Servo - Hitachi VM-H675LA Service Manual

SERVO [VCA] SCHEMATIC DIAGRAM
E
To
VIDEO
PROCESS
1T
11L
14L
2L
1T
13L
1L
8L
D 7L
1K
9K
5L
3K
6L
C 9L
4L
12L
8K
2K
3L
7K
5K
10L
6K
4K
B To
REGULATOR
1K-9K
To
SYSTEM
CONTROL
1L-14L
SERVO WAVEFORMS
1-A TL660 3.1Vp-p 2-A PG601-3 3.2Vp-p
1V/ 500µ sec.cm 0.5V/ 5m sec.cm
REC/PLAY REC/PLAY
A
1
2
MECHA.
To
ADJUST
LOADING
TERMINAL
MOTOR
2 3
4
L.MOTOR DRIVE
0 0
7.1 0
7.1 4.8
0 0
TL0660
1
NOTE:ONE VOLTAGE:PB OR REC MODE
TWO VOLTAGES:PB AND (REC) MODE
: WAVEFORMS No.
3-B PG601-5 580mVp-p 4-A PG601-7 3.2Vp-p
0.2V/ 5m sec.cm 0.5V/ 5m sec.cm
PLAY REC/PLAY
3
SERVO, WAVEFORMS
To
CAPSTAN MOTOR
0.7 0.9 1.9 1.0 0 1.0 0 1.0 0 1.2 7.1 3.2
LB1991V-TLM
CAPSTAN MOTOR DRIVE
0 0 3.0 1.8 1.8 1.4 1.4 1.0 1.0 1.6 1.6 1.6
4 5
6 - 11 6 - 12

SERVO

To
CYL.MOTOR
1.3 1.3 1.3 0.8 1.6 0.8 0.8 3.2 7.1 1.3 0 0
IC0631
LB1950V-TLM
CYL.MOTOR DRIVE
0 1.3 1.3 1.3
1.3 1.3 1.6 0.4 1.1 0.8 0 0
SERVO [VCA]
6 7
0.7
3.1 0.7
0.9 1.3 0
8