Related Manuals for NAD M 52
Summary of Contents for NAD M 52
- Page 1 M 52 Digital Music Vault...
- Page 2 WHAT’S IN THE BOX IMPORTANT! • The NAD M50 that appears in this guide is a reference model only and not included in the NAD M52 package. • The NAD M52 is compatible only with the NAD M50. • The NAD M52 cannot be connected directly to a PC or MAC.
- Page 3 NAD M50 Digital Music Player ©2013 NAD ELECTRONICS INTERNATIONAL, A DIVISION OF LENBROOK INDUSTRIES LIMITED All rights reserved. NAD and the NAD logo are trademarks of NAD Electronics International, a division of Lenbrook Industries Limited. M52_QS_v04 - Jan 2013...
- Page 4 M52 References for Service Manual (Rev. A) M52 LED Indication standby: power LED amber, HDD LEDs off power up: power LED steady blue, HDD LEDs interleaving flashing red/blue short‐time power loss (e.g. USB unplug and plug back in a second or two): Power LED steady blue, HDD LEDs flashing red/blue at the same time unit active healthily: all LEDs steady blue and the unit can be accessed and recognized unit has invalid RAID set: all LEDs steady blue but the unit can't be accessed or not recognized. rebuilding: LED of the rebuilding HDD flashing blue rebuild success: LED of the rebuilding HDD steady blue rebuild failure: LED of the rebuilding HDD flashing red individual disk healthy: LED of the HDD steady blue disk failure: LED of the HDD flashing red disk missing: LED of the HDD steady red NOTE: 1) “unit has invalid RAID set” may be caused by inserting a HDD that was part of other RAID set unit. Wiping the last few sectors of the HDD will solve the problem (see “Rebuild” note 1). Or if it’s caused by something else, re‐initialize and reconfigure the RAID set is required which will cause the data loss. 2) “disk failure” may be caused by SATA port failure if the disk itself is healthy. Replacing the failed disk with a new one or unplug and plug back the failed disk, and rebuild RAID array will solve the problem (see how to rebuild RAID array section). ...
- Page 5 Initialize /Configure the RAID Array 1) When is RAID array initialization needed When the RAID array is invalid or when two or more of the HDDs are replaced, re‐initialization of the RAID array is required. But the initialization will destroy all data previously stored on the disks and is completely irreversible! 2) How to initialize and configure RAID array Make sure all the hard disks are healthy. • Power on the unit • Press "reset" button at the rear panel soon after the hard disk LEDs starts to flash • Press "reset" button again after the LEDs flash 20 times after the above step. After this step, all the HDD LEDs become steady blue. At this point, all the data in the hard disks are lost and the unit has to be formatted. • Partition and format the unit ...
- Page 6 Rebuild 1) When is RAID array rebuild needed If one and only one of the hard disks is either missing or fails, i.e. that hard disk's LED becomes steady red or flashing red, the unit RAID array needs rebuild. If two or more than two hard disks fail, RAID array can't be rebuilt and the data in the unit will be lost. At this point, to continue use the unit, you will have to replace all the broken/failed hard disks and re‐ initialize the RAID array. 2) How to rebuild a RAID array with same healthy HDD in the unit This case happens when one healthy HDD is removed and then put back at the same position. • Power down the unit • Unplug one healthy HDD • Power up the unit until it’s steady (2 HDDs LED blue, unplugged HDD LED red) – this step leaves the unit in degraded mode • Power down the unit • Plug the HDD back • Power up the unit – this step will rebuild the RAID array of the unit 3) How to rebuild a RAID array with a new healthy HDD This case happens when one HDD is replaced with a new healthy HDD. • Power down the unit • Remove the failed/broken hard disk • Replace it with a new healthy hard disk • Power back on the unit. Press the tiny "reset" button at the rear panel after HDD LEDs flashes 22 times. This will start the RAID array rebuild. During rebuild, the new HDD LED will be flashing blue and the rest LEDs are steady blue. ...
- Page 7 NOTE: 1) “new healthy hard disk” It must be at least the size of the smallest disk used when the set of RAID disks was created. Disk with identical capacity as the other two is recommended, with the best option of matching the same model number of the other two disks. It could be a brand new hard disk bought from store or used one as long as it is healthy, could be either formatted or unformatted, could have existing data or empty, but it must NEVER be used by other RAID device before. If the HDD is used by other RAID device before, make sure to WIPE the last few sectors of the HDD where the RAID information is stored. ****** example to wipe the last 2MB or less of a 1TB HDD that is connected to Ubuntu Linux ****** remi@ubuntu:~$ sudo dd if=/dev/zero of=/dev/sdb bs=1024 count=2048 seek=976761000 dd: writing `/dev/sdb': No space left on device (this warning is ok) 1585+0 records in 1584+0 records out 1622016 bytes (1.6 MB) copied, 1.43649 s, 1.1 MB/s...
