Servo Block Diagram - Panasonic PV-D4733S-K Service Manual

SERVO BLOCK DIAGRAM

AUDIO CONTROL / ERASE HEAD UNIT
P4092
5
CONTROL
HEAD P4092
6
CAPSTAN MOTOR ASS'Y
CAPSTAN CAPSTAN
MOTOR MOTOR
COIL DRIVE
HALL
ELEMENT
POSITION
HALL
SIGNAL
ELEMENT
PROCESS
HALL
ELEMENT
CAPSTAN FG
PULSE GENERATOR
MR HEAD
CYLINDER UNIT
CN2
2
HALL
IC CN2
1
CN2
4
CN2
5
CN2
6
CN2
CYLINDER
7
MOTOR
MAIN C.B.A.
P4002
5
P4002
6
V1
1 V
CN1 P6201
9 9
DIFFERENTIAL
AMP CN1 P6201
1 1
V1
CN1 P6201
3 3 1 V
CYLINDER PG
PG PULSE
GENERATOR
MOTOR FG
CN1 P6201
POSITION
7 7
DET
CYLINDER
CN1 P6201
MOTOR
8 8
DRIVE
TP6208
V1 4.20 Vp-p
IC6001 (SERVO MICROCONTROLLER)
2 V 10 ms
TP6206
75
74
PB-ON
- +
72
1/2 Vcc
69
4.50 Vp-p V1
1.93 Vp-p
70
TP6207 76
0.5 ms 0.5 V 10 ms
21 CAP REV(H)/ STOP(M)/ FWD(L)
SCHMIT
TP6203
67 AMP
TP6209 INTEGRATION
33
TP6201
PWM
2.500 VDC V1 5.12 Vp-p
MIX
MIX
2 V 5 µs
5 µs
PWM
V1
4.80 Vp-p
1 V 0.5 ms
TP6204
PG/ FG
65
SEPARATOR
INTEGRATION 34
TP6202
TP6003
REC CTL
ENVELOPE
AMP 85
DETECTOR
NEGATIVE PB
CTL SLICER
V-LOCK
+5V
PULSE
24
GENERATOR
POSITIVE PB
CTL SLICER
SELECT
COUNT
DOWN
PG
SELECT
TP6205
CAPSTAN SPEED
23
COMPENSATOR
REC CTL
/ TR MM
CYLINDER/ CAPSTAN GENERATOR
PHASE COMPENSATOR
50
CYLINDER SPEED
COMPENSATOR
HEAD AMP
CONTROL
ROTARY
SIGNAL
HEAD SW
GENERATOR
98
SIGNAL
GENERATOR
HEAD AMP
SELECT
SIGNAL
99
GENERATOR
100
PV-D4733S/PV-D4743/PV-D4743S/PV-D4743S-K
(FROM IC3001(20))
ENVELOPE
VOLTAGE
(TO IC3001(93))
V-LOCK PULSE
V1 5.18 Vp-p
5 V 5 ms
(TO IC3001(49))
HEAD SW PULSE
(FROM IC3001(5))
V-SYNC
(TO IC3001(28))
ROTARY SW
(TO IC3001(50))
HEAD AMP SW
(FROM IC3001(33))
ENVELOPE DET
SERVO BLOCK DIAGRAM