Proel Hp-x series User manual

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ServiceManual

HPXSeries

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ApplicableModels:

HPX4600

HPX6000

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TableofContents

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1SafetyInstructions............................................................................................................................................... 3

2TechnicalSpecification ........................................................................................................................................ 4

3BlockDiagram...................................................................................................................................................... 5

4SignalFlowchart .................................................................................................................................................. 6

5MalfunctionAnalysisonSMPS(PowerSupply)................................................................................................... 7

6MalfunctionAnalysisonInputModule ............................................................................................................. 12

7MalfunctionAnalysisonDisplayModule .......................................................................................................... 13

8MalfunctionAnalysisonPre‐AmplifierModule ................................................................................................ 14

9MalfunctionAnalysisonProtectionModule..................................................................................................... 16

10MalfunctionAnalysisonPowerOutputStageModule................................................................................... 17

11SpecialNotes ................................................................................................................................................... 18

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1SafetyInstructions

1.1Duetohighvoltageinternal,pleasebecarefulduringtroubleshootingandmaintenancecourse.

Pleasereadtheusermanualandthismaintenancemanualfirst.

1.2Duetothewrongoperationincheckingandrepairingcoursewillresultstoruineddamageonsomeparts,sopleaseoperate

followthismanual.

1.3ThemaintenancepersonmustbeONLYaqualifiedprofessionalpersonnelauthorizedbyPROEL.

1.4Don’treplacethekeydevicesandadjusttheadjustablepotentiometersbyyourself,itwillchangetheparameterofthe

equipment.

1.5Pleasecutoffthepowertoguaranteethesafetyoftheservicepersonwhenrepairing.

1.6Thedevicesmarked  inthedrawingindicatesakeydevice,pleasereplaceitONLYwithasparepartspecifiedbyPROEL.

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2TechnicalSpecification

MODELHPX4600HPX6000

Power8ohm*850W1200W

Power4ohm*1400W2000W

Power2ohm**2300W3000W

PowerBRIDGE8ohm*3000W4100W

PowerBRIDGE4ohm**4600W6000W

OutputStageClass3H

Frequencyresponse(+0/‐0.5dB)20Hz‐20KHz

InputSensitivity(selectable)0.775Vrms(0dBu)/1.0Vrms(0dBV)/32dB(fixedGAIN)

InputConnectors/ImpedanceXLRM(withXLRFLINK),20Kohm(balanced),10Kohm

(unbalanced)

OutputConnectorsSPEAKONandBindingPost

DampingFactor>200

SlewRate>20V/uS

S/NRatio(unweighted)>90dB

THD+N<0.1%

ControlsINPUTLEVEL,INPUTSENSITIVITY,STEREO/BRIDGE/PARALLEL,SOFT

CLIPPING

LEDIndicatorsPOWER,ON,PARALLEL,BRIDGE,SIGNAL,LIMIT,PROTECT

CoolingVariablespeedDCfan

ProtectionsAClowpower,DC,thermal,shortcircuit,VHF,CLIPlimiter,SOFT

CLIPlimiter

MainsSupplyVoltage230VAC(±10%)50/60Hzor120VAC(±10%)50/60Hz

MaximumConsumption2330VA3320VA

RatedConsumption***620VA830VA

StandbyConsumption5VA6VA

Dimensions(WxHxD)483x89x505mm19"x3.5"x19.9"(2Urack)

Weight13Kg(28.7lb)13,6Kg(29.9lb)

*RMSbothchannelTHD<1%

**40msburst

***Ratedconsumptionismeasuredwithpinknoisewithacrestfactorof12dB,thiscanbeconsidered

astandardmusicprogram.

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3BlockDiagram

3.1HPX4600/HPX6000BlockDiagram:

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4SignalFlowchart

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5MalfunctionAnalysisonSMPS(PowerSupply)

5.1CircuitDiagramofAuxPowerSupplyModule:

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5.2MalfunctionAnalysisonAuxPowerSupplyModule:

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Sequence

No.

Circuitto

check

MostProbablyFailures

1

AuxPower

Supply

Board

STYLEDisoff;theequipmentisunavailabletostart.

‐Checkthecircuit,seeiftheCN1pinandthecopperfoilofAuxPower

Supplyisbroken;Whenamplifierconnectstopowersupply,theAux

PowerSupply(self‐activatedswitch)willstarttowork,itprovidestwo

groupstandbypowersupply+5V&+16V.Amongthem,CN3/+5Visfor

poweron/offled(orange),CN1/12foot/+16Visforthemainpower

controlboard,themainpoweron/offiscontrolledbytheCN4/(1)(3)in

plug.WhentheCN4/(1)(3)isclosed,OP3/817willbeconnected,

Q2/8050willbedownedtolowlevel(VPI).