- Page 8 FAQ: 1) What is degraded mode? M52 works in degraded mode when one and only one of the healthy RAID array set of disks is removed. While in degraded mode, the unit continues to operate without loss of data, storage capacity, or performance. However, the unit is no longer secure and will suffer data loss if one or more disk fails. 2) One of the HDD LED flashes blue for 1 or 2 minute after power up. What is it doing and why? The short‐time LED flash means the corresponding HDD is rebuilding. It's because the previous power off happens before disks commit their caches to disk, which causes the data or parity inconsistency on the disk. The short‐time rebuild upon power up will correct the inconsistency. 3) Can I swap any of the HDDs in the unit or between units? No. Each disk has a unique global ID which ensures that disks cannot be swapped between sets – although sets with swapped disks might behave correctly, the data is useless because it is mixed up. 4) Why does it take so long to power up the unit? The system switches on the disks independently and with sufficient delay between disks to minimize peak power consumption during motor spin‐up. 5) Can other HDD brands been used (e.g. WD red)? M52 allows the SATA disk drives to be of different brands and sizes. The capacity of a set of RAID disks is twice of the smallest disk size, leaving the upper part of any larger disk unused. However, HDDs of identical capacities and same models are recommended. In case you can’t get identical HDDs for a RAID set, be aware that: The smallest HDD disk size can’t be greater than 1TB due to configuration When M52 already works in degraded mode, a new HDD plugged into the array for rebuild must be at least the size of the smallest disk used when the set of RAID disks was created HDD disk voltage tolerance can’t be greater than 5% for +5v and 10% for +12v If HDD disks are not SATA II or SATA III type, the data transmission speed will be decreased and the rebuild time will be longer 6) If the controller board is replaced but the existing three HDDs are kept using, what will happen? If the controller board is configured same as the one before replaced, i.e. same RAID mode, disk number, and flash type/speed etc., and the existing three HDDs are kept same position, the RAID set of disks should work just fine as the serial numbers of the HDDs all match and they are automatically treated as a complete set. ...
- Page 9 REF.N0 Part No. Description Qty. 88-212002-0A Shipping Box 88-212001-0A Gift Box 89-211001-0 EPE Bottom 00-65200-00 M52 Unit 87-211001-0 Non-woven Cloth Bag 90-001001-0 Poly-bag 89-211002-0 EPE Top 88-043003-0 M15Accessories Box 30-46521-00 Quick Start Guide 88-043004-0 M15 Box Sheet A15-16250-07 AC Cord A15-13125-00 AC Cord(AH) 29-65201-00...
- Page 10 S009 T001 T002 T002 S009 C005 C004 C003 C002 S008 R002 R003 R001 S003 C007 C010 S012 C008 C012 S011 S004 S010 C009 S003 C009 S005 S002 S004 F006 C011 S001 F004 C001 C006 F003 S006 S007 F005 F002 F001...
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Page 11: Exploded View Parts List
EXPLODED VIEW PARTS LIST REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. C001 67-212001-1 Chassis C002 67-212004-0 HDD Left Bracket T001 67-211002-0 Top Cover C003 67-212005-0 HDD Right Bracket T002 76-046001-0 Screw Washer C004 85-212001-0 Anti-Vibrate Grommet Rigid Disk (HD) C005 37-31000-00 C006... - Page 12 M52 BLOCK DIAGRAM PIC18F26K20 HDD1 RAID Controllers OXUFS936QSE SMPS HDD2 3.3V 1.2V HDD3 STB KEY...
- Page 13 keyboard schematic KGND D104 D102 D103 D101 2LED 2LED 2LED BLUE BLUE BLUE Blue/Amber SATA0 SATA1 SATA2 CON118 S101 KEY1 12 HEADER KGND KEY Board C200 C201 C202 C203 0.1uF 0.1uF 0.1uF 0.1uF KGND...
- Page 14 smps board schematic 0.8A600V BR902 CY901 D901 P6KE200A L901 C904 D904 10uF/400V 3~5uH 1000uF/10V 1N5822 C908 D902 +5VS UF4006 C909 PGND1 C907 C911 R907 1000uF/10V 100nF 100R D903 C906 +12VP Q901 MUR120 R909 T901 5.1K EE16 U902 47UF/50V PC817 R906 U903 R901 +5VS...
- Page 15 DCDC board schematic J801 J802 C806 C807 100uF/16V 100nF +5VS U801 +5VS C804 R801 124k1% Vout VBST L801 R802 100nF VREG5 Vout C803 3.3uH 5A C809 C810 C811 10pF C808 C801 C805 R803 100nF 10UF 10UF 10UF C802 330uF/6.3V 22.1K1% TPS54327 3.3nF...
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Page 16: Keyboard Layout
keyboard Layout... - Page 17 DCDC board layout...
- Page 18 SMPS board layout...