Infinity-PS28-sub-sm 维修电路原理图.pdf

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1、 PS Series PS Series PS28 Subwoofer PS28 Subwoofer SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 3/2007 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

2、/PARTS LIST .8 TEST SET UP AND PROCEDURE.9 BLOCK DIAGRAM.10 TROUBLESHOOTING FLOW CHART.12 ELECTRICAL PARTS LIST (120v) .13 PCB DRAWINGS.17 SEMICONDUCTOR PINOUTS.21 SCHEMATICS (120v).22 Basic Specifications PS28 Powered Subwoofer Frequency Response: 35Hz 150Hz (3dB) Maximum Amplifier Output: 150 Watt

3、s RMS (20Hz 150Hz, with 0.1% THD) 300 Watts Peak Crossover Frequency: 50Hz 150Hz, 24dB/octave, continuously variable Driver: 8 (200mm) Dimensions (H x W x D): 17-7/8 x 10-5/8 x 16-1/2 (454mm x 270mm x 419mm) Weight: 31.7 lb (14.4kg) Infinity continually strives to update and improve existing product

4、s, 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 series PS28 subwoofer RadioFans.CN 收音机爱 好者资料库INFINITY PRIMUS PS28 150W Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineUnitNotesU

5、S 120VAC/60HzYes108-132VrmsNormal OperationEurope 220-240VAC, 50-60HzYes220-230VrmsNormal OperationParameterSpecificationUnitQA Test LimitsConditionsNotesAmp SectionType (Class AB, D, other)AB ABn/a120V modelExternal Sink required for Class ABType (Class AB, D, other)GGn/a230V ModelRated Load Impeda

6、nce 4Ohmsn/aNominalImpedance used for electrical measurementsSystem average impedance8.79Ohmsn/aAverage impedance from 10 to 500HzVoice coil DCR4.35Ohmsn/aReferenceRated Output Power100Watts95Single input drivenTHD Rated Power0.5%122K filterTHD 1 Watt0.1%0.322K filterDC Offset10mV-DC50 Speaker Outpu

7、tDamping factor 10040Measured at speaker terminals, Output power 90 Watts Dynamic power RMS125WattsReferenceAVG Power over the first 4 consecutive peaks, when tested with a burst siganl 3/20 at 50 HzHighest RMS value 152WattsReferenceInput SensitivityInput Frequency50Hz50Nominal Freq.Line Input (L&R

8、)16.5mVrms2dBTo 1WSingle input driven, AP Zo=600 OhmsLFE Input11.7mVrms2dBTo 1WLFE input driven only, AP Zo=600 OhmsSystem Gain (Line input)41dB1dBG=118Single input driven, AP Zo=600 OhmsSystem gain (LFE input)44dB1dBG=165LFE input driven only, AP Zo=600 OhmsSignal to NoiseSNR-A-Weighted100dBA85rel.

9、 to rated powerA-Weighting filterSNR-unweighted85dBr80rel. to rated power22K filterSNR 1W-unweighted65dBr60rel. to 1W Output22K filterResidual Noise Floor1mVrms(max)1.5Volume max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)Input ImpedanceLine input L&R , LFE10K ohmsn/aNominalFiltersLow

10、 Pass (fixed or variable)Variable-2dBCrossover range 50-150 HzSubsonic filter (HPF)Hz2dBFixed Limiter (yes/no)YES-FunctionalTHD at Max. Output Power T 15Power on Delay time3sec.Functional AC Power AppliedTransients/PopsATO Transient5mV-peak10 Speaker OutputsTurn-on Transient50mV-peak100 Speaker Outp

11、utsAC Line cycled from OFF to ON PS series PS28 subwoofer 2ParameterSpecificationUnitQA Test LimitsConditionsNotesTurn-off Transient50mV-peak100 Speaker OutputsAC Line cycled from ON to OFFEfficiencyStand-by Input Power12Watts15 nom. line voltageMaximum allowable input power under nominal Input volt

