Ecler-MPA4.400-pwr-sm维修电路原理图.pdf

《Ecler-MPA4.400-pwr-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Ecler-MPA4.400-pwr-sm维修电路原理图.pdf（72页珍藏版）》请在收音机爱好者资料库上搜索。

1、 MPA4-400 SERVICE MANUAL 1000100100 POWER 10 OFF ON CHANNEL 4 VOL 5 CLIP SP CHANNEL 1CHANNEL 3 5 SP 5 CLIP CHANNEL 2 CLIP SP 5 400 MULTICHANNEL POWER AMPLIFIER MP THERMAL SP CLIP LECRE A4- VOLVOLVOL MAINS INPUT GND XLR CONNECTIONS: PIN 1 - GROUND, PIN 2 - PHASE, PIN 3 - NON PHASE IN 2 LINK CH 1 LINK

2、 CH 2 IN 4 BRIDGE IN 3 BRIDGE OFFON IN 3+IN 4 GND LINK STEREO BRIDGE IN 1+IN 2 ON IN 4 CHANNEL 4 HP FILTER OFF ON OFF IN 2 BRIDGE IN 1 STEREO CHANNEL 2 LP FILTER IN 1 IN 3LINK CH 1 CHANNEL 3 IN 1 IN 3 IN 1+IN 2 CHANNEL 1 CH 2 - CH 2 + MINIMUM LOAD: 4 OHM STEREO, 8 OHM BRIDGE FOR BRIDGED OUTPUT USE R

3、ED POSTS ONLY. OUTPUT BRIDGED CH 3 -CH 4 - CH 4 +CH 3 + BRIDGED CH 1 - CH 1 + RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL MPA4-400 INDEX - BLOCK DIAGRAM - FUNCTIONING DESCRIPTION - SCHEMATICS Power amplifier Inputs Power Supply + Outs Leds + potentiometers - COMPONENTS LOCATION SCHEMA Power amplifier Pow

4、er Supply + Inputs + Outs Leds + potentiometers - TESTING AND QUALITY CONTROL - TECHNICAL CHARACTERISTICS - WIRING DIAGRAM - CONFIGURATION DIAGRAM - MECHANICAL DIAGRAM - PACKING DIAGRAM RadioFans.CN 收音机爱 好者资料库 52-0017-0100 EP14-02.doc 1 of 2 The amplifying stage basic structure is actually the one c

5、ommonly used until now, this is, a push-pull mounted A-B class amplifier, using P-type (IRFP9240) and N-type (IRFP240) mosfets. The systems controlling core is a NE5534 OpAmp, which is internally compensated in order to obtain an amplifying gain ratio equal or greater than 3. The amplifiers feedback

6、 runs through a resistor and a capacitor associated to the OpAmps non-inverting input. Transistors BF871 and BF872 are common-base configured, becoming actually a current source structure. They accomplish a dual function: on one hand, they polarise the mosfets gate-source junction, keeping them on t

7、heir conduction knee. On the other hand, they carry out the OpAmps output voltage variations, referred to signal ground. The polarisation current adjustment is fixed by a 2k5 trimming potentiometer connected to the BF transistors base. This current is added to the current sources output, which passe

8、s through the BF-transistors load resistors. The bias current stability against temperature is fixed through the BD437 transistors. Their temperature- dependent base-emitter voltage curve is used to alter adequately the current sources reference voltage. As a consequence, if the temperature rises, t

9、he reference voltage decreases, thus the gate- source voltage also does, and finally the bias current also decreases. The Zobel network, formed by a resistor-inductor-capacitor group, and which is located at the amplifiers output, intends to keep the amplifiers load impedance as constant as possible

10、, no matter which load is connected to the stages output, or which signal frequency is to be amplified, in order to prevent an inverted-phase feedback signal. In order to avoid a DC offset on the output signal, a diac-triac tandem system is used, which shorts the output to signal ground when the DC

11、level is enough to get the diac triggered. To prevent this from happening while carrying audio signal (sine-wave, music), the diacs reference voltage is taken from a filter formed by resistor R161 and capacitor C123. The protection circuitry supervises at any time the power consumed by the MOSFETS.

