NAD M5 C/AH Service Manual page 11

SECTION 3 ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power check flow................................................................................. 3-2
2. System operation flow...........................................................................3-3
3. Test & debug flow................................................................................. 3-4,9
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGING
1. System 27MHz clock,reset,flash R/W signal...............................................3-10
2. SDRAM clock...................................................................................... 3-11
3. TRAY OPEN/CLOSE signal....................................................................3-11
4. SLED control related signal(NO disc control)..............................................3-12
5. LENS control related signal(NO disc control)............................................. 3-13
6. FOCUS control related signal(NO disc control).......................................... 3-14
7. SPINDLE control WAVEFORM............................................................... 3-15
8. FOCUS ON WAVEFORM...................................................................... 3-16
9. RF WAVEFORM..................................................................................3-17
10. ES6168F Audio optical and coaxialoutput(SPDIF)..................................... 3-17
11. ES6168F Video output to Audio DAC...................................................... 3-18
12. Audio output(1KHz odB)...................................................................... 3-18
BLOCK DIAGRAMS
1. Overall block diagram........................................................................... 3-19
2. Power(SMPS) block diagram..................................................................3-20
3. Servo block diagram............................................................................. 3-21
CIRCUIT DIAGRAMS
1. Power(SMPS) circuit diagram................................................................. 3-22
2. Decode board-ES6168 section................................................................3-23,24
3. Decode board-DSP section.....................................................................3-25,26
4. Decode board-H-POWER & DRIVER section............................................. 3-27
5. Decode board-RF section...................................................................... 3-28
6. Decode board-CONNECT AND 232 section............................................... 3-29
7. Audio board.......................................................................................... 3-30,31
8. 232 AND AMP module board..................................................................3-32
9. Front panel board...................................................................................3-33
CIRCUIT VOLTAGE CHARGE
PRINT CIRCUIT BOARD DIAGRAM
1. Decode board........................................................................................3-42,43
2. Audio board.........................................................................................3-44,45
3. SMPS board........................................................................................ 3-46
4. Front panel board.................................................................................3-47,48
5. RS232 board........................................................................................3-47,48
6. AMP module board.............................................................................. 3-47,48
.....................................................................3-34,41
3-1