MAINTENANCE ALIGNMENT PROCEDURE
M-DAC
M-DAC-Ageing Test Step-P1/2
16
MDAC Soak Test procedure Rev 0.1
Post Soak test performance verification
1.
Insure that Mains input voltage is set to +/- 5% of rated input voltage.
2.
Lock to an External SPDIF source Play Music file / source.
3.
Insure Display, Knob and Buttons function correctly.
4.
Confirm R/C function.
5.
Insure audio is replayed correctly (Headphones can be used).
6.
Soak test for > 8Hours.
7.
Insure Display and Buttons function correctly.
8.
Insure audio is replayed correctly (Headphones can be used).
9.
Inspect internals of Unit for Blown Electrolytic capacitors Blown SMD Components etc.
1.
Set to COAX1, (Set Digital Generator on AP to 44.1KHz, 24 Bit, Dither, 997Hz, 0dB).
2.
Check Unit is “Locked” and indicates 44.1kHz Freq. (As indicated on Display).
3.
Check L & R SE Audio Outputs, Level 2.1V RMS (+/- 0.1dB).
4.
Check L & R SE Audio THD, 0.0025% Max (Norm 0.001%).
5.
Set AP to 997Hz -60dB, check L&R SE, SNR >54dB (=>114dB).
6.
Set AP to -120dB 997Hz, Check L&R SE outputs, DC Level <= +/-5mV.
7.
Set Digital Generator on AP to 44.1KHz, 24 Bit, Dither, 997Hz, 0dB.
8.
Check L & R Balanced Audio Outputs, Level 4.2V RMS (+/- 0.1dB).
9.
Check L & R Balanced Audio Outputs THD, 0.001% Max (Norm 0.0006%).
10. Set AP to 997Hz -60dB, check L&R Balanced, SNR >58dB (=>118dB).
11. Set AP to 44.1KHz, 24 Bit, Dither, 997Hz, 0dB.
12. Confirm COAX2, Optical 1&2 function (Locked indicated on display & Audio Signal
output).
13. Confirm USB function, replay Stereo 997Hz 0dB on PC media player, confirm SE Level
2.1V RMS (+/- 0.1dB), Audio THD, 0.0025% Max (Norm 0.001%).
14. Confirm R/C function.
Summary of Contents for M-DAC
Page 1: ...M DAC...
Page 2: ...M DAC VERSION HISTORY Rev V01 Date Update Content July 10 2012 First Version...
Page 7: ...ASSEMBLY SKETCH M DAC 4 M DAC Product Exploded Drawing 1 1 P...
Page 8: ...ASSEMBLY SKETCH M DAC 5 3 2 1 M DAC Packing Exploded Drawing 1 1 P...
Page 9: ...SCHEMATIC DIAGRAM M DAC M DAC Mainboard P1 1 6...
Page 10: ...SCHEMATIC DIAGRAM M DAC M DAC Frontboard P2 2 7...
Page 11: ...SCHEMATIC DIAGRAM M DAC M DAC PSU Board P1 1 8...
Page 12: ...WIRING DIAGRAM M DAC M DAC Wiring Diagram P1 1 9...
Page 13: ...SILK TOP SCREEN OF BOTTOM M DAC Mainboard Top Silkscreeen P1 1 M DAC 10...
Page 14: ...M DAC SILK TOP SCREEN OF BOTTOM M DAC Mainboard SMD Silkscreeen P1 1 11...
Page 15: ...SILK TOP SCREEN OF BOTTOM M DAC Front Board Top Silkscreeen P1 1 M DAC 12...
Page 16: ...SILK TOP SCREEN OF BOTTOM M DAC Front Board SMD Silkscreeen P1 1 M DAC 13...
Page 17: ...SILK TOP SCREEN OF BOTTOM M DAC PSU Board Top Silkscreeen P1 1 M DAC 14...
Page 18: ...SILK TOP SCREEN OF BOTTOM M DAC Front Board SMD Silkscreeen P1 1 M DAC 15...
Page 29: ......