infinity-PS12-sub-sm 维修电路原理图.pdf

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1、 PS-10 PS-12PS-10 PS-12 PS Series Powered Subwoofers SERVICE MANUAL Infinity Systems Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 10/2004 RadioFans.CN 收音机爱 好者资料库 CONTENTS BASIC SPECIFICATIONS . . . . . . . . . . . . . . . . 1 PS-10 DETAILED SPECIFICATIONS . . . . . . . . . . . .

2、 . . . . . . . . . . . . 2 PS-12 DETAILED SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . 4 CONTROLS & CONNECTIONS . . . . . . . . . . . . . . . 6 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PS-10 BLOCK DIAGRAM. . . . . . . . . . 9 PS-12 BLOCK DIAGRA

3、M. . . . . . . . . . 10 PS-10/12 TEST SET-UP AND PROCEDURE.11 TECH TIP INFTT2003-02. . . . . . . . . . 12 PS-10 EXPLODED VIEW . . . . . . . . . . . . . . . 13 PS-12 EXPLODED VIEW . . . . . . . . . . . . . . . 14 PS-10 PACKING. . . . . . . . . . . . . . . . . . . . . . . .15 PS-12 PACKING. . . . . .

4、. . . . . . . . . . . . . . . . . .16 PS-10 ELECTRICAL PARTS LIST . . . . . . . . . . . . 17 PS-12 ELECTRICAL PARTS LIST . . . . . . . . . . . 21 PCB DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . 25 IC TRANSISTOR PINOUTS . . . . . . . . . . . . . 28 PS-10 SCHEMATIC DIAGRAMS . . . . . .

5、 . . . . . . . . . . . .29 PS-12 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . .31 SPECIFICATIONS PS-10 PS-12 Frequency Response: 27Hz 150Hz (3dB) 25Hz 150Hz (3dB) Maximum Amplifier Output: 250 watts RMS 300 watts RMS (20Hz 150Hz with no more than 0.1% THD) Crossover Frequencies: 50Hz 150Hz,

6、50Hz 150Hz 24dB/octave, continuously variable Driver: 10 (254mm) MMD 12 (305mm) MMD Dimensions (H x W x D): 14 3/4 x 12-1/2 x 16 16-1/2 x 14-3/8 x 17-1/2 (375mm x 318mm x 406mm) (419mm x 365mm x 445mm) Weight: 38 lb (17.3kg) 45 lb (20.5kg) Infinity continually strives to update and improve existing

7、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. PS-10/PS-12 PS-10/PS-12 1RadioFans.CN 收音机爱 好者资料库PS-10 Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotesUS 120vac/

8、60HzYes108-132120VrmsNormal OperationEU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS requiredParameterSpecificationUnitQA Test LimitsConditionsNotesAmp SectionType (Class AB, D, other)Dn/an/aLoad Impedance (speaker)5.6Ohmsn/aNominalRated Output Power (120VAC)150Watts138Domestic version only

9、 120 VAC-60 HzRated Output Power (230VAC)150Watts128EU Version only 230 VAC-50 HzAVG RMS Dynamic Power250Watts225Average RMS power, 3/20 Cycles 50 Hz, Driven 6dB above its input sensitivity sensitivityTHD Rated Power0.5%122K filter145 WattsTHD 1 Watt0.1%0.522K filterDC Offset10mV-DC30Amplifier outpu

10、tDamping factor50DF20Measured at amplifier board Measured at the amplifier board. 150 Watts 50 Hz, THD must be less tan 0.1%Input SensitivityInput Frequency35Hz35Nominal Freq.L&R300mVrms2dBTo 150 Watts, Ap Zo=600 OhmsSingle input drivenL or R input300mVrms2dBTo 150 Watts , Ap Zo=600 OhmsSingle input

11、 driven, LFE switch ONSpeaker/Hi Level Input2.6Vrms2dBTo 150 WattsSingle input drivenSignal to NoiseSNR-A-Weighted90dBA85relative to rated powerA-Weighting filterSNR-unweighted85dBr75relative to rated power22K filterSNR rel. 1W-unweighted65dBr60relative to 1W Output22K filterResidual Noise Floor1mVr

