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January 2001 © TOSHIBA TEC
5 - 19
GD-1060 CIRCUIT DESCRIPTION
5.4.5 Line monitor circuit
NAD/SAD/TWD models
Fig. 5-4-11
Relay PWA
CN10
CN47
CN21
CN15
Lb
La
Line
NCU PWA
SPVOL0
4
3
3
5
3
SPVOL1
SPVOL2
SP
15
3
TONESEL
RING/TONE
80
79
50
53
49
15
6
56
1
2
3
1
2
3
1
4
15
9,11
3
2
IC6
I/O port GA-2
IC34
System control
GA
4
2
5
1
12
15
14
13
11
10
9
SPK
TXOUT
RXIN
RX1
186
14,2
10
11
CML1
73
SP+
SP-
Speak
er
IC5
Analog
switch
IC7
IC4
Analog
switch
AG
SG
T1
IC53
IC52
AG
CN9
CN3
0
1
0
1
0
1
0
1
IC51
Analog
s
witch
RL
Y2
CML rela
y
Main PWA
AG
Q51
+12V
R441
R476
R440
R477
R438
R475
R439,
R474
IC53
TX1
RX1
89
90
89
90
32
28,29
IC4
MODEM
FAX PWA
CN101
CN6
05-04-06-U