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CIRCUIT DIAGRAMS IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
COMPONENTS ARE SHADED ON THE SCHEMATIC NOTE :
FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
1. POWER(SMPS) CIRCUIT DIAGRAM MODIFIED OR ALTERED WITHOUT PERMISSION
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
2. Voltages are DC-measured with a digital voltmeter
during Play mode.
FROM THE LG CORPORATION. ALL COMPONENTS PERFORMANCE IMPROVEMENT CHANGES INTO
SHOULD BE REPLACED ONLY WITH TYPES IDENTI- THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
CAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL LITERATURE IS PRINTED.
FROM/TO Hi-Fi
OPTIONAL PART
NOTE) Warning
NOTES) Symbol denotes AC ground. NOTE) Parts that are shaded are critical
NOTES) Symbol denotes DC chassis ground. NOTE) With respect to risk of fire or
NOTE) electricial shock.
A B C D E F G H I J K L M N O P Q R S T
3-29 3-30
2. TU/IF CIRCUIT DIAGRAM
EE MODE(VIDEO)
TU MODE (AUDIO)
A B C D E F G H I J K L M N O P Q R S T
3-31 3-32
3. A/V CIRCUIT DIAGRAM
IC301 Pin 69, 68 are defective.
IC301 Pin70 is defective.
Q305 is defective. PB and Recording is failed.
PB COLOR Signal disappear. (IC301 doesn't operate.)
EE, PB Screen doesn't appear.
D301or IC301 Pin 80
REC is defective.
9 3
6
1 2 2
2
IC301 Pin 84 is defective.
Audio Tracking is failed.
14 10
7
4
5
8 13
11 12
X301 is defective.
PB COLOR Signal disappear.
Q302, Q303, Q314
are defective. Q306 is defective.
No mono Audio Signal
in PB MODE. Normal Audio signal is not recorded.
PB Y+C REC Y+C REC AUDIO
PB Y REC Y PB AUDIO(MONO)
PB C REC C WAVEFORM
PB SECAM COLOR REC SECAM COLOR
A B C D E F G H I J K L M N O P Q R S T
3-33 3-34
4. Hi-Fi CIRCUIT DIAGRAM
IC801 Pins42, 43 aredefective.
All Audio is not appear.
44 Pin is defective.
Hi-Fi Audio is not appear.
PB
REC
A B C D E F G H I J K L M N O P Q R S T
3-35 3-36
5. SCART(JACK) CIRCUIT DIAGRAM
A B C D E F G H I J K L M N O P Q R S T
3-37 3-38
6. SYSTEM CIRCUIT DIAGRAM
LED will not operate.
Q506, Q507 are defective.
3
4
6
Deck will not operate. 5
R575, R576, R577,
R578 are defective. MN101D10F
1
2 8 7