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8.5.
LUMINANCE & CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRA
R
:TO POWER SUPPLY/RF SECTION
S
:TO SYSTEM CONTROL & SERVO SECTION
A
:TO Hi-Fi AUDIO SECTION
H
I
:TO INPUT/OUTPUT SECTION
T
:TO TIMER SECTION
P4003
G
(TO A/C HEAD)
AUDIO ERASE IN
1
GND
2
A.HEAD (R)
3
A.HEAD (W)
4
CTL HEAD (-)
5
CTL HEAD (+)
6
F
S
CTL HEAD (+)
S
CTL HEAD (-)
S
SHORT DET
L
S
BIAS
L
E
P4002
(TO FULL ERASE HEAD)
FULL ERASE OUT
1
FULL ERASE IN
2
S
HEAD SW
D
S
H.AMP SW
S
ENV. SELECT
S
TRACKING ENV.
S
D.REC
H
S
CURR. EMPH
H
R
TUNER AUDIO (N)
A
FM MUTE
A
AUDIO OUT (N)
S
MUTE
H
A
AUDIO IN (N)
C
P3502
(TO CYLINDER UNIT)
LP R
1
LP COM
2
LP L
3
SP R
4
SP COM
5
SP L
6
GND
7
AUDIO HEAD L
8
AUDIO HEAD COM
9
AUDIO HEAD R
10
B
A
AUDIO HEAD R
A
AUDIO HEAD COM
A
AUDIO HEAD L
S
D.A.REC
H
S
PAL EP
H
A
R
BIAS 5V
R
VIDEO 5V
R
GND
NOTE:THE MEASUREMENT MODE OF THE DC VLOLTAGE IN THE BRACKETS( )ON THIS DIAGRAM IS RECORD MODE
WITH PAL COLOUR SIGNAL.(SP MODE)
1
VIDEO MAIN SIGNAL PATH IN REC MODE
R4030
8200
C4031
0.022
C4029
1500P
R4028
C4026
2700
10V22
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A15
A16
A17
A18
A19
A20
0
(4.9)
2
3
T4002
EQQ7QF024P
C4032
220P
3
4
2
R4029
0.3
3300
(-0.6)
1
6
L4003
68u
C4030
6V220
0.4
(4.9)
5.0
Q4005
(4.1)
2SB710
(AUDIO ERASE DRIVE)
R4027
3300
5.0
R4026
4700
0(3.6)
R4009
0.7
Q4001
2200
(-23.1)
2SD601A
5.0(-23.0)
(PB:ON)
QR4003
UN2111
0
(D.A.REC
(-14.9)
H
:OFF)
R4010
0.7
5.0
Q4002
2200
(-23.1)
2SD601A
(PB:ON)
THE MEASUREMENT MODE OF THE DC VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRA
WITH PAL COLOUR SIGNAL.(SP MODE)
4
VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE
TW2001
A1
A2
0.4
(4.7)
A19
Q4006
2SD602A
(OSC)
A20
C4028
0.022
A18
A17
A15
A16
R4001
1K
5
IC3
AN3
2.4
H
1
0
H
C3002
C3003
2
1000P
1000P
0
(2.7)
3
C3506
LB3501
0.7
0.1
VLP0147
(2.9)
4
5
G
C3507
LB3502
0.7
0.1
VLP0147
(2.9)
6
C3508
LB3503
0.7
0.1
VLP0147
(2.4)
7
8
G
C3509
LB3504
0.7
0.1
VLP0147
(2.4)
9
0
(2.5)
10
0
11
0
12
N
0
13
N
0
14
N
0
15
N
0
16
N
0
17
N
0
18
N
6
36
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