Table Of Contents - LG MAX220UB Service Manual

SECTION 1
SERVICING PRECAUTIONS .............................................................................................................................1-2
ESD PRECAUTIONS ..........................................................................................................................................1-3
SPECIFICATIONS ..............................................................................................................................................1-4
LOCATION OF USERS CONTROLS .................................................................................................................1-5
HOW TO SETTING THE OPTION CODE ..........................................................................................................1-6
FIRMWARE UPGRADE METHOD .....................................................................................................................1-7
HOW TO CONNECT AUDIO SET TO POWER SUPPLY ..................................................................................1-8
SECTION 2
ELECTRICAL TROUBLESHOOTING GUIDE ....................................................................................................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 .......................................................................................2-8
5. USB ERROR CORRECTION FLOW CHART ............................................................................................2-9
6. AUX ERROR CORRECTION FLOW CHART ..........................................................................................2-11
WAVEFORMS ...................................................................................................................................................2-12
CIRCUIT VOLTAGE CHART ............................................................................................................................2-13
INTERNAL BLOCK DIAGRAM OF ICs ...........................................................................................................2-14
1. IC601 (BD3702FV) ...................................................................................................................................2-14
2. IC801 (LV5693P) .....................................................................................................................................2-15
3. IC804 (TB2931HQ) ..................................................................................................................................2-17
WIRING DIAGRAM ...........................................................................................................................................2-19
BLOCK DIAGRAMS .........................................................................................................................................2-21
1. MAIN BLOCK DIAGRAM .........................................................................................................................2-21
2. FRONT BLOCK DIAGRAM ......................................................................................................................2-23
3. ELECTRICAL BLOCK DIAGRAM ............................................................................................................2-25
CIRCUIT DIAGRAMS .......................................................................................................................................2-27
1. MAIN_1 CIRCUIT DIAGRAM ...................................................................................................................2-27
2. MAIN_2 CIRCUIT DIAGRAM ...................................................................................................................2-29
3. FRONT CIRCUIT DIAGRAM ...................................................................................................................2-31
PRINTED CIRCUIT BOARD DIAGRAMS ........................................................................................................2-33
1. MAIN P.C.BOARD ...................................................................................................................................2-33
2. FRONT P.C.BOARD ................................................................................................................................2-35
SECTION 3
1. CABINET AND MAIN FRAME SECTION ..................................................................................................3-1
SECTION 4
CONTENTS
SUMMARY
ELECTRICAL
EXPLODED VIEWS
REPLACEMENT PARTS LIST
1-1