Infinity-PS212-sub-sm维修电路原理图.pdf
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1、 PS Series PS Series PS212 Subwoofer PS212 Subwoofer SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev0 12/2006 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 V
2、IEW/PARTS LIST .8 TEST SET UP AND PROCEDURE.9 BLOCK DIAGRAM.10 TROUBLESHOOTING FLOW CHART.12 ELECTRICAL PARTS LIST (120v) .13 PCB DRAWINGS.18 SEMICONDUCTOR PINOUTS.22 SCHEMATICS (120v).23 Basic Specifications PS212 Powered Subwoofer Frequency Response: 25Hz 150Hz (3dB) Maximum Amplifier Output: 400
3、Watts RMS; 700 Watts Peak (20Hz 150Hz with no more than 0.1% THD) Crossover Frequencies: 50Hz 150Hz, 24dB/octave, continuously variable Driver: 12 (250mm) MMD Dimensions (H x W x D): 18 x 14-3/8 x 18-3/4 (with grille) (457mm x 365mm x 476mm) Weight: 44.7 lb (20.3kg) Infinity continually strives to u
4、pdate 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. 1 PS series PS212 subwoofer RadioFans.CN 收音机爱 好者资料库 PS 212 subwoofer 400 W Powered Sub/ Plate Amp LIN
5、E VOLTAGEYes/NoHi/Lo LineNom.UnitNotes NA 120vac/60HzYes108-132120VrmsNormal Operation EU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS required ParameterSpecificationUnit QA Test LimitsConditionsNotes Amp Section Type (Class AB, D, other)D- Load Impedance (speaker)4OhmsNominalZ-curve requir
6、ed Rated Output Power300WattsRegulated 120 V line THD Rated Power1%22k filter, 50Hz300W THD 1 Watt0.5%22k filter, 50Hz DC OffsetundefinedmV-DC 15measured at 50 Hz Input Sensitivity Line Input130 mVmVrms300 W 50Hz1 input driven Signal to Noise SNR-A-Weighted100dBArelative to rated powerA-Weighting fi
7、lter SNR-unweighted70dBrrelative to rated power22k filter SNR rel. 1W-unweighted60dBrrelative to 1W Output22k filter Residual 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 Imp
8、edance Line Input6.5 kohmsNominal Active Filters Low Pass (fixed or variable)VARIABLE- Frequency50 - 150 Hz Slope24dB/Octave QButterworth - High Pass (HPF)FIXXED- Frequency29Hz Slope12dB/Octave Q2 - Friend CircuitFIXXED- Frequency60Hznotch filter Slope6dB/Octave Q2.5 - Video BoostNONE- Boost dB Rang
9、e Hz Switches Main Power ON/OFFYES- Typerocker-Located on amp plateTV-5 LFE/ Low Pass filter modeYES- Typemini toggle -Located on amp plate Polarity SwitchYES-Off: 0; On: 180 Typemini toggle -Located on amp plate Limiter (yes/no)YEScompressor and limiter THD at Max. Output Powerless than 2%Maximum O
10、utput PowerMaximum THD as a result of limiting. Output Level Control Volume Control PotYES-gain control mounted on amp panel Taper (lin/log)log A taoer- minimum settingno output Input/Output Configuration Line In (L,C,R,AC3,Mono)Stereo-RCA phono jack, gold plated LFE InYES-Shared with R Line In jack
11、 Signal Sensing (ATO) Auto-Turn-On (yes/no)YES- ATO Input Test Frequency100Hz ATO Input Threshold1mVtyp.LPF On, BOS Off ATO Low Pass cutoff1kHzATO-LPF for noise immunityLPF On, BOS Off 2 PS series PS212 subwoofer ParameterSpecificationUnit QA Test LimitsConditionsNotes ATO Turn-on time2sAmp connecte
12、d and AC on, then input signal applied ( 1 W output ) Auto Mute / Turn-OFF Time10minutes 5 t 15Time before muting, after signal is removed Power on Features Power on Delay timegreater than 2sec.AC Power Applied Power on LEDYES-Bi-color LED located on amp panel Normal On/Offgreen / redcolorATO mode o
13、nly ATO-colorActive: green; Standby: red Transients/Pops ATO Transient5mV-peak Speaker Outputs Turn-on Transient30mV-peak Speaker OutputsAC Line cycled from OFF to ON Turn-off Transient30mV-peak Speaker OutputsAC Line cycled from ON to OFF Efficiency Stand-by Input Power10Wattstyp. nom. line voltage
14、 AC Power Cons.1W12Wattstyp. nom. line voltage Power Cons.rated power473Wattstyp. nom. line voltageInput power measured is REAL Watts, not VA Efficiency63%typ. nom. line voltage Protection Short Circuit Protection YES-Direct short at output Thermal Protection YES- threshold 65 deg. C at panel DC Off
15、set ProtectionYES-DC present at Speaker Out leadRelay for driver/fire protection Line Fuse Rating ( 120 V )3.15AmpsType ADL or MDL Fuse holder on inside surface of amp panel 3 PS series PS212 subwoofer PS212 PACKAGE 4 PS series PS212 subwoofer Rear Panel CONTROLS ANDCONNECTIONS Line In 15050 Green:
16、On Red: Standby LFE Input Phase Normal LFE Crossover Hz MaxMin Level Power PS212 ? Power Switch Line-Level/LFE Input Status LED Crossover Adjustment Subwoofer-Level Control LFE/Normal Selector Phase Switch 5 PS series PS212 subwoofer SYSTEMCONNECTIONS If your receiver/processor does not contain a Do
17、lby Digital or DTS processor but has subwoofer outputs: Set line-level/LFE switch to “Normal.” NOTE: If your receiver/processor has only one sub out,you may use either the L or R input. Set LFE/Normal switch to “LFE.” If you have a DolbyDigital or DTSreceiver/processor with a low-frequency effects (
18、LFE) or subwoofer output: 6 PS series PS212 subwoofer OPERATION Power On Plug your subwoofersAC cord into a wall outlet.Do not use the outlets 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 rear panel.
19、Turn on your entire audio system and start a CD or movie soundtrack at a moderate level. Auto On/Standby With 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 = STANDBY (No signal detected,Amp O
20、ff) 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 subwoofer will then power ON instantly when a signal is detected.During periods of normal use,the Power Switch can be left
21、on.You may turn off the Power Switch for extended periods of nonoperation,e.g.,when you are away on vacation. Adjust Gain Turn your Subwoofer-Level Control up to the halfway position.If no sound emanates from the subwoofer,check the AC-line cord and input cables.Are the connectors on the cables maki
22、ng 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 overall volume control o
23、f the preamplifier or stereo to a comfort- able level.Adjust the Subwoofer-Level Control until you obtain a pleasing blend of bass.Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range.Many users have a tendency to set the s
24、ubwoofer volume too loud,adhering to the belief that a subwoofer is there to produce lots of bass.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 as well as heard.However,overall balance must be maintained or the mus
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