Infinity PS 212 Service Manual
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Extracted text from Infinity PS 212 Service Manual (Ocr-read)
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- CONTENTS - BASIC SPECIFICATIONS …………………..……………..1 DETAILED SPECIFICATIONS…………………..……….…..2 PACKAGING……………….……………………….…....…\ .…4 CONTROLS AND CONNECTIONS…………..…….………..5 OPERATION….……………………………………………\ ..….7 EXPLODED VIEW /PARTS LIST …………….….…....……8 TEST SET UP AND PROCEDURE………………..…....……9 BLOCK DIAGRAM…………………………..………….…..…10 \ TROUBLESHOOTING FLOW CHART………………..........12 ELECTRICAL PARTS LIST (120v) ………………………….13 PCB DRAW INGS……………….……………………………..1\ 8 SEMICONDUCTOR PINOUTS……….……………….……..22 SCHEMATICS (120v)………………………………………..\ .23 Basic Specifications PS212 Powered Subwoofer Frequency Response: 25Hz – 150Hz (±3dB) Maximum Amplifier Output: 400 W atts RMS; 700 W atts 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) W eight: 44.7 lb (20.3kg) Infinity continually striv es to update and improv e 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. PS series PS212 subwoofer 1
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PS 212 subwoofer 400 W Powered Sub/ Plate Amp LINE VOLTAGEYes/N o Hi/Lo Lin e Nom.Uni t Note s NA 120vac/60Hz Yes 108-132 120 Vrms Normal Operation EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required Parameter Specification UnitQA Test Limits Conditions Notes Amp Sectio n Type (Class AB, D, other) D--- Load Impedance (speaker) 4 Ohms Nominal Z-curve required Rated Output Power 300 Watts Regulated 120 V line THD@ Rated Power 1 % 22k filter, 50Hz 300W THD @ 1 Watt 0.5 % 22k filter, 50Hz DC Offset undefined mV-DC < 20 @ Speaker Outputs Damping factor 20 N/A > 15 measured at 50 Hz Input Sensitivit y Line Input 130 mV mVrms 300 W @ 50Hz1 input driven Signal to Nois e SNR-A-Weighted 100 dBArelative to rated power A-Weighting filter SNR-unweighted 70 dBr relative to rated power 22k filter SNR rel. 1W-unweighted 60 dBr relative to 1W Output 22k filter Residual Noise Floor 2 mVrms Volume @max, using RMS reading DMM/VOM (or A/P) Residual Noise Floor 1 mVrms(max) Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)\ Input Impedanc e Line Input 6.5 k ohms Nominal Active Filter s Low Pass (fixed or variable ) VARIABLE -- Frequency 50 - 150 Hz Slope 24 dB/OctaveQ Butterworth -- High Pass (HPF ) FIXXED -- Frequency 29 Hz Slope 12 dB/Octave Q 2 -- Friend Circui t FIXXED -- Frequency 60 Hznotch filter Slope 6 dB/Octave Q 2.5 -- Video Boos t NONE -- Boost dB Range Hz Switches Main Power ON/OFF YES -- Type rocker -- Located on amp plate TV-5 LFE/ Low Pass filter mode YES -- Type mini toggle -- Located on amp plate Polarity Switch YES -- "Off": 0°; "On": 180° Type mini toggle -- Located on amp plate Limite r (yes/no ) YES compressor and limiter THD at Max. Output Power less than 2 % Maximum Output Power Maximum THD as a result of limiting. Output Level Contro l Volume Control Pot YES-- gain control mounted on amp panel Taper (lin/log) log A taoer -- @ minimum setting no output Input/Output Configuratio n Line In (L,C,R,AC3,Mono) Stereo -- RCA phono jack, gold plated LFE In YES -- Shared with "R" Line In jack Signal Sensing (ATO ) Auto-Turn-On (yes/no) YES-- ATO Input Test Frequency 100 Hz ATO Input Threshold 1 mV typ. LPF "On", BOS "Off" ATO Low Pass cutoff 1 kHz ATO-LPF for noise immunity LPF "On", BOS "Off" PS series PS212 subwoofer 2