Infinity-12-sub-sm 维修电路原理图.pdf

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.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 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) Infinity 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Cascade 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-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-Weighted100dBArelative 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 Measurement (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-Frequency60Hznotch 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 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 platedLFE 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 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 Power 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 Speaker 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 Protection 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 Cascade 34Model Twelve Model Twelve Cascade Cascade Line InLine Out150MaxLevelCrossoverHz50MinLFEInputPhaseNormalOffOnLFEGreen: OnRed: StandbyModel TwelvePower012345678BA9Cascade Model TwelveRear PanelCONTROLS ANDCONNECTIONSPower SwitchLine-Level OutputsLine-Level InputsPower IndicatorCrossover AdjustmentSubwoofer 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 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 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 ModelTwelve 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.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 (notincluded) to maximize performance.Line InLine Out150MaxLevelCrossoverHz50MinLFEInputPhaseNormalOffOnLFEGreen:OnRed:StandbyModel TwelveSUBWOOFER ORLFE OUTPUTLine InLine OutLFEInputGreen: OnRed: StandbyModel TwelveLine InLine OutLFEInputGreen: OnRed: StandbyModel TwelveLine InLine OutLFEInputGreen: 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 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 = STANDBY (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 PowerSwitch can be left on.You may turn off the Power Switch for extended periods of nonoperation,e.g.,when you are away on vacation.Adjust GainTurn on your entire audio system and start a CD or movie soundtrack at a moderate level.Turn up the Subwoofer Level(Volume) Control about half way.If no sound emanates fromthe subwoofer,check the AC-line cord and input cables. Are theconnectors on the cables making proper contact? Is the AC plug connected to a “live”receptacle? Has the Power Switch been pressed to the “On”position? Once you have confirmed thatthe subwoofer is active,proceed by playing a CD,record orcassette.Use a selection that has ample bass information.Set the overall volume control of the preamplifier or stereo to acomfortable level. Adjust the Subwoofer Level (Volume) Control until you obtain a pleasing blend of bass.Bass response shouldnot overpower the room but rather be adjusted so there is aharmonious blend across the entire musical range.Many usershave a tendency to set the subwoofer volume too loud,adhering to the belief that a subwoofer is there to produce lotsof bass.This is not entirely true.A subwoofer is there to enhancebass,extending the response of the entire system so the basscan be felt as well as heard.However,overall balance must be maintained or the music will not sound natural.Anexperienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive.OPERATIONCrossover AdjustmentsNOTE: This control will have no effect if the Normal/LFE SelectorSwitch is set to “LFE.”If you have a Dolby Digital or DTSprocessor/receiver,the Crossover Frequency is set by theprocessor/receiver.Consult your owners manual to learn how to view or change this setting.The Crossover Adjustment Control determines the highestfrequency at which the subwoofer reproduces sounds.If your mainspeakers can comfortably reproduce some low-frequency sounds,set this control to a lower frequency setting, between 50Hzand 100Hz.This will concentrate the subwoofers efforts on theultradeep bass sounds required by todays films and music.If youare using smaller bookshelf speakers that do not extend to thelower bass frequencies,set the Crossover Adjustment Control toa higher setting,between 120Hz and 150Hz.Phase ControlThe Phase Switch determines whether the subwooferspeakers piston-like action moves in and out with the mainspeakers,0,or opposite the main speakers,180.Proper phaseadjustment depends on several variables such as room size,subwoofer placement and listener position.Adjust the phaseswitch to maximize bass output at the listening position.Cascade 12 OM 9/21/05 5:03 PM