Jbl s 120 p mk2 service manual
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Extracted text from jbl s 120 p mk2 service manual (Ocr-read)
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- CONTENTS - BASIC SPECIFICATIONS …………………..…………..1 DETAILED SPECIFICATIONS ……………..…………..2 CONNECTIONS………………………..……..…...…..…4 OPERATION ……..………………………...…….….…...7 BASIC TROUBLESHOOTING..…………………………8 S120PII AMPLIFIER BLOCK DIAGRAM……………….9 S120PII MECHANICAL/PACKING PARTS LIST….....10 P.C.B. DRAW INGS….…………………………….…….11 S120PII ELECTRICAL PARTS LIST ..…………….….13 S120PII SCHEMATICS………..…………………….….20 JBL S120PII SPECIFICATIONS Amplifier Power (RMS): 400 W atts Driver: 12" PolyPlas™ (polymer-coated cellulose fiber) Inputs: Line Level (switchable to LFE), BassQ™ and Speaker Level Outputs: BassQ and Speaker Level (High-Pass) Low-Pass Frequency: Continuously variable from 50Hz – 150Hz High-Pass Frequency: 150Hz when using speaker-level outputs Frequency Response: 22Hz – Low-pass crossover setting Dimensions (H x W x D): 17-3/16" x 16-3/16" x 18" (19" with grille) (with feet, without spikes) 437 x 411 x 457mm (483mm with grille) Weight: 56 lb/25.5kg All features and specifications are subject to change without notice.
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S120PII 300W Powered Sub/ Plate Amp LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required Parameter Spec UnitQA Test Limits Conditions Notes Amp Section Type (Class AB, D, other) D n/a n/aBridge type amplifier, None of the speaker terminals must be connected to system GND at any time. Load Impedance (speaker) 6 Ohms n/a Nominal Rated Output Power 275 Watts 220 1 input drivenLimiter prevents continuous power to exceed 220 Watts. THD @ Rated Power 0.1 % 1 22k filter THD @ 1 Watt 0.1 % 0.5 22k filter DC Offset 10 mV-DC 60 @ Speaker Outputs Damping factor >50 DF 23 Measured at amplifier board Measured at the speaker cable. 200 Watts, measured at speaker output terminals located at the amp board. Input Sensitivity Input Frequency 50 Hz 50 Nominal Freq. L&R 425 mVrms ±2dB To 200 Watts Single input driven LFE Mode selected 425 mVrms ±2dB To 200 Watts LFE Mode selected, single input driven Bass Q Input 0.9 Vrms ±2dB To 200 Watts Single input driven Speaker/Hi Level Input 5.5 Vrms ±2dB To 200 Watts Single input driven Signal to Noise SNR-A-Weighted 100 dBA 85 relative to rated power A-Weighting filter SNR-unweighted 90 dBr 85 relative to rated power 22k filter SNR rel. 1W-unweighted 65 dBr 60 relative to 1W Output 22k filter Residual Noise Floor 1 mVrms 2Volume @max, using RMS reading DMM/VOM (or A/P) Residual Noise Floor 1 mVrms (max ) 2Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) Input Impedance Line Input (L, R,LFE) 10K ohms n/a Nominal Speaker/Hi Level Input 10K ohms n/a Nominal Filters LP 4th order fixed 50-150 Hz ± 10 2nd order variable and 2nd order fixed Subsonic filter (HPF) 3rd Order Fixed LFE Low pass 2nd order Fixed Hz ± 10 LFE input driven only Limiter THD at Max. Output Power YES n/a functional Maximum Output Power Features-- Auto - On -Off switch YES -- functional Refer to ATO section Phase switch 0-180 deg functional Volume pot Taper (lin/log) LOG -- functional A Taper Variable crossover 50-150 Hz YES functional HP Speaker out functional HP single order filter 180 Hz @ 8 Ohms, 90 Hz @ 4 Ohms load LFE -Normal Select switch YES -- functional Disables LP filter, intended for LFE BassQ Input YES functional 6.3mm Phono Jack BassQ Output YES functional Bypass, loop-through - Designed for daisy chain Input Configuration Line In (L,R) & LFE YES -- functional Dual RCA jack Bass Q in YES functional 6.3m phono mono Jack Spkr/Hi Level In YES -- functional Binding post connector L&R Signal Sensing (ATO) Auto-Turn-On (yes/no) YES functional Auto - on selection switch in Auto ATO Input test frequency 50 Hz functional " ATO Level LFE Input 2 mV functional " ATO Level Speaker in 50 mV functional " ATO Level Bass Q input 2 mV functional " ATO Turn-on time 1 seconds functional Amp connected and AC on, then input signal applied Auto Mute/ Turn-OFF Time 15 minutes 17T before muting, after signal is removedAuto turn of time (T) must be 10 > T < 17 Minutes Power on Delay time3 sec. 4 AC Power Applied