Data In The Control Processing Memory (Sram) - Canon MultiPASS C50 Service Manual

5.4.2 Data in the control processing memory (SRAM)

SRAM is backed up by a lithium battery. It can retain the stored data for 5 years after the
power is turned off. SRAM stores the following data: All the data the user entered with the
menu system, the activity reports and other report-generating data, the redial data containing
the redial destinations set with the Redial key, the servicing data set by repair personnel
with the service soft switch, and the CS LED lights-on duration data. SRAM stores almost
all of the data which can be entered or set.
These stored data can be checked with various reports.
Jumper plug precautions
The control/image processing memory is backed up by shorting the jumper
pin (JP13) on the SCNT board with the jumper plug. If the the jumper plug
is removed and the power is turned off, the data in SRAM will be lost.
NOTE
Before removing the jumper plug, be sure to print out the data stored in the
SRAM.
Lithium battery life
The lithium battery can last for over 5 years after the power is turned off.
When the power is on, the lithium battery's power is untapped. Therefore,
the actual battery life can be much longer.
When the lithium battery becomes exhausted,
displayed after the power is turned off or on. When this happens, replace
the lithium battery. Since the data in SRAM will be lost when the battery is
replaced, it cannot be printed out.
After the lithium battery is replaced and the power is turned on,
ERROR"
contents in SRAM and initialize it to the factory defaults.
Refer to
reset the CS LED lights-on duration.
will be displayed. Press the
Chapter 3: 3.1 CS LED lights-on duration adjustment on Page 3-6
1-49
Chapter 1: General Description
"DATA ERROR"
key to discard the
START/COPY
will be
"DATA
to