NAD T747 - SECTION 2 ELECTRICAL CONTENTS

2-1
SECTION 2
ELECTRICAL CONTENTS
CONTENTS
IC BLOCK DIAGRAMS & PIN DESCRIPTION .......................................................................................... 2-2
DIAGRAM .................................................................................................................................................... 2-31
1. BLOCK DIAGRAM ................................................................................................................................ 2-31
2. WIRING DIAGRAM .............................................................................................................................. 2-39
3. SCHEMATIC DIAGRAM ...................................................................................................................... 2-41
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FRONT PART ............................................................................................................................. 2-41
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POWER PART............................................................................................................................ 2-43
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MCU PART................................................................................................................................. 2 -45
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DSP&CODEC WITH DIR PART................................................................................................... 2-47
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INPUT&VOLUME PART....................................................................................................................... 2-49
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XM&TUNER PART............................................................................................................................... 2-51
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VIDEO PART.................................................................................................................................. 2-53
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HDMI PART................................................................................................................................... 2-55
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AMP PART................................................................................................................................... 2-63
4. PRINTED CIRCUIT BOARDS ............................................................................................................. 2-67
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FRONT ............................................................................................................................... ........ 2-67
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MAIN............................................................................................................................................ 2-71
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INPUT........................................................................................................................................... 2-73
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VIDEO ......................................................................................................................................... 2-77
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HDMI............................................................................................................................................... 2-79
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AMP.................................................................................................................................................... 2-81
5. TROUBLESHOOTING .......................................................................................................................... 2-85
6. SPECIAL FUNCTION KEYS ................................................................................................................ 2-89