Jbl s 412 p mk2 service manual

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- CONTENTS - BASIC SPECIFICATIONS -¦-¦-¦-¦.-¦.-¦-¦..-¦-¦-¦-¦..1 DETAILED SPECIFICATIONS -¦-¦-¦..-¦-¦..-¦-¦-¦-¦..2 CONNECTIONS-¦-¦-¦-¦-¦.-¦-¦-¦-¦-¦-¦-¦-¦....-¦..-¦4 CONTROLS -¦-¦..-¦-¦-¦-¦-¦-¦.-¦..-¦-¦....-¦-¦.-¦.-¦..6 BASIC TROUBLESHOOTING..-¦.-¦-¦-¦.-¦-¦-¦-¦-¦-¦7 AMPLIFIER ACCESS-¦.-¦-¦-¦-¦-¦-¦.-¦.-¦-¦-¦-¦-¦....8 S412PII AMPLIFIER BLOCK DIAGRAM.-¦.-¦-¦-¦..-¦..9 S412PII W IRING/PASSIVE SCHEMATIC-¦.-¦-¦-¦-¦.10 S412PII MECHANICAL/PACKING PARTS LIST -¦.-¦.11 S412PII EXPLODED VIEW..-¦-¦-¦-¦-¦-¦-¦.-¦. -¦-¦.12 AMPLIFIER EXPLODED VIEW ..-¦-¦-¦-¦-¦.-¦-¦-¦-¦.13 IC DIAGRAMS-¦-¦-¦-¦-¦-¦..-¦-¦-¦-¦-¦-¦..-¦-¦-¦-¦.14 S412PII ELECTRICAL PARTS LIST ..-¦-¦-¦.-¦-¦.-¦..15 P.C.B. DRAW INGS-¦.-¦-¦-¦..-¦-¦-¦-¦-¦-¦...-¦.-¦-¦.18 S412PII SCHEMATICS-¦-¦-¦..-¦-¦-¦-¦-¦..-¦-¦-¦.-¦.20 S412PII PACKAGING-¦-¦-¦..-¦-¦-¦-¦-¦..-¦-¦..-¦.-¦.23 JBL S412PII SPECIFICATIONS Max Recommended Amplifier Power: 250 W atts* Subwoofer Amplifier Power: 200 W atts Nominal Impedance 8 ohms Sensitivity 92dB Frequency Response 32Hz -“ 20kHz (±3dB) Crossover Frequencies 250Hz, 700Hz, 3500Hz High-Frequency Driver: 1" Pure Titanium Dome, shielded Midrange Frequency Driver: 4" PolyPlas-„¢ Rubber surround, shielded Midbass Frequency Driver: 6" PolyPlas-„¢ Rubber surround, shielded Low Frequency Driver: 12" PolyPlas-„¢ Rubber surround, shielded Dimensions (H x W x D): 44 x 14 ¾ x 16 1/16 (17 with grille) 1118 x 375 x 408mm (432mm with grille) W eight (each): 100lbs/45.5kg * The maximum recommended amplifier power rating will ensure proper system headroom to allow for occasional peaks. W e do not recommend sustained operation at these maximum power lev els.

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JBL S412PII -120VAC 150W Powered Sub/ Plate Amp LINE VOLTAGE Yes/N o Hi/Lo Lin e Nom. Uni t Note s US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required Asia 100vac/50Hz No N/A 100 Vrms Normal Operation Parameter Specification Unit QA Test LimitsConditions Notes Am p Sectio n Type (Class AB, D, other) G n/a n/a Load Impedance (speaker) 4 Ohms n/a Nominal Z-curve required Rated Output Power 150 Watts 130 1 input driven 130 W nominal due to limiter non-linearity at high power THD @ Rated Power 0.1 % 1 22k filter 130 W THD @ 1 Watt 0.3 % 0.5 22k filter DC Offset 10 mV-DC 20 @ Speaker Outputs Damping factor >150 DF 100 Measured at amplifier board Measured at the speaker connector. 130 Watts @ THD < 0.08 % @ 50 Hz >75 50 Measured at speaker cable In put Sensitivit y Input Frequency 30 Hz 30 Nominal Freq. LFE input 1.05 Vrms ±2dB To 140 Watts Speaker/Hi Level Input 23.66 Vrms ±2dB To 140 Watts Si gnal to Nois e SNR-A-Weighted 100 dBA 90 relative to rated power A-Weighting filter SNR-unweighted 70 dBr 70 relative to rated power 22k filter SNR rel. 1W-unweighted 65 dBr 60 relative to 1W Output 22k filter Residual Noise Floor 1 mVrms 5 Volume @max, using RMS reading DMM/VOM (or A/P) Residual Noise Floor 1.5 mVrms(max) 4 Volume @max, w/ A/P Swept Bandpass Measurement (Line freq. + harmonics) In put Im pedanc eLine Input 20k ohms n/a Nominal Speaker/Hi Level Input 10k ohms n/a Nominal Filter s Speaker in LP 2nd order fixed Fixed Subsonic filter (HPF) LFE Low pass 2nd order Fixed LFE input driven only Limiter THD at Max. Output Power n/a n/a functional Maximum Output Power Maximum THD as a result of limiting. Features-- Auto - On selection switch YES -- functional Refer to ATO section LED On-Off switch YES -- functional Dual LED indicator Volume pot Taper (lin/log) LOG -- functional A Taper In put Confi guratio n Line In LFE YES -- functional Single RCA jack Spkr/Hi Level In YES -- functional Si gnal Sensin g (ATO ) Auto-Turn-On (yes/no) YES functional Auto - on selection switch in Auto ATO Input test frequency 30 Hz functional " ATO Level LFE Input 4 mV functional " ATO Level Speaker in 100 mV functional " ATO Turn-on time 5 ms functional Amp connected and AC on, then input signal applied Auto Mute/ Turn-OFF Time 15 minutes 17 T before muting, after signal is removedMaximum Power on Dela y tim e 3 sec. 4 AC Power Applied Transients/Po ps ATO Transient 5 mV-peak n/a @ Speaker Outputs Turn-on Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from OFF to ON Turn-off Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from ON to OFF