PROEL HP-X series User manual

1
ServiceManual
HPXSeries

ApplicableModels:
HPX900
HPX1200
HPX2400
HPX2800


2

TableofContents

1SafetyInstructions .................................................................................................................................................................. 3

2Technicalinformation ............................................................................................................................................................. 4

3BlockDiagram ......................................................................................................................................................................... 6

4SignalFlowchart...................................................................................................................................................................... 7

5HPX900MalfunctionAnalysisonPowerSupply ..................................................................................................................... 8

6HPX900MalfunctionAnalysisonAmplifiedPart .................................................................................................................... 10

7HPX1200/2400/2800MalfunctionAnalysisonAuxPowerSupplyBoard............................................................................... 12

8HPX1200/2400/2800MalfunctionAnalysisonDriving&ProtectionModuleCircuit............................................................. 13

9HPX1200MalfunctionAnalysisonSMPS ................................................................................................................................ 14

10HPX1200MalfunctionAnalysisonAmplifiedPart ................................................................................................................ 16

11HPX2400/2800MalfunctionAnalysisonSMPS..................................................................................................................... 18

12HPX2400/2800MalfunctionAnalysisonAmplifiedPart....................................................................................................... 20

13HPX900/1200/2400/2800InputBoard ................................................................................................................................. 22

14SpecialNotes......................................................................................................................................................................... 23

3
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.


4
TechnicalSpecification
MODEL HPX900 HPX1200 HPX2400 HPX2800
Power8ohm*200W 300W450W 600W
Power4ohm*300W 450W800W 1000W
Power2ohm** 450W 600W 1200W 1400W
PowerBRIDGE8ohm*400W 600W900W 1200W
PowerBRIDGE4ohm** 900W 1200W 2400W 2800W
OutputStage ClassAB ClassAB ClassHClassH
Frequencyresponse(+0/‐0.5d
B
20Hz‐20KHz 20Hz‐20KHz 20Hz‐20KHz 20Hz‐20KHz
InputSensitivity(nominal) +2.3dBu/1.0Vrms +1.0dBu/0.87Vrms +0.8dBu/0.85Vrms 0dBu/0.775Vrms
InputSensitivity(fixedgain) +8.3dBu/2.02Vrms +4.0dBu/1.23Vrms +5.8dBu/1.51Vrms +7.0dBu/1.73Vrms
GAIN(nominal/fixed) 32dB(40x)/26dB(20x) 35dB(56x)/32dB(40x) 37dB(71x)/32dB(40x) 39dB(89x)/32dB(40x)
InputConnectors XLRM,1/4"JACK,RCA XLRM,1/4"JACK,RCA XLRM,1/4"JACK,RCA XLRM,1/4"JACK,RCA
Impedance 20Kohm(balanced)
10Kohm(unbalanced)
20Kohm(balanced)
10Kohm(unbalanced)
20Kohm(balanced)
10Kohm(unbalanced)
20Kohm(balanced)
10Kohm(unbalanced)
OutputConnectors SPEAKONandBindingPost SPEAKONandBindingPost SPEAKONandBindingPost SPEAKONandBindingPost
DampingFactor >100 >100 >200 >200
SlewRate >20V/uS >20V/uS >20V/uS >20V/uS
S/NRatio(unweighted) >85dB >86dB >90dB >91dB
THD+N <0.1% <0.1% <0.1% <0.1%
Controls INPUTLEVEL,INPUTSENSITIVITY,
STEREO/BRIDGE/PARALLEL,
LOWPASSNOTCH(LPN),GND
INPUTLEVEL,INPUTSENSITIVITY,
STEREO/BRIDGE/PARALLEL,
LOWPASSNOTCH(LPN),GND
INPUTLEVEL,INPUTSENSITIVITY,
STEREO/BRIDGE/PARALLEL,
LOWPASSNOTCH(LPN),GND
INPUTLEVEL,INPUTSENSITIVITY,
STEREO/BRIDGE/PARALLEL,
LOWPASSNOTCH(LPN),GND
LEDIndicators POWER,ON,PARALLEL,
BRIDGE,
POWER,ON,PARALLEL,
BRIDGE,
POWER,ON,PARALLEL,
BRIDGE,
POWER,ON,PARALLEL,
BRIDGE,
Cooling VariablespeedDCfan VariablespeedDCfan VariablespeedDCfan VariablespeedDCfan
Protections AClowpower,DC,thermal,
shortcircuit,VHF,CLIPlimiter
AClowpower,DC,thermal,
shortcircuit,VHF,CLIPlimiter
AClowpower,DC,thermal,
shortcircuit,VHF,CLIPlimiter
AClowpower,DC,thermal,
shortcircuit,VHF,CLIPlimiter
MainsSupplyVoltage 230VAC(±10%)50/60Hzor
120VAC(±10%)50/60Hz
230VAC(±10%)50/60Hzor
120VAC(±10%)50/60Hz
230VAC(±10%)50/60Hzor
120VAC(±10%)50/60Hz
230VAC(±10%)50/60Hzor
120VAC(±10%)50/60Hz
MaximumConsumption 1450VA 1850VA 3550VA 4120VA
RatedConsumption*** 200VA 250VA 450VA 600VA
StandbyConsumption 50VA 65VA 65VA 65VA
Dimensions(WxHxD) 483x89x335mm
19"x3.5"x13.2"(2Urack)
483x89x395mm
19"x3.5"x15.6"(2Urack)
483x89x395mm
19"x3.5"x15.6"(2Urack)
483x89x395mm
19"x3.5"x15.6"(2Urack)
Weight 6Kg(13.2lb) 6.9Kg(15.2lb) 9.2Kg(20.3lb) 9.2Kg(20.3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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5
3BlockDiagram
3.1HPX900/HPX1200BlockDiagram:

