Power(Smps) Circuit Diagram - LG DVD2300 Manual

CIRCUIT DIAGRAM

1. POWER(SMPS) CIRCUIT DIAGRAM

IC903 PIN3 (AC110V, PLAY) IC901 PIN3 (AC110V, STAND-BY)
NOTES) Warning
NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
NOTES) electricial shock.
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C927, R918, R922 and
IC901 is defective.
IC905 are defective.
Power dead.
Power dead.
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO CIR-
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE
MODIFIED OR ALTETED WITHOUT PERMISSION
FROM THE ZENITH ELECTRONICS CORPORATION
ALL COMPONENTS SHOULD BE REPLACED ONLY
WITH TYPES IDENTICAL TO THOSE IN THE ORIGI-
IC902 is defective.
8V Power Line dead.
Q903, Q904 are defective.
Power control is abnormal.
3-18 3-19
NAL CIRCUIT SPECIAL COMPONTS ARE SHADED ON
THE SCHEMATIC FOR EASY IDENTIFICATION.
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,
IMPLEMENTATION OF THE LATEST SAFETY AND
PERFORMANCE IMPROVEMENT CHANGES INTO
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE
LITERATURE IS PRINTED.
Q908, R928, D913 and Q909 are defective.
5V Power Line dead.
Q901 and Q902 are defective.
FLD(+), FLD(-) are dead.
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during Play mode.