Servo Block Diagram - Sony CCD-TR317E Service Manual

3-6. SERVO BLOCK DIAGRAM

( ) : Page No. shown in ( ) indicates the page to refer on the schematic diagram.
VC-234 BOARD
IC401 wk
(4-25)
50mVp-p
IC902
13 µsec
(2/2)
SERVO
DRUM SERVO
69 28
DRUM PWM LPF
DRUM FG 116
DRUM PG 117
CAPSTAN SERVO
68 25
CAP PWM LPF
CAP FG 115
VTR/CAMERA CONTROL
1 CFG HMS 109
X0
X901
20MHz
2
X1
120
VDD
D 2.8V
101 AVRH DRUM START 50
100 A VDD DRUM ON 13
64 VDD CAP ON 62
25 VDD CAP FWD 61
IC201
MECHA VD 118 94
MECHA FLD 111 89
XCS KINUTA 19 98
VC SI 80 96 REC Y RF
79 97
VC SO
REC C RF +
78 95
XVC SCK
REC ATF
ATF
47 85
SWP PB ATF
44 87
ATF SAMPLE
16
DD-134 BOARD
(4-28)
IC401
(4/6) DRUM/CAPSTAN PWM DRIVE
LPF
CN981 CN931
14 -
-
DRUM ERROR
29 43 43 15 +
+
30
32 0.25V
PROTECT
17
VTR D/D ON
30
(CN931 14 )
21
OSC
22
13
+ CAP ERROR
27 44 44 11 -
-
10 +
IC401 wg
50mVp-p
13 µsec
CAMERA/VIDEO(2) BLOCK
(4-12)
(4-17)
IC101
VIDEO
HEAD
IC301 yf¢
CH SP1
REC RF 27
D/A 7 6 •
28
REC/PB
AMP CH SP2
PB C RF 33
A/D 49 11 •
2.4 µsec
34
3-11
IC301 tk
IC301
(4-85)
MT UNREG
VTR UNREG
PWM
+
SWITCHING CN931 CN981
58 L305
DRIVE
-
46 46 DRUM VS
• •
48 48
Q312
SWITCHING
OUTPUT
VCC 56
1 MT UNREG
MT UNREG
DRUM ON
PWM
+
SWITCHING
64 L304
DRIVE
- 45 45
• •
47 47
DRUM START
Q311
SWITCHING
IC401 qh IC401 ws
0.75Vp-p 2.8Vp-p
2.8Vp-p 25 Hz
6.7 msec
CN982
RF SWP
FOR CHECK
11
CAP FG
12
CCD-TR317E/TR417E/TR427E/TR617E/TR717E/TR918E/
TRV37E/TRV47E/TRV48E/TRV57E/TRV67E/TRV87E
IC401 tj,tl,ya»
0.75Vp-p
2.4 µsec
6.8 msec
D 2.8V
(4-28)
IC401
(5/6)
DRUM MOTOR DRIVE
9 42 63 6
COM
VS
Vcc1 Vcc2
U IN 62
V IN 60
W IN 58
CONTROL
U
LOGIC 61
OUTPUT
V
OUTPUT
59
DRIVE
DRIVE
W
BUFFER
STBY 57
1
SELSLP2
RF
5 2
R408-410
(4-28)
DRUM DRIVE
CURRENT SENS IC401
(6/6)
DRUM FG/PG WAVE SHAPER
DRUM FG WAVE
16 LPF
SHAPER
V REF
DRUM FG
22
WAVE SHAPER
CN978
CAP VS 7
•
8
CAPSTAN MOTOR DRIVE
VCC 2 VTR UNREG
VTR UNREG 9 Vcc
H1(+) U IN 1
H1(-) U IN 2
H2(+) V IN 1
H2(-) V IN 2
W IN 1
H3(+)
W IN 2
H3(-)
CAP ON STANDBY CAP ON STBY
3
CAP FWD FRC FRC
4
VCC1
D 2.8V 10
IC001
(2/2)
FG OUT
CAPSTAN FG
1
WAVE SHAPER
OFF SET
ADJ
CFG DUTY 2
CAMERA/VIDEO(2)
(IC291 21 )
(SEE PAGE 3-8)
3-12
B201-MECHA
(SEE PAGE 4-27)
1.1Vp-p
CN976
COM
4
M901
DRUM MOTOR
U
9
•
10
7 V
•
8
5 W
•
6
FG
18
3
FG
FG-PG-COM
19 2
PG
PG
20
1
IC001
(1/2)
VS
M902
CAPSTAN MOTOR
U
+
CAP U
-
+ V CAP V
120
LOGIC
-
W
+ CAP W
-
POWER
VH+ C HALL GND
OFF
HE
POWER VH-
H1(+)
H
H1(-)
H2(+)
CFG VCC
H
H2(-)
H3(+)
H
H3(-)
C HALL VCC
CFG(+)
CFG(-)
CAPSTAN FG