2
AUX in (L)
5
BS1 in (L)
7
TV in (L)
4
3
2
1
BS2 in (L)
6
8
9
CCA out (L)
12
NR ref. (L)
11
10
S/H
Peak det.
Det. LPF
Log
F0−adj. L-channel
DAC (NTSC/PAL)
V
REF1
1/2V
CC
(5 V)
Input SW
AN3664NFB
s
Block Diagram
Emph. (L)
13
48
N.C.
14
47
Log
VU out (L)
SW noise
10 kΩ
SW4
Rec. LPF
Audio limit
PB LPF
PC
PB trap LPF
Rec.
Mix.
Logic
Amp.
Amp.
10 kΩ
SW1
CCA
12.9 kΩ
VCO
PB
EVOL
SW2 /AGC
VU out (R)
Rec. FM out (Mix.)
15
(commonly used for BPF monitor)
46
I
2
C clock
16
Line out (L)
45
Line out (R)
44
43
I
2
C
L-ch. BPF
BS2
Hi-Fi
Liner SW
Mix Normal
R-ch. BPF
Mix
FM Lim.
Mute
BS1
SW16
L
L
R
SW17
data
17
Audio FF input
18
RFC
SW22
L+R L
R
Det.
Nor.
rec. in
42
41
RF conv. out
40
RF conv. AGC det.
39
V
(12 V)
CC
38 Normal out
37 Normal in
PB FM input
19
Hold timing
Noise det.
HPF
Audio limit
PB LPF
PC
(commonly used for ENV det. out)
Forced normal
20
L R
SW19
Normal
Hi-Fi SW18 R
BS2 BS1
Mute
Noise det.
VCO
DAC (NTSC/PAL)
F0−adj. R-channel
S/H
SW noise
21
rec.. LPF
SW9
PB trap LPF
Buffer
10 kΩ
CCA
12.9 kΩ
10 kΩ
SW7
SW6
EVOL
/AGC
Det. LPF
Peak det.
150 kΩ
PE
22
Mute CTL
23
Input SW
N.C.
24
25
Emph. (R)
30
29
36
35
TV in (R)
CC1
28
GND1 (R)
33
BS2 in (R)
27
NR ref. (R)
34
AUX in (R)
26
CCA out (R)
32
BS1 in (R) and
Nor. rec. in
31
V
(5 V)
ICs for VCR
PANASONIC [ PANASONIC SEMICONDUCTOR ]
