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A
B
8
7
6
5
FROM/TO JACK
4
GND
FROM/TO SYSCON/SERVO
H.SW
ENV.DET
GND
3
FROM POWER
P.CON+5V
GND
2
TO Y/C/AUDIO
PB-Y/C
GND
1
A
B
G-9
C
D
HEAD AMP SCHEMATIC DIAGRAM
(SYSCON PCB)
NOTE:
THE DC VOLTAGE AT EACH PART WAS
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
MEASURED WITH THE DIGITAL TESTER
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
DURING PLAYBACK
C
D
E
F
NC
C4110
50V
1
KA
NC
NC
NC
NC
NC
5.1
0
0
0
0
0
2.1
0
2.1
2.1
1.4
1.9
24
23
22
21
20
19
18
17
16
15
14
13
PLL 5V
PB OFF
PB
REC
REC ON
PB ON
AGC-DET
REC OFF
10K
VCC
VCC
BIAS
CURRENT
AMP
AMP
REC/MUTE/PB
H
L
REC
SW30
3.0
EP/SP
SW 30
H.SYNC
REC
MUTE
AGC
1.0
EP
H CH
HIGH
ENVELOPE
PB
1.5
1.0
1.5
SP
L CH
LOW
DET
ATT
1
2
3
4
5
6
7
8
9
10
11
12
0
0
0
3.3
3.0
2.9
1.7
0
2.2
0.3
2.6
NC
0
NC
NC
NC
NC
NC
NC
W827
AUDIO SIGNAL(PB)
PLAYBACK COLOR SIGNAL
PLAYBACK LUMINANCE SIGNAL
E
F
G
H
8
7
6
5
4
3
2
PCB010
VM9172
1
G
H
G-10
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