Infinity-12-sub-sm 维修电路原理图.pdf
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1、 Cascade Series Cascade Series Model Twelve Subwoofer Model Twelve Subwoofer SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 8/2006 RadioFans.CN 收音机爱 好者资料库 - CONTENTS - BASIC SPECIFICATIONS .1 DETAILED SPECIFICATIONS.2 PACKAGING .4 CONTROLS AND CONNECTIONS.
2、5 OPERATION.7 EXPLODED VIEW.8 TEST SET UP AND PROCEDURE.9 BLOCK DIAGRAM.10 TROUBLESHOOTING FLOW CHART.11 ELECTRICAL PARTS LIST (120v) .12 PCB DRAWINGS.18 SEMICONDUCTOR PINOUTS.22 SCHEMATICS (120v).23 Basic Specifications Cascade Model Twelve Powered Subwoofer Frequency Response 32Hz 150Hz (3dB) 28Hz
3、 150Hz (6dB) Maximum Amplifier Output 300 watts RMS (20Hz 150Hz, no more than 0.1% THD) Crossover Frequencies 50Hz 150Hz, continuously variable or LFE Drivers 10 (250mm) MMD, Dual 10 (250mm) MMD passive radiators Dimensions (H x W x D) 20 x 15 x 13-7/8 (508mm x 381mm x 352mm) Weight 42 lb (19kg) Inf
4、inity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notice. Model Twelve Model Twelve Cascade Cascade RadioFans.CN 收音机爱 好者资料库Cascad
5、e Model Twelve subwoofer 300 W Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotesNA 120vac/60HzYes108-132120VrmsNormal OperationEU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS requiredParameterSpecificationUnitQA Test LimitsConditionsNotesAmp SectionType (Class AB, D, other)D-
6、Load Impedance (speaker)4OhmsNominalZ-curve requiredRated Output Power300WattsRegulated 120 V lineTHD Rated Power1%22k filter, 50Hz300WTHD 1 Watt0.5%22k filter, 50HzDC OffsetundefinedmV-DC 15measured at 50 HzInput SensitivityLine Input260 mVmVrms300 W 50Hz1 input drivenSignal to NoiseSNR-A-Weighted1
7、00dBArelative to rated powerA-Weighting filterSNR-unweighted70dBrrelative to rated power22k filterSNR rel. 1W-unweighted60dBrrelative to 1W Output22k filterResidual Noise Floor2mVrmsVolume max, using RMS reading DMM/VOM (or A/P)Residual Noise Floor1mVrms(max)Volume max, w/ A/P Swept Bandpass Measure
8、ment (Line freq.+ harmonics)Input ImpedanceLine Input6.5 kohmsNominalActive FiltersLow Pass (fixed or variable)VARIABLE-Frequency50 - 150 HzSlope24dB/OctaveQButterworth -High Pass (HPF)FIXED-Frequency31HzSlope12dB/OctaveQ1.5 -Line Out (BUFFERED)STEREO- Unity GainFriend CircuitFIXED-Frequency60Hznotc
9、h filterSlope6dB/OctaveQ2.5 -Special filterRABOS-SwitchesMain Power ON/OFFYES-Typerocker-Located on amp plateTV-5Rabos ON/OFFYES-Typemini togle-Located on amp plateLine/Spkr Input Select SwitchNO-Type-Polarity SwitchYES-Off: 0; On: 180Typemini togle -Located on amp plateLimiter (yes/no)YEScompressor
10、 and limiterTHD at Max. Output Powerless than 2%Maximum Output PowerMaximum THD as a result of limiting.Output Level ControlVolume Control PotYES-gain control mounted on amp panelTaper (lin/log)log A taper- minimum settingno outputInput/Output ConfigurationLine InStereo-RCA phono jack, gold platedLF
11、E InYES-Shared with R Line In jackLine Outputs (L,R)YES- Buffered all-pass line level L & RModel Twelve Model Twelve Cascade Cascade 2ParameterSpecificationUnitQA Test LimitsConditionsNotesSignal Sensing (ATO)Auto-Turn-On (yes/no)YES-ATO Input Test Frequency100HzATO Input Threshold1mVtyp.LPF On, BOS
12、 OffATO Low Pass cutoff1kHz450ATO-LPF for noise immunityLPF On, BOS OffATO Turn-on time2s10Amp connected and AC on, then input signal applied ( 1 W output )Auto Mute / Turn-OFF Time10minutes 5 t 15Time before muting, after signal is removedPower on FeaturesPower on Delay timegreater than 2sec.AC Pow
13、er AppliedPower on LEDYES-Bi-color LED located on front of cabinetNormal On/Offgreen / redcolorATO mode onlyATO-colorActive: green; Standby: redTransients/PopsATO Transient5mV-peak Speaker OutputsTurn-on Transient30mV-peak Speaker OutputsAC Line cycled from OFF to ONTurn-off Transient30mV-peak Speak
