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AV-20FD22
69
CRT
65
66
67
NOTE:
The following waveforms were measured at the point of the corresponding
balloon number in the schematic diagram.
2-56
No.51821
AV-20FD22 STANDARD CIRCUIT DIAGRAM
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, fo r
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
DVD BLOCK DIAGRAM
POWER BLOCK DIAGRAM
CONNECTION DIAGRAM
CIRCUIT DIAGRAMS
SYSCON PCB MPEG SCHEMATIC DIAGRAM
SYSCON PCB SDRAM SCHEMATIC DIAGRAM
SYSCON PCB SYSCON SCHEMATIC DIAGRAM
SYSCON PCB VIDEO ENCODER SCHEMATIC DIAGRAM
AV PCB POWER SCHEMATIC DIAGRAM
AV PCB MICON/TUNER SCHEMATIC DIAGRAM
AV PCB VIF/SIF/CHROMA SCHEMATIC DIAGRAM
AV PCB SOUND AMP SCHEMATIC DIAGRAM
AV PCB I/O SCHEMATIC DIAGRAM
AV PCB AV SW SCHEMATIC DIAGRAM
AV PCB COMB FILTER SCHEMATIC DIAGRAM
AV PCB STEREO SCHEMATIC DIAGRAM
OPERATION PCB SCHEMATIC DIAGRAM
MAIN PCB TV POWER SCHEMATIC DIAGRAM
MAIN PCB DEFLECTION SCHEMATIC DIAGRAM
CRT PCB SCHEMATIC DIAGRAM
PATTERN DIAGRAMS
SYSCON PCB PATTERN
AV PCB PATTERN
OPERATION PCB PA TTERN
MAIN/CRT PCB PATTERN
WAVEFORMS
0103VP
H.K.
are critical for safety. For continued safety, replace safety critical components only with
R209
AV-20FD22
2
3
9
11
43
53
Mar.2001 No.51821
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