E250p_p12sw_sm 电路图 维修原理图.pdf

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 收音机爱好者资料库 Ra d i o Fa n s .CN - 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 DIAGRAM14 E250P BULLETIN JBL2005-01. .15 E250P/P12SW TECH TIP JBLTT2003-04 .16 DETAILED TROUBLESHOOTING.17 P.C.B. DRAWINGS.20 ELECTRICAL PARTS LIST .24 IC/TRANSISTOR PINOUTS.28 SCHEMATICS.29 E250P, P12SW SPECIFICATIONS Amplifier Power (RMS): 250 Watts Peak Dynamic Power *: E250P: 550 Watts P12SW: 500 Watts Driver: 12 (305mm) PolyPlas Inputs: Line Level (switchable to LFE) and Speaker Level with 5-way binding posts Low-Pass Frequency: Variable from 50Hz to 150Hz Frequency Response: 25Hz Low-pass crossover setting Dimensions (H x W x D): 19-3/4 x 14-3/8 x 16-1/2 (502mm x 365mm x 419mm) Weight: 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. E250P/P12SW subwoofers E250P/P12SW subwoofers 收音机爱好者资料库 Ra d i o Fa n s .CN 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! Caution Early revisions of the unit did not have a power switch. Hazardous voltages are resent within the unit whenever it is plugged in. Before amplifier is plugged in, be sure its rated voltage corresponds to the voltage of the AC power source to be used. Incorrect voltage could cause damage to the amplifier when the AC power cord is plugged in. Do not exceed rated voltage by more than 10%: operation below 90% of rated voltage will cause poor performance or may shut the unit off. Leakage/Resistance Check Before returning the unit to the customer, perform a leakage or resistance test as follows: Leakage Current. Note there is no power switch on early revisions of this unit. When the power plug is plugged in, the unit is live. Connect the unit to its rated power source. Using an ammeter, measure the current between the neutral side of the AC supply and chassis ground of the unit under test. If leakage current exceeds 0.5mA, the unit is defective. Reverse the polarity of the AC supply and repeat. Resistance. Measure the resistance from either side of the line cord to chassis ground, If it is less than 500k ohms, the unit is defective. WARNING! DO NOT return the unit to the customer if it fails one of these tests until the problem is located and corrected. Critical Components All components identified with the IEC symbol in the parts list and schematic diagram designate components in which safety can be of special significance when replacing identified with. Use only the replacement parts designated in the parts list or parts with the same rating of resistance, wattage or voltage. SAFETY INFORMATION List of Safety Components Requiring Exact Replacements Part Number/ Designator Description F1 093-105202-300 Line Fuse Slo Blo 2.0A 5x20mm 083-041802-009 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. PT1 042-010053-003 Power Transformer. Use only factory replacement. BR1 052-400080-000 Bridge diode. Use only factory replacement. C6,8 034-330780-300 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 to internal cabinet pressure and vibration. 063-531808-000 Rear Amp Cover Use only factory replacement Inductor 043-560200-000 L1 - Use only factory replacement Inductor 043-300101-000 L2 - Use only factory replacement Inductor 043-700101-000 L3 - Use only factory replacement Inductor 043-324300-000 L4 - Use only factory replacement E250P/P12SW subwoofers E250P/P12SW subwoofers 收音机爱好者资料库 Ra d i o Fa n s .CN 15 3 14 2 4 E250P Packaging 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 1 3 15 3 2 4 Packaging P12SW 6 Ref# Part Number Description Qty 1 361803-001 P12SW Owners 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 JBL E250P/P12SW Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotes US 120vac/60HzYes108-132120VrmsNormal Operation EU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS required ParameterSpecificationUnit QA Test LimitsConditionsNotes Amp Section Type (Class AB, D, other)Dn/an/a Load Impedance (speaker)5.6Ohmsn/aNominal Rated Output Power (120VAC150Watts140Domestic version only 120 VAC-60 Hz Rated Output Power (230VAC150Watts130EU Version only 230 VAC-50 Hz AVG RMS Dynamic Power250Watts225 Average RMS power, 3/20 Cycles 50 Hz, Driven 6dB above its input sensitivity sensitivity THD Rated Power0.3%122k filter145 Watts THD 1 Watt0.1%0.522k filter DC Offset10mV-DC30 Speaker Outputs Damping factor50DF35Measured at amplifier board Measured at the speaker cable. 