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Studio L Series L8400P Amplifier/Subwoofer SERVICE MANUAL JBL Consumer Products 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 3/2006 L8400P L series - CONTENTS BASIC SPECIFICATIONS...1 PACKAGING...2 DETAILED SPECIFICATIONS...3 CONNECTIONS... 5 OPERATION ...7 BASIC TROUBLESHOOTING...8 EXPLODED VIEW...9 120V BLOCK DIAGRAM...10 PCB DRAWINGS...11 120V ELECTRICAL PARTS LIST ...15 INTEGRATED CIRCUIT/TRANSISTOR PINOUTS...19 120V SCHEMATICS... ...20 L8400P BASIC SPECIFICATIONS Amplifier Power (RMS) Peak Dynamic Power * Frequency Response (­3dB) Low-Pass Crossover Frequencies Low-Frequency Transducer Baffle Enclosure Inputs 600 Watts 1200 Watts 22Hz ­ Low-pass crossover frequency 50Hz ­ 150Hz, Continuously adjustable 12" (300mm) PolyPlasTM cone Low diffraction, IsoPowerTM Sealed Gold-plated 5-way binding-post speaker-level; Left and right line-level, switchable to LFE Outputs 150Hz when using speaker-level connection Gold-plated 5-way binding-posts Dimensions (H x W x D) 16-1/2" (15-1/2" without feet) x 15-1/2" x 15-1/2" (419mm [394mm without feet] x 394mm x 394mm) Weight 58 lb (26.4kg) * The Peak Dynamic Power is measured by recording the highest peak-to-center voltage produced by the power amplifier with its limiters disabled, across the output of a resistive load equal to minimum impedance of the transducer, using a 50Hz sine waveburst, 3 cycles on, 17 cycles off. Occasional refinements may be made to existing products without notice but will always meet or exceed original specifications unless otherwise stated 1 L8400P Packaging 1 3 4 7 8 6 2 6 5 ITEM NO. 1. 2. 3. 4. 5. DESCRIPTION Owner's Manual Front Grille Warranty Card, JBL 5YR/1YR Kit, Spike Foot L8400P Outer Carton, Black L8400P Outer Carton, Beech L8400P Outer Carton, Cherry QTY. 1 1 1 4 1 1 1 PART NO. 354038-001 353234-001 338381-001 354432-001 353588-001 353588-002 353588-003 ITEM NO. 6. 7. 8. DESCRIPTION Pad, Foam, Top, Bottom L8400P Y-Adapter Cable Foot, Bump-On 3M, SJ5744 QTY. PART NO. 2 353592-001 1 354058-001 4 330104-001 2 L8400P L series L8400P Powered Sub/ Plate Amp LINE VOLTAGE US 120VAC/60Hz EU 230VAC/50-60Hz Yes/No Yes Yes Hi/Lo Line 108-132 207-264 Nom. 120 230 QA Test Limits Unit Vrms Vrms Notes Normal Operation Normal operation, MOMS required Parameter Amp Section Spec. Unit Conditions Notes Bridge type amplifier, None of the speaker terminals must be connected to system GND at any time. Type (C