NAD M52 User manual

NAD
SERVICE MANUAL
M 52
M 52
Digital Music Vault
Digital Music Vault

NAD M50 Digital
Music Player
NAD M52 Digital Music Vault
®
M52 Digital Music Vault
Quick Setup Guide
WHAT’S IN THE BOX
CONNECT!
POWER UP!
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.
• Check out the NAD website, http://nadelectronics.com/products/masters-series/M52-Digital-Music-Vault, for further information about the NAD M52.

©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
NAD M50 Digital Music Player

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).





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




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.




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

2) “rebuildtime”
Therebuildtimetakesapproximately4hoursforthree1TBSATAIIdisk(e.g.SeagatePipelineHD2)and
2.5hoursforthree1TBSATAIIIdisk(e.g.SeagatePipelineHD).Therebuildtimevariesdependingonthe
SATAdiskcapacity.
3) “dataintegrityduringrebuild”
Duringtherebuildprocess,thedataintheunitstaysasis,andyoumaycontinueusetheunit.
4) “interruptduringrebuild”
OnlypoweringoffofM52caninterrupttherebuild.UnpluggingUSBcablewon'tstoptherebuild.We
recommendnotturningthepoweroffduringtherebuildprocess.Butifitisinterrupteditwillcontinue
rebuildingthedataassoonasthepowerisrestored.

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:
¾ThesmallestHDDdisksizecan’tbegreaterthan1TBduetoconfiguration
¾When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
¾HDDdiskvoltagetolerancecan’tbegreaterthan5%for+5vand10%for+12v
¾If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.

57
10
8
4
3
2
11
1
6
9
12
REF.N0 PartNo. Description Qty.
188-212002-0A ShippingBox 1
288-212001-0A GiftBox 1
389-211001-0 EPEBottom 1
4 00-65200-00 M52Unit 1
587-211001-0 Non-wovenClothBag 1
690-001001-0 Poly-bag 1
789-211002-0 EPETop 1
888-043003-0 M15AccessoriesBox 1
930-46521-00 QuickStartGuide 1
10 88-043004-0 M15BoxSheet 1
11 A15-16250-07 ACCord 1
A15-13125-00 ACCord(AH) 1
12 29-65201-00 USBCable 1

S009
F001
F002
F003
F004
F006
T001
R001
R002
R003
C001
C002
C003
C005
C006
C010
C011
C004
T002
F005
S001
S002
S003
S003
S004
S005
S007
S006
S008
S009
S010
S011
S012
C007
C012
S004
C009
C008
C009
T002

REF.NOPARTNO. DESCRIPTION Qty. REF.NOPARTNO. DESCRIPTION Qty.
C001 67-212001-1 Chassis 1
C002 67-212004-0 HDD Left Bracket 1 T001 67-211002-0 Top Cover 1
C003 67-212005-0 HDD Right Bracket 1 T002 76-046001-0 ScrewWasher 4
C004 85-212001-0 Anti-VibrateGrommet 18
C005 37-31000-00 Rigid Disk (HD) 3
C006 J83-043001-0Foot Assembly 4 S001 61-063106-0 Self Taping ScrewSTF3 6 4
C007 78-212001-1 Insulation Bracket 1 S002 61-023506-1 MachineScrewMB3 6 4
C008 69-212001-0 CopperSpacer 2 S003 61-023106-0 Self Taping ScrewSTB3 6 9
C009 69-212002-0 CopperSpacer 2 S004 61-373506-0 MachineScrewM3 6 8
C010 01-65209-00 PowerBOARD 1 S005 61-024506-0 MachineScrewMB4 612
C011 01-65201-00 DecodeBoard 1 S006 61-024108-0 Self Taping ScrewSTB4 8 4
C012 01-65208-00 DC-DC Board 1 S007 61-224508-1 MachineScrewMH4x8 8
S008 61-094510-0 ScrewTGM-10SW 18
S009 61-246508-1 MachineScrewMB6X8 4
F001 70-212001-1BFascia 1 S010 62-010402-0 Nut M4 1
F002 67-212002-1 Subfascia 1 S011 63-020411-0 Spring WasherΦ41
F003 70-048013-0 PowerButton 1 S012 63-010408-0 PlainWasherΦ4 1
F004 92-048001-0 Spring forButton 1
F005 76-008001-0 LEDLens 4
F006 01-65202-00 KEY Board 1
R001 67-212003-1CRearPanel 1
R002 A17-07103-12ACInlet 1
R003 A11-01101-03RockerSwitch 1
EXPLODEDVIEWPARTSLIST
14-65212-00 FFC 12p 460mm
14-65207-03 M52 7pin SATA cable L=200mm
14-65207-04 M52 7pin SATA cable L=160mm
14-65207-05 M52 7pin SATA cable L=300mm
14-65205-00 5pin SATA Power L=150mm
14-65205-01 5pin SATA Power L=200mm
14-65205-02 5pin SATA Power L=350mm

