1-9-1
BLOCK DIAGRAMS
Servo/System Control Block Diagram
HG470BLS
M
M
LOADING
MOTOR
CYLINDER ASSEMBLY CAPSTAN MOTOR
DRUM
MOTOR
PG
SENSOR
CONTROL
HEAD
CL504
AC HEAD ASSEMBLY
MAIN CBA
KEY- 2
C-CONT
C-FG
D-PFG
ST-S
T-REEL
C-F/R
KEY- 1REMOCON-IN
CTL(+)
RESET
FTV-IN
REC-SAF-SW
PG-DELAY
CTL(-)
D-V-SYNC
D-REC-H
RF-SW
H-A-SW
C-ROTA
END-S
14
90
87
94
95
76
10
4
80
34
78
2
13
15
18
33
16
31
8
7
RS501
REMOTE
SENSOR
LM-FWD/REV
81
D-CONT
77
(DECK ASSEMBLY)
T-REEL
TU-VIDEO
FROM
VIDEO
BLOCK
V-IN1
Q771,
Q772
Q501
RESET
Q503
S-REEL
79
SW-POINT
AL+5V
VR501
TIMER+5V
AND
S-REEL
PS503
TP506
IIC-BUS SDA
IIC-BUS SDA
IIC-BUS SCL
A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL
Hi-Fi-H-SW
A-MODE
A-MUTE-H
Hi-Fi-H-SW
A-MODE
H-A-COMP
17
V-ENV
6
P-ON-H
C-POW-SW
P-ON-H
C-POW-SW
P-DOWN-L
67
66
86
P-DOWN-L
C-SYNC
58
SW506
FROM/TO
VIDEO BLOCK
FROM/TO
Hi-Fi AUDIO
BLOCK
TO
AUDIO BLOCK
SDA
SDA
SCL
SCL
TU701(TUNER UNIT)
IC503 (MEMORY)
72
32
19
83
IIC-BUS SCL
D-V-SYNC
D-REC-H
RF-SW
H-A-SW
C-ROTA
IIC-BUS SDA
H-A-COMP
V-ENV
C-SYNC
IIC-BUS SCL
71
3
5
SDA
SCL
12
11
LD-SW
9
AL+12V/+20.5V
P-ON+15V
AL+5V
AL+5V
SW507
AL+12V
P-ON+5V
LD-SW
AL+5V
D502
S-LED
FROM/TO
POWER
SUPPLY
BLOCK
LINE-MUTE
KEY
SWITCH
KEY
SWITCH
TP507
SENS-INH
CAPSTAN
MOTOR
" " = SMD
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.
IC561
(LED DISPLAY)
IC501
(SERVO/SYSTEM CONTROL)
IC771
(COMPARATOR)
DRV-DATA
DRV-STB
DRV-CLK
DRV-DATA
DRV-STB
DRV-CLK
FP562
LED DISPLAY
D1
D2
D3
D4
a
f
j
b
c
d
23
22
21
28
2
1
68
69
70
20
11
16
14
13
e
12
17
7
LINE-MUTE
28
5
6
9
14
13
8
11
10
2
64
4
5
CL502
12
P-ON+15V
11
AL+12V(2)
10
GND
9
D-PFG
8
D-CONT
7
LM-FWD/REV
6
GND
5
C-CONT
4
C-F/R
3
C-FG
2
P-ON+5V
1
AL+12V/+20.5V
SENSOR CBA
SENSOR CBA
END-S
ST-S
Q504
Q505
REC-SAFETY
P-ON+5V
END-S
P-ON+5V
CL504
2 CTL(+)
1 CTL(-)
M
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