Servo Block Diagram - Panasonic PV-4601 A Service Manual

SERVO BLOCK DIAGRAM

IC2601
+14V
DD CYLINDER
PIN P3502
VCC
16
MOTOR
8
8
J
PIN P3502
2
3 3
K
CYLINDER
PIN P3502
1 MOTOR
2
2
L DRIVE
PIN P3502
17
1 1
C2610
M 8
PIN P3502
PG/FG PULSE
4 4
GENERATOR
HALL
N 9
IC PIN P3502
6 6
IC2502
DD CAPSTAN
O
MOTOR PIN P2502
2
12 12
P CAPSTAN
PIN P2502
MOTOR
5
13 13
DRIVE
Q
PIN P2502
8
11
11
CAPSTAN
7
FG HEAD
IC2501
3
R
PIN P2502
19
3
3
HALL
C2509
S
DIFFERENTIAL
PIN P2502
IC
20
AMP
5 5
T
PIN P2502
21
6 6
HALL
C2510
U
PIN P2502
IC
22
8
8
V
PIN P2502
23
9 9
HALL
C2511
W
PIN P2502
IC
24
1
1
PIN P2502
15
15
P1541 P2503
CONTROL
6 6
HEAD
P1541 P2503
5
5
C2611
P3501 P3001
7
3
3
P3501 P3001
15
2 2
4 1 6 3
+14V
4 5 2
VCC
P2501 P6201
15
7
7
P2501 P6201
17
9
9
P2501 P6201
11
11 11
P2501 P6201
POSITION
5
5
SIGNAL
P2501 P6201
PROCESS
17 17
P2501 P6201
18
18
+5V
R6205
C6221R6229
1/2VCC
C6217
C6218
1/2VCC
C6223
R6202
I
R6204
C6212
D6202
D6203
D6201
C6209
R6213
1/2VCC
R6216
R6219,C6205
INTEGRATION
INTEGRATION
R6207,R6215,R6218
R6206,R6214,R6222
C6202,C6206
C6201,C6204
INTEGRATION
R6208
INTEGRATION
R6209,C6203
PG SHIFTER
(HEAD SWITCH POSITION)
+5V
TP6205
R6201
(TO HEAD AMP CIRCUIT)
C6207
HEAD SW PULSE
R6091
D6006
NOT USED
R6211
R6210
R6203
R6212
IC6001
70
REC CTL
C
AMP
71
PB-ON
- +
+ NEGATIVE PB
-
73 CTL SLICER
1/2VCC(2.5V)
POSITIVE PB
67
CTL SLICER
+5V
+-
68
75
TP6207
SELECT
42 CAP REV(H)/STOP(M)/FWD(L)
COUNT
SCHMIT
62
DOWN
63
PG
H
AMP SELECT
64
58
59
R6223
- +
CAP
60
ON
61
CAPSTAN SPEED
PWM
24
COMPARATOR
G
REC CTL
PWM
23
/TR MM
CYLINDER/CAPSTAN
GENERATOR
PHASE COMPARATOR
PWM
25
E
CYLINDER SPEED
PWM
26
COMPARATOR
FG
F
FG/PG
66
H.SW SIGNAL
SEPARATOR
GENERATOR
PG
57
21
POWER ON(L)
48
FORCED ACCELERATION
41
SLOW
H-ROLL ACCELERATION
/STILL
40
CONTROL
CAP TORQUE LIMIT
43
–1
BY PLACING A JUMPER BETWEEN
TP6003 AND +5V(TP6009),
THE AUTO TRACKING FUNCTION
WILL BE DEFEATED.
TP6003 Å–1
(FROM VIDEO CIRCUIT)
ENVELOPE
85
ENVELOPE VOLTAGE
DETECTOR
V-LOCK
(TO VIDEO CIRCUIT)
PULSE 22
V-LOCK PULSE
GENERATOR
D
(FROM VIDEO CIRCUIT)
76
V-SYNC
HEAD AMP
CONTROL
ROTARY
(TO VIDEO CIRCUIT)
SIGNAL
97
ROTARY SW
GENERATOR
HEAD AMP
SELECT
(TO HEAD AMP CIRCUIT)
SIGNAL
98
HEAD AMP SW
GENERATOR
(FROM HEAD AMP CIRCUIT)
99
ENVELOPE DET