Zenith ABV341 Series, Service Manual

Page: 31 / 190

3-24 3-25
3. Y/C BLOCK DIAGRAM
EP PB 'A'
EP PB 'B'
SP PB 'B'
SP PB 'A'
64
59 58 57 55 54 53
65
67
72
74
ACC
DET
ENV
DET C-ROT
RF-SW
IN
Y/C ENA Y/C DA
T
A
Y/C CLOCK
V.OUT
AUDIO
MUTE
HA SW
P
P
P
C-LPF
MAIN
CONV
3.58M
BPF2
ACC
AMP
ACC
DET
CLAMP
Y
LPF
CLAMP
CLAMP
IN
OUT
VCA
CCD
3.58M
BPF1
Y/C
MIX
6dB
DOUBLE
LIM
FM
DEM
SUB
LPF
MAIN
DE-EM
PB
FM-EQ
FM
AGC
CNC
YNR
COMB
4.21M
BPF
SUB
CONV
39
37
36
34
26
22
21
P
B
(PB Mode)
EP REC
SP REC
57
V
. H/SW
55
Y/C ENA
54
Y/C DA
T
A
53 51 50 49 48 47
39
38
37
36
34
32
30
28
22
21
20
73
70
69
66
Y/C CLOCK
X-T
AL
3.58MHZ
C-LPF
MAIN
CONV
4.21M
BPF
SUB
CONV
DETAIL
ENH
MAIN
EMPHA
REC
FM-EQ
4.7K
FM
MOD
Y
LPF
YNR
COMB
3.58M
BPF1
LINE2
26
V.OUT
DVD
TU/LINE1
VIDEO
AGC
CLAMP
CLAMP
CLAMP
IN
CCD
OUT
VCA
SW
BLOCK
IC302
NL
EMPHA
B-UP
AMP
ACC
AMP
ACC
DET
BGA
REC
APC REC
APC
320FH
VCO
SLD VX01
SERIAL
DECODER
R
R
B
ZENITH
(REC Mode)