12、ms1.5Volume max, using RMS reading DMM/VOM (or A/P) BW=20 Khz.Line level inputs must be terminated using 1KOHMResidual Noise Floor1.5mVrms(max)1.5Volume max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) (BW=20 Khz)Line level inputs must be terminated using 1KOHMInput ImpedanceLine Input

13、 (L, R,LFE)10Kohmsn/aNominalSpeaker/Hi Level Input 4.7Kohmsn/aNominalFiltersLP filter 4th order fixed50-150 Hz 102nd Order variable and 2nd order fix 2nd order variable + 2nd order fix-24 db/OctaveHP Filter 2nd orderFixedF=32 Hz, Q=0.95LFE Low pass 2nd order200LP T 50DF20Measured at amplifier board

14、Measured at the amplifier board. 140 Watts 50 Hz, THD must be less than 0.1%Input SensitivityInput Frequency35Hz35Nominal Freq.L&R250mVrms2dBTo 150 Watts, Ap Zo=600 OhmsSingle input drivenL or R input250mVrms2dBTo 150 Watts , Ap Zo=600 OhmsSingle input driven, LFE switch ONSpeaker/Hi Level Input2.3V

15、rms2dBTo 150 WattsSingle input drivenSignal to NoiseSNR-A-Weighted90dBA85relative to rated powerA-Weighting filterSNR-unweighted85dBr75relative to rated power22K filterSNR rel. 1W-unweighted65dBr60relative to 1W Output22K filterResidual Noise Floor1mVrms1.5Volume max, using RMS reading DMM/VOM (or A

16、/P) BW=20 Khz.Line level inputs must be terminated using 1KOHMResidual Noise Floor1.5 mVrms(max)1.5Volume max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) (BW=20 Khz)Line level inputs must be terminated using 1KOHMInput ImpedanceLine Input (L, R,LFE)10Kohmsn/aNominalSpeaker/Hi Level In

17、put 4.7Kohmsn/aNominalFiltersLP filter 4th order fixed50-150 Hz 102nd Order variable and 2nd order fix 2nd order variable + 2nd order fix-24 db/OctaveHP Filter 2nd orderFixedF=29 Hz, Q=1.5LFE Low pass 2nd order200LP T 18 MinutesPower on Delay time3sec.4AC Power AppliedPS-10/PS-12 PS-10/PS-12 4Parame

18、terSpecificationUnitQA Test LimitsConditionsNotesTransients/PopsATO Transient5mV-peakn/a Speaker OutputsTurn-on Transient50mV-peak2V-pk-pk Speaker OutputsAC Line cycled from OFF to ONTurn-off Transient50mV-peak2V-pk-pk Speaker OutputsAC Line cycled from ON to OFFEfficiencyEfficiency65%65Nominal Line

19、 voltage 120 VACStand-by Input Power18Watts20 nom. line voltageMaximum allowable input power under nominal Input voltage and frequency, HOT or COLD operation.Power Cons. rated power230Watts240 nom. line voltage150 Watts into 5.6 Ohms nominal line voltageProtectionsShort Circuit Protection YESfunctio

20、nal Direct short at outputAmplifier should resume operation after short circuit condition removal Thermal Protection YESfunctional1/8 max unclipped Power at 1.06 times the input voltageTemperature rise in accessible metal parts should not exceed 35K rise for domestic version or 30K rise for European

21、 versions (refer to requirements sheet).DC Offset ProtectionYES-DC present at Speaker Out leadsDesign must insure no Offset at the speaker output under any operating condition including abnormal operationLine Fuse RatingUSA-Domestic 2Amps2Type-T or Slo Blo-250 VInternal fuse with UL/SEMKO rated hold

22、erEU (230v)1.25Amps1.25Type-T or Slo Blo-250 V, Low Breaking capacityInternal fuse with UL/SEMKO rated holder4. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE. 5.- EURPOEAN VERSION MUST BE PROVIDED WITH PLASTIC PLUGS ON THE BINDING POST CONNECTORSPS-10/PS-12 PS-10/PS-12 5PS-10/PS-12Rear PanelC

23、ONTROLS ANDCONNECTIONSCAUTIONRISK OF ELECTRIC SHOCKDO NOT OPENCROSSOVERFREQUENCYLEVELLINE LEVEL INPHASEMinMaxLRL RFor LFE use L or RGreen: OnRed: Stand-By+ 50Hz080Hz150HzPOWERONLFE NORMAL180HIGHLEVELIN 120V60HzOFFWARNING: TO REDUCE THE RISK OF FIRE OR ELECTRICAL ?SHOCK DO NOT EXPOSE THIS APPLIANCE T

