LG BP330, Service Manual

Page: 14 / 83

3-1
SECTION 3
ELECTRICAL
CONTENTS
DIGITAL DISPLAY & MEDIA TRAINING MASTER
..................................................................................... 3-2
1. DISTORTED PICTURE ........................................................................................................................... 3-2
2. NO PICTURE .......................................................................................................................................... 3-7
3. PICTURE COLOR ................................................................................................................................. 3-12
4. NOISE/AUDIO PROBLEMS .................................................................................................................. 3-14
5. MISCELLANEOUS ................................................................................................................................ 3-17
6. BLU-RAY PLAYER ............................................................................................................................... 3-26
ONE POINT REPAIR GUIDE
........................................................................................................................ 3-27
1. NO POWER PROBLEM ....................................................................................................................... 3-27
2. CLOCK DOESN’T DISPLAY ................................................................................................................. 3-28
3. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL ............................................................................................................... 3-29
4. WIRED NETWORK CONNECTION ERROR ....................................................................................... 3-38
5. WIRELESS NETWORK CONNECTION ERROR ................................................................................. 3-39
6. BAD HDMI VIDEO / AUDIO OUTPUT .................................................................................................. 3-40
ELECTRICAL TROUBLESHOOTING GUIDE ............................................................................................. 3-41
1. POWER SUPPLY ON MAIN BOARD ................................................................................................... 3-41
2. SYSTEM PART ..................................................................................................................................... 3-43
3. NO HDMI OUTPUT ............................................................................................................................... 3-44
WAVEFORMS
................................................................................................................................................. 3-45
1. SYSTEM PART - 1 ............................................................................................................................... 3-45
2. SYSTEM PART - 2 (SYSTEM MEMORY) ............................................................................................ 3-46
3. HDMI PART .......................................................................................................................................... 3-47
WIRING DIAGRAM ........................................................................................................................................ 3-48
BLOCK DIAGRAM ......................................................................................................................................... 3-49
CIRCUIT DIAGRAMS .................................................................................................................................... 3-51
1. DC-DC CIRCUIT DIAGRAM ................................................................................................................. 3-51
2. MPEG CIRCUIT DIAGRAM .................................................................................................................. 3-53
3. MEMORY & STRAP CIRCUIT DIAGRAM ............................................................................................ 3-55
4. FRONT END CIRCUIT DIAGRAM ........................................................................................................ 3-57
5. A/V OUTPUT CIRCUIT DIAGRAM ....................................................................................................... 3-59
6. TIMER CIRCUIT DIAGRAM.................................................................................................................. 3-61
CIRCUIT VOLTAGE CHART ........................................................................................................................ 3-63
PRINTED CIRCUIT BOARD DIAGRAMS .................................................................................................... 3-65
1. MAIN P.C.BOARD ................................................................................................................................ 3-65
2. TIMER P.C. BOARD ............................................................................................................................. 3-65