Sanyo SFX-32 Service Manual page 16

5)
128KBit SRAM
-This is used for a temporary memory for image signal and various
data memory such as Activity report one touch/speed dial list,
Ram Code Data, etc.
6) Backup control
It is used to keep the stored data of SRAM and Clock.
7) NCU I/F Circuit
This is a interface circuit for connecting NCU and MODEM
2. M-2 PCB(Operation Panel)
This PCB contains key matrix circuit controlled by ROW and COL
signals and LED circuit.
3. M-3 PCB(NCU PCB)
This is
a
Network Control Unit connecting the telephone line and
this facsimile.
The following fictions are included.
0 Hookup detection
@ Ringing signal detection
@ Dial pulse generation
0 Relay drivers
@ Tx/Rx separation circuit
4. M-4 PCB(TELEPHONE PCB)
This PCB contains telephone circuit.
The following functions are included.
0 Speech Network circuit
@ Line monitor fiction
@ 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 recordtig 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 (8dots/mm) of heat generating elements and driver
circuit.
—
.—
10. Contact Image Sensor(CIS).
This CIS converts scanned image to electrical signal.
—14—