NAD-M52-nmp-sm维修电路原理图.pdf
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1、NAD SERVICE MANUAL M 52 M 52 Digital Music Vault Digital Music Vault RadioFans.CN 收音机爱 好者资料库 NAD M50 Digital Music Player NAD M52 Digital Music Vault M52 Digital Music Vault Quick Setup Guide WHATS IN THE BOX CONNECT! POWER UP! IMPORTANT! The NAD M50 that appears in this guide is a reference model o
2、nly and not included in the NAD M52 package. The NAD M52 is compatible only with the NADM50. The NAD M52 cannot be connected directly to a PC or MAC. Check out the NAD website, for further information about the NAD M52. RadioFans.CN 收音机爱 好者资料库 2013 NAD ELECTRONICS INTERNATIONAL, A DIVISION OF LENBRO
3、OK 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 RadioFans.CN 收音机爱 好者资料库 M52ReferencesforServiceManual(Rev.A) M52LEDIndication standby:powerLE
4、Damber,HDDLEDsoff powerup:powerLEDsteadyblue,HDDLEDsinterleavingflashingred/blue shorttimepowerloss(e.g.USBunplugandplugbackinasecondortwo):PowerLEDsteadyblue,HDD LEDsflashingred/blueatthesametime unitactivehealthily:allLEDssteadyblueandtheunitcanbeaccessedandrecognized unithasinvalidRAIDset:allLEDs
5、steadybluebuttheunitcantbeaccessedornotrecognized. rebuilding:LEDoftherebuildingHDDflashingblue rebuildsuccess:LEDoftherebuildingHDDsteadyblue rebuildfailure:LEDoftherebuildingHDDflashingred individualdiskhealthy:LEDoftheHDDsteadyblue diskfailure:LEDoftheHDDflashingred diskmissing:LEDoftheHDDsteadyr
6、ed NOTE: 1) “unithasinvalidRAIDset”maybecausedbyinsertingaHDDthatwaspartofotherRAIDset unit.WipingthelastfewsectorsoftheHDDwillsolvetheproblem(see“Rebuild”note1).Orif itscausedbysomethingelse,reinitializeandreconfiguretheRAIDsetisrequiredwhichwill causethedataloss. 2) “diskfailure”maybecausedbySATAp
7、ortfailureifthediskitselfishealthy.Replacingthefailed diskwithanewoneorunplugandplugbackthefaileddisk,andrebuildRAIDarraywillsolvethe problem(seehowtorebuildRAIDarraysection). RadioFans.CN 收音机爱 好者资料库 Initialize/ConfiguretheRAIDArray 1) WhenisRAIDarrayinitializationneeded WhentheRAIDarrayisinvalidorw
8、hentwoormoreoftheHDDsarereplaced,reinitializationofthe RAIDarrayisrequired.Buttheinitializationwilldestroyalldatapreviouslystoredonthedisksandis completelyirreversible! 2) HowtoinitializeandconfigureRAIDarray Makesurealltheharddisksarehealthy. Powerontheunit Pressresetbuttonattherearpanelsoonafterth
9、eharddiskLEDsstartstoflash PressresetbuttonagainaftertheLEDsflash20timesaftertheabovestep.Afterthisstep,all theHDDLEDsbecomesteadyblue.Atthispoint,allthedataintheharddisksarelostandthe unithastobeformatted. Partitionandformattheunit RadioFans.CN 收音机爱 好者资料库 Rebuild 1) WhenisRAIDarrayrebuildneeded Ifo
10、neandonlyoneoftheharddisksiseithermissingorfails,i.e.thatharddisksLEDbecomessteady redorflashingred,theunitRAIDarrayneedsrebuild. Iftwoormorethantwoharddisksfail,RAIDarraycantberebuiltandthedataintheunitwillbelost. Atthispoint,tocontinueusetheunit,youwillhavetoreplaceallthebroken/failedharddisksandr
11、e initializetheRAIDarray. 2) HowtorebuildaRAIDarraywithsamehealthyHDDintheunit ThiscasehappenswhenonehealthyHDDisremovedandthenputbackatthesameposition. Powerdowntheunit UnplugonehealthyHDD Poweruptheunituntilitssteady(2HDDsLEDblue,unpluggedHDDLEDred)thisstepleaves theunitindegradedmode Powerdownthe
12、unit PlugtheHDDback PoweruptheunitthisstepwillrebuildtheRAIDarrayoftheunit 3) HowtorebuildaRAIDarraywithanewhealthyHDD ThiscasehappenswhenoneHDDisreplacedwithanewhealthyHDD. Powerdowntheunit Removethefailed/brokenharddisk Replaceitwithanewhealthyharddisk Powerbackontheunit.Pressthetinyresetbuttonatt
13、herearpanelafterHDDLEDsflashes22 times.ThiswillstarttheRAIDarrayrebuild.Duringrebuild,thenewHDDLEDwillbeflashing blueandtherestLEDsaresteadyblue. RadioFans.CN 收音机爱 好者资料库 NOTE: 1) “newhealthyharddisk” ItmustbeatleastthesizeofthesmallestdiskusedwhenthesetofRAIDdiskswascreated.Diskwith identicalcapacit
14、yastheothertwoisrecommended,withthebestoptionofmatchingthesamemodel numberoftheothertwodisks. Itcouldbeabrandnewharddiskboughtfromstoreorusedoneaslongasitishealthy,couldbeeither formattedorunformatted,couldhaveexistingdataorempty,butitmustNEVERbeusedbyotherRAID devicebefore.IftheHDDisusedbyotherRAID
15、devicebefore,makesuretoWIPEthelastfewsectors oftheHDDwheretheRAIDinformationisstored. * example to wipe the last 2MB or less of a 1TB HDD that is connected to Ubuntu Linux * remiubuntu:$ sudo dd if=/dev/zero of=/dev/sdb bs=1024 count=2048 seek=976761000 dd: writing /dev/sdb: No space left on device
16、(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) “rebuildtime” Therebuildtimetakesapproximately4hoursforthree1TBSATAIIdisk(e.g.SeagatePipelineHD2)and 2.5hoursforthree1TBSATAIIIdisk(e.g.SeagatePipelineHD).Therebuildtimevariesdependingonth
17、e SATAdiskcapacity. 3) “dataintegrityduringrebuild” Duringtherebuildprocess,thedataintheunitstaysasis,andyoumaycontinueusetheunit. 4) “interruptduringrebuild” OnlypoweringoffofM52caninterrupttherebuild.UnpluggingUSBcablewontstoptherebuild.We recommendnotturningthepoweroffduringtherebuildprocess.Buti
18、fitisinterrupteditwillcontinue rebuildingthedataassoonasthepowerisrestored. RadioFans.CN 收音机爱 好者资料库 FAQ: 1) Whatisdegradedmode? M52worksindegradedmodewhenoneandonlyoneofthehealthyRAIDarraysetofdisksisremoved. Whileindegradedmode,theunitcontinuestooperatewithoutlossofdata,storagecapacity,or performan
19、ce.However,theunitisnolongersecureandwillsufferdatalossifoneormorediskfails. 2) OneoftheHDDLEDflashesbluefor1or2minuteafterpowerup.Whatisitdoingandwhy? TheshorttimeLEDflashmeansthecorrespondingHDDisrebuilding.Itsbecausethepreviouspoweroff happensbeforediskscommittheircachestodisk,whichcausesthedatao
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