12、The circuitry basically consists on two sections: MOSFETs drain current (Id) monitoring and drain-source voltage (Vds) monitoring. When the drain current exceeds a certain limiting value, a transistor (called control- transistor) becomes conducting, together with an auxiliary circuitry (helper), for

13、med by a transistor (which is the same type as the control-transistor) and a 82V Zener diode. This value determines the point where the auxillary circuitry starts to run. The helper- transistors base-emitter junction curve is used to obtain a non-linear variation on the MOSFETS gate-source voltage c

14、ontrol, and thus on their drain current. author: Queralt date: 020927 project: EP14-02 product: MPA4-400 ECLER approved: num: 52.0017 version: 01.00 title: FUNCTIONING DESCRIPTION 52-0017-0100 EP14-02.doc 2 of 2 Moreover, as the helper-transistors base-emitter current is temperature-dependent, the c

15、ontrolling circuitry (basically the control-transistor) compensates the safe operation area (SOA) drift due to temperature. If the MOSFETs drain-source voltage (Vds) drops too low, a second circuitry actuates to alter the control-transistors triggering level, obtaining a SOA-like curve section and a

16、 current stage, which can be adjusted adequately in order to maintain the MOSFETs power consumption as close as possible to its SOA. Moreover, the amplifier also includes an ANTICLIP system. When the amplifier reaches its clipping level, the OpAmp becomes unable to keep the system under control, and

17、 as a consequence V peaks appear at its output (15V power supply). This peaks are used to be rectified and sent to an optocupler (led-resistor) which modifies its impedance as a function of those peaks amplitude. The resulting impedance is part of a voltage divider, together with the amplifiers inpu

18、t impedance. So, as the optocoupler increases its impedance, the amplifiers input signal level decreases until the system becomes stable. Also a dual-function temperature control circuitry is provided: - Temperature-depending control of the cooling fan speed, whose voltage supply is variable between

19、 7 and 14 Vac. - Amplifier shutdown when temperature exceeds approximately 90C. The circuitry is formed by LM35D-type IC, which acts like a thermal probe, an amplifier, thermal probe level comparator and a 7805-type voltage regulator. The amplifier is responsible for the cooling fan speed control. T

20、he comparator triggers a relay, which cuts off the MOSFETs bias current by shunting a 22 resistance to the BF- type transistors load resistors. This way, the output signal of the amplifier is effectively cutted off. The STAND-BY circuit. This circuit keeps the safety relay closed for about 10 second

21、s, thus the MOSFETs bias current is cutted off during this period, until the whole system reaches again a voltage- stable situation. Due to this, hearing annoying transients and noises during start up through the loudspeakers is avoided. This delay is obtained by a RC-cell, where R=287K, and C=47F/5

22、0V. During start up, this RC-cells voltage smoothly rises until the 40106- type Trigger-Schmitt trigging level is reached, and the amplifier starts functioning. C=47F resets or discharges when the unit is turned off. During a short period of time, a BC817- type transistor acts like a switch, connect

23、ing two 75 parallel resistors to C=47/50V. PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCXCD1220022pC101 FCXCD41000100nC102 FCXCD41000100nC103 FCCE25010010u/50C104 FCCE25047047u/50C105 FCXCD1680068pC106 FCXCD1680068pC107 FCCE35047047u/100C108 FCCE35047047u/100C109 FCCE25010010

24、u/50C110 FCXCD41000100nC111 FCXCD1150015pC112 FCXCD41000100nC113 FCCE25010010u/50C114 FCXCD44700470nC115 FCXCD44700470nC116 FCXCD1150015pC117 FCXCD1150015pC118 FCCDK52200C220n/100VC119 FCCDK52200C220n/100VC120 FCXCD26800680pC121 FCXCD26800680pC122 FCCDK20010C1u/63VC123 FCXCD4010010nC124 FCXCD4010010

25、nC125 FCCDH71100C100n/400VC126 FCCDH71047C47n/400VC127 FCXCD41000100nC128 FCXCD41000100nC129 FCXCD41000100nC130 FCCE25010010u/50C131 FCXCD44700470nC132 FCCE25010010u/50C133 FCCE10000047u/16C134 FCXCD44700470nC135 FCCE25047047u/50C136 FCCE25047047u/50C137 FCCE25010010u/50C138 FCCE154700470u/25C139 FC

