JBL E250P free download

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NorthridgeTM E-Series Powered Subwoofer E250P Service Manual JBL Consumer Products 250 Crossways Park Dr. Woodbury, New York 11797 Rev2 2/2004 E250P - CONTENTS BASIC SPECIFICATIONS ...1 SAFETY INFORMATION ...2 DETAILED SPECIFICATIONS ...3 CONNECTIONS...4 OPERATION ...7 BASIC TROUBLESHOOTING...8 EXPLODED VIEW/PARTS LIST...9 TEST SET-UP AND PROCEDURE...10 AMPLIFIER BLOCK DIAGRAM...11 TECH TIP JBLTT2003-04 ...12 DETAILED TROUBLESHOOTING... ...13 P.C.B. DRAWINGS...16 ELECTRICAL PARTS LIST ...20 IC/TRANSISTOR PINOUTS...24 SCHEMATICS...25 PACKING...27 E250P SPECIFICATIONS Amplifier Power (RMS): Peak Dynamic Power *: Driver: Inputs: Low-Pass Frequency: Frequency Response: Dimensions (H x W x D): Weight: 250 Watts 550 Watts 12" (305mm) PolyPlasTM Line Level (switchable to LFE) and Speaker Level with 5-way binding posts Variable from 50Hz to 150Hz 25Hz ­ Low-pass crossover setting 19-3/4" x 14-3/8" x 16-1/2" (502mm x 365mm x 419mm) 43 lb/19.5kg JBL continually strives to update and improve existing products, as well as create new ones. The specifications and details in this and related JBL publications are therefore subject to change without notice. * The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off. 1 E250P SAFETY INFORMATION Warning Any person performing service of this unit will be exposed to hazardous voltages and the risk of electric shock. It is assumed that any person who removes the amplifier from this cabinet has been properly trained in protecting against avoidable injury and shock. Therefore, any service procedures are to be performed by qualified service personal ONLY! List of Safety Components Requiring Exact Replacements Part Number/ Designator F1 093-105202-300 083-041802-009 Description Line Fuse Slo Blo 2.0A 5x20mm 250V UL approved SPT-2 or better with polarized plug, UL approved wired with the hot side to fused side. Use with factory replacement panel strain relief (70305) only. Power Transformer. Use only factory replacement. Bridge diode. Use only factory replacement. 3300uF 80V electrolytic filter caps. Be sure replacement part is at least the same working voltage and capacitance rating. Also the lead spacing is important. Incorrect spacing may cause premature failure due