NAD T 572, Service Manual

Page: 13 / 67

3-1
SECTION 3
ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE
......................................................................3-2
1. Power(SMPS) Circuit ...............................................................................................................3-2
2. µ-com Circuit............................................................................................................................3-3
3. MPEG Circuit............................................................................................................................3-6
4. Front Circuit(Digitron & Key) ................................................................................................3-7
5. RF/Servo Circuit ......................................................................................................................3-8
BLOCK DIAGRAMS
..................................................................................................................3-12
1. Overall Block Diagram ..........................................................................................................3-12
2. Power (SMPS) Block Diagram ..............................................................................................3-13
3. RF/CD DSP/DVD DSP/DVD servo Block Diagram ..............................................................3-14
4. Audio Block Diagram ............................................................................................................3-15
5. MPEG Block Diagram...........................................................................................................3-16
CIRCUIT DIAGRAMS
................................................................................................................3-17
1. Power (SMPS) Circuit Diagram ............................................................................................3-17
2. DVD DSP Circuit Diagram .....................................................................................................3-19
3. Drive & RF Circuit Diagram ..................................................................................................3-21
4. MPEG Circuit Diagram ..........................................................................................................3-23
• WAVEFORMS ...........................................................................................................................3-25
5. Audio DM & 5.1CH Circuit Diagram .....................................................................................3-27
6. TIMER & Key Circuit Diagram ..............................................................................................3-29
7. A/V Circuit Diagram ...............................................................................................................3-31
8. Jack Circuit Diagram(T572AH) .............................................................................................3-33
9. Jack Circuit Diagram(T572C)................................................................................................3-35
• CIRCUIT VOLTAGE CHART .........................................................................................................3-37
PRINTED CIRCUIT DIAGRAMS
............................................................................................3-41
1. MAIN P.C.BOARD ...................................................................................................................3-41
2. AV JACK P.C.BOARD.............................................................................................................3-43
3. SMPS P.C.BOARD ..................................................................................................................3-44
4. FRONT P.C.BOARD................................................................................................................3-43