JBL-S120P_MK2-sub-psm 维修电路原理图.pdf

Studio? SeriesS120PIIPreliminary Service ManualJBL Consumer Products250 Crossways Park Dr.Woodbury, New York 11797RadioFans.CN 收音机爱 好者资料库- CONTENTS -BASIC SPECIFICATIONS .1DETAILED SPECIFICATIONS .2CONNECTIONS.4OPERATION .7BASIC TROUBLESHOOTING.8S120PII AMPLIFIER BLOCK DIAGRAM.9S120PII MECHANICAL/PACKING PARTS LIST.10P.C.B. DRAWINGS.11S120PII ELECTRICAL PARTS LIST .13S120PII SCHEMATICS.20JBL S120PII SPECIFICATIONSAmplifier Power (RMS): 400 WattsDriver: 12 PolyPlas (polymer-coated cellulosefiber)Inputs: Line Level (switchable to LFE), BassQ andSpeaker LevelOutputs: BassQ and Speaker Level (High-Pass)Low-Pass Frequency: Continuously variable from 50Hz 150HzHigh-Pass Frequency: 150Hz when using speaker-level outputsFrequency Response: 22Hz Low-pass crossover settingDimensions (H x W x D): 17-3/16 x 16-3/16 x 18 (19 with grille)(with feet, without spikes) 437 x 411 x 457mm (483mm with grille)Weight: 56 lb/25.5kgAll features and specifications are subject to change without notice.RadioFans.CN 收音机爱 好者资料库1S120PII 300W Powered Sub/ Plate AmpLINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotesUS 120vac/60HzYes108-132120VrmsNormal OperationEU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS requiredParameterSpecUnitQA Test LimitsConditionsNotesAmp SectionType (Class AB, D, other)Dn/an/aBridge type amplifier, None of the speaker terminals must be connected to system GND at any time.Load Impedance (speaker)6Ohmsn/aNominalRated Output Power275Watts2201 input drivenLimiter prevents continuous power to exceed 220 Watts.THD Rated Power0.1%122k filterTHD 1 Watt0.1%0.522k filterDC Offset10mV-DC60 Speaker OutputsDamping factor50DF23Measured at amplifier board Measured at the speaker cable. 200 Watts, measured at speaker output terminals located at the amp board.Input SensitivityInput Frequency50Hz50Nominal Freq.L&R 425mVrms2dBTo 200 WattsSingle input drivenLFE Mode selected425mVrms2dBTo 200 WattsLFE Mode selected, single input drivenBass Q Input0.9Vrms2dBTo 200 WattsSingle input drivenSpeaker/Hi Level Input5.5Vrms2dBTo 200 WattsSingle input drivenSignal to NoiseSNR-A-Weighted100dBA85relative to rated powerA-Weighting filterSNR-unweighted90dBr85relative to rated power22k filterSNR rel. 1W-unweighted65dBr60relative to 1W Output22k filterResidual Noise Floor1mVrms2Volume max, using RMS reading DMM/VOM (or A/P)Residual Noise Floor1 mVrms(max)2Volume max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)Input ImpedanceLine Input (L, R,LFE)10Kohmsn/aNominalSpeaker/Hi Level Input10Kohmsn/aNominalFiltersLP 4th order fixed50-150 Hz 102nd order variable and 2nd order fixedSubsonic filter (HPF) 3rd OrderFixedLFE Low pass 2nd orderFixed Hz 10LFE input driven onlyLimiter THD at Max. Output PowerYESn/afunctional Maximum Output PowerFeatures-Auto - On -Off switchYES-functional Refer to ATO sectionPhase switch 0-180degfunctional Volume pot Taper (lin/log)LOG-functional A TaperVariable crossover 50-150 HzYESfunctional HP Speaker out functional HP single order filter 180 Hz 8 Ohms, 90 Hz 4 Ohms loadLFE -Normal Select switchYES-functional Disables LP filter, intended for LFE BassQ InputYESfunctional 6.3mm Phono JackBassQ OutputYESfunctional Bypass, loop-through - Designed for daisy chainInput ConfigurationLine In (L,R) & LFEYES-functional Dual RCA jackBass Q inYESfunctional 6.3m phono mono JackSpkr/Hi Level InYES-functional Binding post connector L&RSignal Sensing (ATO)Auto-Turn-On (yes/no)YESfunctional Auto - on selection switch in Auto ATO Input test frequency50Hzfunctional ATO Level LFE Input2mVfunctional ATO Level Speaker in50mVfunctional ATO Level Bass Q input 2mVfunctional ATO Turn-on time1secondsfunctional Amp connected and AC on, then input signal appliedAuto