Oki B 4100 Maintenance Manual page 492

A3.12 CTR (PC interface unit) Circuit Diagram (option)
CTR board is used as an interface board of PC and FAX when PC is connected to facsimile machine.
1. Block diagram
CTR board circuit is formed by Receiver, Driver, and 1284-I/F.
Figure A3.12.1 shows related signals of CTR board.
CPU
IC2
IOGA
Figure A3.12.1 Related Signals of P050 (PC interface unit)
40055101TH Rev.4
R44/17
BACKI
AD0 to AD7
RD-N, WRL-N
CASL-N,
CLK
BRE0O
BRE0I
PSBN
VEROP
FLT-N
SELP
ACK-N
BSYP
IPRN
AFXN
SLIN
BACKO
PD0 to PD7
AD8 to AD15
CTR (option)
CN2
Driver
Receiver
1284-I/F
CN3
CN1
Host PC
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