Sony SLV-M20HF - Video Cassette Recorder, Service Manual

Page: 34 / 143

SLV-M20HF
3-4. AUDIO BLOCK DIAGRAM
3-7 3-8
BOARD
AJ-2
3
CJ801
CN801
L2 R
CN423
LINE 2
IN
CJ570
LINE
OUT
AUDIO
R
L
MA-335 BOARD
2
1
3
3
CN260
DRUM
AUDIO
HEAD
CH1
CH2
17
4 REC MUTE
IC340
AFM
REC/PB
AMP
L341
18
24
20
AGC
DET
13
14
16
VCC
SW5V
3
9
1
H SW
5 REC
CA
HA
HA
REC ON
EP
SP
AGC
AMP
PB ON
VCC
VCC
1
CN341
FM PB
HF ADJ
FOR
CHECK
36
37
AGC
AMP
VCO
HF
LPF
PNR
L
MUTE
OUTPUT
SEL
INPUT SEL
LEVEL
DET
VCO
HF
LPF
PNR
L
15
14
MUTE
16
17
MUTE
12
13
NORMAL IN
NORMAL OUT
21
20
35
SW12V SW12V
SW12V
FM PB
FM REC
IC360
AUDIO
PROCESSOR
(HIFI)
39 5 6 3 4
SCL
42
SDA
41
AF SWP 40
AGC
R
L
AUDIO
CJ570
LINE 1
IN
R
L
AUDIO
5
L2 L
3
5
BIAS
ERASE
OSC
T331,Q331
CN301
1
2
4
ERASE
ERASE
HEAD
AUDIO
REC/PB
HEAD
NOMAL
AUDIO
HEAD
SW
4 2
IC301
1
FULL
HEAD
CN302
HEAD
SW5V
SEL
1
2
IC201
AUDIO
PROCESSOR
(MONO)
MUTE
CTL
MUTE
LINE
AMP
77
PB
PB
ALC
10 11
8
9
PB:
LP,SP
EQ
76
AVCC REC
SW5V
REC
REC
79 1 5
REC:EP,LP
PB:EP
4
3
AUTO
BIAS
BIAS
SW
Q301
6
70
7
80
AUTO
A-H SW
75
73
71
MUTE
MUTE
SW
MUTE
Q387 Q386
Q379
RF AUDIO TU700 1
FROM/TO
TUNER
BLOCK
TU AUDIO L IC733 3
TU AUDIO R IC733 4
(2/2)
FROM/TO
SYSCON
BLOCK
16
A MUTE IC161 31
I2C DATA1 IC161 28
I2C CLOCK1 IC161 30
AF ENV IC161 59
AF SWP IC161 100
AF REC P IC161
2
AF REC IC161 96
(SEE PAGE 4-5, 21)
(SEE PAGE 4-32)
(SEE PAGE 3-11, 12)
(SEE PAGE 3-6)