12、age and frequency, HOT or COLD operation.Power Cons.rated power195Watts210 nom. line voltage100 Watts 4 Ohms nominal line voltageProtectionShort Circuit Protection YES-Functional Direct short at outputThermal Protection 65 deg. C-Functional 1/8 max unclipped Power Temperature rise should not exceed

13、35K riseDC Offset ProtectionYES-Functional DC present at Speaker Out leadsRelay or crowbar (for driver/fire protection)Line Fuse RatingExternal fuse with UL/SEMKO rated holder120 VAC2.5AmpsType-T or Slo Blo230 VAC1.25AmpsType-T, Low breaking capacity PS series PS28 subwoofer 3 PS series PS28 subwoof

14、er 4PS28 (120V)Rear PanelCONTROLS ANDCONNECTIONSSubwoofer-Level Control Crossover AdjustmentPhase SwitchLFE InputLine-Level Inputs Power SwitchFUSET 2.5A L 250VTYPEAC120V60HZ200 WattsPrimus PS28 (120V) OM 10/2/06 10:24 AM Page 4 PS series PS28 subwoofer 5PS28 (120V)If you have a DolbyDigital or DTSr

15、eceiver/processor with a low-frequencyeffects (LFE) or subwoofer output:SUBWOOFER ORLFE OUTPUTIf your receiver/processor does not contain a Dolby Digital or DTSprocessor but has a subwoofer output:NOTE: Some receivers have onesubwoofer output.In that case,it isrecommended that you use a Y connector

16、(not included) to maximize performance.RECEIVER/PROCESSORL RSUBWOOFERCONNECTIONSCHOOSE THESUBWOOFERCONNECTIONTHATISMOSTSUITABLE FORYOURRECEIVER/PROCESSORPrimus PS28 (120V) OM 10/2/06 10:24 AM Page 5 PS series PS28 subwoofer 6OPERATIONPower OnPlug your subwoofersAC cord into a wall outlet.Do not use

17、theoutlets on the back of the receiver.Initially set the Subwoofer-Level Control to the “min”position.Turn on your sub by pressing the Power Switch on the rearpanel.Turn on your entire audio system and start a CD or moviesoundtrack at a moderate level.Auto On/StandbyWith the Power Switch in the ON p

18、osition,the LED on therear panel will remain lit in red or green to indicate theOn/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 detect

19、ed 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 LevelTurn your Subwoofer-Level Control u

20、p to the “5”position(halfway).If no sound emanates from the subwoofer,check the AC-line cord and input cables.Are the connectors on the cablesmaking 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

21、 subwoofer is active,proceed by playing a CD,record or cassette.Use a selection thathas ample bass information.Set the overall volume control of the preamplifier or stereo to acomfortable level. Adjust the Subwoofer-Level Control untilyou obtain a pleasing blend of bass.Bass response should notoverp

22、ower the room but rather be adjusted so there is aharmonious blend across the entire musical range.Many users have 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,ext

23、ending 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 itsimpact on bass response is always there but never obtrusive.Phase ControlT

24、he 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 ba

25、ss output at the listening position.Crossover AdjustmentsThe 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 1

26、00Hz.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.N NO OT TE E: Th

27、is control will have no effect if the LFE Input is used.If you have a Dolby Digital or DTS processor/receiver,the Low-PassFrequency is set by the processor/receiver.Consult your ownersmanual to learn how to view or change this setting.MAINTENANCE ANDSERVICEThe enclosure may be cleaned using a soft c

28、loth to removefingerprints or to wipe off dust.The grille may be gently vacuumed.Stains may be removed withan aerosol cleaner,following its instructions.Do not use anysolvents on the grille.All wiring connections should be inspected and cleaned orremade periodically.The frequency of maintenance depe

29、nds onthe metals involved in the connections,atmospheric conditions,and other factors,but once per year is the minimum.In the event that your subwoofer ever needs service,contact your local Infinity dealer or distributor or for a service center near you.Primus PS28 (120V) OM 10/2/06 10:24 AM Page 6

30、PS series PS28 subwoofer 78 PS series PS28 subwoofer PS28 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 facepla

