Y/C/AUDIO/HEAD AMP/21PIN/IN/OUT BLOCK DIAGRAM
X4001
4.433619MHz
83
6
37
40
76
69
42
Y/C/AUDIO/
HEAD AMP IC
IC4001 HA118225F
36
77
71
38
29
55
98
74
73
79
80
43
45
57
R
P
46
49
51
2MLPF
HPF
ACC
FH TRAP
CTL TRAP
R
P
R
P
VCA
CCD
LPF
C.K
6dB AMP
V-AMP
N-->P
CLEAR
SYNC
C-SUQUELCK
SQUELCH
B.D
BPF
FBC
VIDEO ALC
DELAY
CLPH
R
P
MAIN
CONV1
MAIN
CONV2
CLPH
+
R
P
R
P
R
P
R
P
+
B.E
C.K
TRAP
LPF
+
REC
MUTE
REC
EQ
VCA
LINE
AMP
R
P
HPF
1M HPF
7M HPF
FM MOD
LAG LEAD
LPF
629
TRAP
FM AGC
P.EQ
S DL
SQPB
SQPB
G EQ
Y CCD
C CCD
LPF
15
ATT
VIDEO
AGC
R
P
D LIM
DEMO
SLPF
MAIN
DE-EMPH
D.E
N.C
Y APA
YNR
GCL
R
P
MIX
LEVELADJ
R
P
R
P
YLPF
FBC
ALC
NL EMPH
NL DE EMPH
MAIN EMPH
CARRIER
OFFSET
W.C/DC
F0/DEV ADJ
S-DET
Q4106
BUFFER
87
86
85
H.AMP
2
REC
MUTE
LINE
MUTE
ENV
DET
J4201
2
1
6
3
8
7
11
16
15
20
19
Q4205
MUTE SW
L4101
15.6KHz
TRAP
Q4107
AMP
Q4202
BUFFER
D4210
L4003
1
3
6
Q4006, Q4007
FE HEAD
4
ENV_DET
H. SW
MICON
SDA
SCL
VCR_A_MUTE
V. REC_ST_H
CTL+
CTL-
CYL.
CP4001
3
2
4
SP_COM
SP-CH2 (L)
SP-CH1 (R)
CP4005
2
AUDIO PB
5
6
1
AE HEAD (+)
AUDIO REC
AE HEAD (-)
HEAD AUDIO
CONTROL
4
3
CTL+
CTL-
PB SW
5
Q4002
OSC
Q4001
NORMAL A.
REC ST SW
CP4004
1
2
FE HEAD (HOT)
FE HEAD (GND)
TU_AUDIO_MUTE_H
MICON
EXT_IN_L
21_R
21_G
TV
21_B
21_Y
TV
TUNER_A
TUNER_V
Y/C_V
Y/C_A
Q4005
V.REC
ST SW
96
PRE
AMP
53
65
CLOCK
DRIVER
31
SYNC.
SEP
C. SYNC
MICON
8
9
28
D_V_SYNC
4
PDC/VPD DECODER IC
IC4102 SDA5650/X
5
17
4
3
JACK_V
19
ATT
17
ATT
FRONT_A_IN_L
FRONT_V_IN
Q4207
PERI SW
Q4210
TUNER SW
TUNER_ON/OFF
E-3
E-4