumper plug (JP2) is shifted from ON to
OFF position on the image processor PCB.
Both lithium battery and vanadium lithium secondary battery contain
combustible materials (e.g., lithium, organic solvent), and are likely to
start explosion or combustion when thrown into fire. Moreover, disassem-
bling the batteries can lead to inflammation of the skin upon contact with
the organic solvent. Be sure to take appropriate measures when disposing
of the batteries, as by treating them separately from other waste matter.
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