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8.4.
SYSTEM CONTROL & SERVO SECTION IN MAIN SCHEMATIC DIAGRAM
P :TO POWER TRANSFORMER SECTION
R :TO POWER SUPPLY/RF SECTION
V :TO LUMINANCE & CHROMINANCE/AUDIO SECTION
A
:TO Hi-Fi AUDIO SECTION
T :TO TIMER SECTION
G
A
IR
A
PROG
H
A
OSD PULSE
R
SW2
T
SAFETY TAB
L
R
V
A
MAIN IIC CLOCK
R V A
MAIN IIC DATA
V
EE
L
V
CYL HEAD (-)
V
CYL HEAD (+)
V
FREQ. ADJ.
F
V
PAL EP
H
H
V
LP
A
AV2 PB
H
A
RFC MUTE
H
V
TRACKING ENV.
E
R
AFC S-CURVE
R
N.SW 5V
R
REG 5V
R
PS 5V
R
PS 12V
D
R
GND
R
GND (SYS)
R
GND (FG)
R
GND (MOTOR)
R
GND (CYL)
R
GND (AV)
L
A
S-VHS SW
1
MODE
C
SW
2
S1501
3
K0G934A-
4
00002
A
ABS NORMAL
H
V
NORMAL
L
V
S-VHS
H
A
D.FM REC
H
V
ART V/H/N
V
ET REC
H
B
A
A.HEAD SW
R
AUDIO DEF
H
V
TBC MODE O
V
HEAD SW
L
V
V.EE
V
D.A.REC
H
V
BIAS
L
V
A
MUTE
H
V
FULL ERASE
H
T
POWER KEY
R
POWER OFF
H
R
FIP
L
T
RESET
L
V
SHORT DET
L
V
A
OSD VIDEO OUT
A
AV3 S-VHS IN
L
A
A
AV1 PB 12V
T
BACK UP 5V
1
CAPSTAN SERVO SPEED LOOP
QR6002
XN1212
(A.DUB
H
5
A21
4
3
A18
A17
A14
A12
R6032
C6019
A11
1K
0.1
A10
A9
A8
A7
R1506
A6
10K
A4
A3
A2
A1
R6023 27K
R6025 43K
TL6010
R6019 10K
R6021 27K
R6020 39K
R1501 120
C2514
Q1501
0.1
PNB2301MBV
(T-PHOTO)
R6018 4700
R6001 4700
B1
B2
Q6008
B3
2SD601A
(AV1 PB:ON)
B4
(AV1 PB
R6073
B5
470K
B6
B8
D6004
B9
1SS355
B11
B12
R6074
B13
R6075
470
B14
22K
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
2
3
CAPSTAN SERVO PHASE LOOP
C6020
:ON)
1
1
C6026
R6033
0.1
8200
L6003
C6018
220u
0.022
2
S-VHS
CASSETTE
S1502
VST0325
R6045
100K
A6
C6015
A4
16V10
A3
A2
R6022
100
R6026
C6016
A1
39K
0.01
B4
C1501
0.1
B5
Q1502
B6
PNB2301MAV
(S-PHOTO)
B8
SENSOR
D1501
B9
SIR505S
B11
R6072
B12
22K
B13
B14
QR6001
UN2215
L
:OFF)
R6071
18K
R6076
15K
4
A23
R2507
R2508
270K
43K
C2508
0.1
TW2002
C2513
3900P
IC6001
M37970VXMU
116
115
114
CURRENT
1
LIMIT
2
F ADJ.
3
S CAS
L
4
A.DUB
H
5
TRACKING ENV.
6
SLP
H
7
LP
H
8
CPB
9
AFC S
10
A MUTE
H
11
AV1 PB +12V
12
N/S/T1/T2
13
S-PHOTO
14
T-PHOTO
15
ABS NORM
H
16
SPB
H
/MES
M
/NOR
L
17
S-VHS
H
18
SECAM ID IN
19
D.FM REC
H
20
ART V/H/N
L
21
S SW
22
AV3 S IN
L
23
ET REC
H
24
VIDEO H.SW
25
AUDIO H.SW
26
A.DEF
H
27
TBC MODE
28
AVPB-H
L
29
AVPB-M
M
30
31
32
C6013
1
X6002
R6005
H0H200-
0
500011
R6017
C6012
C6011
1K
15P
18P
TW2001
B15
B16
5
CYLINDER SERVO SPEE
A7
A8
A25
C2509
0.47
C6017
R2505
680P
3900
R6031
6800
C2512
25V4.7
C2511
6V22
N
113
112
111
110
109
108
107
106
33
34
35
36
37
38
39
40
R6004
X6001
220K
VSX1022
C6010
C6009
18P
18P
B17 B18
6
40
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