Gestetner A193 Service Manual page 581

2. VIF (Video InterFace)
Video and command interface to the BiCU
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Smoothing
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Sub scan reduction and page reduction
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3. Modem (Rockwell R144EFXL)
V.21, V.27ter, V.29, and V.17
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4. Energy Saver CPU
Power distribution control in energy saver mode
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5. ROM
2MB (16 Mbit) flash ROM for system software storage
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6. DRAM
2.5 MB DRAM shared between the buffer memory (384 kB), ECM
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Buffer (128 kB), Page Memory (1 MB), and SAF memory (1 MB)
1 MB SAF memory, backed up by the rechargeable battery
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7. SRAM
128 kB SRAM for system and user parameter storage, backed up by
•
the lithium battery
8. Oscillators
42.20545 MHz oscillator for system clock generation
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32.768 MHz oscillator for the real time clock. This is backed up by the
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lithium battery
38.00053 MHz oscillator for the R144EFXL modem
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9. IC Card Slots
Upper slot for an optional Feature Expander or a hard disk interface
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(SAF memory)
Lower left slot for an optional Function Upgrade Card
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Lower right slot for an optional page memory (4 MB). The total page
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memory capacity will be 4 MB with this option.
10. Jumpers, Switches, and Test Points
Item
SW1 Switches the backup battery ON/OFF
SW2 Reset switch
Refer to page 4-8 for the re-set switch procedure.
(A639)
Description
2-27
PCBs
SM