24、O RAIN OR MOISTURE.AVERTISSEMENT: POUR PRVENIR LES RISQUES DINCENDIE OU DE CHOC ?LECTRIQUE, VITER DEXPOSER CET APPAREIL A LA PLUIE OU A LHUMIDIT.NRTL/C?CSA 22.2?UL1492Subwoofer-Level Control LFE/Normal SelectorPhase SwitchCrossover AdjustmentLine-Level/LFE Input Speaker-Level Inputs Power SwitchStat

25、us LEDPS-10/PS-12 PS-10/PS-12 6PS-10/PS-12SYSTEMCONNECTIONSIf your receiver/processor doesnot contain a Dolby Digital or DTS processor but has subwoofer outputs:Set line-level/LFE switch to“Normal.”NOTE: If your receiver/processorhas only one sub out,you may useeither the L or R input.If you have a

26、Dolby* Digital orDTSreceiver/processor with alow-frequency-effects (LFE) orsubwoofer output:CROSSOVERFREQUENCYLEVELLINE LEVEL INPHASEMinMaxLRL RFor LFE use L or RLFE NORMALHIGHLEVELIN50Hz0180150HzRECEIVER/AMPLIFIERFront Speaker Output80HzGreen: OnRed: Stand-By+ CROSSOVERFREQUENCYLEVELLINE LEVEL INPH

27、ASEMinMaxLRL RFor LFE use L or RLFE NORMALHIGHLEVELIN+ 50Hz0180150HzRECEIVER/PROCESSOR80Hz L R Green: OnRed: Stand-ByCROSSOVERFREQUENCYLEVELLINE LEVEL INPHASEMinMaxL RFor LFE use L or RLFE NORMAL50Hz0180150HzSUBWOOFER ORLFE OUTPUT80HzGreen: OnRed: Stand-BySet LFE/Normal switch to “LFE.”LOOSEN TERMIN

28、ALSINSERT BARE END; ?TIGHTEN TERMINALS1.2.BLACK = ?NO STRIPE = ?STRIPE = +RED = +This figure shows how to connect bare wires to the terminals.If your receiver/processor does not havesubwoofer outputs for the left and rightchannels or an LFE output,connectspeaker wire from your receiver/amplifierto y

29、our speakers and subwoofer usingtwo sets of speaker wire:PS-10/PS-12 PS-10/PS-12 7PS-10/PS-12OPERATIONPower OnPlug your subwoofersAC cord into a wall outlet.Do not use the outlets on theback of the receiver.Initially set the Subwoofer-Level Control to the “min”position.Turn on your sub by pressing t

30、he Power Switch on the rear panel.Turn on your entire audio system and start a CD or movie soundtrack at amoderate level.Auto On/Stand-ByWith the Power Switch in the ON position,the Status LED on the back panel will remain lit in red or green to indicate the On/Standby mode of the subwoofer.RED = ST

31、ANDBY (No signal detected,Amp Off)GREEN = ON (Signal detected,Amp On)The subwoofer will automatically enter the Standby mode after approxi-mately 10 minutes when no signal is detected from your system.The sub-woofer will then power ON instantly when a signal is detected.Duringperiods of normal use,t

32、he Power Switch can be left on.You may turnoff the Power Switch for extended periods of nonoperation,e.g.,whenyou are away on vacation.Adjust GainTurn your Subwoofer-Level Control up to the halfway position.If nosound emanates from the subwoofer,check the AC-line cord and inputcables.Are the connect

33、ors 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 that the subwoofer is active,proceed by playing a CD,record or cassette.Use a selection that has ample bass information.Set the over

34、all volume control of the preamplifier or stereo to a comfort-able level.Adjust the Subwoofer-Level Control until you obtain a pleas-ing blend of bass.Bass response should not overpower the room butrather be adjusted so there is a harmonious blend across the entire musi-cal range.Many users have a t

35、endency to set the subwoofer volume tooloud,adhering to the belief that a subwoofer is there to produce lots ofbass.This is not entirely true.A subwoofer is there to enhance bass,extending the response of the entire system so the bass can be felt aswell as heard.However,overall balance must be maint

