Sanyo SFX-33 Service Manual page 19

3.
4.
5.
6.
7.
8.
M-3 PCB (NCU PCB)
– This PCB contains NCU (Network Control Unit) circuit which controls signals between telephone
network and facsimile.
@ Hookup detection
@ Ring signal detection
@ Dial pulse generation
@ Driver for CML and DP relays
@ Separation circuit for Transmission and Reception
M-4 PCB (Telephone PCB)
– This PCB contains telephone circuit.
The following functions are included,
~ Speech network circuit
@ Line monitor circuit
@ Ringer circuit
M-5 PCB (Reception mechanism control)
– This PCB contains driving circuit for Rx. stepping motor and cutter motor, and detection and jam
sensors for recording paper.
M-6 PCB (Transmission mechanism control)
– This PCB contains driving circuit for Tx. stepping motor and sensor circuit for original document.
M-7 PCB (Power supply)
– This is a switching
LCD display
– This contains 16x
9. Thermal head
power supply and outputs +5V, +/-12V and +24V.
1 line LCD with segment and common driver circuit.
– This contains 1728 dots (8-dot/mm) of heat generating elements and their driver circuit.
10. Contact Image Sensor (CIS)
– CIS converts scanned image to electrical signal.
11. Monitor speaker
– This is used for monitoring the line.
Monitor volume switch controls loudness of the monitoring sounds. It is mounted on the Telephone
PCB (M-4).
12. Ringer Buzzer
– This is used for generating
- Telephone PCB (M-4).
13. Handset
ringing sound and the loudness controls by the ringer switch mounted on
– This contains a microphone and speaker.
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