Block Diagrams - Philips VR340/55 Service Manual

Servo/System Control Block Diagram
Comparison Chart of
Models & Marks
Model Mark
VR340/55 A
VR340/75 B
VR740/55 C
VR740/75 D
Q504
ST-S
SENSOR CBA
Q505
END-S
SENSOR CBA
(DECK ASSEMBLY)
CL287 CL504
5 CTL(+) 5
CONTROL
6 CTL(-) 6
HEAD
AC HEAD ASSEMBLY
CYLINDER ASSEMBLY
PG
SENSOR
DRUM
M
MOTOR
M
LOADING
MOTOR

BLOCK DIAGRAMS

NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
" " = SMD
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
MAIN CBA
SW507
LD-SW
TP505
ST-S AL+5V
Q503
T-REEL
VR501
SW-POINT
CAPSTAN MOTOR
CL502
12 AL+15V
CAPSTAN
M
11 AL+12V(2)
MOTOR
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 AL+5V
1 AL+12V
1-10-1
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.
IC501
AL+5V TP501
(SERVO/SYSTEM CONTROL)
CTL
97 CTL AMP OUT
C,D
D502
S-LED
Q502 84 FF/REW-L
9 LD-SW
95 CTL(+)
94 CTL(-)
10 ST-S
4 END-S
80 T-REEL
TIMER+5V
RESET 34 RESET
Q501
REMOCON-IN
AL+5V
2 PG-DELAY
AL+5V
31 REC-
SAF-SW
SW506
REC-
SAFETY
C,D
AL+15V
AL+12V
90 D-PFG
IIC-BUS SDA
77 D-CONT
IIC-BUS SCL
81 LM-
FWD/REV
76 C-CONT
78 C-F/R
87 C-FG
AL+5V
AL+12V
C,D
FROM/TO P-ON-L
67 P-ON-L
POWER
P-DOWN-L
86 P-DOWN-L
SUPPLY
P-OFF-H
BLOCK
73 P-OFF-H
C,D
CL509
1 POWER
TP507
KEY
KEY- 1 7
SENS-INH
SWITCH
KEY CL511
KEY- 2
8
SWITCH 1 STOP/EJECT
IC561
(LED DISPLAY)
DRV-DATA 68 28 DRV-DATA G1 23
DRV-STB 69 2 DRV-STB G2 22
DRV-CLK 70 1 DRV-CLK G3 21
G4 20
S1 7
S2 8
S7 13
S8 14
S9 16
S10 17
RS501
REMOTE
14
SENSOR
A-MUTE-H 83
Hi-Fi-H-SW 19
A-MODE 32
72
71
D-REC-H 33
RF-SW 18
C-ROTA
15
D-V SYNC
13
H-A-SW 16
H-A-COMP 17
V-ENV 6
C-SYNC 58
1-10-2
SW1 CBA
KEY
SWITCH
SW2 CBA
KEY
SWITCH
FP562
LED DISPLAY
TU701(TUNER UNIT)
3 SDA
12 SDA
5 SCL
11 SCL
IC503 (MEMORY)
5 SDA
6 SCL
D-REC-H
IIC-BUS SDA
TO
IIC-BUS SCL
AUDIO BLOCK
A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL
FROM/TO
Hi-Fi-H-SW
Hi-Fi AUDIO
A-MODE
BLOCK
A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL
D-REC-H
RF-SW
C-ROTA
D-V SYNC
FROM/TO
VIDEO BLOCK
H-A-SW
H-A-COMP
V-ENV
C-SYNC
HE274BLS