CYLINDER ASSEMBLY
V(R)-1
V-COM
V(L)-1
CL253
1
2
3
Video Block Diagram
1-9-13 1-9-14 HE473BLV
(DECK ASSEMBLY)
VIDEO (R)-1
HEAD
SP
HEAD
AMP
EP
HEAD
AMP
REC FM
AGC
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
FROM
SERVO/SYSTEM
CONTROL BLOCK
C-SYNC
RF-SW
D-REC-H
C-ROTA
D-V-SYNC
H-A-SW
H-A-COMP
V-ENV
LUMINANCE
SIGNAL
PROCESS
CHROMINANCE
SIGNAL
PROCESS
C-SYNC
V-ENV
H-A-COMP
H-A-SW
D-V-SYNC
C-ROTA/RF-SW
VIDEO (L)-1
HEAD
VIDEO (L)-2
HEAD
VIDEO (R)-2
HEAD
V(L)-2
V-COM
V(R)-2
4
5
6
TU701(TUNER UNIT)
IC301
(Y/C SIGNAL PROCESS)
IC501 (OSD)
REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC
SERIAL
DECORDER
V-OUT1
1
V-IN1
1
3 3
V-OUT2
1
V-IN2 3
1
3
JACK CBA
48
50
52
56
24
6
50
55
52
19
20
JK101
V-OUT1
V-IN1
19
20
JK102
CL151
CL152
CL101
CL102
V-OUT2
V-IN2
61
63
96
95
93
94
90
89
88
87
CHARA.
INS.
CCD 1H DELAY
SP
BYPASS
MUTE
PB/EE
IN1
TUNER
IN1
TUNER
MUTE
PB/EE
FRT
IN2
FRT
IN2
AGC
PR
R
Y
C
P
R P R P
EP
Y. DELAY
Y/C
MIX
+
21
7978
AGC VXO
OSD
CHARACTER
MIX
COLOR
-IN
FBC
1/2
58 59
65
2928
IIC-BUS SDA
DAVN-L
IIC-BUS SCL
69684643
" " = 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.
67
84
83
71
62
70
D-REC-H
80
BUFFER
Q101
BUFFER
Q102
TP301
X301
4.433619MHz
C-PB
WF2
VIDEO-OUT
TU-VIDEO
V-IN1TO
SERVO/SYSTEM
CONTROL BLOCK
VIDEO-IN
BUFFER
Q351
MAIN CBA
TP502
RF-SW
WF1
J23
V-OUT
WF1
TRICK-H
SECAM-H
PB-H OUT
IC370 (PAL/SECAM DECTECTOR)
PAL/SECAM
DETECTOR
25 44
17
14
18
2
16
29
1
28
IC640 (VPS)
VPS-V
IIC-BUS SDA
DAVN-L
IIC-BUS SCL
6
14
7
16
F,G,H,I,J,K,L,M
D,E,I,J,L,M
D,I,L
Comparison Chart of
Models & Marks
Model Mark
VR540/39
VR540/58
VR740/02
D
E
F
VR740/07 G
VR740/16
VR740/39
H
VR740/58
VR742/16
VR742/39
I
J
K
VR742/58
L
M
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