LG LCS500UN, Service Manual

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1-1
CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS .............................................................................................................................1-2
ESD PRECAUTIONS ..........................................................................................................................................1-3
SPECIFICATIONS ..............................................................................................................................................1-4
LOCATION OF USERS CONTROLS .................................................................................................................1-5
FIRMWARE UPGRADE METHOD .....................................................................................................................1-6
HOW TO CONNECT AUDIO SET TO POWER SUPPLY ..................................................................................1-7
SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS .......................................................................2-1
1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART .................................................................2-1
2. SOUND ERROR CORRECTION FLOW CHART ......................................................................................2-4
3. DISPLAY ERROR CORRECTION FLOW CHART ....................................................................................2-7
4. TUNER ERROR CORRECTION FLOW CHART .....................................................................................2-10
5. CDP ERROR CORRECTION FLOW CHART .........................................................................................2-11
6. USB ERROR CORRECTION FLOW CHART ..........................................................................................2-14
7. BLUETOOTH ERROR CORRECTION FLOW CHART (OPTIONAL) .....................................................2-16
8. AUX ERROR CORRECTION FLOW CHART ..........................................................................................2-17
• WAVEFORMS ...........................................................................................................................................2-18
• CIRCUIT VOLTAGE CHART ....................................................................................................................2-20
INTERNAL BLOCK DIAGRAM OF ICs ...........................................................................................................2-23
1. IC301 (HA13173AH) ................................................................................................................................2-23
2. IC801 (TB2946HQ) ..................................................................................................................................2-25
3. IC802 (BD3702FV) ...................................................................................................................................2-26
4. IC901 (MC5502) .......................................................................................................................................2-27
WIRING DIAGRAM ...........................................................................................................................................2-29
BLOCK DIAGRAM ...........................................................................................................................................2-31
CIRCUIT DIAGRAMS .......................................................................................................................................2-33
1. MAIN CIRCUIT DIAGRAM .......................................................................................................................2-33
2. FRONT CIRCUIT DIAGRAM ...................................................................................................................2-35
3. CDP CIRCUIT DIAGRAM ........................................................................................................................2-37
PRINTED CIRCUIT BOARD DIAGRAMS ........................................................................................................2-39
1. MAIN P.C.BOARD ...................................................................................................................................2-39
2. FRONT P.C.BOARD ................................................................................................................................2-41
3. CDP P.C.BOARD .....................................................................................................................................2-43
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION ..................................................................................................3-1
2. MECHANISM(PICK-UP) SECTION ...........................................................................................................3-3
SECTION 4 REPLACEMENT PARTS LIST