26、XCD1220022pC140 FCXCD41000100nC141 FCXCD41000100nC142 FCCE25010010u/50C143 FCCE25047047u/50C144 FCXCD1680068pC145 FCXCD1680068pC146 FCCE35047047u/100C147 FCCE35047047u/100C148 FCCE25010010u/50C149 FCXCD41000100nC150 FCXCD1150015pC151 FCXCD41000100nC152 FCCE25010010u/50C153 FCXCD44700470nC154 FCXCD44

27、700470nC155 FCXCD1150015pC156 40-0113-0105 EP14-02 MPA4-400.xls1 of 10 PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCXCD1150015pC157 FCCDK52200C220n/100VC158 FCCDK52200C220n/100VC159 FCXCD26800680pC160 FCXCD26800680pC161 FCCDK20010C1u/63VC162 FCXCD4010010nC163 FCXCD4010010nC16

28、4 FCCDH71100C100n/400VC165 FCCDH71047C47n/400VC166 FCCE10000047u/16C167 FCCE25047047u/50C168 FCXCD41000100nC169 FCPERL2550Cer. BeadCB101 FCPERL2550Cer. BeadCB102 FCPERL2550Cer. BeadCB103 FCPERL2550Cer. BeadCB104 FCCI009560Printed Board 11.0956CI101 FCXDDBAS28BAS28D101 FCXZ000075Z7.5VD102 FCXDDBAS28B

29、AS28D103 FCXZ000039Z3.9VD104 FCXZ000039Z3.9VD105 FCLEDSMD20TLMH3101D106 FCLEDSMD20TLMH3101D107 FCDD041200Z12D108 FCDD041200Z12D109 FCDD041200Z12D110 FCDD041200Z12D111 FCDD041200Z12D112 FCDD041200Z12D113 FCXZ000180Z18VD114 FCXZ000180Z18VD115 FCDD102700Z27V/1D116 FCDD102700Z27V/1D117 FCDIDB3000DB3D118

30、 FCXZ000082Z8.2VD119 FCXZ000082Z8.2VD120 FCXZ000056Z5.6VD121 FCXDDBAS16BAS16D122 FCXDD400701N4007D123 FCXZ000120Z12VD124 FCXDDBAS28BAS28D125 FCXDDBAS16BAS16D126 FCXDDBAS16BAS16D127 FCXDD400701N4007D128 FCXZ000100Z10VD129 FCXDDBAS16BAS16D130 FCXDDBAS16BAS16D131 FCXDDBAS28BAS28D132 FCXZ000075Z7.5VD133

31、 FCXDDBAS28BAS28D134 FCXZ000039Z3.9VD135 FCXZ000039Z3.9VD136 FCLEDSMD20TLMH3101D137 FCLEDSMD20TLMH3101D138 40-0113-0105 EP14-02 MPA4-400.xls2 of 10 PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCDD041200Z12D139 FCDD041200Z12D140 FCDD041200Z12D141 FCDD041200Z12D142 FCDD041200Z12

32、D143 FCDD041200Z12D144 FCXZ000180Z18VD145 FCXZ000180Z18VD146 FCDD102700Z27V/1D147 FCDD102700Z27V/1D148 FCDIDB3000DB3D149 FCXZ000082Z8.2VD150 FCXZ000082Z8.2VD151 FCXZ000056Z5.6VD152 FCXDD400701N4007D153 FCXZ000120Z12VD154 FCXDDBAS28BAS28D155 FCXDDBAS16BAS16D156 FCXDDBAS16BAS16D157 FCFUS50350F8AF101 F

33、CFUS50350F8AF102 FCFUS50350F8AF103 FCFUS50350F8AF104 FCFER43220FerriteFB101 FCFER43220FerriteFB102 FCFER43220FerriteFB103 FCFER43220FerriteFB104 FCFER43220FerriteFB105 FCFER43220FerriteFB106 FCFER43220FerriteFB107 FCFER43220FerriteFB108 FCFER43220FerriteFB109 FCFER43220FerriteFB110 FCFER43220Ferrite

