Table Of Contents - LG LAC5800(R) Service Manual

SECTION 1 SUMMARY
SERVICING PRECAUTIONS .........................................................................................................................1-2
ESD PRECAUTIONS ......................................................................................................................................1-3
SPECIFICATIONS ...........................................................................................................................................1-4
FIRMWARE UPGRADE METHOD .................................................................................................................1-5
HOW TO CONNECT AUDIO SET TO POWER SUPPLY ............................................................................1-7
SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS .................................................................2-1
1. MAIN, FRONT & TUNER PART................................................................................................................2-1
2. CDP PART.................................................................................................................................................2-4
3. USB PART.................................................................................................................................................2-7
• CIRCUIT VOLTAGE CHART ......................................................................................................................2-9
• WAVEFORMS ...........................................................................................................................................2-10
INTERNAL BLOCK DIAGRAM OF ICs ......................................................................................................2-12
1. IC301 (HA13173AH) ...............................................................................................................................2-12
2. IC402 (µPD78F1165) ..............................................................................................................................2-14
3. IC503 (LC786923W) ...............................................................................................................................2-17
4. IC504 (AM5810) ......................................................................................................................................2-22
5. IC601 (BD3805F) ....................................................................................................................................2-24
6. IC801 (TB2926HQ) .................................................................................................................................2-25
7. IC901 (PT6524).......................................................................................................................................2-26
BLOCK DIAGRAM ........................................................................................................................................2-29
CIRCUIT DIAGRAMS ....................................................................................................................................2-31
1. MAIN CIRCUIT DIAGRAM ......................................................................................................................2-31
2. FRONT CIRCUIT DIAGRAM...................................................................................................................2-33
3. CDP-1 CIRCUIT DIAGRAM ....................................................................................................................2-35
4. CDP-2 CIRCUIT DIAGRAM ....................................................................................................................2-37
5. AUX CIRCUIT DIAGRAM........................................................................................................................2-39
PRINTED CIRCUIT BOARD DIAGRAMS ...................................................................................................2-41
1. MAIN P.C.BOARD(TOP VIEW) ...............................................................................................................2-41
2. MAIN P.C.BOARD(BOTTOM VIEW) .......................................................................................................2-43
3. FRONT P.C.BOARD................................................................................................................................2-45
4. CDP P.C.BOARD.....................................................................................................................................2-47
5. AUX P.C. BOARD....................................................................................................................................2-49
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION..................................................................................................3-1
2. MECHANISM(PICK-UP) SECTION ..........................................................................................................3-3
SECTION 4 REPLACEMENT PARTS LIST
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CONTENTS
1-1
.................................................4-1
LGE Internal Use Only