JBL-ARCSUB10-pwr-sm 维修电路原理图.pdf

JBL Consumer Products Inc.250 Crossways Park DriveWoodbury, N.Y. 117971-800-336-4JBL in the USAA Harman International CompanyRev A 10/2000ARC SUB10/DS-10Powered SubwooferSERVICE MANUALRadioFans.CN 收音机爱 好者资料库SAFETY INFORMATIONWarningAny person performing service of this unit will be exposed tohazardous voltages and the risk of electric shock.It isassumed that any person who removes the amplifier fromthis cabinet has been properly trained in protecting againstavoidable injury and shock.Therefore, any serviceprocedures are to be performed by qualifiedservicepersonnel ONLY!CautionThis unit does not have a power switch. Hazardousvoltages are present within the unit whenever it isplugged in.Before the amplifier is plugged in, be sure its rated voltagecorresponds to the voltage of the AC power source to beused.Incorrect voltage could cause damage to theamplifier when the AC power cord is plugged in. Do notexceed rated voltage by more than 10%: operation below90% of rated voltage will cause poor performance or mayshut the unit off.Leakage/Resistance CheckBefore returning the unit to the customer, perform a leakageor resistance test as follows:Leakage Current. Note there is no power switch on this unit.When the power plug is plugged in, the unit is live. Connectthe unit to its rated power source. Using an ammeter,measure the current between the neutral side of the ACsupply and chassis ground of the unit under test. if leakagecurrent exceeds 0.5mA, the unit is defective. Reverse thepolarity of the AC supply and repeat.Resistance. Measure the resistance from either side of theline cord to chassis ground. If it is less than 500k ohms, theunit is defective.WARNING! DO NOT return the unit to the customer if it failsone of these tests until the problem is located and corrected.Critical ComponentsAll components identified with the IEC symbolin the parts list and the schematic diagramdesignate components in which safety can beof special significance when replacing acomponent identified with. Use only thereplacement parts designated in the parts list or parts withthe same rating of resistance, wattage or voltage.List of Safety Components RequiringExact ReplacementsF1Fuse SLO BLO 0.63A 250V T type.UL approvedPWRCORDSPT-2 or better with polarized plug, ULapproved wired with the hot side to fusedside. Use with factory replacement panelstrain relief only.TRXTransformer. Use only factory replacement.DBRBridge diode. Use only factory replacement.C1, 23300uF, 50V electrolytic filter caps. Be surereplacement part is at least the sameworking voltage and capacitance rating.Also the lead spacing is important.Incorrect spacing may cause prematurefailure due to internal cabinet pressure andvibration.C610uF 50V ?20% Elect. Radial NP Safety PartSee Page 15 Service BulletinR29470? 0.25W ?5% METAL OXIDE Safety PartS53AMIPower Amp module. Use only factoryreplacementCMC1mc4438 Safety PartL1mc4436 Safety Part2Amplifier/SubwooferARC SUB10/DS-10RadioFans.CN 收音机爱 好者资料库3Amplifier/SubwooferARC SUB10/DS-10TABLE OF CONTENTSSAFETY INFORMATION.2TABLE OF CONTENTS.3GENERAL SPECIFICATIONS.3DETAILED SPECIFICATIONS.4ARC SUB10/DS-10 CONTROLS ANDTHEIR FUNCTION.6CAUTIONS AND WARNINGS.7ARC SUB10/DS-10 BLOCK DIAGRAM .9SPEAKER CONNECTIONS.10TROUBLESHOOTING .11ARC SUB10 / DS-10 TEST SET UP ANDPROCEDURE.12ARC SUB10 / DS-10 POWER AMPMODULE TESTING FLOW CHART.13SERVICE BULLETIN JBL9903 - APRIL 1999.14SERVICE BULLETIN JBL2000-01JANUARY 2000.15TROUBLESHOOTING TIPS AND SOLUTIONSTO COMMON SERVICE PROBLEMS.16CABINET EXPLODED VIEWS.17AMPLIFIER EXPLODED VIEW.18ARC SUB10/DS-10 PACKING EXPLODED VIEWS.19ARC SUB10 Version 5 PCB.20ARC SUB10/DS-10 Version 5.1 PCB.21ARC SUB10/DS-10 ELECTRICAL PARTS LIST .22ARC SUB10/DS-10 INTEGRATED CIRCUITS &TRANSISTORS.23ARC SUB10/DS-10 SCHEMATIC.24GENERAL SPECIFICATIONSAmplifier Power (RMS). . . . . . . . 