Page 7Model Twelve Model Twelve Cascade Cascade 7Model Twelve Model Twelve Cascade Cascade 8 Cascade Model Twelve TEST PROCEDURE The operation of the Cascade Model Twelve subwoofer, and the proper settings for the Room Adaptive Bass Optimization System, or R.A.B.O.S., is thoroughly covered in the Owners guide, part# 406-000-05338-E. For service purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully CW (Clockwise), or if the R.A.B.O.S. On/Off switch is OFF. The only other control of concern is the Main Level Control on the front panel, which operates like a traditional potentiometer. Equipment needed: Function/signal generator/sweep generator Integrated Amplifier Multimeter RCA cables; Speaker cables General Unit Function (UUT = Unit Under Test) Switch/Controls: MAIN LEVEL control full Counterclockwise (Min) CROSSOVER (Hz) Full Clockwise (150) R.A.B.O.S. On/Off switch OFF PHASE switch - either position (3) R.A.B.O.S. controls do not matter 1) From the signal generator, connect one line level (RCA) cable to the Line In jacks (L/R) on the UUT. Use a Y-cable from a mono source if necessary to connect to both inputs. 2) Turn on generator; adjust to 150mV, 50 Hz. 3) Plug AC power cord in UUT, turn power switch ON. 4) LED should be ON (faceplate). Turn up LEVEL control to full Clockwise (Max). 5) LED should be Green; Bass response should be heard and felt from woofer at bottom of cabinet. 6) Turn LEVEL control full Counterclockwise (Min). Turn power switch OFF. Sweep Function 1) Follow steps 1-5 above, using a sweep generator as a signal source adjust the generator to 100mV, 50 Hz. 2) Sweep generator from 20Hz to 300Hz. Listen for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, test woofer according to the instructions below. Driver Function 1) Remove woofer from the enclosure. Check DC resistance of woofer; it should be 3.4 10%, 2) Connect a pair of speaker cables to woofer terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 6.0V. 3) Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises. Model Twelve Model Twelve Cascade Cascade 9BLOCK DIAGRAMModel Twelve Model Twelve Cascade Cascade 10 MODEL12 Test Flow Chart yes no no yes yes no yes no yes no yes no yes no yes no no yes yes no 說明:以上推斷是在操作接線正確,測試 方法正確,儀器設備正常的前提下進行的. Start Dc voltage check Vcc,15V OK Check transformer C168,C169,D123, D124,C170 Power on check LED red &green OK Check vol module & connector cable& 15V.etc Check THD output power, noise OK Check pre board & power board , Vcc,15V ect Test frequency Response OK Check U102,uR133, C121,R135,C122.ect Test input sensitivity OK Check U101,R117, R112,R114 etc Test protection OKCheck U107.R237 15Vcc etc Test limiter circuit OKCheck U106.Q107ect Auto off Function Hi pot test OKCheck U103.Q101. Q102.C131.R142;Ac cord, Transformer. OKListening test OKThe Amp assy ok END Test phase sw,low pass sw rabos vr Check sw103,102, R158,163,177 ect Model Twelve Model Twelve Cascade Cascade 11Cascade Model Twelve Electrical Parts List 120vPart NumberDescriptionQtyReference DesignatorMAIN/POWER SUPPY PCBResistors110-16102j26-e CARBON RESISTOR 1K 1/6W 5% CF 26mm (RoHS) 3R210,R239,R264110-16103j26-e CARBON RESISTOR 10K 1/6W 5% CF 26mm (RoHS) 9R216,R227,R229,R230,R231,R232,R233,R260,R261110-16153j26-e CARBON RESISTOR 15K 1/6W 5% CF 26mm (RoHS) 2R247,R249110-16182j26-e CARBON RESISTOR 1.8K 1/6W 5% CF 26mm (RoHS) 1R248110-16222j26-e CARBON RESISTOR 2.2K 1/6W 5% CF 26mm (RoHS) 2R242,R245110-16223j26-e CARBON RESISTOR 22K 1/6W 5% CF 26mm (RoHS) 3R218,R220,R223110-16274j26-e CARBON RESISTOR 270K 1/6W 5% CF 26mm (RoHS) 1R240110-16333j26-e CARBON RESISTOR 33K 1/6W 5% CF 26mm (RoHS) 1R211110-16391j26-e CARBON RESISTOR 390 1/6W CF 26mm (RoHS) 2R243,R246110-16472j26-e CARBON RESISTOR 4.7K 1/6W 5% CF 26mm (RoHS) 4R213,R217,R219,R222110-16473j26-e CARBON RESISTOR 47K 1/6W 5% CF 26mm (RoHS) 1R221110-16683j26-e CARBON RESISTOR 68K 1/6W 5% CF 26mm (RoHS) 1R212112-14101j26-e FUSE RESISTOR 1/4W 100ohm 5%(RoHS) 2R241,R244116-141r00j26x-e MTL FILM RESISTOR 1.00 1/4W 5% MO 26mm (RoHS) 2R255,R256116-161002f26-e MTL FILM RESISTOR 10K 1/6W 1% MF 26mm (RoHS) 2R234,R235116-161301f26-e MTL FILM RESISTOR1.30K 1/6W MF 26mm (RoHS) 3R226,R228,R236116-161692f26-e MTL FILM RESISTOR16.9K 1/6W MF 26mm (RoHS) 1R214116-162001f26-e MTL FILM RESISTOR 2.00K 1/6W 1% MF 26mm (RoHS) 1R215116-162492f26-e MTL FILM RESISTOR 24.9K 1/6W 1% MF 26mm (RoHS) 2R257,R258116-166813f26-e MTL FILM RESISTOR 681K 1/6W 1% MF 26mm (RoHS) 1R262110-12621j15-e CARBON RESISTOR 620 1/2W 5% 15mm(RoHS) 1R238110-20152j20-e CARBON RESISTOR 1.5K 2W 5% CF 20mm KINK(RoHS) 1R208113-500r1j10-e CEMENT RESISTOR 0.1