Sharp UX-B700 Service Manual page 69

VOLUME SETTING
Receiver volume setting Low
High
Middle
DTMF Transmission Fixed
volume setting (Receiver)
Key buzzer volume setting Fixed
Speaker volume setting Low
Middle
High
Ringer volume setting Low
Middle
High
DTMF speaker volume Low
setting Middle
High
[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
H: The handset and external telephone is in the on-hook state.
HS
L: The handset and external telephone is in the off-hook state.
(Example: SENDING/RECEIVING)
LINE H
HS
DETECTOR
L
CML
EXIT
CI DETECTOR
Q102
RX
TEL MUTE
(H:MUTE)
TX
HANDASET
MIC MUTE
(H:MUTE)
Q103
: FAX SENDING/RECEIVING
LINEOUT A RCVOL DTME
(HIGH) (LOW) MUTE
1 1
0 0
1 0
1 1
1 1
1 0
0 1
1 1
1 0
0 1
1 1
1 0
0 1
Function
TEL/LIU PWB CONTROL PWB
IC101A
TXOUT
RXIN
IC101B
IC101C
TEL IN
IC101D
IC8
SPEAKER
SP MUTE
(H:MUTE)
+24VL
DG
[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
NO Signal Name (CNLIUA)
1 +24V
2 DG
3 MICMUTE
4 TELIN
5
TELMUTE
6 RXIN
(20438 I/A)
SIGTX
SPKRP
SP OUT
MIC ENABLE
SIGRX
MICP
MIC
/LINE
SELECT
LINEIN
LINE IN ENABLE
SPOUT
LINE
OUT
DTMFMUTE
RCVOL
SP MUTE
TEL MUTE
CI
CML
MIC MUTE
Fig. 8
5 – 14
UX-B700U
FO-B1600U
Function
NO Signal Name (CNLIUA)
7 TELOUT
8 TXOUT
CML
9
10 CI
11
HS-
12
RHS-
RTLOOP
0,6dB
0,1
0,0
DAC DAC
1,0
1,1
ENABLE
LPF
0,20,25,30dB
ADC
LINE OUT ENABLE
0,+4dB
LINE
SELECT
1,1
0,0
SOUT
1,0
MUTE,0,-6,-12dB
IC16 SCE214
FAX CONTROLLER
SIN
HS