1-1
CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS
..........................................................................................................................................1-2
ESD PRECAUTIONS
.......................................................................................................................................................1-3
SPECIFICATIONS
.............................................................................................................................................................1-4
SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS
.............................................................................2-1
1. MAIN, FRONT & TUNER PART................................................................................................................................2-1
2. CD PART TROUBLESHOOTING .............................................................................................................................2-4
3. USB PART TROUBLESHOOTING...........................................................................................................................2-7
• WAVEFORMS
..............................................................................................................................................................2-9
INTERNAL BLOCK DIAGRAM OF ICs
......................................................................................................................2-12
1. IC518, IC701 & IC702 (S4580) ...............................................................................................................................2-12
2. IC301 (HA13173AH) ................................................................................................................................................2-12
3. IC302 (BA00CCOWFP)...........................................................................................................................................2-14
4. IC401 (µPD78F1164) ...............................................................................................................................................2-14
5. IC601 (TDA7419) .....................................................................................................................................................2-17
6. IC602 (NJM2706-DMP24) .......................................................................................................................................2-19
7. IC801 (TB2904HQ) ..................................................................................................................................................2-20
8. IC901 (LD3811) ........................................................................................................................................................2-21
BLOCK DIAGRAM
.........................................................................................................................................................2-23
CIRCUIT DIAGRAMS
.....................................................................................................................................................2-25
1. MAIN CIRCUIT DIAGRAM ......................................................................................................................................2-25
2. CDP 1 CIRCUIT DIAGRAM ....................................................................................................................................2-27
3. CDP 2 CIRCUIT DIAGRAM ....................................................................................................................................2-29
4. FRONT CIRCUIT DIAGRAM ..................................................................................................................................2-31
5. USB CIRCUIT DIAGRAM........................................................................................................................................2-33
6. LCD LIGHTING CIRCUIT DIAGRAM.....................................................................................................................2-34
PRINTED CIRCUIT DIAGRAMS
..................................................................................................................................2-35
1. MAIN P.C.BOARD....................................................................................................................................................2-35
2. CDP P.C.BOARD .....................................................................................................................................................2-39
3. FRONT P.C.BOARD ................................................................................................................................................2-40
4. USB P.C.BOARD......................................................................................................................................................2-41
5. LCD LIGHTING P.C.BOARD...................................................................................................................................2-41
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION ................................................................................................................3-1
2. MECHANISM(PICK-UP) SECTION..........................................................................................................................3-3
SECTION 4 REPLACEMENT PARTS LIST
.............................................................4-1
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