150 Watts THD 4.7Kohmsn/aNominal Filters LP filter 4th order fixed60-180 Hz 102nd order variable + 2nd order fix-24 db/Octave Subsonic filter (HPF) 3rd OrdeFixed LFE Low pass 2nd order200LP T 1M (NO LOAD) Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read 10k Resistance from V+ (C6 P+) to S+ (SPK O/P) should read 1M Resistance from V- (C8 P-) to S+ (SPK O/P) should read 1M 2. Power UpLED RED With a 5mV signal to Low level input, LED should change to GREEN -Voltage measurements (DVM) OP AMP LEDP-U4(1)P-U4(7) RED0Vrms11.84VDC GREEN7.13Vrms-12.93VDC 3. D.C. Operation -Voltage measurements (DVM) on CLASS D POWER AMP BetweenV+Q4(E)Q1(C)Q10(C)U7(1)U7(2)U7(4)U7(6)U7(7)U7(8) And This Point GNDV-GNDGNDGNDGNDGNDGNDGNDGND Get this Reading 71.7V0V-71.7V0V-71.7V-71.5V-71.2V0V0V4.65V 4. Check Switching Frequency Oscilloscope - USE THE PROBE TIP TO U6(7) TO GND Reading 100kHz +/-10%,24Vp-p B. Pre Amp Section Line Level Input Sensitivity -Set upTurn level, XOVER FREQ POT Fully CW and LFE switch off Generator Set at 200mV50Hz Signal to Line level input DETAILED TROUBLESHOOTING 17 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s - Voltage measurements OP AMP U2(1)U2(14)U2(8)U3(7)U3(1)U3(14)U3(8)U5(7)U5(1) SPEAKER O/P 306.9mV461mV460mV658mV628mV598mV2.326V2.02V3.57V23.33V 2. High Level Input Sensitivity -Set upTurn level, XOVER FREQ POT Fully CW and LFE switch off Set Generator at 1.3V50Hz Signal to High level input -Voltage measurements 15.3V at speaker output 3. Low- Pass -Set upSet Generator at 200 mV100Hz Signal to Line level input Measure voltage at S+ speaker output -Voltage measurement XOVER FREQ. SettingOutput CW14.03V CCW4.8V 4. LFE -Set upSet Generator at 200mV200Hz Signal to Line level input Measure voltage at S+ speaker output LFE switch SettingOutput Normal6V LFE18.32V See flow chart next page for diagnostics. DETAILED TROUBLESHOOTING (CONTD) 18 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s 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 on) no no yes yes no no yes yes no no yes yes no no yes yes START Check +/- 15V- MOD +/- 15V voltage at U 6(8),U6(4) Discharge C37, Check fuse transformer, L4, rectifier, C6 and C8 Use scope to check switching frequency U6(7) 100KHz +/- 10% , 24Vp- p Check Q4(E) TO V- = 0V D.C. Power up with no signal input LED RED OK OK OK OK OK OK OK OK Check MUTE(+8V) and Q24,Q25,Q26 Use scope to check O/P U7(6) and GND 143Vp- p square wave shown Check L2,L3,C71,C72, C73,C74 I/P:10mv/50HZ Check +15V/SW Q4(E) TO V- 15V Replace Q18,Q22 CLASS D AMP OK END Check U7,Q16,Q17, Q20,Q21,R87, D26,D35,C64 Check FB1,FB2,C45, C50,C60,C63, R81,R82 Check U7(1) = - 58.3V Check MUTE(- 12.9V), And Q24,Q25,Q26 Resistance check (no load) between V+ V- , V+ O/P,V- O/P and O/P to GND is 10K DETAILED TROUBLESHOOTING (CONTD) FLOW CHART 19 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s 20 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s 21 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s 22 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s 23 E250PE250P/ /P P12S12SWW susubwobwoo of fe er rs s E250P/P12SW (120v) Electrical Parts List Part NumberDescriptionReference DesignatorQty Resistors 020-220497-120Carbon Film2K2 1/4W J R111 021-100401-120MOF Resistor 1K 1W J R1031 021-120403-020MOF Resistor1K2 3WS J 8x20R91 021-120405-020MOF Resistor1K2 5WS J 8x25 R61 021-220202-120MOF Resistor22R 2W(S) J MB TYPE 15x8R101 022-500003-020KNP Resistor0R05 3WS J FK TYPER1041 024-000098-120SMD Resistor0R 1/8W J 