NAD T512C, Service Manual

Page: 12 / 65

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 ..........................................................................................................3-13
2. Power (SMPS) Block Diagram ..............................................................................................3-14
3. RF/CD DSP/DVD DSP/DVD servo Block Diagram ..............................................................3-14
4. Audio Block Diagram ............................................................................................................3-15
5. MPEG & MEMORY 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 Circuit Diagram ...........................................................................................................3-27
6. MEMORY Circuit Diagram .....................................................................................................3-29
7. FRONT Circuit Diagram.........................................................................................................3-31
8. A/V JACK Circuit Diagram ....................................................................................................3-33
• CIRCUIT VOLTAGE CHART ....................................................................................................3-35
PRINTED CIRCUIT DIAGRAMS
............................................................................................3-39
1. MAIN P.C.BOARD ...................................................................................................................3-39
2. POWER,A/V,FRONT P.C.BOARD ..........................................................................................3-41
3. KEY P.C.BOARD.....................................................................................................................3-43