No Power
D105~D108 are Defective
12V No Power
Q123 is Defective
5V No Power
Q126 is Defective
Switching Error
IC102, IC103 are Defective
No Power
FR101 is Defective
Switching Error
IC101 is Defective
3.3V No Power
Q121 is Defective
3-33
3-34
CIRCUIT DIAGRAMS
1. POWER (SMPS) CIRCUIT DIAGRAM
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY
WITH TYPES
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
SPECIAL COMPONENTS ARE SHADED ON THE
SCHEMATIC FOR EASY IDENTIFICATION. THIS
CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER
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.
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.
IMPORTANT SAFETY
NOTE :
Summary of Contents for DV286
Page 11: ...2 4 3 PACKING ACCESSORY SECTION ...
Page 26: ...3 15 FIG 7 2 DVD F FE RFL FIG 7 3 CD F FE RFL ...
Page 31: ...3 20 2 COMPOSITE VIDEO SIGNAL FIG 12 2 13 AUDIO OUTPUT FROM MT1389E FIG 13 1 ...
Page 32: ...3 21 CONNECTOR PICTURE 1 FULL CONNECTOR PICTURE ...
Page 33: ...3 22 CN201 22PIN 2 CN201 CONNECTOR PICTURE CN202 9PIN 3 CN202 CONNECTOR PICTURE ...
Page 34: ...3 23 CN601 12PIN 4 CN601 CONNECTOR PICTURE CN602 10PIN 5 CN602 CONNECTOR PICTURE ...
Page 35: ...3 24 CN703 12PIN 7 CN703 CONNECTOR PICTURE CN605 5PIN 6 CN605 CONNECTOR PICTURE ...
Page 36: ...3 25 CN704 9PIN P101 10PIN 8 CN704 CONNECTOR PICTURE 9 P101 CONNECTOR PICTURE ...
Page 37: ...3 26 BLOCK DIAGRAMS 1 OVERALL BLOCK DIAGRAM ...
Page 38: ...3 27 2 POWER SUPPLY BLOCK DIAGRAM ...
Page 39: ...3 28 3 SERVO BLOCK DIAGRAM ...
Page 40: ...3 29 4 MPEG MEMORY BLOCK DIAGRAM ...
Page 41: ...3 30 5 VIDEO BLOCK DIAGRAM ...
Page 42: ...3 31 6 AUDIO BLOCK DIAGRAM ...
Page 43: ...3 32 MEMO ...
Page 45: ...3 35 3 36 2 SYSTEM MPEG CIRCUIT DIAGRAM ...
Page 46: ...3 37 3 38 3 SERVO CIRCUIT DIAGRAM ...
Page 47: ...3 39 3 40 4 AV JACK CIRCUIT DIAGRAM ...
Page 48: ...3 41 3 42 5 KARAOKE USB CIRCUIT DIAGRAM 8 9 TOOL ...
Page 49: ...3 43 3 44 6 TIMER KEY CIRCUIT DIAGRAM 4 7 TOOL ...
Page 50: ...3 45 3 46 7 TIMER KEY CIRCUIT DIAGRAM 5 TOOL ...
Page 51: ...3 47 3 48 8 TIMER KEY CIRCUIT DIAGRAM 8 TOOL ...
Page 52: ...3 49 3 50 9 TIMER KEY CIRCUIT DIAGRAM 9 TOOL ...
Page 54: ...3 53 3 54 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 56: ...3 57 3 58 5 SMPS P C BOARD 6 SUB SCART OPTIONAL PART 430mm 7 SUB 5 1CH OPTIONAL PART 430mm ...
Page 57: ...3 59 3 60 MEMO MEMO ...
Page 63: ...4 6 MEMO ...
Page 65: ...4 9 4 10 MEMO MEMO ...
