Backed Up By Rechargeable Battery; Data Backed Up By Rechargeable Battery - Canon LASER CLASS 3175 Service Manual

LASER CLASS 3170/3175/3175MS Chapter 1: Safety and Precautions

3.2 Backed up by Rechargeable Battery

The data stored in the image memory on the SCNT board is backed up for about 12
hours by the secondary vanadium-lithium battery.

3.2.1 Data backed up by rechargeable battery

Image data stored in the DRAM:
Image
Transmission images
Reception images
Memory clear list
If the power is turned on after the rechargeable battery backup
time has been exceeded, the memory clear list is automatically
NOTE
printed out. The memory clear list is a list of image data that have
been cleared from memory. If the memory clear list cannot be
printed due to printer engine trouble or run out of paper, the fax
sounds alarm, information for managing the storage status of
image data is erased from memory, then goes on standby. The
operation that is carried out when the memory clear list cannot be
printed can be altered by changing the setting of SSSW SW02 bit 0.
For details, see G3 Facsimile SERVICE DATA HANDBOOK (Rev. 0)
(supplied separately) .
After the memory clear list is printed out, information for
managing the storage status of image data is automatically erased
from memory.
Conditions for image backup
1) Reception images
2) Transmission images
Mode
Memory transmission
Sequential broadcasting
Delayed (broadcast) transmission
Confidential transmission
Polling transmission
Relay control transmission
Relay broadcast transmission
Memory reception
Confidential reception
If power is interrupted during reception, only pages that have
completely been received are backed up, and the page that was in
the process of being received during the power interruption is
deleted.
Only memory transmission images (including during standby for
redial) are backed up, and direct transmission is canceled.
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