VOL&DISPLA
Y
4
ACinput
1
ch1/ch2 input
3ch1/ch2 output
11
POWER
2
Protect-ch1
8Protect-ch2
9
Mode-ch1
6Mode-ch2
7
SMPSPOWER 5
TR 10
N
Prt Limt Clip S+15V GND-B TEMP Prt
Limt
Clip
S+15V
GND-B
TEMP
TR
8-24V
F1
T4A
L
GND GND
CH1output
CH2output
OUTPUT OUTPUT
+15V -15V gnd
ch1-input
ch2-input
+24V
GND-B
+24V
GND-B
+24V GND-B SIG SIG
+VCC
-VCC
-VCC +VCC
ch1vol
ch2 vol
prt
prt
clip
clip
sig
sig
parpllel
bripge
fan
passage
p
assa
g
e
passage
N
L
-VCC
+VCC


6
3.2HPX2400/HPX2800BlockDiagram:

VOL&DISPLAY
4
ACinput
1
Ch1/Ch2 input Ch1/Ch2 output
POWER
-
ON/OFF
2
Ch1-Protect Protect-ch2
9
Ch1-Mode Ch2-Mode
SMPSPOWER
5
N
Prt
Limt
Clip GND-B TR1
Clip
TR2
TR
8-24V
AC-FUSE
T12A/T15A
L
Ch1-GND
Ch1 output
Ch2-output
output output
+15V
-15V
gnd ch1-input
ch2-input
+24V
GND-B
+24V+24V
SIG SIG
+VCC
-VCC
-VCC+VCC
ch1vol
ch2 vol
prt
prt
clip
clip
sig
sig
parpllel
bripge
fan
N
L
-VCC+VCC
Ch2-GND
GND-B
+15V -15V gnd
Limt
Prt
GND-B
TR1 TR2
+15V
-15V
gnd
-VCC
fan
2KW-4.5KW


7
4SignalFlowchart


12
3
NON-INVERTED
I/P
XLR/F XLR/M
INVERTED
12
3
I/P
XLR/F XLR/M
INVERTED
OUTPUT OUTPUT
OUTPUT STAGE
AMP FRONT END
ATTENUATOR
PREAMP
PREAMP
CHANNEL 1
CHANNEL 2
BRIDGE PARALLEL STEREO
MODE SWITCH
ATTENUATOR
AMP FRONT END
OUTPUT STAGE
Protect
Circuit
BASS ENHANCED
OFF/ON
2 2
33
11
SENS
SWITCH
26dB/32dB


8
5HPX900MalfunctionAnalysisonPowerSupply
5.1CircuitDiagramofSMPS:

5.2MalfunctionAnalysisonSMPS:

Sequence
No.
Circuitto
check
MostProbablyFailures
1LineFilterand
theSoft‐start
‐TheACfuseontherearpanelwasburntwhenconnectedthe
electricity:checktheRT1varistordeviceandtheotherlinefilterdevice
toseeifthereisshortcircuit.
‐RL1Relaydoesnotpull‐inandthethermistorNPTR1isburntsothe
amplifiercannotstart.
‐Theoutput‐stagecircuitisburnt:thereforetheinputfusewas
destroyed.
‐Connectingthejumperof110VandACIport,thedoublevoltage
rectifierwillletthecircuitworkwith110Vand120Vmainsvoltage.
2Self‐excited
Circuit
‐TheamplifiercannotstartandtheInputfuseisburnt:mainlycheckif
thepowerswitchtransistorQ29~Q36isdamagedornot.Anyoneof
transistorsburntwillresulttonooutput;thencheckalsothezener
diodeDZ10,DZ11,DZ12,DZ13foropenorshortcircuit,itwillalso