RepairingGuide:Whenrepairingthepowerboard,pleasecuttheDC/300Vfuse,seriesconnecta

100W—200Wlamptostartthemachine,preventingthedamageofrelateddevicewhenrepairing.

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5.3CircuitDiagramofSMPSControlModule:

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5.4MalfunctionAnalysisonSMPSControlModule:

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Sequence

No.

Circuit

Function

Failure

1SMPSControl

‐Theequipmentisunavailabletostart;

‐Protectionfunctionwillbeactivatedwheninlowimpedanceoutput;

‐Cyclicprotectionoftheswitchpower;

‐Delaystart,over‐voltagePROT,low‐voltagePROTandovercurrent

PROT.

RepairingGuide:

1)Whenrepairingthecontrolboard,youcancuteveryprotectcircuitgraduallyfoundthedefective

area!

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5.5CircuitDiagramofEMCModule:

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5.6MalfunctionAnalysisonEMCModule:

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Sequence

No.

Circuit

Function

Failure

1LineFilter

‐RestrictiononEMIandRFITheequipmentisunavailableto

start‐up,theACfuseoftherearpanelisburntwhenconnectedthe

electricitychecktheRT1componentandseeifthereisshortcircuit.

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5.7CircuitDiagramofLowVoltagecontrolcircuit:

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5.8MalfunctionAnalysisonLowVoltagecontrolcircuit:

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Sequence

No.

Circuit

Function

Failure

1Low‐voltage

Control

‐Theequipmentcannotbestarted:LM2596zenerwilloutput

‐onegroup+24V,providedpowersupplyfortherelay,fansand

LEDonfrontpanel.Amplifierprotection:±15Vpowersupplyis

abnormal.Fansarestopped,quickorslowworking.Soft‐start

resistorisburntonpowersupply.

‐Connectingthejumperof110VandACIport,thedoublevoltage

rectifierwillletthecircuitworkwith110Vand120Vmainsvoltage.

RepairingGuide:

Equipmentcannotbestarted,buttheLEDoncontrolboardisnormal.Pleasecheckifthe+24V

powersupplyofCN6connectorisnormalornot.

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5.9CircuitDiagramofSMPSPSUModule:

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5.10MalfunctionAnalysisonSMPSPSUModule:

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Sequence

No.

Circuit

Function

Failure

1

Soft‐start/

Rectifier

Filter

‐Smokecomesoutbutstillworkswhenpoweroutput,focusto

checkwhethertherelaydoesnotpull‐inresultsNPTR1,NPTR2

thermistorburntduetoover‐current;

‐Connectthejumperof110VandACIporttoformthevoltage

doublingrectifyingcircuit,thenitcanworkin110Vand120Vvoltage

program;

‐Rectifiedfiltercircuitshort‐circuitandcauseburntoftheACinput

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fuse;

2LLCresonant

converter

‐K1/85°cthermalswitchisoftenclosedresulttothestart‐up

unavailable;

‐High‐currentwhilestart‐uptheequipment,causetheburntoutof

theprimarysideF1/DC/300Vfuse;

‐Switchingtransistorsdonotwork,checkthedrivingtransformerT2

(drivingwaveformpleaserefertothefigure1),theprimarycurrent

ofHFtransformerformedaloopthroughtheprimarysidecurrent

T3A,resonantinductanceL5andresonantcapacitor16(LLCresonant

converterZCSWaveformpleaserefertofigure2);

‐ChecktheprimarysidecurrentbyLF1currenttransformer,

abnormaloftherelatedcomponentswillresultsprotection;

3

FanSpeed

Control

Circuit

‐Fansdonotwork.

‐Fastrotating.

‐Itiseasilytogointoover‐heatprotectionifthefansdon’tspeed

upafterthemoduletemperatureincreasing.

4Rectifier

OutputCircuit

‐Rectifieroutputsthreemainvoltage(+Step1/‐Step1,

+Step2/‐Step2,+Step3/‐Step3),anyoneofthemshortcircuitwill

resultstopowersupplyprotectionwhenstart‐up.

‐Low‐voltagecontrolboardoutputs+24Vand±15Vsub‐voltage.

Alltheindicatorsonfrontpaneldonotshinedif+24Vnooutput

(start‐upunavailable);±15Vpowersupplyabnormalwillcausepower

amplifierdistortionandprotection

Figure1DrivingWaveformFigure2LLCResonantConverterZCSWaveform

 

RepairingGuide:

1)WhenrepairingtheSMPSboard,pleasecuttheDC/300Vfuse,seriesconnecta100W—200W

lamptostartthemachine,preventingthedamageofrelateddevicewhenrepairing.

