LG MCD23 - Page 2

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1-1

Only for training and service purposes

LGE Internal Use Only

[CONTENTS]

❍ SECTION 1. GENERAL

• SERVICING PRECAUTIONS ................................................................................................ 1-2

• ESD PRECAUTIONS ............................................................................................................ 1-4

• SERVICE INFORMATION FOR EEPROM ............................................................................ 1-5

• PROGRAM DOWNLOAD GUIDE.......................................................................................... 1-6

• SPECIFICATIONS ................................................................................................................ 1-8

❍ SECTION 2. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION.............................................................................. 2-1

• MECHANISM DECK EXPLODED VIEW .............................................................................. 2-3

•

SPEAKER EXPLODED VIEW .............................................................................................. 2-5

• PACKING ACCESSORY

VIEW.............................................................................................. 2-6

❍ SECTION 3. ELECTRICAL PART

• TROUBLESHOOTING GUIDE .............................................................................................. 3-1

AUDIO PART TROUBLESHOOTING GUIDE ........................................................................ 3-1

CD PART TROUBLESHOOTING GUIDE ............................................................................ 3-10

• WAVEFORMS OF MAJOR CHECK POINT ........................................................................ 3-12

• WIRING DIAGRAM.............................................................................................................. 3-15

• BLOCK DIAGRAMS ............................................................................................................ 3-16

• CIRCUIT DIAGRAMS .......................................................................................................... 3-19

• INTERNAL BLOCK DIAGRAM OF ICs .............................................................................. 3-43

• VOLTAGE CHART................................................................................................................ 3-59

• PRINTED CIRCUIT DIARGAMS ........................................................................................ 3-63

❍ SECTION 4. DISASSEMBLY AND ASSEMBLY OF MECHANISM DECK .......... 4-1

❍ SECTION 5. REPLACEMENT PARTS LIST ................................................................ 5-1

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