Oki B 4100 Maintenance Manual page 409

A3.2.7 M17 Circuit Diagram (Page 7/17, 8/17, 17/17)
1. Block diagram
The circuit diagram shown on page 8/17 consists of connector CN15 that provides an interface
between M17 board and the Modem board (28.8 kbps).
The circuit diagram shown on page 7/17 consists of Modem (14.4kbps).
The circuit diagram shown on page 17/7 consists of Modem (V34 modem or S34).
Modem consists the following functions:
• Modulation/demodulation
Modulation type:
1) ITU-T Rec. V34 (28800 bps) for G3 picture data: OKIFAX 5500/5600
2) ITU-T Rec. V17 (14400/12000/9600/7200 bps) for G3 picture data.
3) ITU-T Rec. V33 (14400/12000 bps) for G3 picture data.
4) ITU-T Rec. V29 (9600/7200 bps) for G3 picture data.
5) ITU-T Rec. V27 ter (4800/2400 bps) for G3 picture data.
6) ITU-T Rec. V21 channel 2 (300bps) for binary signals defined in ITU-T Rec. T.30.
• Automatic adaptive equalizer for G3 receive data with 300 bps data excluded.
• Generation of signal tones
• PB tone (multi-frequency tone) generation
• Detection of single tones
• D/A converter for send data (TX)
• A/D converter for receive data (RX)
• Amplitude equalizer for RX
• Selectable attenuation for TX
• Automatic gain control
Figure A3.2.8 shows the related signals of Modem.
CS1-N
MDRST-N
IOGA3
MDMRD-N
MDMWR-N
1
X'tal
29.4912 MHz
40055101TH Rev.4
IC8
AD0 to AD7
A1 to A7
MDINT1-N
IC12
7
IC12
1
Modem
14.4 kbps
Figure A3.2.8 Related Signals of Modem
CPU
1
TXL
IC29
IC30
1
SW
M17
OKIFAX 5500/5600
CN15
CN200
Modem
28.8 Kbps
(V34)
R
X'tal
NCU
CN6 CN3
S
R
18/18
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