Mute/ Turn-OFF Time15minutes17T before muting, after signal is removedAuto turn of time (T) must be 10 T 17 MinutesPower on Delay time3sec.4AC Power Applied2ParameterSpecUnitQA Test LimitsConditionsNotesTransients/PopsATO Transient5mV-peakn/a Speaker OutputsTurn-on Transient50mV-peak2v-pp Speaker OutputsAC Line cycled from OFF to ONTurn-off Transient50mV-peak2v-pp Speaker OutputsAC Line cycled from ON to OFFEfficiencyEfficiency70%65Rated powerNominal Line voltage 120 VACStand-by Input Power12Watts15 nom. line voltageMaximum allowable input power under nominal Input voltage and frequency, in stand-by mode (HOT or COLD operation).Power Cons. rated power400Watts400 nom. line voltage250 Watts 6.0 Ohms nominal line voltageProtectionShort Circuit Protection YESfunctional Direct short at outputAmplifier should resume operation after short circuit condition removal Thermal Protection YESfunctional 1/8 max unclipped PowerTemperature rise in accessible metal parts should not exceed 35K rise for domestic version or 30K rise for European versions DC Offset ProtectionYES-DC present at Speaker Out leadsRelay or crowbar (for driver/fire protection), Line Fuse RatingUSA-Domestic 4AmpsType-T or Slo Blo-250 VEU2AmpsType-T or Slo Blo-250 VInternal fuse with UL/SEMKO rated holder3 When we designed theS120PIIpowered subwoofer,our goal was to offer the userthe best possible performancecombined with the mostflexible and completeinstallation options. Pleaselook over the following threeexamples to determine whichdescription best matches your system and follow thecorresponding hookupinstructions.To use the binding-postspeaker terminals withbare wire, unscrew the collaruntil the pass-through hole inthe center post is visibleunder the collar. Insert thebare end of the wire throughthe hole in the post, thenscrew the collar back downuntil the connection is tight.The holes in the center of thecollars are intended forbanana-type connectors.Dolby* Pro Logic* (Non-Digital) Speaker LevelUse this installation methodfor Dolby Pro Logic appli-cations (not Dolby Digital,DTSor other digitalprocessing), where thereceiver/processor does nothave a subwoofer output or a volume-controlled preamp(line-) level output:If your receiver features bassmanagement capabilities thatrequire you to configure yourspeaker settings, make sureto set your left- and right-frontspeakers to “LARGE”.Connect your receiver oramplifiers front left and rightspeaker terminals to the leftand right terminals on thesubwoofer that are marked“High Level In” . Connectthe left and right terminals onthe subwoofer that aremarked “High Level Out” to the correspondingterminals on the back of yourfront left and right speakers. Connect your receiver oramplifiers center, left andright surround-speakerterminals to the corre-sponding terminals on theback of your center, left andright surround speakers.SPEAKER CONNECTIONRight FrontLeft FrontCenter+ + + SubwooferRight SurroundLeft Surround+ + + + Left FrontCenter+ Left SurroundRight Front+ Right Surround+ ReceiverLRHIGHLEVELINLRLRHIGHLEVELOUT+ 4Dolby Pro Logic (Non-Digital) Line LevelUse this installation methodfor Dolby Pro Logic appli-cations (not Dolby Digital, DTSor other digital processing),where the receiver/processoris equipped with a subwooferoutput or a volume-controlledpreamp (line-) level output:Use RCA-type patch cords to connect the line-levelsubwoofer outputs on yourreceiver or amplifier to theLine Level inputs on thesubwoofer. IMPORTANT:Make sure that the LFE toggleswitch on the subwoofer isin the “Normal” position. Donot use the “LFE” positionwith Dolby Pro Logic-onlyprocessors. Note: If your receiver oramplifier only has onesubwoofer output jack, then you may connect thesubwoofer output on yourreceiver/preamplifier