LG XC102, Service Manual

Page: 2 / 59

1-1
CONTENTS
SECTION 1
GENERAL
SERVICING PRECAUTIONS ......................................1-2
• NOTES REGARDING HANDLING OF THE PICK-UP
• NOTES REGARDING COMPACT DISC PLAYER REPAIRS
ESD PRECAUTIONS ...................................................1-4
LOCATION OF USERS CONTROLS .........................1-5
SPECIFICATIONS ........................................................1-7
SECTION 2
EXPLODED VIEWS
CABINET EXPLODED VIEW ......................................2-1
CD MECHANISM EXPLODED VIEW .........................2-3
SPEAKER EXPLODED VIEW ....................................2-5
MODEL : XCS102F................................................2-5
PACKING ACCESSORY VIEW ...................................2-9
SECTION 3
AUDIO PART ELECTRICAL
AUDIO ELECTRICAL
TROUBLESHOOTING GUIDE
....................................3-1
1. POWER (SMPS) ................................................3-1
2. P-SENS...............................................................3-2
3. VKK CHECK.......................................................3-2
4. MICOM PART CHECK I ....................................3-2
5. MICOM PART CHECK II ...................................3-3
6. IC103(KS4CD21CS) CHECK............................3-4
7. FLD DISPLAY CHECK ......................................3-5
8. PWM MODULATION PART CHECK................3-6
9. POWER AMP PART CHECK............................3-7
10. AUX FUNCTION CHECK ..................................3-8
11. TUNER FUNCTION CHECK.............................3-9
12. PORTABLE IN FUNCTION CHECK...............3-10
INTERNAL BLOCK DIAGRAM OF ICs ...................3-11
1. AK5358 ...............................................................3-11
2. BU4052...............................................................3-11
3. LC78692NW ......................................................3-12
4. PS9829B............................................................3-13
5. PT6324...............................................................3-13
6. STR-W6753 .......................................................3-14
7. TAS5142.............................................................3-15
8. U1739EJ2V1UD00/KF2_E ...............................3-16
9. UTC MC4580.....................................................3-17
WIRING DIAGRAM ....................................................3-18
BLOCK DIAGRAM .....................................................3-20
1. SMPS BLOCK DIAGRAM...............................3-20
2. MAIN & FRONT BLOCK DIAGRAM ...............3-22
SCHEMATIC DIAGRAMS .........................................3-24
1. SMPS SCHEMATIC DIAGRAM.......................3-24
2. MAIN SCHEMATIC DIAGRAM ........................3-26
3. AMP SCHEMATIC DIAGRAM..........................3-28
4. FRONT SCHEMATIC DIAGRAM.....................3-30
PRINTED CIRCUIT BOARD DIAGRAMS ...............3-32
1. MAIN P.C.BOARD............................................3-32
2. SMPS P.C.BOARD ..........................................3-36
3. FRONT P.C.BOARD ........................................3-38
SECTION 4
CD PART ELECTRICAL
CD ELECTRICAL TROUBLESHOOTING GUIDE ....4-1
1. CD PART TROUBLESHOOTING .....................4-1
2. USB PART TROUBLESHOOTING...................4-9
WAVEFORMS OF MAJOR CHECK POINT ............4-10
1. MICOM INTERFACE WAVEFORM.................4-10
2. SLED DRIVE AND MOTOR WAVEFORM......4-11
3. FOCUS DRIVE AND MOTOR
WAVEFORM ......................................................4-11
4. SPINDLE DRIVE AND MOTOR
WAVEFORM ......................................................4-12
5. TRACK DRIVE AND MOTOR
WAVEFORM ......................................................4-12
6. RF, FOCUS AND TRACKING
ERROR WAVEFORM .......................................4-12
SCHEMATIC DIAGRAMS .........................................4-13
1. CD SCHEMATIC DIAGRAM ...........................4-13
2. USB SCHEMATIC DIAGRAM.........................4-15
PRINTED CIRCUIT BOARD DIAGRAM ..................4-17
CD P.C.BOARD ....................................................4-17
SECTION 5
REPLACEMENT PARTS LIST
........5-1