0805 R125,1262 024-100298-120SMD Resistor10R 1/8W J 0805 R81,822 024-100398-120SMD Resistor100R 1/8W J 0805 R621 024-100498-120SMD Resistor1K 1/8W J 0805 R79,83,92,95,96,105,108,127,659 024-100598-120SMD Resistor10K 1/8W J 0805 R2,17,19,37,54,58,63,71,8 024-100698-120SMD Resistor100K 1/8W J 0805 R3,112,22-256 024-110598-100SMD Resistor11K 1/8W F 0805 R981 024-120698-120SMD Resistor120K 1/8W J 0805 R391 024-121598-100SMD Resistor12K1 1/8W F 0805 R381 024-137698-100SMD Resistor137K 1/8W F 0805 R321 024-150498-120SMD Resistor1K5 1/8W J 0805 R67,682 024-180598-120SMD Resistor18K 1/8W J 0805 R291 024-187698-100SMD Resistor187K 1/8W F 0805 R451 024-200598-120SMD Resistor20K 1/8W J 0805 R941 024-220398-120SMD Resistor220R 1/8W J 0805 R901 024-220498-121SMD Resistor2K2 1/8W J 0805 R1,87,613 024-220598-120SMD Resistor22K 1/8W J 0805 R1181 024-220798-120SMD Resistor2M2 1/8W J 0805 R80,1212 024-237598-120SMD Resistor23K7 1/8W F 0805 R481 024-243698-100SMD Resistor243K 1/8W F 0805 R361 024-270498-120SMD Resistor2K7 1/8W J 0805 R73,642 024-300398-120SMD Resistor300R 1/8W J 0805 R551 024-300598-120SMD Resistor30K 1/8W J 0805 R561 024-330498-120SMD Resistor3K3 1/8W J 0805 R7,8,12-15,597 024-330598-120SMD Resistor33K 1/8W J 0805 R4,52 024-332498-100SMD Resistor3K32 1/8W F 0805 R26,27,2 024-360498-120SMD Resistor3K6 1/8W J 0805 R281 024-390498-120SMD Resistor3K9 1/8W J 0805 R931 024-390598-120SMD Resistor39K 1/8W J 0805 R771 024-430498-100SMD Resistor4K3 1/8W F 0805 R781 024-453598-100SMD Resistor45K3 1/8W F 0805 R301 024-470298-120SMD Resistor47R 1/8W J 0805 R101,1022 024-470398-120SMD Resistor470R 1/8W J 0805 R76,99,1003 024-470498-120SMD Resistor4K7 1/8W J 0805 R85,862 024-470598-120SMD Resistor47K 1/8W J 0805 R44,47,49,1074 24 E250P/P12SW subwoofers E250P/P12SW subwoofers Part NumberDescriptionReference DesignatorQty 024-470698-120SMD Resistor470K 1/8W J 0805 R701 024-470798-120SMD Resistor4M7 1/8W J 0805 R601 024-487498-100SMD Resistor4K87 1/8W F 0805 R51,532 024-510398-120SMD Resistor510R 1/8W J 0805 R571 024-560598-120SMD Resistor56K 1/8W J 0805 R1221 024-620398-100SMD Resistor620R 1/8W F 0805 R16,182 024-680498-120SMD Resistor6K8 1/8W J 0805 R46,91,40,41,43,426 024-680598-120SMD Resistor68K 1/8W J 0805 R33,34,31,50,52,666 024-820598-120SMD Resistor82K 1/8W J 0805 R691 025-010300-000ThermisterTSE-103 K L:50mm1 026-200595-269Freq Pot 20KPN:RD163121R03D-20KBx2(EJ)VR21 026-500495-252Level Pot 5KPN:RK163111R52B-5KA (EJ)VR11 Capacitors 031-100244-100Ceramic Capacitor0u01/50V K 0805 X7R C33,45,51,66,67,5,107 031-100343-100SMD Capacitor100pF/50V J 0805 NPO C36,58,163 031-100344-100SMD Capacitor0u1/50V K 0805 X7R C11,42-44,46-49,52,54,55,60,63,71,74,7716 031-100384-100RSMD Capacitor0u1/250V K 1206 X7R C3,72 031-220344-100SMD Capacitor220pF/50V J 0805 NPO C20,21,19,14,155 031-330444-300SMD Capacitor3300pF/50V K 0805 X7R C40,342 031-470244-102SMD Capacitor0u047/50V K 0805 X7R C62,592 031-560243-100SMD Capacitor56pF/50V J 0805 NPO C57,612 031-560343-102SMD Capacitor560pF/50V J 0805 NPO C561 032-100484-200Mylar Capacitor1uF/250V K P:15C70,C70B2 033-470444-270NPE Capacitor4u7/50V K10 (R)8x13 SBEC731 033-680464-270NPE Capacitor6u8/100V K10 (R)1020 GNEC721 034-100525-300Electrolytic Capacitor10uF/25V M (R)0511 P:5 C351 034-100625-300Electrolytic Capacitor100uF/25V M (R)6.3x11 P:5C641 034-220525-301Electrolytic Capacitor22uF/25V M (R)5x11 P:5 C4,9,41,39,50,536 034-220615-301Electrolytic Capacitor220uF/16V M (R)0611 P:5C371 034-330525-300Electrolytic Capacitor33uF/25V M (R)0511 P:5C11 034-330615-300Electrolytic Capacitor330uF/16V M (R)0812 P:5 C12,782 034-330780-300Electrolytic Capacitor3300uF/80V M (R)22x48C6,82 034-470415-301Electrolytic Capacitor4u7/50V M (R)0511 P:5 C21 034-470615-301Electrolytic Capacitor470uF/16V M (R)0812 P:5 C65 (See service bulletin)1 038-100363-300MPE Capacitor0u1/100V J C68,69,26,27,28,29,307 038-150393-300MPE Capacitor0u15/63V J C251 038-330393-300MPE Capacitor0u33/63V J C311 03