36、ained or the musicwill not sound natural.An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but neverobtrusive.Phase ControlThe Phase Switch determines whether the subwoofer speakers piston-like action moves in and out with the main speakers,0

37、,or opposite themain speakers,180.Proper phase adjustment depends on several variables such as room size,subwoofer placement and listener position.Adjust the phase switch to maximize bass output at the listening position.Crossover AdjustmentThe Crossover Adjustment Control determines the highest fre

38、quency atwhich the subwoofer reproduces sounds.If your main speakers can comfort-ably reproduce some low-frequency sounds, set this control to a lowerfrequency setting, between 50Hz and 100Hz.This will concentrate thesubwoofers efforts on the ultradeep bass sounds required by todaysfilms and music.I

39、f you are using smaller bookshelf speakers that do not extend to the lower bass frequencies,set the Crossover Adjustmentcontrol to a higher setting,between 120Hz and 150Hz.NOTE: This control will have no effect if the LFE/Normal Selector is setto LFE.If you have a Dolby Digital or DTS processor/rece

40、iver,the Low-PassFrequency is set by the processor/receiver.Consult your owners manual tolearn how to view or change this setting.MAINTENANCE ANDSERVICEThe enclosure may be cleaned using a soft cloth to remove fingerprintsor to wipe off dust.The grille may be gently vacuumed.Stains may be removed wi

41、th anaerosol cleaner,following its instructions.Do not use any solvents on the grille.All wiring connections should be inspected and cleaned or remade peri-odically.The frequency of maintenance depends on the metals involved inthe connections,atmospheric conditions,and other factors,but once peryear

42、 is the minimum.If a problem occurs,make sure that all connections are properly madeand clean.If a problem exists in one loudspeaker,reverse the connectionwires to the left and right system.If the problem remains in the samespeaker,then the fault is with the loudspeaker.If the problem appears inthe

43、opposite speaker,the cause is in another component or cable.In theevent that your subwoofer ever needs service,contact your local Infinitydealer or Infinity directly at 1.516.674.4INF or for a service center near you.PS-10/PS-12 PS-10/PS-12 8PS-10 BLOCK DIAGRAMPS-10/PS-12 PS-10/PS-12 9PS-12 BLOCK DI

44、AGRAMPS-10/PS-12 PS-10/PS-12 10 PS-10/12 Test Set Up and Procedure SYSTEM AURAL SWEEP TEST Equipment needed: Function/signal generator/sweep generator Integrated Amplifier Multimeter Speaker cables General Unit Function (UUT = Unit Under Test) Switches/knobs on the amplifier faceplate: LFE/Normal to

45、 Normal Low Pass Frequency Adjust full CW (150Hz) Phase switch either position 1. From the signal generator, Connect both right and left line level inputs (RCA) to signal generator and UUT. Use Y-cable if necessary from mono source. 2. On the amplifier, turn the LEVEL control full Counterclockwise (

46、Min). 3. Turn on generator, adjust to 100mV, 50 Hz. 4. Plug in UUT; turn the power switch ON. Turn LEVEL control full Clockwise (Max). 5. LED should now be Green; immediate bass response should be heard and felt from rear port tube opening. 6. Turn off generator, turn LEVEL control fully Countercloc

47、kwise (Min), disconnect RCA cable. 7. Connect one pair of speaker cables to one set of Speaker Level input terminals on UUT. Cables should be connected to an integrated amplifier fed by the signal generator. 8. Turn on generator and adjust so that speaker level input at the amplifier is 1.3V, 50 Hz.

48、 Turn LEVEL control full Clockwise (Max). 9. Green LED should light; immediate bass response should be heard and felt from the port tube opening. Sweep Function 1. Follow steps 7-10 above, using a sweep generator as a signal source. 2. Sweep generator from 20Hz to 1kHz. Listen to the cabinet and dri

49、vers for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, remove woofer and test. Driver Function (Woofer) 1. Remove woofer from cabinet; detach + and - wire clips. 2. Check DC resistance of woofer; it should be 3.4 ohms10%. 3. Connect a pair of speaker cables to dri

50、ver 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 5.0V. 4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises. 11PS-10/PS-12 PS-10/PS-12 TECH