Oki OF5300, Руководство по обслуживанию

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Service Manual for OF5300/5600
Chapter A Board Descriptions
By mounting this optional memory board (MEM/MEM-2), it can be used for the expansion memory.
1. Block diagram
Figure A3.11.1 shows a related signal of memory board.
Memory board circuit consists of the following block.
1) 512 kbyte MOS Dynamic RAM x 4 (IC3 to IC6).
Used as follows:
Picture memory for the ECM send/receive modes.
Picture memory for the memory transmission mode.
Picture memory for the retransmission data.
Picture memory for the reception in memory
2) Memory capacity
1 Mbyte memory board can be added for OKIFAX 5300.
The relationship between memory capacity and mounted boards are shown in the following table.
Equipment Memory
Capacity
IC3 IC4 IC5 IC6
OKIFAX 5300 1 Mbyte Mounted Mounted Not mounted Not mounted
OKIFAX 5600 1 Mbyte Mounted Mounted Not mounted Not mounted
OKIFAX 5600 2 Mbyte Mounted Mounted Mounted Mounted
Note:
Minimum one hour of back-up time during electrical interruption.
Battery back-up of image memory is provided by the optional memory card itself. This card
contains a battery.
3) Image memory capacity
Memory Condition OKIFAX 5300
(pages) OKIFAX 5600
LEGAL Setting
With Option Board Standard (without
option) 17 35
1.0 Mbyte 100 120