31、te: 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) not the LFE jack - to signal generator and UUT. Use Y-cable if necessary from mono source. 2. On the amplifier, turn the LEVEL control full Cou

32、nterclockwise (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. Sweep Function 1. Follow steps 1-5 above, us

33、ing a sweep generator as a signal source. 2. Sweep generator from 20Hz to 1kHz. Listen to the cabinet and drivers 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

34、clips. 2. Check DC resistance of woofer; it should be 4.4 ohms10%. 3. Connect a pair of speaker cables to driver 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

35、 to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises. PS series PS28 subwoofer 9 PS series PS28 subwoofer 10 PS series PS28 subwoofer 11 PS28 Troubleshooting Flow Chart no yes yes yes no yes yes LED red LED light green yes yes no yes yes no no yes yes yes no no yes yes yes no

36、 yes yes AMP no signal out DC voltage check Vcc Check+/-15VDC LED light green or red Check Fuse,Transformer, D110, etc Check RY101,D102,Q113,Q114 etc Check Q107,Q108,Q105, Q106,Q103,Q104,U101,etc Check ,+VCC& -VCC DC voltage Check U101,Q115,Q116,R138 etc Check Q117,118,119,D109 etc Check,Q206,Q207,U

37、203 etc Check U202 pin14 signal Check U201 pin14 signal Test R121,R122 signal Check P102 signal Amp assy is OK, Finish CheckU201,U202,VR201 VR202. etc Check J123,J124 etc Check limiter board C304 Check U301,R343,R344 ,C340,Q301,Q302, etc Set R138 to R140S Voltage is 0.51VDC PS series PS28 subwoofer

38、12PS 28 (120v) Electrical Parts ListPart NumberDescriptionQtyReference DesignatorPREAMP PCBResistors110-14122j26-e Resistor 1.2K 1/4W 5% CF 26mm (RoHS)1R270110-16102j26-e Resistor 1K 1/6W 5% CF 26mm (RoHS)5R213,R214,R215,R254,R253110-16103j26-e Resistor 10K 1/6W 5% CF 26mm (RoHS)12R212,R216,R217,R22

39、0,R221,R222,R225,R226,R228, R232,R235,R240110-16104j26-e Resistor 100K 1/6W 5% CF 26mm (RoHS)2R231,R266110-16105j26-e Resistor 1M 1/6W 5% CF 26mm (RoHS)2R259110-16123j26-e Resistor 12K 1/6W 5% CF 26mm (RoHS)1R227110-16183j26-e Resistor 18K 1/6W 5% CF 26mm (RoHS)1R262110-16205j26-e Resistor 2M 1/6W 5

40、% CF 26mm (RoHS)1R257110-16223j26-e Resistor 22K 1/6W 5% CF 26mm (RoHS)4R238,R250,R255,R233110-16224j26-e Resistor 220K 1/6W 5% CF 26mm (RoHS)1R251110-16273j26-e Resistor 27K 1/6W 5% CF 26mm (RoHS)1R237110-16333j26-e Resistor 33K 1/6W 5% CF 26mm (RoHS)1R249110-16472j26-e Resistor 4.7K 1/6W 5% CF 26m

41、m (RoHS)4R200,R207,R258,R260110-16473j26-e Resistor 47K 1/6W 5% CF 26mm (RoHS)1R219110-16474j26-e Resistor 470K 1/6W 5% CF 26mm (RoHS)1R252110-16512j26-e Resistor 5.1K 1/6W 5% CF 26mm (RoHS)3R211,R229,R230110-16562j26-e Resistor 5.6K 1/6W 5% CF 26mm (RoHS)1R224116-164531f26-e metal filmResistor 4.53

42、K 1/6W 1% MF26mm (RoHS)1R223116-164991f26-e metal filmResistor 4.99K 1/6W 1% MF26mm (RoHS)1R234115-h203b208-e horizon variable Resistor B20K (RoHS) CROSSOVER1VR202,115-h503a104-e horizon variable Resistor D16 50K/1 A (RoHS) LEVEL1VR201,Capacitors129-a224j633-e metalize CAP. 0.22uF 63V 5% MSC (RoHS)1

