Jbl sub 300 service manual
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Extracted text from jbl sub 300 service manual (Ocr-read)
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Note: The SUB300 is part of the SCS300.7 system Satellite loudspeakers SCS300SAT: order JBL part# SCS300SAT-1 Center channel SCS300CEN: order JBL part# SCS200/300CEN-1 - CONTENTS - BASIC SPECIFICATIONS ……………….….….….….…………….1 DETAILED SPECIFICATIONS ……..…………….……………..2 OPERATION ………….……………………………..……\ ……….4 CONNECTIONS..………………………..………….…….……\ …...5 BASIC TROUBLESHOOTING…..…………….….….…….……...7 TEST SET-UP A ND PROCEDURE……………………………….8 EXPLODED VIEW /PARTS LIST…………………………………..9 BLOCK DIAGRAM..……………………………………………..\ ...10 PCB DRAW INGS………………..………………………………\ ...11 120V ELECTRICAL PARTS LIST ………………..……………..13 230V ELECTRICAL PARTS LIST …………………..…………..16 INTEGRATED CIRCUIT/TRANSISTOR PINOUTS .................19 120V SCHEMATICS.………..………………….………. ………20 \ 230V SCHEMATICS.………..…………………….……. ………23 PACKAGING…………………………….…………………\ ……...25 BASIC SPECIFICATIONS SUB300 Subwoofer Configuration: Floor-firing, bass-reflex ported enclosure Woofer: 10" (254mm) cone Amplifier Power output: 150W Continuous RMS power Frequency response: 30Hz – 120Hz (-6dB) Dimensions (including feet): 20 x 13 ¾ x 15 ¾ (508 x 349 x 400mm) Weight: 35 lb/15.9kg Occasional refinements may be made to existing products without notice but w ill always meet or exceed original specifications unless otherwise stated 1
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JBL SUB 300 150W Powered Sub/ Plate Amp LINE VOLTAGE Yes/No Hi/Lo Line Unit NotesUS 120VAC/60Hz Yes 108-132 Vrms Normal Operation Asia 100VAC/50Hz Yes 90-110 Vrms Normal Operation EU 230VAC/50-60Hz Yes 207-264 Vrms Normal Operation Normal operation, MOMS required Parameter Specification Unit QA Test Limits Conditions Notes Amp Section Type (Class AB, D, other) D D N/A Load Impedance (speaker) 4 Ohms N/A Nominal Rated Output Power 150 Watts 140 1 input driven THD@ Rated Power 0.5 % 1 22KHz filter THD @ 1 Watt 0.1 % 0.3 22KHz filter DC Offset 10 mV-DC 50 @ Speaker Outputs Damping factor >100 DF 30Measured at speaker terminals, Output power 140 Watts THD 0.1 % Input Sensitivity Input Frequency 50 Hz 50 Nominal Freq. 1 input driven Line Input (L&R) 250 mVrms ±2dB To rated power 1 input driven LFE Input 145 mVrms ±2dB To rated power LFE input driven only Speaker/Hi Level Input 2.5 Vrms ±2dB To rated power (-20 dB below Line In)...1 input driven Signal to Noise SNR-A-Weighted 100 dBA 85 rel. to rated power A-Weighting filter SNR-unweighted 90 dBr 80 rel. to rated power 22KHz filter SNR @ 1W-unweighted 60 dBr 55 rel. to 1W Output 22KHz filter Residual Noise Floor 1 mVrms 2Volume @max, using RMS reading DMM/VOM (or A/P) Residual Noise Floor 1 mVrms(max) 2 Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) Input Impedance Line input L&R , LFE >10 K ohms N/A Nominal Speaker/Hi Level Input 4.7 K ohms N/A Nominal Filters Left & Right Low Pass fixed Hz -- ±2dB Slope & Q 4th dB/Octave N/A LFE Low Pass fixed Hz -- ±2dB Slope & Q 2nd dB/Octave N/A Subsonic filter (HPF) Hz -- ±2dB Slope & Q 2nd dB/Octave N/A Limiter (yes/no) YES -- N/A THD at Max. Output Power N/A -- N/A Features LFE Input YES functional BW Limited to 500 Hz Volume pot Taper (lin/log) log -- functional ATO YES functional Input Configuration Line In (L,R) L ,R -- functional RCA inputs: L , R Summed to Mono Line level in LFE LFE functional Spkr/Hi Level In (L,R) L,R -- functional L R Summed to Mono Spkr Out: Level out (L,R)Hi P L,R functional Direct by pass from Speaker in Signal Sensing (ATO) ATO test Frequency 50 Hz functional ATO Line Level 2 mV functional2mV@50Hz into Line Input w/ 1 ch. driven ATO Speaker level input 50 mV fucntional50mV@50Hz into Line Input w/ 1 ch. driven ATO Turn-on time 5 ms functionalAmp connected and AC on, then input signal applied Auto Mute/ Turn-OFF Time 15 minutes functionalT before muting, after signal is removed Auto turn of time (T) must be 10 > T <15 Power on Delay time 3 sec.functional AC Power Applied SUB300 (SCS300.7sys) 2