to eitherthe left or right Line Levelinput on the subwoofer. Itmakes no difference whichjack you choose.Connect each speaker to thecorresponding speakerterminals on your receiver oramplifier.Make sure your receiver orprocessor is configured cor-rectly: Make sure that the sub-woofer is configured as “On.”Note for advanced users: Ifyour receiver/processor has a built-in low-pass crossoverfilter for the subwoofer output,then the LFE switch shouldbe set to the “LFE” position tobypass the subwoofersinternal crossover.SubwooferOutRECEIVERL RHIGHLEVELINHIGHLEVELOUTLRLR+ IN OUT R LCROSSOVERFREQUENCYBASSQ(See ownersmanualbefore use)LINELEVEL IN(For LFEuse R or L)LEVELPHASEAUTO50Hz80Hz1800LFENORMALONOFF150HzMINMAX 56Dolby Digital or DTS (or Other Digital Surround Mode) ConnectionUse this installation methodfor Dolby Digital, DTS or otherdigital surround processors: IMPORTANT: Make sure thatthe LFE toggle switch onthe subwoofer is in the “LFE”position. Use the Line Levelinput jacks for the Low-Frequency Effects channel.Connect these jacks to theLFE output or subwooferoutput on your receiver oramplifier. Note: If your receiver oramplifier has only onesubwoofer output jack, then you may connect thesubwoofer output on yourreceiver/preamplifier to eitherthe left or right Line Levelinput on the subwoofer. Itmakes no difference whichjack you choose. Connect each speaker to thecorresponding speakerterminals on your receiver oramplifier.Make sure that you haveconfigured your surroundsound processor for“Subwoofer On” or “LFE On.”The front left, front right,center and rear speakersshould be set to “Small” or“Large” depending on theirsize and frequency response.Consult your receivers orprocessors owners manual.HIGHLEVELINHIGHLEVELOUTLRLR+ IN OUT R LCROSSOVERFREQUENCYBASSQ(See ownersmanualbefore use)LINELEVEL IN(For LFEuse R or L)LEVELPHASEAUTO50Hz80Hz1800LFENORMALONOFF150HzMINMAX SubwooferOutput/LFERECEIVER/PREAMPLIFIERThe jacks marked “BassQ” are for use with the JBLBassQ bass equalizationmodule that will be releasedin the near future. The BassQwill enable you to optimizeyour systems bass responseby equalizing the output ofmultiple subwoofers to best match your listeningenvironment. DO NOT con-nect these jacks to any otherdevice. Do not use the BassQjacks without having firstread the BassQ ownersmanual.BassQJacks7OPERATIONThe S120PIIis equipped withboth a master Power switch and an Auto turn-on/turn-off switch . In order tofunction, the S120PIImust be plugged into an activeelectrical outlet (but not anaccessories outlet on anothercomponent of your audiosystem such as a receiver),and the master Power switch must be turned on (the “” position). The Auto turn-on/turn-offswitch has three positions: OnThe subwoofer is on atall times and ready toplay program material.Auto As long as no audiosignal is received, thesubwoofer is in Standbymode to conservepower, indicated by thered color of the LEDs onthe front of the unit.When an audio signal issensed, the subwooferwill switch itself into thefully On mode and beginplaying the programmaterial. The LEDs willturn green. When aperiod of about twentyminutes goes by duringwhich no signal issensed, the S120PIIwillreturn to Standby mode,indicated by the LEDsturning red.OffThe subwoofer is off atall times, even if anaudio signal is presentat its inputs.If you plan to be away for anextended time, or if thesubwoofer will not be used,you may wish to turn off themaster Power switch .The subwoofer Level Control adjusts the volume of the subwoofer relative to the restof the system. Proper leveladjustment depends onseveral variables such asroom size, subwooferplacement, type of mainspeakers and listener position.Adjust the subwoofer level sothat the volume of the