Icom IC-R3 Service Manual page 13

FM-TV DETECTOR CIRCUITS (FM-TV UNIT)
"IFIN" signal from the 1st mixer
circuit (RF unit; IC1, pin 6)
IF
BPF
amp.
IC1
FI1
FMTV5
R4
C3
25 24 22
AGC
amp.
IC2 (FM-TV DETECTOR IC)
R13 R12
D4
D2
L1 L2
CP1
R3 C4
R78
21 20
IF DC
amp. amp.
PD
VIDEO
amp.
VCO
10 11
6 8 9
C16
R15 R16
L3
R14
4 - 7
R77
19
Loop
amp.
12 13 14
R16
R15
C16
The detected signal
C18
R8
R6