9
resultstoblockingandhigh‐current.
3
On/Off
Anti‐shock
Circuit
‐Theamplifiercannotstartandthereisshocksoundwhenshutdown:
mainlycheckthedeviceofthiscircuit,seewhetherthedetached
photocouplerOP1/817,Q37,Q38isdamagedornot;
4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.
5Rectifier
OutputCircuit
‐Powersupplyprotectionhappenedwhileswitchon.
‐Poweramplifierprotectionhappenedwhileswitchon.
‐Seriousdistortionofsound.
‐No±15Vvoltage.
‐No+24Voutput,resultstoalltheindicatorledonthepaneldonot
shine(start‐upunavailable)
RepairingGuide:
1)WhenrepairingtheSMPSboard,pleasecuttheDC/300Vfuse,seriesconnectone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amplifier
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.


10
6HPX900MalfunctionAnalysisonAmplifiedPart
6.1CircuitDiagramofAmplifier



11
6.2MalfunctionAnalysisonAmplifiedPart

Sequence
No.
CircuitFunctionFailure
1ClassABPower
Output
‐Powersupplyprotection:Anyoftheshortcircuitsofpoweroutput
transistor(CH1/Q2,Q3,Q10,Q11,CH2/Q19,Q20,Q24,Q25)willcause
thehighcurrentandpowersupplyprotection;
‐Amplifierprotection:+15V/‐15Visderivedfromthecurrentlimiting
ofR31,R40andD3,D4,ifthepowersupplyisabnormalitwillleadto
theDCoutput,amplifierwillgointoprotectstatus;
‐Cliplimitdoesn’twork–checkwhetherthedevicesofD7,D8,D9,
D40,LED1,R22isdamagedornot;
‐Amplifierself‐excitation–checkwhetherthedeviceofC3,C7,C8,
C10,C14wasturnbad.
‐Crossoverdistortion:checkwhethertheBEvoltageofthe
negative‐positivehalf‐wavepowertransistoris<0.2Vornot,thencheck
thevalueoftemperaturecompensationtransistorQandresistance
(R25,R26,R13)ischanged;
‐IC/5532damaged,unbalancedoftheofpositiveandnegativebias
voltage,hasDCoutputandpoweramplifiergoesintoprotection.
2
Overload/
Short‐circuit
Protection
‐Outputshort‐circuitandnoprotection,
‐Start–upprotection
3ClipLimit
Circuit
‐Nocliplimit,checkwhethertheD7ison;
‐Cliplimitdelayed,checktheD9andR19;
‐Waveformjitterwhenincliplimit;
‐Novolumegraduallyincreasefunctionafterstart‐up.
4
Over‐temperature
Protectionand
DelayCircuit
‐ThedelaycircuitprotectisacollectionofVHF,shortcircuit,
over‐temperature,DC‐protection,aswellasstart‐updelay.
‐WhentheProtectionfunctionandstart‐updelayisabnormalplease
checkthiscircuit.
5DCProtectCircuit
‐Nooutput‐relaydoesnotpull‐in,firstcheckwhetheritisnormalfor
24Vpowersupply,Q6baseisahighlevel.
‐On/offhasthesoundofshock‐alongpull‐inontherelay;
RepairingGuide:
1)Whenrepairingtheamplifier,pleaseseriesconnecta100W—200Wlamptostarttheequipmentin
order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supplyandprotectionindicatoronthepanelarelit;


12
7HPX1200/2400/2800MalfunctionAnalysisonAuxPower
SupplyBoard
7.1HPX1200/2400/2800CircuitDiagramofAuxpowersupplyModule

7.2MalfunctionAnalysisonAuxpowersupply

Sequence
No.
Circuit
Function
Failure
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,providetwogroupstandby
powersupply+5V&+16V.Amongthem,CN3/+5Visforpoweron/off
led(orange),CN1+16Visforthemainpowercontrolboard,themain
poweron/offiscontrolledbytheCN4inplug.WhentheCN4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.


13
8HPX1200/2400/2800MalfunctionAnalysisonSMPSCONTROL
Circuit
8.1CircuitDiagramofSMPSCONTROL

8.2MalfunctionAnalysisonSMPSCONTROLModuleCircuit

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!

