LG DV5921N Schematic
CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM
Power Dead.
IC101 is defective.
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Warning |
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Symbol denotes AC ground. |
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Parts that are shaded are critical |
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With respect to risk of fire or |
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Symbol denotes DC chassis ground. |
NOTES) |
electricial shock. |
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VF(+) Power Dead.
F102 is defective.
IMPORTANT SAFETY NOTICE |
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE |
NOTE : |
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WHEN SERVICING THIS CHASSIS, UNDER NO CIR- |
SCHEMATIC FOR EASY IDENTIFICATION. |
1. Shaded( |
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) parts are critical for safety. Replace only |
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THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- |
with specified part number. |
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CUMSTANCES SHOULD THE ORIGINAL DESIGN BE |
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FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, |
2. Voltages are DC-measured with a digital voltmeter |
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MODIFIED OR ALTERED WITHOUT PERMISSION |
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IMPLEMENTATION OF THE LATEST SAFETY AND |
during Play mode. |
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FROM THE LG ELECTRONICS CORPORATION. ALL |
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PERFORMANCE IMPROVEMENT CHANGES INTO |
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COMPONENTS SHOULD BE REPLACED ONLY WITH |
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THE SET IS NOT DELAYED UNTIL THE NEW SERVICE |
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TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR- |
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LITERATURE IS PRINTED. |
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VF(-) Power Dead.
ZD101 is defective.
12V Power Dead.
IC103 is defective.
8V Power Dead.
IC105 is defective.
3.3V Power Dead.
IC106 is defective.
5V Power Dead.
Q107 is defective.
'02. 12. 26 R16006A
3-31 |
3-32 |
2. SYSTEM CIRCUIT DIAGRAM
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No Power on |
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Video signal not |
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appeared |
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AUDIO DAC |
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interface |
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VIDEO |
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interface |
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RF & MOTOR DRIVE |
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interface |
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System not working or |
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screen is abnormal |
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System not working or |
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Digitron not display |
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System not operate |
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Digitron all not display |
Program download fail |
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System not working |
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Video signal Y |
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Video signal Color |
'02. 12. 26 R14600A |
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3-33 |
3-34 |
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