LG XV-BD212 Service Manual page 10

DIGITAL DISPLAY & MEDIA TRAINING MASTER ......................................................................................... 2-2
ONE PONIT REPAIR GUIDE .......................................................................................................................... 2-30
1. NO POWER PROBLEM ....................................................................................................................... 2-30
2. THE LAYOUT OF MAIN BOARD ......................................................................................................... 2-32
3. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR "PLEASE WAIT" ON FRONT PANEL ... 2-34
4. WIRED NETWORK CONNECTION ERROR ....................................................................................... 2-43
5. BAD HDMI VIDEO / AUDIO OUTPUT .................................................................................................. 2-44
6. BAD HDMI VIDEO / AUDIO INPUT ...................................................................................................... 2-45
ELECTRICAL TROUBLESHOOTING GUIDE ................................................................................................. 2-46
1. POWER SUPPLY ON SMPS BOARD .................................................................................................. 2-46
2. POWER SUPPLY ON MAIN BOARD ................................................................................................... 2-48
3. FRONT PART ....................................................................................................................................... 2-50
4. SYSTEM PART ..................................................................................................................................... 2-51
5. NO CVBS VIDEO OUTPUT .................................................................................................................. 2-53
6. NO AUDIO OUTPUT ............................................................................................................................ 2-54
7. NO HDMI OUTPUT ............................................................................................................................... 2-57
8. NO HDMI INPUT ................................................................................................................................... 2-58
WAVEFORMS .................................................................................................................................................. 2-59
1. SYSTEM PART-1 (X-TAL) .................................................................................................................... 2-59
2. SYSTEM PART-2 (DDR3 MEMORY) ................................................................................................... 2-60
3. VIDEO PART (100% FULL COLOR-BAR) ........................................................................................... 2-61
4. HDMI PART .......................................................................................................................................... 2-62
5. MICOM AND MPEG I/F PART.............................................................................................................. 2-63
WIRING DIAGRAM .......................................................................................................................................... 2-65
BLOCK DIAGRAMS ........................................................................................................................................ 2-67
1. MPEG / AMP BLOCK DIAGRAM ......................................................................................................... 2-67
2. HDMI / VFD / VIDEO / DC-DC BLOCK DIAGRAM .............................................................................. 2-69
CIRCUIT DIAGRAMS ...................................................................................................................................... 2-71
1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 2-71
2. MAIN - CPU#1 CIRCUIT DIAGRAM ..................................................................................................... 2-73
3. MAIN - CPU#2 CIRCUIT DIAGRAM ..................................................................................................... 2-75
4. MAIN - DDR3, NAND CIRCUIT DIAGRAM .......................................................................................... 2-77
5. MAIN - BCM7633 FRONT END CIRCUIT DIAGRAM .......................................................................... 2-79
6. MAIN - MICOM CIRCUIT DIAGRAM .................................................................................................... 2-81
7. MAIN - HDMI CIRCUIT DIAGRAM ....................................................................................................... 2-83
8. MAIN - ADC, DIR CIRCUIT DIAGRAM ................................................................................................ 2-85
9. MAIN - DSP CIRCUIT DIAGRAM ......................................................................................................... 2-87
10. MAIN - POWER CIRCUIT DIAGRAM ................................................................................................... 2-89
11. MAIN - I/O CIRCUIT DIAGRAM ............................................................................................................ 2-91
12. PWM CIRCUIT DIAGRAM .................................................................................................................... 2-93
13. AMP CIRCUIT DIAGRAM ..................................................................................................................... 2-95
14. FRONT CIRCUIT DIAGRAM ................................................................................................................ 2-97
15. JACK CIRCUIT DIAGRAM .................................................................................................................... 2-99
CIRCUIT VOLTAGE CHART ......................................................................................................................... 2-101
PRINTED CIRCUIT BOARD DIAGRAMS ..................................................................................................... 2-103
1. MAIN P. C. BOARD DIAGRAM .......................................................................................................... 2-103
2. SMPS P. C. BOARD DIAGRAM ......................................................................................................... 2-107
3. AMP P. C. BOARD DIAGRAM ........................................................................................................... 2-109
4. FRONT P. C. BOARD DIAGRAM ....................................................................................................... 2-111
5. JACK P. C. BOARD DIAGRAM .......................................................................................................... 2-111
SECTION 2 ELECTRICAL
CONTENTS
2-1