14、er OutputsAC Line cycled from ON to OFFEfficiencyStand-by Input Power10Wattstyp. nom. line voltageAC Power Cons.1W12Wattstyp. nom. line voltagePower Cons.rated power473Wattstyp. nom. line voltageInput power measured is REAL Watts, not VAEfficiency63%typ. nom. line voltageProtectionShort Circuit Prot
15、ection YES-Direct short at outputThermal Protection YES- threshold 65 deg. C at panelDC Offset ProtectionYES-DC present at Speaker Out leadsRelay for driver/fire protectionLine Fuse Rating ( 120 V )3.15AmpsType ADL or MDL Fuse holder on inside surface of amp panelModel Twelve Model Twelve Cascade Ca
16、scade 34Model Twelve Model Twelve Cascade Cascade Line InLine Out150MaxLevelCrossoverHz50MinLFEInputPhaseNormalOffOnLFEGreen: OnRed: StandbyModel TwelvePower012345678BA9Cascade Model TwelveRear PanelCONTROLS ANDCONNECTIONSPower SwitchLine-Level OutputsLine-Level InputsPower IndicatorCrossover Adjust
17、mentSubwoofer Level (Volume) ControlNormal/LFE SelectorPhase SwitchBass Optimization Controls (see page 5)Bass Optimization System SelectorCenter-Frequency AdjustmentBass Optimization System Level AdjustmentBass Optimization System Bandwidth AdjustmentCascade 12 OM 9/21/05 5:03 PM Page 5Model Twelve
18、 Model Twelve Cascade Cascade 5Cascade Model TwelveCONNECTIONSIf you have a Dolby* Digital or DTSreceiver/processorwith a low-frequency-effects (LFE) output: Set Normal/LFE Switch to LFE.NOTE:In this case,you do not need to use a Y connector.Simplyconnect the LFE output on your receiver/processor to
19、 either the left or right input on the subwoofer.SUBWOOFER ORLFE OUTPUTLine InLine Out150MaxLevelCrossoverHz50MinLFEInputPhaseNormalOffOnLFEGreen:OnRed:StandbyModel TwelveThe Cascade Model Twelve alsoincludes a set of line outputs.Theseoutputs allow you to “daisy-chain”one Model Twelve to multiple M
20、odelTwelve subwoofers.Simply connectthe first subwoofer as describedabove and then run a subwoofercable from the line output(s) to theline input(s) on the next sub.NOTE:This line output is before theR.A.B.O.S.circuit.Each subwoofersR.A.B.O.S.controls must beindividually adjusted during theR.A.B.O.S.
21、setup.If your receiver/processor has subwoofer outputs for the left and right channels: Set Normal/LFE Switch to Normal.NOTE:Some receivers have a single subwoofer output (do notconfuse this with a single LFE output as described to the left).In that case,it is recommended that you use a Y connector
22、(notincluded) to maximize performance.Line InLine Out150MaxLevelCrossoverHz50MinLFEInputPhaseNormalOffOnLFEGreen:OnRed:StandbyModel TwelveSUBWOOFER ORLFE OUTPUTLine InLine OutLFEInputGreen: OnRed: StandbyModel TwelveLine InLine OutLFEInputGreen: OnRed: StandbyModel TwelveLine InLine OutLFEInputGreen
23、: OnRed: StandbyModel TwelveLine InLine OutLFEInputGreen: OnRed: StandbyModel TwelveORCascade 12 OM 9/21/05 5:03 PM Page 6Model Twelve Model Twelve Cascade Cascade 6Cascade Model TwelvePower OnPlug your subwoofersAC cord into a wall outlet.Do not use theoutlets on the back of the receiver.Initially
24、set the Subwoofer Level (Volume) Control to the “min”position.Turn on your sub by pressing the Power Switch on the rear panel.Auto On/StandbyWith the Power Switch in the ON position,the PowerIndicator LED will remain backlit in red or green to indicate the On/Standby mode of the subwoofer.RED = STAN
25、DBY (No signal detected,Amp Off)GREEN = ON (Signal detected,Amp On)The subwoofer will automatically enter the Standby mode afterapproximately 10 minutes when no signal is detected from yoursystem.The subwoofer will then power ON instantly when asignal is detected.During periods of normal use,the Pow
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