Goodmans GMS880, Руководство по обслуживанию

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16
IC BLOCK DIAGRAM
TA2157F/FN
Block Diagram
PIN
V
CTRL
SEL
(APC SW)
TEB
(TE BAL)
RFGC
(AGC Gain)
GVSW
V
CC
APC ON
−
50%
+
12dB
Normal mode
(0dB)
HiZ APC ON 0%
+
6dB
Normal mode
(0dB)
GND
APC OFF
(LDO
=
H)
+
50% 0dB
CD-RW mode
(
+
12dB)
94 k
Ω
30 k
Ω
20 k
Ω
20 k
Ω
15 k
Ω
10 pF
20 k
Ω
12 k
Ω
12 k
Ω
20 k
Ω
40 k
Ω
20 k
Ω
3 k
Ω
3 k
Ω
50 k
Ω
40 k
Ω
20 k
Ω
20 k
Ω
40 k
Ω
20 k
Ω
10 pF
1.
3 V
2 k
Ω
50 k
Ω
2 k
Ω
1 k
Ω
14 k
Ω
240 k
Ω
15 pF
13
14
15
16
17
18
19
20
21
22
23
24
12
11
10
9
8
7
6
5
4
2
1
15 k
Ω
k
×
0.5
×
2
22 k
Ω
22 k
Ω
1
×
0.5
×
2
BOTTOM
PEAK
3
GVSW
VRO
FEO
FEN
RFRP
RFRPIN
RFGO
RFGC
AGCIN
RFO
RFN
GND
RFDC
TEO
V
CC
TEN
TEBC
SEL
LDO
MDI
TNI
TPI
FPI
FNI
240 k
Ω
15 pF
180 k
Ω
40 pF
180 k
Ω
40 pF
60 k
Ω
60 k
Ω
94 k
Ω
PEAK
40
µ
A
1.75 k
Ω
50
µ
A
TA2157F/FN