Sanyo SFX-11 Service Manual page 17

2. M-2
PCB
This PCB consists of key matrix circuit controlled by "ROW
and
"COL"
signals, and LED circuit.
3. M-3 PCB
This is a Network Control Unit connecting the telephone line and this facsimile,
and the following functions are included.
- Hook up detection
- Ringing detection
- Pulse Dialing Signal generation
- Relay driving
- Isolation circuit for transmission and reception
4. M-4 PCB
This is a telephone circuit PCB and the following functions are included.
- Speech network circuit
- Line monitor function
- Ringing generation
5. M-5
PCB
This is a power supply PCB using switching regulation method, and supplies
+5Vdc, +12Vdc, -12Vdc, +24Vdc. Also this PCB contains motor driving circuit
for transmission and reception motor.
6. LCD display
This LCD display consists of 16 digits x 1line LCD and common driving circuit.
7. Thermal Head
This thermal head consists of 1728 dots of heat generating elements and
driver circuit.
8. Contact Image Sensor
This contact image sensor converts scanned image to electrical signal.
9. Monitor Speaker
This is a speaker used for line monitor. A switch for monitor volume control is
mounted on M-4 PCB.
10.Ringer Buzzer
This is a buzzer to generate ringing. A switch for volume control is mounted
on M-4 PCB.
11.Handset
This handset consists of a microphone and a speaker.
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