XEROX DFC165 & DWC 165c Service Manual
2-13
The memory block, divided into the following three sections, is an integral part of
the motherboard:
•
EPROM
(256 Kbytes), this memory contains the system
firmware
, the default
settings of the software parameters and the
messages
in the various languages
•
STATIC RAM
(8 kbytes), this memory contains:
-
the
current user and service software parameters
-
the
calibration settings
(alignment settings, CCD settings)
-
the
telephone number list
(one-touch dialling numbers, speed code
dialling numbers, broadcasting lists)
-
the
power failure repor
.
•
DYNAMIC RAM
(512 kbytes), this memory contains:
-
the
compression and decompression buffer
-
the
scanning buffer
-
the
print buffer
-
the
transaction memory
(activity reports)
-
the
user memory
(documents to send, documents received in the memory).
The data is retained in the dynamic memory even during a power failure by a
backup
battery
capable of powering the system for 72 hours. The facsimile machine
must
be left powered for
24 hours
to
recharge
this battery.
The data is retained in the static memory by the
5-year duration system battery
.
Static
RAM
EPROM
Dynamic
RAM
