JBL SUB125 free download

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SUB125/125a SERVICE MANUAL Amplifier/Subwoofer JBL Consumer Products Inc. 250 Crossways Park Drive Woodbury, N.Y. 11797 A Harman International Company Rev B 7/2003 Amplifier/Subwoofer SUB125 The SUB125 is part of the SCS125/125a system TABLE OF CONTENTS COVER ...1 GENERAL SPECIFICATIONS ...2 TABLE OF CONTENTS...2 SCS125/125a SPECIFICATIONS ...3 CONTROLS AND THEIR FUNCTION...5 SCS125/125a SPEAKER LEVEL CONNECTIONS ...6 SCS125/125a LINE LEVEL CONNECTIONS ...7 SUB125 TEST SET UP AND PROCEDURE...8 SIMPLE TROUBLESHOOTING ...9 Service Bulletin JBL9901 ...10 SCS125/125a PACKING...11 SUB125 EXPLODED VIEW...12 SUB125 PCB COMPONENT SIDE ...13 SUB125 PCB SOLDER SIDE...14 SUB125 ELECTRICAL PARTS LIST ...15 SUB125 INTEGRATED CIRCUIT DIAGRAMS ...17 SUB125 POWER AMP SCHEMATIC DIAGRAM...18 SUB125 PRE-AMP SCHEMATIC DIAGRAM...19 GENERAL SPECIFICATIONS SCS125/125a System Frequency Response 35Hz ­ 20kHz (­6dB) SUB125 Amplifier . . 75 watts RMS Bass . . . . . 8" woofer, bass-reflex enclosure Dimensions (H x W x D) 14-1/8 x 13 x 13 inches 359 x 330 x 330mm Weight . . . 27.5 lbs/12.5 kg Refinements may be made on occasion to existing products without notice, but will always meet or exceed original specifications unless otherwise stated. 2 Amplifier/Subwoofer SUB125 SCS125/125a SPECIFICATIONS LINE VOLTAGE US 120vac/60Hz EU 230vac/50-60Hz Asia 100vac/50Hz Yes/No Yes Yes Yes Spec. Amp Section Type (Class AB, D, other) Load Impedance (speaker) Rated Output Power THD@ Rated Power THD @ 1 Watt DC Offset Damping factor Input Sensitivity Input Frequency Line Input Speaker/Hi Level Input 50 220 4.26 Hz mVrms Vrms 50 ±2dB ±2dB Nominal Freq. To Rated Power To Rated Power 1 input driven 1 input driven (-26dB below Line In)...1 input driven AB 4 80 0.08 0.1 10 <200 AB Ohms Watts % % mV-DC DF n/a n/a 80 0.3 0.5 20 n/a Nominal 1 input driven 22k filter 22k filter @ Speaker Outputs Sink required for Class AB Z-curve required Hi/Lo Line 108-132 207-264 90-110 Unit Unit Vrms Vrms Vrms Limits Notes Normal Operation Normal operation, MOMS required Normal Operation Conditions Notes Signal to Noise SNR-A-Weighted SNR-unweighted SNR @ 1W-unweighted Residual Noise Floor Residual Noise Floor 100 80 60 1.5 1 dBA dBr dBr mVrms 90 60 55 2.5 rel. to rated power rel. to rated power rel. to 1W Output A-Weighting filter 22k filter 22k filter Volume @max, using RMS reading DMM/VOM (or A/P) Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics) mVrms(max) 2 Input Impedance Line Inp