Luma VCR425, Service Manual

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CYLINDER ASSEMBLY
V(R)-1
V-COM
V(L)-1
CL253
1
2
3
Video Block Diagram
1-7-3 1-7-4 HC341BLV
(DECK ASSEMBLY)
VIDEO (R)-1
HEAD
SP
HEAD
AMP
EP
HEAD
AMP
REC FM
AGC
TO 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
RF-SW/C-ROTA
VIDEO (L)-1
HEAD
VIDEO (L)-2
HEAD
VIDEO (R)-2
HEAD
V(L)-2
V-COM
V(R)-2
4
5
6
TU701
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 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
IN2
IN2
AGC
P R
R
Y
C
P
R P R P
EP
Y. DELAY
Y/C
MIX
+
21
79 78
AGC VXO
OSD
CHARACTER
MIX
FBC
1/2
58 59
65
29 28
69 68 46 43
67
84
83
71
62
70
D-REC-H 80
BUFFER
Q101
BUFFER
Q102
TP751
V-OUT
WF1
TU-VIDEO
VIDEO
MAIN CBA
TP502
RF-SW
WF2
Q351 BUFFER
TO SERVO/SYSTEM
CONTROL BLOCK
I2C BUS SDA
I2C BUS SCL
TP301
X301
4.43MHz
C-PB
WF5