Sanyo SFX-30 Service Manual page 15

3, M-3 PCB(NCU PCB)
This is a Network Control Unit connecting the telephone line and
this facsimile.
The following fimctions are included.
O Hookup detection
@ Ringing signal detection
@ Dial pulse generation
@ Relay drivers
@ Tx/Rx separation circuit
4. M-4 PCB(TELEPHONE PCB)
This PCB
contains
telephone circuit.
The following fh.nctions are included.
0 Speech Network circuit
@ Line monitor function
9 Ringer circuit
5.
M-5 PCB(RX. Mechanism Control)
This PCB contains the driving circuit for Rx. stepping motor and cutter
motor, and sensors for recording paper detection and its jamming.
6. M-6 PCB(TX. Mechanism Control)
This PCB contains the driving circuit for Tx. stepping motor and sensors
for detecting the original document.
7. M-7 PCB(Power Supply)
This is a power Supply using the switching regulation techniques.
It supplies +5V, *12V, and +24V.
8. LCD Display
This contains 16x 1 LCD and segment/common driver.
9. Thermal Head
This contains 1728dots (8dotshnm) of heat generating elements and driver
circuit.
10. Contact Image Sensor(CIS).
This CIS converts scanned image to electrical signal.
11. Monitor Speaker.
This is a speaker used for monitoring the line.
A switch for monitor control volume is mounted on the Telephone PCB
(MA).
12. Ringer Buzzer
This is a buzzer for ringing.
A switch for ringer control volume is mounted on the Telephone PCB
(M4).
13. Handset
This contains
a
microphone and a speaker.
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