LG BH5140S Service Manual page 16

DIGITAL DISPLAY &
MEDIA TRAINING MASTER ................................ 2-2
11. DISTORTED PICTURE ................................... 2-2
12. NO PICTURE .................................................. 2-7
13. PICTURE COLOR ......................................... 2-12
14. NOISE/AUDIO PROBLEMS .......................... 2-14
15. MISCELLANEOUS ........................................ 2-17
16. BD-HTS ......................................................... 2-26
1
ONE POINT REPAIR GUIDE ............................. 2-27
1. NO POWER PROBLEM .................................. 2-27
2. NO BOOTING WHEN YOU TURN THE
UNIT ON, NO MESSAGE OR "PLEASE
WAIT"ON FRONT PANEL .............................. 2-29
3. WIRED NETWORK CONNECTION ERROR.. 2-38
4. BAD HDMI VIDEO / AUDIO OUTPUT ............ 2-39
5. NO SPEAKER OUTPUT ................................. 2-40
ELECTRICAL TROUBLESHOOTING GUIDE .. 2-41
1. SYSTEM POWER SUPPLY ON
SMPS BOARD ................................................ 2-41
2. AMP POWER SUPPLY ON SMPS BOARD ... 2-42
3. POWER SUPPLY ON MAIN BOARD ............. 2-43
4. SYSTEM PART ............................................... 2-44
5. NO AUDIO OUTPUT ....................................... 2-45
6. NO HDMI OUTPUT ......................................... 2-47
WAVEFORMS ...................................................... 2-48
1. SYSTEM PART - 1 ......................................... 2-48
2. SYSTEM PART - 2 (SYSTEM MEMORY) ...... 2-49
3. AUDIO PART - 1 (S/PDIF) .............................. 2-50
4. AUDIO PART - 2 (I2S) .................................... 2-51
5. HDMI PART .................................................... 2-52
SECTION 2
ELECTRICAL
CONTENTS
WIRING DIAGRAM ............................................. 2-53
BLOCK DIAGRAM .............................................. 2-55
CIRCUIT DIAGRAMS ......................................... 2-57
11. SMPS - POWER CIRCUIT DIAGRAM .......... 2-57
12. MAIN - MICOM CIRCUIT DIAGRAM ............ 2-59
13. MAIN - POWER CIRCUIT DIAGRAM ........... 2-61
14. MAIN - CPU CIRCUIT DIAGRAM ................. 2-63
15. MAIN - MEMORY CIRCUIT DIAGRAM ........ 2-65
16. MAIN - LOADER CIRCUIT DIAGRAM .......... 2-67
17. MAIN - ADC/ DIR CIRCUIT DIAGRAM......... 2-69
18. MAIN - I/O CIRCUIT DIAGRAM .................... 2-71
19. AMP - PWM CIRCUIT DIAGRAM ................. 2-73
10. AMP - AMP CIRCUIT DIAGRAM .................. 2-75
11. JACK CIRCUIT DIAGRAM
(OPTIONAL PART) ........................................ 2-77
12. FRONT CIRCUIT DIAGRAM ........................ 2-81
CIRCUIT VOLTAGE CHART ............................. 2-83
PRINTED CIRCUIT BOARD DIAGRAMS ......... 2-85
1. SMPS P. C. BOARD ....................................... 2-85
2. MAIN P. C. BOARD ........................................ 2-87
3. AMP P.C.BOARD ............................................ 2-89
4. JACK P. C. BOARD (OPTIONAL PART) ........ 2-91
5. FRONT P. C. BOARD ..................................... 2-93
2-1