Servo Block Diagram - Panasonic PV-DF204 Service Manual

SERVO BLOCK DIAGRAM

CAPSTAN MOTOR ASS'Y
CAPSTAN
MOTOR
COIL
HALL
ELEMENT
HALL
ELEMENT
HALL
ELEMENT
CAPSTAN
FG HEAD
CYLINDER UNIT
P6202
7
PG
COIL P6202
6
7
P6202
1
P6202
2
P6202
3
P6202
CYLINDER
4
MOTOR
AUDIO CONTROL HEAD UNIT
MAIN C.B.A.
P4092 P4002
5
CONTROL
HEAD P4092 P4002
6
CAPSTAN
MOTOR
DRIVE
PIN P6201
6
POSITION
PIN P6201
DIFFERENTIAL
SIGNAL
AMP 7
PROCESS
PIN P6201
5
PIN P6201
3
IC6201 (CYLINDER MOTOR DRIVE)
15
PG/FG PULSE
18
GENERATOR
16
22
23
CYLINDER
14
MOTOR
25 DRIVE
20
IC6001 (SERVO MICROCONTROLLER)
94
5
95
6
V1 4 Vp-p
TP6206
10 ms
2 V
V1 2 Vp-p
1 V 10 ms
TP6207
97
CAPSTAN DIRECTION CONTROL
74
V1 3 Vp-p
TP6203
1 ms
2 V
86
D6201 D6202
87
TP6201
6
TP6209
INTEGRATION
76
7
5
3
V1
4.80 Vp-p
1 V 0.5 ms
90
11
INTEGRATION 77
TP6208 TP6202
REC CTL
ENVELOPE
AMP
DETECTOR
PB-ON
- +
POSITIVE PB
CTL SLICER
AMP
NEGATIVE PB
CTL SLICER
V-LOCK
SELECT
PULSE
GENERATOR
COUNT
SCHMIT
DOWN
AMP
PG
SELECT
PWM
CAPSTAN SPEED
COMPENSATOR
REC CTL
MIX / TR MM
CYLINDER/ CAPSTAN
GENERATOR
PHASE COMPENSATOR
MIX
CYLINDER SPEED
COMPENSATOR
PWM
PG/ FG HEAD SW
HEAD AMP
SEPARATOR
SIGNAL
CONTROL
GENERATOR
ROTARY
SIGNAL
SLOW
CAP TORQUE LIMIT
GENERATOR
/STILL
CONTROL
HEAD AMP
SELECT
SIGNAL
GENERATOR
PV-DF204/PV-DF2004/PV-DF2004-K/PV-DF274/PV-DF2704/PV-DF2704-K
TP6003
(FROM IC3001(40))
9
ENVELOPE VOLTAGE
(TO IC3001(13))
13
V-LOCK PULSE
V1 5 Vp-p
10 ms
2 V
TP6205
(TO IC3501(1))
18
HEAD SW PULSE
(FROM IC3351(2))
56
VIDEO
(TO IC3001(49))
15
ROTARY SW
(TO IC3501(32))
16
HEAD AMP SW
(FROM IC3501(33))
17
ENVELOPE DET
SERVO BLOCK DIAGRAM