2)WhentheSMPScannotbestarted,repeatstheprotectionandrestart,pleasedisconnect+

VCC,‐VCCthentrytostart,ifitisnormal,itmeansshort‐circuitinamplifiedpart,checkthe

amplifiedcircuit,otherwiseitisthefailureofSMPS;

3)Powersupplyprotectionmeans–alltheindicatorlightsonthepanellitandthenimmediately

blackout;

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6MalfunctionAnalysisonInputModule

6.1CircuitDiagramofInputModule:

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6.2MalfunctionAnalysisonInputModule:

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Sequence

No.

CircuitFunctionFailure

1

Stereo/Parallel

/BridgeSwitch

Circuit

‐Poorconnectionoftwo‐wayswitchSW2(4‐3)ornotlocatedatthe

rightpositionwillcauseparallelorbridgeindicatordoesnotshine,

thatcannotfunctiononandoff.

‐Parallelindicatordoesnotshine,poorconnectionofD10,R56,Q9;

‐Bridgeindicatordoesnotshine,poorcontactofD9,R52,Q6,Q7;

2

Photoelectric

Volume

ControlCircuit

‐LinearopticalcouplerL3orL5isdamaged,nosoundinCH1orCH2;

‐LinearopticalcouplerL2orL6isdamaged,soundleakinginCH1or

CH2;

3SoftClip

Circuit

‐Poorcontactoftwo‐wayswitchSW2(2‐1)ornotlocatedattheright

positionwillcausenosoftclipinCH1orCH2;

‐AbnormalofsoftclipcircuitformedbyQ1,Q2,Q3,Q4willcause

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distortionofwaveform.

4Sensitivity

SwitchCircuit

‐Poorcontactoftwo‐wayswitchSW2(4‐3)ornotlocatedattheright

positionwillcauseabnormalofCH1’ssensitivity;

‐Poorcontactoftwo‐wayswitchSW2(2‐1)ornotlocatedattheright

positionwillcauseabnormalofCH2’ssensitivity.

5ClipLimit

Circuit

‐DamageofL1,L4linearopticalcouplerwillcausenocliplimitinCH1

orCH2;

‐Thereisbigsignaloutputeveniftheamplifieralreadyover‐heat

protection‐VR1/VR2arenotinthebestresistancevalue;

6±15VPower

Supply

‐+15Vor‐15Vpowersupplyimbalancewillcauseseriousdistortionof

thevoice,andpoweramplifierprotectionetc.;

RepairGuidelines:

1)Thereisstilllargesignaloutputwheninprotectioncircuit,increasethevolumeandthesignal

sourceandthendetecttheoutputwaveformbyopeningoscilloscopeormultimeter,adjusttheoutput

waveformtominimumthroughVR1/VR2whentheamplifierstartself‐protection.

Note:DebuggingmustbedonebeforetheprotectionLEDisoff,youcanrepeatthedebuggingin

interval.



7MalfunctionAnalysisonDisplayModule

7.1CircuitDiagramofDisplayModule:



14

7.1MalfunctiononDisplayModule:



Sequence

No.

Circuit

Function

Failure

1

Display

/Volume

Control

Board

‐CN4socketoff,no+24Vpowersupplywillcausestart‐up

unavailable;

‐PoorcontactofCN1/CN2socketwillcausethefanfastrotating

andindicatoroffinfrontpanel;

‐No+5VpowersupplyofU1/78L05willcausenosound;

RepairingGuide:

Cannotstart‐uptheequipment,buttheindicatoronthepowercontrol

boardisnormal.CheckwhethertheCN4socketof+24Vpowersupplyisnormalornot?



8MalfunctionAnalysisonPre‐AmplifierModule

8.1CircuitDiagramofPre‐ampModule:



15

8.2MalfunctionAnalysisonPre‐ampModule:



Sequence

No.

CircuitFunctionFailure

1

ClassAB

Power

Output

‐ThedamageofIC1/5532willresultstoDCoutputprotectionofthe

amplifier.

‐Abnormalof±15Vpowersupplywillcausebiasdifferenceor

amplifierprotection.

‐ThedamageofQ1,Q2voltageamplificationtransistorwillcause

highcurrent.

‐Amplifierself‐excitation:checkwhetherthedeviceofC6/220Pwas

turnedbad.

2Short‐circuit

Protection

‐Amplifieroutputshort‐circuitandnoprotection;

‐Start‐upprotection;

‐Theamplifierwillstartprotectioninsoftclipstatusifthecomponent

D15,U2/817damaged.

3ClipLimit

Circuit

‐Nocliplimit,checkiftheU1/817isdamaged.

‐Limitdelay.ChecktheD12,R30.