100 wattsDriver 10 . . . . . . . . . . . . . . High-Polymer LaminateInputs . . . . . . . . . . . . . . . . Line Level and Speaker LevelOutputs . . . . . . . . . . . . . . . Speaker Level (only active if Speaker Level Inputs are used)High-Pass Frequency . . . . . . . . . High-Pass filter at 180Hz (only active if Speaker Level Inputs are used)Frequency Response . . . . . . . . . 50Hz - 150Hz(determined by crossover setting)ARC SUB10DS-10Dimensions (H x W x D). . . . . . . . 11-1/2 x 17-1/8 x 16-1/214-1/4 x 14-1/4 x 16(292 X 435 X 419mm)(362 x 362 x 406mm)Weight. . . . . . . . . . . . . . . . 27 lbs/12.3 kg27 lbs/12.3kgDETAILED SPECIFICATIONSLINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotesUS 120vac/60HzYes108-132120VrmsNormal OperationEU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS requiredParameterSpecificationUnitQA TestLimitsConditionsNotesAmp SectionType (Class AB, D,other)Dn/an/aClass D Preferred.Sink required for ClassABLoadImpedance(speaker)4Ohmsn/aNominalZ-curve requiredRated Output Power100Watts1 input drivenPeak powerTHD Rated (RMS)Power0.3%122k filter50 WattsTHD 1 Watt0.1%0.522k filterDC Offset10mV-DC20 Speaker OutputsDamping factor50DF40Measured at amplifier boardMeasureatampboardTHD T T 100M? .B) Hi-Pot TestIf a UL approved Hi-Pot tester is available, testline & neutral of AC cord to outer shell of RCAjack (chassis) at 1100VAC for 2 seconds.Observe all of instrument manufacturersinstructions and safety warnings in performingthis test.Connect subwoofer system to a music source. Play at highlevel while checking for air leaks around panel edge, driver,panel jacks and controls, and voice coil problems such asrubbing or loose turns. With the crossover frequency setto 50Hz, very little of the voice content should be heard.4. REASSEMBLYFollow all disassembly instructions in reverse order. If theinput plate has been removed, it must be re-sealed with asmall bead of silicon seal or air leaks may result.8Amplifier/SubwooferARC SUB10/DS-10ARC SUB10/DS-10 BLOCK DIAGRAM9Amplifier/SubwooferARC SUB10/DS-10SummingCircuitVolumeControlEqualizationWaveformRecovery andFixed Low PassCrossoverControlPowerAmplifierShort CircuitProtectionWooferLRSPKRInSPKROutHigh LevelInputLow Level InRLLow LevelInputEEDDCCBBAA77665544332211SPEAKER CONNECTIONSLine LevelNote: Some receivers/amplifiers havea single (mono) subwoofer output. Inthis case, it is recommended that youuse a “Y”-connector (not included) toconnect to both right & left inputs andmaximizethesubwoofersperformance.Speaker LevelNote: When using the speaker-levelconnections, the built-in high-passfilterwillalsolimitthelowfrequencies being sent to thesatellite speakers. This means thatyour satellites wont have to try toreproduce the information thesubwoofer is playing.10Amplifier/SubwooferARC SUB10/DS-10Min50Max150VolumeCrossoverFrequencyRRLLPowerSPKRINSPKROUTLowLevelInRIGHTLOUDSPEAKERLEFTLOUDSPEAKERMAIN SPEAKER OUTPUTSUBWOOFER OUTLEFTLEFTRIGHTRIGHTRECEIVER/AMPLIFIERMin50Max150VolumeCrossoverFrequencyRRLLPowerSPKRINSPKROUTLowLevelInRIGHTLOUDSPEAKERLEFTLOUDSPEAKERMAIN SPEAKER OUTPUTLEFTRIGHTRECEIVER/AMPLIFIERNote: DS-10 controls are shown hereTROUBLESHOOTINGIf you used the high-level (speaker) inputs andthere is no sound from any of the speakers, checkthe following:?Receiver/amplifier is on and a source is playing.?Powered subwoofer is plugged in.?Check all wires and connections betweenreceiver/amplifier and speakers. Make sure all wiresare connected. Make sure none of the speakerwires are frayed, cut or punctured.?Review proper operation of your receiver/amplifier.If