NAD M55 - Section 3 Electrical; Electrical Troubleshooting Guide; System Test and Waveform Analysis; Block Diagrams

SECTION
3
ELECTRICAL
C
ONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE……………………………………..3-3
1. Power check flow…………………………………………………………………………3-3
2. System operation flow……………………………………………………………………3-4
3. Test & debug flow…………………………………………………………………………3-5
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGING…….…3-11
1. System 27MHz clock,reset,flash R/W signal………………………………………….3-11
2. SDRAM clock……………………………………………………………………………..3-12
3. TRAY OPEN/CLOSE signal……………………………………………………………..3-12
4. SLED control related signal(NO disc control)…………………………………………3-13
5. LENS control related signal(NO disc control)…………………………………………3-14
6. FOCUS control related signal(NO disc control)………………………………………3-15
7. SPINDLE control WAVEFORM…………………………………………………………3-16
8. FOCUS ON WAVEFORM………………………………………………………………..3-17
9. ES6168F Audio optical and coaxialoutput(SPDIF)……………………………………3-18
10. ES6168F Video output to Audio DAC………………………………………………….3-18
11. RF WAVEFORM………………………………………………………………………….3-20
12. HDMI……………………………………………………………………………………….3-20
13. MT1389 Audio output to Audio DAC……………………………………………………3-22
14. Audio output(1KHz odB)…………………………………………………………………3-22
BLOCK DIAGRAMS……………………………………………………………………….3-23
1. Overall block diagram……………………………………………………………………3-23
2. Power(SMPS) block diagram……………………………………………………………3-24
3. SERVO block diagram…………………………………………………………………...3-25
4. MPEG & MEMORY block diagram……………………………………………………..3-26
5. Video & Audio block diagram……………………………………………………………3-27
6. GENESIS.SCART & DVI block diagram……………………………………………….3-28
CIRCUIT DIAGRAMS……………………………………………………………….……3-29
1. Power(SMPS) circuit diagram………………………………………………………….3-29
2. SYSTEM circuit diagram………………………………………………………………..3-30
3. DSP circuit diagram……………………………………………………………………..3-32
4. H-Power Driver circuit diagram…………………………………………………………3-34
5. RF circuit diagram……………………………………………………………………….3-35
6. DSD circuit diagram……………………………………………………………………..3-36
7. Audio circuit diagram…………………………………………………………………….3-38
8. Connect circuit diagram…………………………………………………………………3-40
9. Timer circuit diagram…………………………………………………………………….3-41
10. RS232 circuit diagram……………………………………………………………………3-42
11. SCART circuit diagram…………………………………………………………………..3-43
3-1