Tv-20F242; Nov. 2000 - JVC TV-20F242 Service Manual

TV-20F242

2-52 No.51768
TV-20F242 STANDARD CIRCUIT DIAGRAM
n
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The Components identified by the symbol
manufacturer’s recommended parts.
2.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PC board :R1209
3.NOTE FOR REPAIRING SERVICE
This model’s power circuit is partly different in the GND.
Please, care must be taken for the following points.
(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is
not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for
example, the chassis is pulled out.
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus
( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a
fuse or any parts will be broken.
Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.
CONTENTS
SEMICONDUCTOR BASE CONNECTIONS
BLOCK DIAGRAMS
TV BLOCK DIAGRAM
Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM
MICON/POWER/OPERATION BLOCK DIAGRAM
HIFI BLOCK DIAGRAM
CONNECTION DIAGRAM
CIRCUIT DIAGRAMS
SYSCON PCB CHROMA/IF SCHEMATIC DIAGRAM
SYSCON PCB Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM
SYSCON PCB MICON SCHEMATIC DIAGRAM
SYSCON PCB IN/OUT SCHEMATIC DIAGRAM
SYSCON PCB SOUND AMP SCHEMATIC DIAGRAM
SYSCON PCB HIFI SCHEMATIC DIAGRAM
SYSCON PCB POWER SCHEMATIC DIAGRAM
MAIN PCB TV POWER SCHEMATIC DIAGRAM
MAIN PCB DEFLECTION SCHEMATIC DIAGRAM
DIGITAL COMB FILTER PCB SCHEMATIC DIAGR
CRT PCB SCHEMATIC DIAGRAM
OPERATION PCB SCHEMATIC DIAGRAM
AV PCB SCHEMATIC DIAGRAM
DECK PCB SCHEMATIC DIAGRAM
PATTERN DIAGRAMS
MAIN/CRT PCB PATTERN
SYSCON PCB PATTERN
AV PCB PATTERN
OPERATION PCB PATTERN
DECK PCB PATTERN
WAVEFORMS
VP0011
H K

are critical for safety. For continued safety, replace safety critical components only with
R209
TV-20F242
2
3
11
13
39
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Nov. 2000 No.51768