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6.7. Analog Unit Block Diagram
C228
C229
Analog Board
Digital Board
R232
R233
R235
R234
R18
R19
PC5
T101
RLY1
LF1
+24VD
6
3
7
5
2
4
+5VD
PC1
Q4
Q7
R15
R12
R13 C9
C8
Q3
POS1
CN1
CN2
SA1
F1
SA2
Q2
RLY1
RELAY
BREAK
D4
BELL
HANDSET
CN201
CN101
IC102
VOL
MODEM
ASIC (IC1)
Analog Front End
(IC5)
SW202
SW201
PAPER
HOOK-IN
H/STX
H/SRX
SPOUT
SPEAKER
SP AMP
SP-MUTE
H/SRX ENB
TEL RX ENB
LINERX
CN102
IC103
CN9
A
ATo
1
LINETX
MTX ENB
H/STX
MUTE
MOM RX ENB
IC6
1011
RELAY
a
b
b
a
D1
C12
C13
C14C116
C117
C126
IC103
R117
R116
1243
T102
L201
C207
C206
R205
C212
C214
C220
R212
R217
R204
L204
L202
L203
R207
R208
R206
R209
C234
C209
Q201
C205
C112
C113
C111
R109
R110
R112
R108
R106
R107
R113
C109
7
6
5
C106
C105
C107
C127
10
11
10
10
R111
IC101
R102
R103
R104
R105
8
10
9
L6
L5
R16
CN202
129
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