there is low bass output, check the following:?Make sure the connections to the left and right“Speaker Inputs” have the correct polarity (+ and ).?Make sure that the subwoofer is plugged into anactive electrical outlet.?Adjust the crossover point.?If you are using a Dolby* Digital/DTS?receiver orprocessor, make sure that the subwooferadjustments on the receiver/processor are set upcorrectly.?Slowly turn the level Control clockwise until youbegin to hear the desired amount of bass.If you used the line-level inputs and there is nosound from the subwoofer, check the following:?Receiver/amplifier is on and a source is playing.?Powered subwoofer is plugged in.?Check all wires and connections between receiver/amplifier and subwoofer. Make sure all wires areconnected. Make sure none of the wires are frayed,cut or punctured.?Review proper operation of your receiver/amplifier.11Amplifier/SubwooferARC SUB10/DS-10General FunctionUUT = Unit Under Test1.Connect both right and left line level inputs (RCA) to signal generator and UUT. Use Y-cable if necessary frommono source. VOLUME control should be full counterclockwise.2.Turn on generator, adjust to 50mV, 50 Hz.3.Plug in UUT; red LED should be ON. Turn VOLUME control full clockwise.4.LED should turn Green; immediate bass response should be heard and felt from port tube opening.5.Turn off generator, turn VOLUME control fully counterclockwise, disconnect RCA cables.6.Connect one pair of speaker cables to either high level input terminal on UUT. Cables should be connected toan integrated amplifier fed by the signal generator.7.Turn on generator and adjust so that speaker level output is 2.0V, 50 Hz. Turn VOLUME control full clockwise.8.Green LED should light, immediate bass response should be heard and felt from the port tube opening.Sweep Function1.Follow steps 1-4 above, using a sweep generator as a signal source.2.Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or anyother noises. If any unusual noises are heard, remove driver and test.Driver Function1.Remove driver from cabinet; detach + and - wire clips.2.Check DC resistance of driver; it should be 3.2 to 3.9 ohms.3.Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier fed bya signal generator and adjust so that speaker level output is 5.0V.4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises.12Amplifier/SubwooferARC SUB10/DS-10ARC SUB10 / DS-10 TEST SET UP AND PROCEDUREAMPLIFIERCD PLAYERPRE AMPAC VOLT METER ( 6V )ARC SUB10 / DS-10UNDER TESTLINE LEVELSPEAKER LEVELMin50Max150VolumeCrossoverFrequencyRRLLPowerSPKRINSPKROUTLowLevelInFROM LINE-LEVELSOURCESPEAKER OUTPUTFROM AMPLIFIER13Amplifier/SubwooferARC SUB10/DS-10ARC SUB10 / DS-10 POWER AMP MODULE TESTING FLOW CHART No Yes No Yes No Yes No Yes No No Yes YesH No Yes No YesSTARTCheck V+,V-, +/-15V voltage tomoduleCheck fusetransformer,CMC,rectifier, C1,C2Checkswitchingfrequency100KHz +/-10%1VppCheck I/P ofmodule toGND 0V D.C.Power up withno signal I/PLED REDOKOKOKOKOKOKOKOKCheck C12and Pre-AMPCheck O/P tomodule for80Vpp squarewavemeasure toGNDCheck L1,L2, C6, C24Check 6V tomodulemeasure to V-ReplaceModulePower AMPOKENDCheck D1,R1, Q3, Q4,Q5 and SCPChecktransformer,CMC,rectifier, C1,C2, D9, D10,R16, R17Check S/Dvoltage tomodule (5V)measure to V-Check D6,R9, R46Resistancecheckbetween V+V- and O/PO/P to GNDshould 5KSERVICE BULLETIN JBL9903 - APRIL 1999To all JBL Service CentersThis considered a Minor repairModel: ARC SUB10 / DS-10Subject: Check Solder Joints in Event of FailureSome performance related complaints in the ARC SUB10 / DS-10 powered subwoofer may be caused by coldSolder connections between the 28 pins of the Power Amp Module and the main circuit board. Whentroubleshooting, failure to check