14
9HPX1200MalfunctionAnalysisonSMPS.
9.1CircuitDiagramofSMPS

9.2HPX1200MalfunctionAnalysisonSMPS:

Sequence
No.
Circuit
Function
Failure
1LineFilterand
theSoft‐start
‐TheACfuseontherearpanelwasburntwhenconnectedthe
electricity:checktheRT1varistordeviceandtheotherlinefilter
devicetoseeifthereisshortcircuit.
‐RL1Relaydoesnotpull‐inandthethermistorNPTR1isburntsothe
amplifiercannotstart.
‐Connectingthejumperof110VandACIport,thedoublevoltage
rectifierwillletthecircuitworkwith110Vand120Vmainsvoltage.
2LLCresonant
converter
‐85°ctemperaturecontrolswitchisoftenclosedresulttothe
start‐upunavailable;
‐Ifstart‐uptheequipment,high‐currentwillresultstotheburntout
oftheDC/300Vfuse;
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
‐Powerprotectioncausedbythedamageofhigh‐speeddiodes
(D13,D14,D15,D16,E11,E12,C27,C261,C271)oranyofrectifier
filterdevice.
‐Poweramplifierstart‐upprotection.
‐Poweramplifierprotectioncausedbyno±15Voutput;allthe
indicatoronthepaneldonotshinedbecauseno+24Voutput
(start‐upunavailable)
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+

15
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;


16
10HPX1200MalfunctionAnalysisonAmplifiedPart
10.1CircuitDiagramofAmplifier


17
10.2MalfunctionAnalysisonAmplifiedPart

Sequence
No.
CircuitFunctionFailure
1ClassABPower
Output
‐Powersupplyprotection:Breakdownofanyonepowertransistor
willcauseashortcircuitandresultstohighcurrentprotection.
‐Amplifierprotection:+15V/‐15Vifthepowersupplyisabnormalwill
leadtotheDCoutput,amplifierwillgointoprotectionstatus;
‐Nocliplimit;
‐Amplifierself‐excitated;
‐Cross‐overdistortion;
‐IC/5532damaged,unbalancedoftheofpositiveandnegativebias
voltage,hasDCoutputandpoweramplifiergoesintoprotection.
2
Overload/
Short‐circuit
Protection
‐Outputshort‐circuitandnoprotection,
‐Start–upprotection;
3ClipLimitCircuit
‐Nocliplimit;
‐Cliplimitdelayed;waveformjitterwhenincliplimit;
‐Volumewillnotgomaximumgraduallyafterstart‐up.
4
VHF/Over‐heat
Protectionand
DelayCircuit
‐Theprotection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isabnormalplease
checkthiscircuit.
5DCProtection
‐Nooutput‐relaydoesnotpull‐in,firstcheckwhetheritisnormalfor
24Vpowersupply,Q6baseisahighlevel.
‐On/offhasthesoundofshock‐alongpull‐inontherelay;
RepairingGuide:
1)Whenrepairingtheamplifier,pleaseseriesconnecta100W—200Wlamptostart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;


18
11HPX2400/2800MalfunctionAnalysisonSMPS
11.1CircuitDiagramofSMPS


19
11.2MalfunctionAnalysisonSMPS:

Sequence
No.
CircuitFunctionFailure
1
Line
Filter/Soft‐start/
Rectification
‐TheACfuseoftherearpanelisburntwhenconnectedthe
electricity‐checktheRT1deviceandlinefilterdevicetoseeifthereis
shortcircuit.
‐Thereissmokebutitcanstillworkwhileoutputpower,check
whetherthethermistor/NPTR1wasburntcausedbytherelaydidn’t
pull‐in;
‐Connectthejumperof110VandACIport,thedoublevoltage
rectifierwillletthecircuitworkin110Vand120Vstatus;
2LLCResonant
Converter
‐85°Cthermalswitchisoftenclosedresulttothestart‐up
unavailable;
‐Whilestart‐uptheequipment,high‐currentwillresultstotheburnt
outoftheprimaryDC/DC/300Vfuse;
‐Switchingtransistorisnotworking,checkthedrivingtransformer
T2,aloopisformedbytheprimarycurrentgothroughthe
transformerT1A,resonantinductorL4andresonantcapacitorC106;
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
‐Powerprotectioncausedbythedamageofhigh‐speeddiodesD49,
D50,D51,D52,D67,D68,D73,D74,E4,E5,E7,E8,C6,C7,C8,C9,or
anyofrectifierfilterdevice.
‐Poweramplifierstart‐upprotection.
‐Outputdistortionandpowerprotectioncausedbyno±15Voutput;
‐Alltheindicatorsonthepaneldonotshinedbecauseno+24V
output(start‐upunavailable).
RepairingGuide:
1)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.
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indicatorsonthefrontpanellitandthenimmediately
blackout;


20
12HPX2400/2800MalfunctionAnalysisonAmplifiedPart
12.1CircuitDiagramofAmplifier
