Technics SL-1500C - Page 6

TechnicalInformation forHi‐Fi Audio System
Coreless Direct Drive Motor
6
Inthedirectdrivesystem,themotorisconnecteddirectlytotheplattersothatthe
motorrotationspeedbecomestherotationspeedofthephonorecord.Therefore,itis
extremelyimportanttocontrolthedrivemotor’srotationspeedtoensurestability.
TheSL‐1500Cutilises thelatestmotorcontroltechnologyrefinedthroughthe
developmentofBlu‐raydiscproducts.Furthermore,theFGcoilpatternofthefull‐
circumferencedetectionFGsystemwasimprovedinprecisiontoachievemore
detailedmeasurementofplatterrotationspeed.
Plattershapeoptimised bysimulation
HighAccuracyMotorControl
Accuratesinewaveoutputbythemicrocomputerisusedasthecontrolwaveformfor
constantrotationspeedoperation.Thissinewaveissmootherthanthesimplified
sinewavegeneratedbytheexternalcoilusedintheSL‐1200MK5,thusensuring
accuratemotorcontrol.TheSL‐1500Calsoutilisesthenewestmotorcontrol
technologyrefinedthroughthedevelopmentofBlu‐raydiscproducts.Furthermore,it
incorporatestechnologiesusedinhigh‐endmodelstocorrectvariationsof
characteristicsinthepartsofthemotordrivecircuitandmagneticcircuit.
SL‐1200mk7/SL‐1500C
SL‐1200mk5