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Models:
™
Northridge E-Series E250P
Performance Series P12SW
Powered Subwoofers
Service Manual
JBL Consumer Products
250 Crossways Park Dr.
Woodbury, New York 11797 Rev3 4/2006
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E250P/P12SW subwoofers - CONTENTS - BASIC SPECIFICATIONS …………….……..…………..1 SAFETY INFORMATION …………….……..….………..2 E250P PACKING……..………………….….….….……...3 P12SW PACKING……..……………………….…………4 DETAILED SPECIFICATIONS ……….……..…………..5 CONNECTIONS………………………...……..…...…..…6 OPERATION ……..………………….……...…….….…...9 BASIC TROUBLESHOOTING…………………………..10 E250P EXPLODED VIEW/PARTS LIST……………….11 P12SW EXPLODED VIEW/PARTS LIST……….……..12 TEST SET-UP AND PROCEDURE….…………………13 AMPLIFIER BLOCK D
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E250P/P12SW subwoofers SAFETY INFORMATION Warning List of Safety Components Requiring Exact Replacements 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 Part Number/ Description against avoidable injury and shock. Therefore, any service Designator procedures are to be performed by quali
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E250P Packaging 1 5 3 14 2 4 Ref# Part Number Description Qty 1 351249-002 MANUAL, OWNER-E250P/E250P 1 2 351249-001 CARTON,MASTER-E250P (BEECH MODEL) 1 351249-003 CARTON,MASTER-E250P (BLACK MODEL) 1 350884-003 CARTON,MASTER-E250P (CHERRY MODEL) 1 3 351252-001 PAD,END,TOP-E250P 1 4 351252-002 PAD,END,BOT-E250P 1 5 338381-001 WARRANTY CARD,1/5YR,JBL 1 14 352024-001 ASY, GRILLE, BLK, FRNT
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P12SW Packaging 1 5 3 6 2 4 Ref# Part Number Description Qty 1 361803-001 P12SW Owner’s Manual 1 2 361813-001 P12SW Outer Carton 1 3 351252-001 Packing Foam (Top) 1 4 351252-002 Packing Foam (Bottom) 1 5 338381-001 Warranty Card 1 6 352024-003 Front Grille 1 4
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E250P/P12SW subwoofers JBL E250P/P12SW 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 QA Test Parameter Specification Unit Limits Conditions Notes Amp Section Type (Class AB, D, other) D n/a n/a n/a Load Impedance (speaker) 5.6 Ohms Nominal Rated Output Power (120VAC 150 Watts 140 Domestic version only 120 VAC-60 Hz Rated Output Power
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E250P/P12SW subwoofers QA Test Parameter Specification Unit Limits Conditions Notes 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 Efficiency Efficiency 65 % 64 Nominal Line voltage 120 VAC Maximum allowable input power under nominal Input voltage and frequency, HOT or COLD Stand-by Input Power 24 Watts 26 @ nom. line voltage operation. Power Cons. @ rated powe
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E250P/P12SW subwoofers Analog Receiver/Processor – Speaker-Level Connections Use this installation method the left high-level inputs on speaker and left input on the only with an analog receiver/ the subwoofer. Insert the subwoofer, and then for the (+) processor that does not have joined (twisted) wires into the and (–) connections for the digital processing or bass left front (+) terminal on your right front speaker and right management, and also does receiver/amplifier. Connect the
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E250P/P12SW subwoofers Analog Receiver/Processor – Line-Level Connections Use this installation method may connect the subwoofer with an analog receiver/ output on your receiver/pre- processor that does not have amplifier to either the left or digital processing or bass right line-level input on the LEVEL management, and that is subwoofer. It makes no differ- Min Max equipped with a full-range ence which jack you choose. LFE NORMAL subwoofer output or a volume- Connect
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LEVEL Max Min LFE NORMAL PHASE 0º 180º CROSSOVER FREQUENCY 150Hz 50Hz L R LINE LEVEL IN For LFE use L or R L HIGH LEVEL IN R + – ON OFF 120V 60Hz POWER Northridge E Series CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN E250P/P12SW subwoofers OPERATION Power When the unit is plugged in Note: It will take several min- sumption is minimal when the and the power switch is on utes for the LED to turn from subwoofer is not receiving a and no signal is received, the
