SECTION 3
ELECTRICAL CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE……………………………….
3-2
1. Power check flow……………………………………………………………………….3-2,3
DETAILS AND WAVERORMS ON SYSTEM TEST AND DEBUGGING….
3-4
1.DSP clock 20MHz;Volume control STB, DATA and CLOCK…………………………3-4
2.AT89C51 reset is high active;WM8740 DAC STB,DATA and CLOCK……………...3-5
BLOCK DIAGRAMS…………………………………………………………….
3-6
1. Digital
section…………………………………………………………………………...3-6
2. Analog
input
section……………………………………………………………………3-7
3. Volume
and
EXT.section/L/R/C/SW…………………………………………………..3-8
4. Volume
and
EXT.section/SL/SR/SBL/SBR…………………………………………..3-9
5. Component
video………………………………………………………………………3-10
6. S video section…………………………………………………………………………3-11
7. Composite
video……………………………………………………………………….3-12
WIRING DIAGRAM…………………………………………………………….
3-13
1.Wiring diagram……………………………………………………………….
3-13
CIRCUIT DIAGRAMS…………………………………………………………
3-14
1. Power supply circuit diagram………………………………………………………..3-14
2. Front panel circuit diagram…………………………………………………………..3-15
3. HDMI
circuit
diagram…………………………………………………………………3-16
4. CSS circuit diagram…………………………………………………………………..3-17
5. Audio
circuit
diagram…………………………………………………………………3-18,19,20
6. Video
circuit
diagram…………………………………………………………………3-21,22,23
PRINTED CIRCUIT DIAGRAM
…………………………………………………….3-24
1. PSU
board…………………………………………………………………………….3-24
2. FPP
board……………………………………………………………………………..3-25
3. HDMI
board……………………………………………………………………………3-26
4. CSS
board……………………………………………………………………………..3-27
5. Audio
board……………………………………………………………………………3-28
6. Video
board……………………………………………………………………………3-29
3-1
Summary of Contents for M15 C/AH
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