SX-LX70SW
4
12
34
1
234
C
D
F
A
B
E
CONTENTS
SAFETY INFORMATION ..................................................................................................................................... 2
1. SERVICE PRECAUTIONS ............................................................................................................................... 5
2. SPECIFICATIONS ............................................................................................................................................ 6
2.1 ACCESSORIES ......................................................................................................................................... 6
2.2 SPECIFICATIONS...................................................................................................................................... 7
2.3 PANEL FACILITIES .................................................................................................................................... 8
3. BASIC ITEMS FOR SERVICE........................................................................................................................ 12
3.1 CHECK POINTS AFTER SERVICING..................................................................................................... 12
3.2 PCB LOCATIONS .................................................................................................................................... 13
3.3 JIGS LIST ................................................................................................................................................ 14
3.4 CLEANING............................................................................................................................................... 14
4. BLOCK DIAGRAM.......................................................................................................................................... 16
4.1 OVERALL WIRING CONNECTION DIAGRAM ....................................................................................... 16
4.2 OVERALL BLOCK DIAGRAM.................................................................................................................. 18
5. DIAGNOSIS.................................................................................................................................................... 20
5.1 HDMI TROUBLESHOOTING ................................................................................................................... 20
5.2 DSP TROUBLESHOOTING..................................................................................................................... 27
5.3 CIRCUIT DESCRIPTION OF DIGITAL AMP. SECTION .......................................................................... 42
5.4 SPECIFICATIONS FOR THE PROTECTION CIRCUITS FOR THE DIGITAL AMPLIFIER ..................... 43
5.5 CONDITIONS FOR SWITCHING THE ROTAIONS SPEED OF THE FAN.............................................. 44
5.6 ERROR LIST............................................................................................................................................ 45
6. SERVICE MODE ............................................................................................................................................ 49
6.1 TEST MODE ............................................................................................................................................ 49
6.2 SERVICE TEST MODE ........................................................................................................................... 51
7. DISASSEMBLY............................................................................................................................................... 54
8. EACH SETTING AND ADJUSTMENT ........................................................................................................... 59
8.1 ADJUSTMENT ......................................................................................................................................... 59
8.2 HOW TO UPDATE THE FLASH ROMS FOR VARIOUS MICROCOMPUTERS...................................... 59
8.3 HOW TO UPDATE THE DSP FLASH ROM BY PLAYING BACK A CD................................................... 61
9. EXPLODED VIEWS AND PARTS LIST.......................................................................................................... 64
9.1 PACKING (SX-LX70SW) .......................................................................................................................... 64
9.2 PACKING (AS-LX70)................................................................................................................................ 66
9.3 EXTERIOR SECTION.............................................................................................................................. 68
9.4 RECEIVER UNIT ..................................................................................................................................... 70
9.5 DISPLAY UNIT ......................................................................................................................................... 72
9.6 REMOTE CONTROL ............................................................................................................................... 74
10. SCHEMATIC DIAGRAM ............................................................................................................................... 76
10.1 MAIN ASSY (1/7) ................................................................................................................................... 76
10.2 MAIN ASSY (2/7) ................................................................................................................................... 78
10.3 MAIN ASSY (3/7) ................................................................................................................................... 80
10.4 MAIN ASSY (4/7) ................................................................................................................................... 82
10.5 MAIN ASSY (5/7) ................................................................................................................................... 84
10.6 MAIN ASSY (6/7) ................................................................................................................................... 86
10.7 MAIN ASSY (7/7) ................................................................................................................................... 88
10.8 AMP ASSY (1/2) .................................................................................................................................... 90
10.9 AMP ASSY (2/2) .................................................................................................................................... 92
10.10 CONNECTION and EARTH ASSYS .................................................................................................... 94
10.11 HDMI ASSY (1/2) ................................................................................................................................. 96
10.12 HDMI ASSY (2/2) ................................................................................................................................. 98
10.13 AINB ASSY ........................................................................................................................................ 100
10.14 FL, REMOCON and BTOB ASSYS ................................................................................................... 102
10.15 POWER SUPPLY UNIT...................................................................................................................... 104
11. PCB CONNECTION DIAGRAM ................................................................................................................. 107
11.1 MAIN ASSY ......................................................................................................................................... 108
11.2 AMP ASSY........................................................................................................................................... 112
11.3 CONNECTION ASSY .......................................................................................................................... 116
11.4 EARTH ASSYS .................................................................................................................................... 117
11.5 HDMI ASSY ......................................................................................................................................... 118
11.6 BTOB ASSY ......................................................................................................................................... 122
11.7 AINB ASSY .......................................................................................................................................... 123
11.8 FL ASSY .............................................................................................................................................. 125
11.9 POWER SUPPLY UNIT........................................................................................................................ 127
12. PCB PARTS LIST ....................................................................................................................................... 129
