Marantz PM-14S1 - Appendix; Explanation Terms; About the Protection Circuit

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ENGLISH
MM/MC cartridge select
Therearetwotypes--MM(MovingMagnet)andMC(Moving
Coil)--ofcartridgesforturntable.
Astheoutputlevelsforthesetwotypesofcartridgesdier,
thesettingofthephonoequalizerthatismountedinthisunit
mustbeswitchedaccordingtothetypeofcartridgeforyour
turntable.Forswitching,usethePHONOMCbuttononthis
unit.
Speaker impedance
ThisisanACresistancevalue,indicatedinΩ(Ohms).Greater
powercanbeobtainedwhenthisvalueissmaller.
Protection circuit
This is a function to prevent damage to devices within the
power supply when an abnormality such as an overload,
excessvoltageoccursorovertemperatureforanyreason.
Ifamalfunctionoccursinthisunit,thepowerindicatorblinks
redandtheunitswitchestostandbymode.
Appendix
Explanation terms
Thisunit isequipped witha protectioncircuitto protectthe
ampliercircuitsandspeakersystemfromdamage.
If the protection circuit is activated, the sound is instantly
muted.
Inthiscase,themessage“PROTECT”ashesonthedisplay
panel,andtheSTANDBYindicatoralsoashes.
Todeactivatetheprotectioncircuit,turntheunitothenback
onagainafterabout1minuteormore.
At power on
Forabout8secondsafterthepoweristurnedon,theprotection
circuit is activated, muting the sound to give the amplier
circuitstimetostabilize.Oncetheampliercircuitsstabilize,
theprotectioncircuitisreleased,andaudioisenabled.
In the event of overcurrent
Theprotectioncircuitisactivatedifcurrentexceedingacertain
levelisdetected,whichcanhappenifexcessivesignalowis
inputtotheamplieroriftheunitisconnectedtoaspeaker
system of less than 4 Ω/ohms impedance. The protection
circuitisalsoactivatedifaspeakercableshorts.
Insuchcases,themessage“PROTECT”ashesonthedisplay,
andthevolumeisautomaticallyreduced.Afterapproximately
8 seconds, the protection circuit is released. Therefore, the
volumeneedsreadjustingtocontinuenormaluse.
If the overcurrent continues, the amplier shuts itself OFF,
andtheSTANDBYindicatorashes.
Todeactivatetheprotectioncircuit,turntheunitothenback
onagainafterabout1minuteormore.
If excessive ultrabass signals are input
Theprotectioncircuitisalsoactivatedifultrabasssignalsare
input. In such a case, the STANDBY indicator ashes, and
the volume is automatically reduced. After approximately
8 seconds, the protection circuit is released. Therefore, the
volumeneedsreadjustingtocontinuenormaluse.Ifexcessive
ultrabasssignal inputcontinues orifDC voltageis detected
owingtotroublewiththeamplier,theampliershutsitself
OFF,andtheSTANDBYindicatorashes.
Todeactivatetheprotectioncircuit,turntheunitothenback
onagainafterabout1minuteormore.
About the protection circuit
If the main-amplifier overheats
Theprotectioncircuitisactivatedifthetemperatureofthemain
ampliersectionrisesaboveacertainlevel,whichcanhappen
iftheamplieriscontinuouslyusedwithexcessivesignalow
beinginputtoit.Theprotectioncircuitisalsoactivatedwhen
thespeciedoperating temperatureis exceeded,which can
happeniftheventsontopoftheamplierarecoveredorif
the amplier is installed on a cramped audio rack. In such
a case, the STANDBY indicator ashes, and the volume is
automatically reduced. After approximately 8 seconds, the
protection circuit is released. Therefore, the volume needs
readjustingtocontinuenormaluse.
If the temperature does not suciently fall within a certain
amount of time after the protection circuit activation, the
ampliershutsitselfOFF,andtheSTANDBYindicatorashes.
To deactivate the protection circuit, turn the unit o, let it
standuntilitcoolsdown,thenturnitONagain.
In the event of amplifier trouble
Theprotectioncircuitisactivated,andthepoweris
automaticallyshutOFF,ifanabnormalityisdetectedinthe
powercircuit.Thesamehappensifthemainfuseinside
theamplierblows.Insuchcases,theSTANDBYindicator
ashes.
Turntheunito thenafterseveralminutesturnitonagain.
Ifthe display doesnot light up, andthe STANDBY indicator
remainsashingaftertheunitisturnedonagain,theunitmay
beinfailure.
1.PM14S1N_ENG_Final_0708.indd 24 2013/07/11 19:14:19