‐Waveformjitterwhenincliplimit,checkwhethertheQ5,Q6,Q7,

Q8,E3arenormalornot.

‐Novolumegraduallyincreasefunctions;

RepairingGuide:

1)Whenrepairingtheamplifier,pleaseseriesconnecta100W—200Wlamptostart‐uptheequipment

toavoidthedamageofrelateddevice;

2)ThecircuitofCH1andCH2isthesamebutthesequenceNo.ofdeviceisdifferent,allthetesting

parametercanbeshared;

3)Poweramplifierprotectionmeansthepowerandprotectionindicatorsonthefrontpanelarelit;



16

9MalfunctionAnalysisonProtectionModule

9.1CircuitDiagramofProtectionModule:



9.2MalfunctionAnalysisonProtectionModule:



Sequence

No.

CircuitFunctionFailure

1Indicator

DrivingCircuit

‐Indicatordrivingcircuitincludes:signalindicator,clippingindicator,

TEMPindicator,PROTindicatorandhigh‐frequencyindicator;

2

VHF/Over‐heat

Protectionand

DelayCircuit

‐ThedelaycircuitisacollectionofVHF,shortcircuit,over‐heat,

DC‐protection,aswellasstart‐updelay.Whentheprotectionfunction

andstart‐updelayareabnormalpleasecheckthiscircuit.

3DCProtection

Circuit

‐Nooutput‐relaydoesnotpull‐in.Firstcheckwhetheritisnormal

for24Vpowersupply,Q5andQ6isconnectedornot.

‐Poweron/offhasthesoundofshock‐alongpull‐inontherelay;

‐Q3,Q2,Q4,C6,R19,R18formapositiveandnegativeDCdetection

circuit,abnormalwillcauseDCprotectionandrelaydisconnected;

RepairingGuide:

1)ThecircuitofCH1andCH2isthesamebutthesequenceNo.ofdeviceisdifferent,allthetesting

parametercanbeshared;



17

10MalfunctionAnalysisonPowerOutputStageModule

10.1CircuitDiagramofPowerOutputStageModule:



18

10.2MalfunctionAnalysisonPowerOutputStageModule:



Sequence

No.

CircuitFunctionFailure

1ClassAB

PowerOutput

‐DamageofcomponentsC1,C2willresultsmoduleloading

self‐excitation.

‐VoltagebetweencomponentsQ3‐Q6andQ8‐Q11BEwillbedownto

0.3‐0.43;Ifthevoltageishigh,itwillresultinstaticcurrentraisedand

theburntoutofpowertransistors.Ifitislow,itwillcausecross‐over

distortion.

2

3HLogic

PowerSwitch

Circuit

‐Lowoutput/earlyClipping:Positiveornegativepowersupplyshould

notbeopened,withoutsecondsteppowersupply.

‐Theresistanceofamplifiedmoduleisheatingabnormally,positive/

negativepowertransistor(Q19,Q22)isconnectingorshortcircuitfor

longtime;

‐Theabnormalofhigh‐speedswitchingcomparator/LM311would

resultstosecondsteppowersupplycouldnotuseandlowoutput.

3Overload

ProtectCircuit

‐Outputshort‐circuitandnoprotect,causeburntthefuseonthe

module.

‐Start‐upprotect;

‐negative‐positivebiasofthepoweroutputtransistorisabnormal;

‐smalloutputloadcausedbyfalseoperationofoverload;

4ShortCircuit

Protect

‐theprotectionindicatorwillnotbeshinedwhentheamplifier

outputisshort‐circuit.

‐whensignalisincreased,theamplifierwillgointoprotection

function;

5Temperature

Degradation

‐Maloperationoftemperaturedegradationcircuit,LEDshined,

causedthe3Hswitchforcedtoreplace2Hlogicpowersupply,and

thatwillresultinsmallpoweroutput.

RepairingGuide:

1)Whenrepairingtheamplifier,pleaseseriesconnecta100W—200Wlamptostart‐uptheequipment

toavoidthedamageofrelateddevice;

2)ThecircuitofCH1andCH2isthesamebutthesequenceNo.ofdeviceisdifferent,allthetesting

parametercanbeshared;

3)Poweramplifierprotectionmeansthepowerandprotectionindicatorsonthefrontpanelarelit;

11SpecialNotes

11.1Nopriornoticeifanychangeonthesemodelshappened;

11.2Shouldanyproblemcannotbesolved,pleasecontactusorsendbackforrepairing;

11.3Pleasedonotreplacethekeydevicesthatwillinfluencetheperformanceofequipment.



19

notes

___________________________________________________________________________________________________________ 



20

notes

___________________________________________________________________________________________________________ 

PROEL HP-X series User manual

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