34、FB111 FCFER43220FerriteFB112 FCMECT0220Heatsink f/ TO220HS101 FCMECT0220Heatsink f/ TO220HS102 FCMECT0220Heatsink f/ TO220HS103 FCMECT0220Heatsink f/ TO220HS104 FCMECT0220Heatsink f/ TO220HS105 FCMECT0220Heatsink f/ TO220HS106 FCMECT0220Heatsink f/ TO220HS107 FCRAD13850Heatsink f/ Power ModuleHS108

35、FCOPTVTL50VTL 5C8IC101 FCIC071010TL071IC102 FCIC553410NE5534AIC103 FCIC431010LM431ACIC104 FCIC350000LM35DZIC105 FCIC072010TL072IC106 FCREG780507805IC107 FCIC409301HEF4093BIC108 FCOPTVTL50VTL 5C8IC109 FCIC071010TL071IC110 FCIC553410NE5534AIC111 FCIC409301HEF4093BIC112 FCMICTO126Insulant TO126IN101 40

36、-0113-0105 EP14-02 MPA4-400.xls3 of 10 PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCMICTO126Insulant TO126IN102 FCMICTO126Insulant TO126IN103 FCMICTO126Insulant TO126IN104 FCMICTO126Insulant TO126IN105 FCMICTO126Insulant TO126IN106 FCMICTO126Insulant TO126IN107 FCTIRKON00Insu

37、lating polymerIN108 FCTIRKON00Insulating polymerIN109 FCMICTO126Insulant TO126IN112 FCCTM00040B4B-EH-AJ101 FCCTM00030B3B-EH-AJ102 FCTERM0100Jumper PinJ103 FCTERM0100Jumper PinJ104 FCTERM0100Jumper PinJ105 FCTERM0100Jumper PinJ106 FCTERM0100Jumper PinJ107 FCTERM0100Jumper PinJ108 FCCTM00030B3B-EH-AJ1

38、09 FCCTM00020B2B-EH-AJ110 FCCTM00040B4B-EH-AJ111 FCTERM0100Jumper PinJ112 FCTERM0100Jumper PinJ113 FCTERM0100Jumper PinJ114 FCTERM0100Jumper PinJ115 FCTERM0100Jumper PinJ116 FCTERM0100Jumper PinJ117 FCREL00300TQ2-12VK101 FCREL00300TQ2-12VK102 FCIND001001uHL101 FCIND001001uHL102 FCMJ000100JumperMJ101

39、 FCMJ000100JumperMJ102 FCMJ000100JumperMJ103 FCMJ000100JumperMJ104 FCMJ000100JumperMJ105 FCMJ000100JumperMJ106 FCPINZAM00Clamp WD. 00.2636MP101 FCPINZAM00Clamp WD. 00.2636MP102 FCTUE00300Nut M3NV101 FCTUE00300Nut M3NV102 FCTUE00300Nut M3NV103 FCTUE00300Nut M3NV104 FCTUE00300Nut M3NV105 FCTUE00300Nut

40、 M3NV106 FCPORF31503/15PPF101 FCPORF31503/15PPF102 FCPORF31503/15PPF103 FCPORF31503/15PPF104 FCTR437000BD437Q101 FCTR437000BD437Q102 FCTR471000BF471Q103 FCTR472000BF472Q104 FCTR340000MJE340Q105 FCTR350000MJE350Q106 FCTR340000MJE340Q107 FCTR350000MJE350Q108 40-0113-0105 EP14-02 MPA4-400.xls4 of 10 PA

41、RTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCTR243000IRFP9240Q109 FCTR240000IRFP240Q110 FCTR243000IRFP9240Q111 FCTR240000IRFP240Q112 FCXTT08570BC857BQ113 FCXTT08470BC847BQ114 FCXTT08570BC857BQ115 FCXTT08470BC847BQ116 FCTR240000IRFP240Q117 FCTR243000IRFP9240Q118 FCXTT08570BC857B

