JVC KD-S785 Service Manual page 22

KD-S785
TA2147F-X (IC521) : RF amp.
1.Terminal layout
2.Block diagram
GVSW 13
VRO 14
FEO 15
FEN 16
17
RFRP
RFRPIN 18
RFGO
19
RFGC 20
AGCIN 21
22
RFO
23
RFN
GND 24
1-22
20k 20k
15k
50 A
20k
12k
12k
20k
BOTTOM
PEAK
20k
180k
40pF
3k
3k
PEAK
15k
50k
20 A
40k
20k
20k
20k
2k
50k
1k
2k
14k
1.75k
240k
15pF
x0.5
k
x2
240k
15pF
x0.5
1
x2
80k
60k
20k
60k
80k
20k
12 RFDC
11 TEO
10 TEN
9 TEBC
8
SEL
7 LDO
MDI
6
5 TNI
4 TPI
3
FPI
2
FNI
1 Vcc