Panasonic KX-F1200 Service Manual And Technical Manual page 83

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1. L_ENERAL BLOGK DIAGRAM
The control section will be explained as shown in the block diagram.
1) CPU (IC401) ....................................................... The CPU fetchs and executes instructlol]_ _,_l,_ h_lvi, wl _ if e,_us) data to
(from) RAM, writes commands to the ASIC and reads status information from
ASIC.
2) ROM (IC402) ....................................................... Contains all of the program instructions for unit operations.
3) Static RAM (IC403) ............................................. This memory is used mainly for parameter working storage area.
4) Dynamic RAM (IC415, IC416) ............................ This memory is used mainly for parameter working storage area.
5) RTC (IC408) ........................................................ Real time clock.
6) ASIC (IC404) ....................................................... Composed mainly address decoder and modem control section.
Control the general FAX operation.
Control the operation panel I/F.
Control the thermal head I/F and CCD I/F.
Excution image processing.
7) Gate Array (IC417) ............................................. Excution image processing.
8) MODEM (IC405) ................................................. Executes modulation and demodulation for FAX communications.
9) Read Section ...................................................... Composed of the LED array light source, CCD image sensor to read transmitting
documents.
10) Thermal Head ................................................... Contains heating elements for dot matrix image printing.
11) Motor Driver (IC406,407) .................................. Drives the transmission motor and the reception motor.
12) Reset Circuit (IC409) ........................................ Provides reset pulse to each of the major IC's.
13) Analog Board .................................................... Composed of ITS and TAM circuit, NCU circuit.
14) Sensor Section ................................................. Composed of cover open sensor, document sensor, recording paper sensor,
read position sensor, paper set sensor, paper out sensor, paper top sensor, rib-
bon end sensor.
15) Switching Power Supply Section ...................... Supplies +5 V, +12 V,-12 V and +24 V to the unit.
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