Sharp FO-90 Service Manual page 39

[Signals for status recognition according to input signals]
Signal Name
H:The handset is in the on-hook state.
RHS
L: The handset is in the off-hook state.
CI Incoming call (CI) detection signal
[Other signals]
Signal Name
TEL IN Receiving signal from line or modem
TEL OUT Transfer signal to line
SPOUT Speaker output signal
Transmission (DTMF) analog signal output
TXOUT
from modem
Reception (DTMF, others) analog signal input
RXIN
into modem
(Example: TEL speaking)
L1
CML
M
L2
C B
CI
DPON
H
~ +
L
~ –
DPMUTE
DPON
L
HANDSET
RX
TX
SPEAKER
BIT7 BIT6 BIT5 BIT4 BIT3
DAC
L/O E SPKR E
MIC GAIN
IACR1
GAIN
TXRX LINEOUT
IACR2
LOOP ATTENUATION
IACR3
Function
Function
TEL/LIU PWB CONTROL PWB
TXOUT
TXMUTE
RXIN
HS
H
TELIN
TELMUTE
TELOUT
VOL_A
VOL_B
VOL_C
4051
SPMUTE
BIT2 BIT1 BIT0
ADC
L/I E MIC E
GAIN
MICBIAS
RXTXLOOP
SEL
LINE SEL
NO Signal Name (CNLIUA)
1 TELOUT
2 TELIN
3 TELMUTE
4 CI
5
HS
6 RHS
NO Signal Name (CNLIUB)
1 N. C.
N. C.
2
FAX MODEM FM209V
SP OUT
ENABLE
RTLOOP
SPKRP-P
SP
DRIVER
MIC
GAIN
MICP
MIC IN
LPF
0,20,25,30dB
LINEIN
LINE IN
LPF
LINE
DRIVER LNINSEL
LINEOUT
MUTE,0,
LINEOUT
–6,–12dB
ENABLE
TX/RX SIGNAL
OGM/ICM/MEMO/PLAYBACK SIGNAL
OGM/MEMO/RECORD SIGNAL
Fig. 7
5 – 11
FO-90RA
NO Signal Name (CNLIUA)
7 RXIN
8 TXOUT
9 CML
10
+5V
11
DG
12 +24V
NO Signal Name (CNLIUB)
3 DPON
4 DPMUTE
(0:1)
MIC ENABLE
(1:0)
SIN
(0:0)
DAC
(1:1)
DAC GAIN
0,6dB
MIC
ENABLE
1
0
SOUT
ADC
LINE IN
ENABLE
ADC GAIN
0,–4dB
1
0
(0:0)
(1:1)
(1:0)
BZOUT
CML
SPMUTE
RCVOL
LEDON
FAX
VTHON
ENGINE
FC200
VREFCONT
MDMRST
VOL_A
VOL_B
VOL_C
RXCONT
W-TONE
RHS
RANK
DRSNS
TXMUTE
TELMUTE
IA-RESET
CUTI
HS
CI
CSWI
PESNS
FRSNS
ORGSNS
PSNS