bassinformation is pleasing to you.When using a Dolby Digital/DTS receiver, adjust the LFElevel on the receiver to 0dB,and then adjust the subwooferLevel Control for thedesired amount of bass.Crossover AdjustmentsThe Crossover FrequencyControl determines thehighest frequency at which thesubwoofer reproducessounds.If your main speakers cancomfortably reproduce somelow-frequency sounds, set this control to a lowerfrequency setting, between50Hz 100Hz. This willconcentrate the subwoofersefforts on the ultradeep basssounds required by todaysfilms and music. If you areusing smaller bookshelfspeakers that do not extend tothe lower bass frequencies,set the low-pass Crossovercontrol to a higher setting,between 120Hz 150Hz. Thiscontrol is not used whenthe LFE switch is in the“LFE” position.S120PIICAUTIONRISK OF ELECTRIC SHOCKDO NOT OPENWARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.AVERTISSEMENT: POUR PRVENIR LES RISQUES DINCENDIE OUDE CHOC LECTRIQUE VITER DEXPOSER CET APPAREIL A LAPLUIE OU A LHUMIDIT.ONOFFHIGHLEVELINHIGHLEVELOUTLRLR+ IN OUT R LCROSSOVERFREQUENCYLINELEVEL IN(For LFEuse R or L)LEVELPHASEAUTOBASSQ(See ownersmanualbefore use)50Hz80Hz1800LFENORMALONOFF150HzMINMAX Level ControlPower8TROUBLESHOOTINGIf you used the High Level(speaker) inputs and there is no sound from any of thespeakers: Check that receiver/amplifieris on and a source is playing. Check that poweredsubwoofer is plugged into an active electrical outlet and is switched on . Check all wires andconnections betweenreceiver/amplifier andspeakers. Make sure all wiresare connected. Make surenone of the speaker wires are frayed, cut or punctured.Make sure no wires aretouching other wires orterminals and creating a short circuit. Review proper operation of your receiver/amplifier.If there is low (or no) bassoutput: Make sure the connectionsto the left and right “SpeakerInputs” have the correct polarity (+ and ). Make sure that thesubwoofer is plugged into anactive electrical outlet andthat both power switches are on . Adjust the Crossover point. Flip the Phase Controlswitch to the oppositeposition. If you are using a DolbyDigital/DTS receiver or processor, make sure that thesubwoofer adjustments on the receiver/processor are set up correctly. When usingthe S120PIIs Speaker Levelinputs , you should set yourreceiver to configure themain left and right speakersas “LARGE”. Slowly turn the Level Control clockwise untilyou begin to hear the desiredamount of bass.If you used the Line Levelinputs and there is nosound from the subwoofer: Check that receiver/amplifieris on and a source is playing. Check that poweredsubwoofer is plugged into anactive electrical outlet andthat both Power switches are on . Check all wires and con-nections between receiver/amplifier and subwoofer.Make sure all wires areconnected. Make sure noneof the wires are frayed, cut or punctured. Review proper operation ofyour receiver/amplifier. Slowly turn the Level Control clockwise untilyou begin to hear the desiredamount of bass. Make sure that you haveconfigured your receiver/processor so that thesubwoofer/LFE output is on.Phase ControlThe Phase Control determines whether thesubwoofers piston-like actionmoves in and out in phasewith the main speakers oropposite the main speakers.There is no correct orincorrect setting. Properphase adjustment depends onseveral variables such assubwoofer placement andlistener position. Adjust thePhase switch to maximizebass output at the listeningposition.Remember, every system,room and listener is different.There are no right or wrongsettings; this switch offersthe added flexibility to adjustyour subwoofer for optimumperformance for your specificlistening conditions withouthaving to move your speakers.If at some time in t