M52 BLOCK DIAGRAM
HDD1
HDD2
HDD3
OXUFS936QSE
RAID Controllers
SATA
SATASATA
STB KEY LED LED LED LED
PIC18F26K20 STB
3.3V 1.2V
SMPS

keyboard schematic
KEY Board
S101
Key
C200
0.1uF
C201
0.1uF
C202
0.1uF
C203
0.1uF
KGND
KGND
KGND
1 3
2
RED BLUE
D102
2LED
1 3
2
RED BLUE
D103
2LED
SATA0 SATA1 SATA2
1
2
3
4
5
6
7
8
9
10
11
12
CON118
12 HEADER
12
D101
Blue/Amber
1 3
2
RED BLUE
D104
2LED
KEY1

C912
104 +5VD
D907
MBRS540 C919
1000UF/16V
C922
1000UF/10V
C913
104
11 2
2
33 4
4
K901
DH1U12d1
D905
LL4007G
PGND1+12VP
U903 PC817
C909
100nF
D902
UF4006
C905
104
C907
1000uF/10V
BP 2
S
5
S
6
D4
UV 1
S
7
S
8
U902
TNY274PN
R907
100R
R906
1k
C904
10uF/400V
PGND1
PGND1
PGND1
C908
1000uF/10V
+5VS
D904
1N5822
C906
47UF/50V
D903
MUR120
R904
22K
L901
3~5uH
D901
P6KE200A
C911
104
C910
104
2 3
1
IC901
TL431 R910
5.1K
R908
10k
R909
5.1K
1
8
6
2
5
4
T901
EE16
U901 PC817
C902
104
STB
C903
100uF/25V
+12VP
C901
104
+5VS
R901
47K
R902
4.7K R903 470R
Q901
647
PGND1
PGND1
CY901
1nF
1 2 3 4
L902
10mH
CX902
220nF/250VAC
TH901
5D-11
2
1
3
4
D906
KBP208
ZV901
471KD14
R911
330k
C926
2200uF/16V
1
2
3
J901
CON3 R918
330k
R917
330k
1 2 3 4
L903
6mH
CX901
220nF/250VAC
C928
102
R924 62R
C918
100uF/400V
CY902
1nF/1KV
CY904
1nF/1KV
C917
10nF/1kV
R914
47k/3W
R922
6.8R
C924
100nF
R925
1K
R928
12K 1%
C929
104
R927
10k
2 3
1
IC902
TL431
D909
1n4007
D910
MURS120
R926
1k
R913
750K
R919
6.8k
C1
L2
X
3
S
4
F
5D7
U905
TOP246Y
C925
4.7uF/50V
C923
47uF
U906 PC817
R920
750K
R921
680K
R929
3.3k 1%
L904
22uH
C927
2200uF/16V
CY903
1nF/1KV
1
9
3
5
4
8
6
2
10
7
T902
ERL28
0 1
S901
0 1
S902
TH902
5D-11
+12VD
0 1
S903
2
1
3
4
BR902
0.8A600V
AC1
AC2
AC1
AC2 D911
MUR1620
R905
100R
R912
100R
C916
104
C930
104
+12VD
+12VD
GND
GND
+5VD
GND
1
2
3
4
5
6
7
8
9
J902
CON9
+5VD
+5VS
STB
R916
1.6K 1%
Vi
1Vo 2
g
3
Vd
4
U904 KA278R05C
R915
10K
R930
75K
C931
220F/1kV
smps board schematic

C803
10pF C801
1UF
R802
124k1%
R803
22.1K1%
C807
100nF
R801
10k
L801
3.3uH 5A
C805
330uF/6.3V
C806
100uF/16V
C802
3.3nF
C804
100nF
1
2
3
4
5
6
7
8
9
J801
EN
1
VFB
2
VREG5
3
SS
4GND 5
SW 6
VBST 7
VIN 8
U801
TPS54327
Vout
GND
Vout
GND
GND
C808
100nF
C809
10UF
C810
10UF
C811
10UF
+5VS
STB
1
2
3
4
5
6
7
8
9
J802
GND
+5VS
STB
DCDC board schematic

keyboard Layout

DCDC board layout

SMPS board layout