Sharp A260 - UX B/W Thermal Transfer Service Manual page 40

UX-A260U
[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
SPOUT Speaker output signal
Transmission (DTMF) analog signal output
TXOUT
from modem
Reception (DTMF, others) analog signal input
RXIN
into modem
TELOUT Voice input to MODEM from handset.
(Example: SENDING/RECEIVING)
LINE
H
L
CML
CI DETECTOR
PC2A
Q101
RX
TEL MUTE
(H:MUTE)
TX
HANDSET
MIC MUTE
(H:MUTE)
Q102
: FAX SENDING/RECEIVING
Function
Function
TEL/LIU PWB CONTROL PWB
IC101-A
TXOUT
RXIN
IC101-B
IC101-D
TEL IN
IC101-C
SPEAKER
IC5
IC7
SP MUTE
(H:MUTE)
+24VL
DG
NO Signal Name (CNLIUA)
1 RHS-
2
3 +24VL
4 MICMUTE
5
TELIN
6 TELMUTE
7 RXIN
MODEM BLOCK
(20438 I/A)
SIGTX SPKRP
SIGRX MICP
MIC
/LINE
SELECT
LINEIN
LINE IN ENABLE
Q105
Q104
SPOUT
LINE
OUT
BZOUT1
DTMFMUTE
RCVOL
SP MUTE
TEL MUTE
CI
CML
MIC MUTE
VOL-A
VOL-B
VOL-C
Fig. 6
5 – 12
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NO Signal Name (CNLIUA)
8
DG 9
10
11
12
13
14
RTLOOP
0,1
0,0
1,0
1,1
MIC ENABLE
SP OUT ENABLE
LPF
0,20,25,30dB
LINE OUT ENABLE
LINESEL
1,1
0,0
1,0
MUTE,0,-6,-12dB
IC3 SCE214V
FAX CONTROLLER
TXOUT
CML
PIN
FILM
CI-
HS-
TELOUT
0,6dB
SIN
DAC DAC
ADC
0,+4dB
SOUT