43、C218129-a564j633-e metalize CAP. 0.56uF 63V 5% (RoHS)1C216130-2b221k503-e disc capacitor 220P 50V 10% (RoHS) 9C207,C208,C210,C211,C212,C214,C220,C230,C249130-3f104z503-e disc capacitor 0.1U 50V +80/-20% (RoHS)7C232,C242,C244,C245,C246,C252,C254130-ch220k503-e disc capacitor 22PF CH 50V10% (RoHS)1C22

44、9130-2b220k503-edisc capacitor22P 50V +/-10% (RoHS) 1C229132-103j503-e Mylar capacitor 0.01uF 50V 5% (RoHS)2C223,C224132-104j503-e Mylar capacitor 0.1U 50V 5% (RoHS) 2C215,C217135-3105m50-e electrolytic CAP. 1U 50V 20% (RoHS)1C228135-3106m50-e electrolytic CAP. 10uF 50V 20% (RoHS)7C206,C213,C231,C24

45、1,C243,C251,C253135-3107m16-e electrolytic CAP. 100uF 16V 20% (RoHS)2C233,C234135-3225m50-e electrolytic CAP. 2.2U 50V 20% (RoHS)1C219135-3226m50-e electrolytic CAP. 22U 50V 20% (RoHS) 1C225129-a474j633-e metalize capacitor 0.47U 63V 5% MSC (RoHS)2C221,C222,Semiconductors192-027c1815gr-e transistor

46、2SC1815GR TOSHIBA (RoHS) NPN2Q206,Q207197-031n4148-e diode 100mA 75V SIGNAL 1N4148ROHM (RoHS)7D201,D202,D207,D208,D211,D212,D214199-15000515-e zener diode 5.1V 1/2W 52mm (RoHS) 1D213190-06m4558d-e IC OPA 4558 DUAL OP-AMP2U101,U203,190-16tl074cn-e I .C TL074cm st QUAD OP-AMP2U201,U202,195-10204hgw-e

47、double colors LED 204HGW 3(RoHS)1LED1Miscellaneous162-50259201-e WIRE ASSY 2 PIN 250mm white/red(RoHS)1TO LED1,174-0rca326p-e JACK RCA-326 (RoHS)1JK202,180-tms7210v-e SWITCH SLIDE 6PIN MS7210V(RoHS) PHASE1SW301,JUMPER WIRE 26mm (RoHS)30ALL J,D215,D21613 PS series PS28 subwoofer Part NumberDescriptio

48、nQtyReference DesignatorPOWER/MAIN PCBResistors110-14472j26-e Resistor 4.7K 1/4W 5% CF 26mm (RoHS)2R147,R150110-14681j26-e Resistor 680 1/4W 5% CF 26mm (RoHS)2R148,R151110-16101j26-e Resistor 100 1/6W 5% CF 26mm (RoHS)1R120110-16102j26-e Resistor 1K 1/6W 5% CF 26mm (RoHS)1R124110-16103j26-e Resistor

49、 10K 1/6W 5% CF 26mm (RoHS)1R134110-16105j26-e Resistor 1M 1/6W 5% CF 26mm (RoHS)1R143110-16123j26-e Resistor 12K 1/6W 5% CF 26mm (RoHS)2R135,R139110-16152j26-e Resistor 1.5K 1/6W 5% CF 26mm (RoHS)6R103,R123,R136,R137,R141,R142110-16153j26-e Resistor 15K 1/6W 5% CF 26mm (RoHS)4R118,R145,R152,R154110

50、-16154j26-e Resistor 150K 1/6W 5% CF 26mm (RoHS)1R131110-16181j26-e Resistor 180 1/6W 5% CF 26mm (RoHS)2R111,R114110-16182j26-e Resistor 1.8K 1/6W 5% CF 26mm (RoHS)1R153110-16223j26-e Resistor 22K 1/6W 5% CF 26mm (RoHS)3R128,R129,R133110-16332j26-e Resistor 3.3K 1/6W 5% CF 26mm (RoHS)3R106,R107,R144