Samsung SCX-4720F - Fax Section

Service Manual
Summary of Product
4-22
Samsung Electronics
4.8 Fax Section
4.8.1 Modem
• Group3 Facsimile Modem (Entire FM336/314 Family)
• External Handset Support (not implemented on SCX4720F)
• Requires Discrete Line Interface Unit (LIU )
• V.34 Half-Duplex Mode
• V.90 PCM/V.34 Duplex Data Modes
V24
Interface
FM336
Modem
Crystal
OR
Oscillator
Line
Interface
telephone
line
TIP
RING
Optional
Eye Pattern
Generator
Speaker
Amplifier
Power Supply
Host
Processor
/RTS XTLI
XTLO
CLKIN
RIN
TXA1
TXA2
DH
RINGD
/TALK
EYEXY
EYESYNC
EY RCLK
SPKR
+SV
+3.3V
AGND
DGND
/CTS
TXD
TDCUK
XTCLK
/RLSD
RXD
/RDCLK
/DTR
/DSR**
/RI*
/RD
/WR
/CS
/D[x:0]
RS[4:0]
IRQ
/RESET
TXRQ*
RXRQ**