these joints can result in erroneous conclusions or wasted time.In the event you receive a ARC SUB10 / DS-10 Subwoofer with the complaints “Dead, or No Output, orMotorboating (Oscillation)”, perform the steps listed below first before any further troubleshooting takesplace:1)Unplug all cables, lay the subwoofer on a padded surface.2)Remove all Philips screws around the outer perimeter of the amplifier faceplate.3)Remove amplifier assembly; you should be able to remove the amplifier far enough out of the cabinet toservice it without removing the woofer wires.4)Locate the Power Amp Module; it is the large gray component with a metal case. On the Solder side of thecircuit board are the 28 Solder connections to the Module.5)Regardless of whether you can visibly see breaks in any of the connections or not, carefully re-Solder all 28pin connections, adding 60/40 rosin core Solder. Take care not “bridge” any connections on the board withSolder.6)Inspect the Solder joints to the main filter capacitors C1 and C2 on the main PCB and re-Solder if needed.7)Replace the amplifier assembly back into the cabinet; replace the screws.8)Test the unit by applying a signal from a music source, adjust the volume to a moderate level and confirm theoriginal problem has been corrected.14Amplifier/SubwooferARC SUB10/DS-10SERVICE BULLETIN JBL2000-01 - JANUARY 2000To all JBL Service CentersWarranty labor rate: MINOR repairModel: ARC SUB10 / DS-10Subject: Failure of C6In the event you receive a JBL subwoofer corresponding to one of the above models with the complaint “no output” andcapacitor C6 (10uf 50v NPE) is damaged in the amplifier, replace with the following part: JBL part# 30712 (10uf 100v NPE)General reference for location only; not all parts or designators may conform to these drawingsIt is also recommended following the repair that the instructions included in bulletin #JBL9903 are followed.ModelsSerial number 120/230VStatusActionARC SUB10 / DS-10All serial numbers affectedReplace if damagedReplace C6 with JBL part# 3071215Amplifier/SubwooferARC SUB10/DS-10TROUBLESHOOTING TIPS AND SOLUTIONS TO COMMON SERVICE PROBLEMSFor models: ARC SUB 8, ARC SUB 10TIP# JBLTT2000-01Complaint:How do you replace or service any of the front panel components on the Subwoofer faceplate for model ARCSUB 10 ?Probable Cause:The High level Input terminals, potentiometers, RCA jack, and switch(es) are behind a sealed cover to protect theair-tight integrity of the cabinet enclosure.Solution:1)Unplug all external cables from the subwoofer; place the cabinet on a padded surface.2)Remove any subwoofer grille; remove the woofer from the cabinet. Detach the two connections from thewoofer terminals.3)Remove all Phillips screws holding the amplifier to the cabinet; remove the amplifier.4)Remove all knobs, nuts, and Philips screws from the outer control section of the amplifier faceplate.5)Locate the sealed cover on the inside of the amplifier faceplate (see illustration); the bead of adherent mustbe broken to remove the main PCB with front panel components from the plastic faceplate. This is mosteasily accomplished by CAREFULLY using a box cutter, exacto knife, or similar sharp instrument. First scrapeall excess material from the three surfaces; then force the blade into the groove between the rear cover andthe faceplate. DO NOT attempt to remove the rear cover from the main PCB.6)When enough material is removed, the main PCB with cover can be pulled away from the faceplate,exposing the components.7)After servicing, a bead of “silicon seal” or similar adherent must be applied to all surfaces where it wasremoved. Reassemble the rest of the components in reverse order.16Amplifier/SubwooferARC SUB10/DS-1017Amplifier