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E250P/P12SW subwoofers Phase Control The Phase Control determines bass output at the listening If at some time in the future whether the subwoofer’s pis- position. you happen to rearrange your ton-like action moves in and listening room and move your Remember, every system, out in phase with the main speakers, you should experi- room and listener is different. speakers or opposite the ment with the phase switch in There are no right or wrong main speakers. There is no both positions,
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15 6 7 10 17 E250P Amplifier – Not for Sale Exploded View 14 9 8 11 16 12 13 Ref# Part Number Description Qty 6 351348-001 PLATE,LED/LOGO-E250P 1 7 338125-002 ASY,LED-E250P/E250P 1 8 336486-001 ASY,FOOT,PLSTC- E250P 4 9 763-31110-40 SCREW, 8 X 2 1/2,TR,PH,PB,BLK ZINC,LCS (FOOT) 4 10 908302-012 SCREW, PB,HXS,#6x.75,ZINC (LOGO PLATE) 4 11 903802-016 SCREW, PB,HXS,#8x1",ZINC (WOOFER) 8 12 338128-002 ASY, WOOFER,12"
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2 3 P12SW Amplifier – Not for Sale Exploded View 1 10 9 5 8 4 6 7 Ref# Part Number Description Qty 1 352024-003 ASY, GRILLE, BLK, FRNT 1 2 333249-001 CUP,GRILLE 4 3 882-41110-12 SCREW, 6 X 3/4,PAN,PH,PB,BLK ZINC,LCS (AMPLIFIER) 10 4 903802-016 SCREW, PB,HXS,#8x1",ZINC (WOOFER) 8 5 351243-001 RING,TRIM,12" 1 6 338128-002 1 ASY, WOOFER,12" DCR 4.8 Ω 7 336799-001 ASY, PORT TUBE 1 8 336486-001 ASY,FOOT,PLSTC 4 9 883-31110-40 SCREW, 8 X 2 1/2,TR,
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E250P/P12SW subwoofers TEST SET-UP AND PROCEDURE General Function UUT = Unit Under Test 1) Connect a pair of level input cables (RCA) from signal generator to either Right or Left Level input on UUT. LEVEL control should be full counterclockwise (MIN). Make sure the LFE/Normal switch is in the NORMAL position. 2) Turn on generator, adjust to 100mV, 50Hz. 3) Plug in UUT; Turn Main Power switch ON. LED may be either Red or Green. Turn LEVEL control full clockwise (MAX
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E250P/P12SW subwoofers & P10SW & P12SW 14
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E250P subwoofer Service Bulletin Service bulletin # JBL2005-01 December 2005 Warranty labor rate: MINOR repair To: All JBL Service Centers Model: E150P, E250P Subwoofers Subject: “Chirp” Noise on Power-Up In the event you receive an E150P or E250P with the complaint: “the subwoofer make a slight “chirp” noise when it becomes active from the stand-by mode”, perform the following modification. Synopsis: Change C65 PE capacitor from 470µf to 47
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E250P/P12SW subwoofers TECH TIPS Troubleshooting tips and solutions to common service problems For models: E150P,E250P TIP# JBLTT2003-04 Rev2 P10SW, P12SW PB10,PB12 (Revision 2) * Subject: Replacing MOSFETS Q18, Q22 In the event you need to replace MOSFET transistors Q18 or Q22 as part of a repair, it is important to use ONLY: • JBL part# 051-640001-000 • Or JBL part# FE106401110 • Or only the brands: International Rectifier, or Fairchild.
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E250P/P12SW subwoofers DETAILED TROUBLESHOOTING A. Power Amp Section Resistance Resistance from S+ (SPK O/P) to GND should be >1M Ω (NO LOAD) Check Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read >10k Ω Resistance from V+ (C6 P+) to S+ (SPK O/P) should read >1MΩ Resistance from V- (C8 P-) to S+ (SPK O/P) should read >1M Ω 2. Power Up LED RED With a 5mV signal to Low level input, LED should change to GREEN -Voltage measurements
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E250P/P12SW subwoofers DETAILED TROUBLESHOOTING (CONT'D) - Voltage measurements OP AMP SPEAKER U2(1) U2(14) U2(8) U3(7) U3(1) U3(14) U3(8) U5(7) U5(1) O/P 306.9mV 461mV 460mV 658mV 628mV 598mV 2.326V 2.02V 3.57V 23.33V 2. High Level Input Sensitivity -Set up Turn level, X’OVER FREQ POT Fully CW and LFE switch off Set Generator at 1.3V@50Hz Signal to High level input -Voltage measurements 15.3V at speaker output 3. Low-Pass
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E250P/P12SW subwoofers DETAILED TROUBLESHOOTING (CONT'D) FLOW CHART CAUTION : SPEAKER OUTPUT IS FLOATING AND IS NOT PROTECTED AGAINST A SHORT TO GROUND. ALL TEST INSTRUMENTS CONNECTED TO THE OUTPUT MUST BE FLOATING. ATTACH THE SCOPE PROBE TIP TO S - and REFERENCE LEAD TO S+. (A 10mV signal may need from the input to trigger the Switch turn