42、Q119 FCXTT08470BC847BQ120 FCTI246000BTB24600BQ121 FCXTT08570BC857BQ122 FCXTT08470BC847BQ123 FCTR2540102N5401Q124 FCXTT08470BC847BQ125 FCXTT08170BC817/25Q126 FCTR437000BD437Q127 FCTR437000BD437Q128 FCTR471000BF471Q129 FCTR472000BF472Q130 FCTR340000MJE340Q131 FCTR350000MJE350Q132 FCTR340000MJE340Q133

43、FCTR350000MJE350Q134 FCTR243000IRFP9240Q135 FCTR240000IRFP240Q136 FCTR243000IRFP9240Q137 FCTR240000IRFP240Q138 FCXTT08570BC857BQ139 FCXTT08470BC847BQ140 FCXTT08570BC857BQ141 FCXTT08470BC847BQ142 FCTR240000IRFP240Q143 FCTR243000IRFP9240Q144 FCXTT08570BC857BQ145 FCXTT08470BC847BQ146 FCTI246000BTB24600

44、BQ147 FCXTT08570BC857BQ148 FCXTT08470BC847BQ149 FCTR2540102N5401Q150 FCXTT08470BC847BQ151 FCXTT08170BC817/25Q152 FCXR5610001MR101 FCXR54215021k5R102 FCXR54215021k5R103 FCXR54215021k5R104 FCXR551000100k0R105 FCXR5310001k0R106 FCXR5310001k0R107 FCXR54348034k8R108 FCXR54348034k8R109 FCXR5319601k96R110

45、FCXR5356205k62R111 FCXR57100010MR112 40-0113-0105 EP14-02 MPA4-400.xls5 of 10 PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCXR5312101k21R113 FCXR5312101k21R114 FCXR525110511R115 FCXR521780178R116 FCXR525110511R117 FCXR521780178R118 FCXR51562056.2R119 FCXR5314701k47R120 FCXR531

46、4701k47R121 FCXR51562056.2R122 FCXR526810681R123 FCXR5314701k47R124 FCRJG447004k7R125 FCXR526810681R126 FCXR51100010.0R127 FCXR51562056.2R128 FCXR523160316R129 FCXR51562056.2R130 FCXR51100010.0R131 FCXR523160316R132 FCRF426800NF68/1R133 FCRF426800NF68/1R134 FCRF232200NF220/ 1/2R135 FCRF232200NF220/

47、1/2R136 FCRF232200NF220/ 1/2R137 FCRF232200NF220/ 1/2R138 FCRY000100W0.22/5R139 FCRY000100W0.22/5R140 FCRY000100W0.22/5R141 FCRY000100W0.22/5R142 FCXR54261026k1R143 FCXR54237023k7R144 FCRF232200NF220/ 1/2R145 FCRF232200NF220/ 1/2R146 FCXR525620562R147 FCXR525620562R148 FCXR524640464R149 FCXR52464046

48、4R150 FCXR54348034k8R151 FCXR54348034k8R152 FCRY000100W0.22/5R153 FCRY000100W0.22/5R154 FCXR5368106k81R155 FCXR54348034k8R156 FCXR54348034k8R157 FCXR5368106k81R158 FCXR54348034k8R159 FCXR54348034k8R160 FCXR54464046k4R161 FCXR521000100.0R162 FCXR521000100.0R163 FCXR54133013k3R164 FCXR54133013k3R165 F

49、CXR521000100.0R166 FCXR5310001k0R167 FCRY0002506.8/5WR168 40-0113-0105 EP14-02 MPA4-400.xls6 of 10 PARTS LIST: PRINTED CIRCUIT 11.0956.03.01 CodeDescriptionReference FCXR5310001k0R169 FCXR521000100.0R170 FCRC52100010/2R171 FCRC5122002.2/2R172 FCXR5342204k22R173 FCXR5342204k22R174 FCXR5342204k22R175 FCXR5342204k22R176 FCXR54464046k4R177 FCXR54464046k4R178 FCXR54464046k4R179 FCXR5321502k15R180 FCXR54100010k0R181 FCXR5316201k62R182 FCXR524640464R183 FCXR54464046k4R184 FCXR54100010k0R185 FCXR551000100