LG LST-4200A Service Manual - Page 2

Tabble of Contents

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Tabble of Contents CHAPTER 1. OVERVIEW PRODUCT SPECIFICATION 1-2 PARTS NAME 1-3 CHAPTER 2. EXPLODED DIAGRAM CABINET AND MAIN FRAME 2-1 PACKING ACCESSORIES 2-3 (INCLUDING REMOTE-CONTROLLER) CHAPTER 3. CIRCUIT SW_UPDATE Method 3-1 Diagnostic S/W Application 3-5 Flow Chart for Repair 3-7 1. Power Operation 3-7 2. Audio Part 3-10 3. SYSTEM Part 3-18 4. VIDEO Part 3-24 5. DVI Part 3-32 6. ATSC Front-End Part 3-34 7. NTSC Front-End Part 3-36 Whole Block Diagram 1. Whole Block Diagram -1 3-37 2. Whole Block Diagram -2 3-39 3. Whole Block Diagram -3 3-41 4. POWER Block Diagram 3-43 5. SYSTEM CONTROL Block Diagram . . . .3-45 6. AUDIO PROCESSING Block Diagram . . .3-47 7. VIDEO PROCESSING Block Diagram . . .3-49 Circuit Diagram 1. POWER Circuit Diagram 3-51 2. SYSTEM Circuit Diagram 3-51 3. VIDEO Circuit Diagram _1 3-55 4. VIDEO Circuit Diagram _2 3-57 5. AUDIO Circuit Diagram 3-59 6. FRONT END & POWER Circuit Diagram .3-61 7. FRONT BOARD Circuit Diagram 3-63 Parts Layout 1. DIGITAL MAIN Parts Layout(TOP) . . . . .3-65 2. DIGITAL MAIN Parts Layout (BOTTOM) .3-65 3. FRONT Parts Layout 3-69 4. SMPS(POWER) Parts Layout 3-69 5. KEY Parts Layout 3-71 6. TIMER Parts Layout 3-72 CHAPTER 4. REPLACEMENT PART LIST Replacement Parts List 4-1 1-1

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Tabble of Contents
CHAPTER 1. OVERVIEW
PRODUCT SPECIFICATION . . . . . . . . . . . . . .1-2
PARTS NAME . . . . . . . . . . . . . . . . . . . . . . . . .1-3
CHAPTER 2.
EXPLODED DIAGRAM
CABINET AND MAIN FRAME
. . . . . . . . . . . .2-1
PACKING ACCESSORIES
. . . . . . . . . . . . . .2-3
(INCLUDING REMOTE-CONTROLLER)
CHAPTER 3. CIRCUIT
SW_UPDATE Method . . . . . . . . . . . . . . . . . . .3-1
Diagnostic S/W Application
. . . . . . . . . . . . . . .3-5
Flow Chart for Repair
. . . . . . . . . . . . . . . . . . .3-7
1. Power Operation . . . . . . . . . . . . . . . . . . . .3-7
2. Audio Part
. . . . . . . . . . . . . . . . . . . . . . .3-10
3. SYSTEM Part . . . . . . . . . . . . . . . . . . . . .3-18
4. VIDEO Part . . . . . . . . . . . . . . . . . . . . . . .3-24
5. DVI Part . . . . . . . . . . . . . . . . . . . . . . . . .3-32
6. ATSC Front-End Part
. . . . . . . . . . . . . . .3-34
7. NTSC Front-End Part . . . . . . . . . . . . . . .3-36
Whole Block Diagram
1.Whole Block Diagram -1 . . . . . . . . . . . . .3-37
2.Whole Block Diagram -2 . . . . . . . . . . . . .3-39
3.Whole Block Diagram -3 . . . . . . . . . . . . .3-41
4. POWER Block Diagram
. . . . . . . . . . . . .3-43
5. SYSTEM CONTROL Block Diagram . . . .3-45
6. AUDIO PROCESSING Block Diagram . . .3-47
7. VIDEO PROCESSING Block Diagram . . .3-49
Circuit Diagram
1. POWER Circuit Diagram . . . . . . . . . . . . .3-51
2. SYSTEM Circuit Diagram . . . . . . . . . . . .3-51
3. VIDEO Circuit Diagram _1
. . . . . . . . . . .3-55
4. VIDEO Circuit Diagram _2
. . . . . . . . . . .3-57
5. AUDIO Circuit Diagram . . . . . . . . . . . . . .3-59
6. FRONT END & POWER Circuit Diagram .3-61
7. FRONT BOARD Circuit Diagram . . . . . . .3-63
Parts Layout
1. DIGITAL MAIN Parts Layout(TOP)
. . . . .3-65
2. DIGITAL MAIN Parts Layout (BOTTOM)
.3-65
3. FRONT Parts Layout . . . . . . . . . . . . . . . .3-69
4. SMPS(POWER) Parts Layout
. . . . . . . .3-69
5. KEY Parts Layout . . . . . . . . . . . . . . . . . .3-71
6.TIMER Parts Layout . . . . . . . . . . . . . . . .3-72
CHAPTER 4. REPLACEMENT
PART LIST
Replacement Parts List
. . . . . . . . . . . . . . . .4-1