Ecler_DPA2500T,_4000T_Service_Manual 电路图.pdf

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1、 DPA2500T / DPA4000T SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL DPA2500T DPA4000T INDEX - BLOCK DIAGRAM - FUNCTIONING DESCRIPTION - SCHEMATICS - COMPONENTS LOCATION SCHEMA - TESTING AND QUALITY CONTROL - TECHNICAL CHARACTERISTICS - WIRING DIAGRAM - CONFIGURATION DIAGRAM - MECHANICAL DIAGR

2、AM - PACKING DIAGRAM RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 52-0031-0100 EP04-05-05 DPA2500T DPA4000T Angls.doc 1 of 2 POWER MODULE. Due to the high power level required on the output load, the amplifier final stages structure differs from the design used until now. This is due to the break

3、down voltage limit on P-channel MosFETs, with is 200V. This final stage is formed by several shunted MosFETs, where those of the positive branch are common-drain configured, and the negative branch are mounted in common-source configuration. The systems controlling device is a NE5534-type operationa

4、l amplifier, with is internally compensated in order to obtain gain levels equal or higher than three. The amplifiers feedback is given by a resistor and a capacitor associated to the operational amplifiers non inverting input. Transistors BF471 and BF472 are common-base configured, forming a curren

5、t supply structure. This specific transistor type is used because of the higher Vce voltage level required by this design. They perform simultaneously two functions: they polarize the MosFETs gate-source junctions, keeping them on the conducting edge, and they transfer the OpAmps output voltage vari

6、ations referred to signal ground. The signal variations normally reflected by Q107 and referred to the positive power supply, are now needed to be floating variations, and referred to the outputs. This function is done by Q109-110 (BF472), with are mounted forming a Wilson-type mirror current supply

7、. This mirror current supply transfers all of the current variations detected while descending through Q109s collector, to similar variations on Q110s collector also downward current. Resistors R167 and R174 are used to balance the current mirror, in order to avoid the use of transistors with forcib

8、ly the same beta value. C138 and C141 suppress their resistance when high frequency signal is processed. Diodes D126 and D127 avoid the transistors to get saturated, and R171 eliminates the loads on BF472s bases (Baker Circuit). The system requires about 12Vdc additional voltage upon the usual Vcc l

9、evel, this allows a correct saturation and a symmetric clipping at the higher MosFETs. The correct polarization current value is adjusted by a 4K7 potentiometer connected to the BF transistors emitter. This adds an additional current to the current source output on the BF transistors loading resisto

10、rs. In order to maintain the appropriate stand-by current level against varying temperature conditions, BD437-type transistors are used. As they have a particular temperature-depending base-emitter voltage curve, this voltage is used to keep a correct voltage reference for the current supply. As the

11、 temperature rises, the reference voltage level decreases, the gate-source voltage also decreases and, finally, the bias current also decreases. Transistors Q111 and Q112, and their corresponding twins at the lower branch, form a current-buffering circuit with allows a fast charge and discharge of t

12、he power MosFETs gates. The Zobel circuit, a resistance-capacitance-inductance formed network associated to the amplifiers output, tries to keep the amplifiers output load impedance constant no matter with load value is connected to the output, or with frequency is processed, in order to avoid phase

13、 shifts on the feedback signal. To avoid the presence of DC voltage on the output, a diac-triac based system is used, with shorts the output to signal ground in case the DC level reaches the diacs triggering value. To avoid this to happen when processing correct signal (sine waveform, music.), the d

14、iac obtains its reference level from a filtering network formed by a 100K resistor and a 1F capacitor. The protections circuitry overhauls the MosFETs power consumption. Basically, this circuitry consists of two important sections: MosFETs Id current monitoring, and MosFETs Vds value detection. auth

15、or: J. Colominesdate: 051006 project: EP04/05-05 product: DPA2500T/4000T ECLER approved: num: 52.0031 version: 01.00 title: FUNCTIONING DESCRIPTION 52-0031-0100 EP04-05-05 DPA2500T DPA4000T Angls.doc 2 of 2 When the MosFETs Id level rises above a certain level, transistor Q119 (controlling transisto

16、r) conducts and decreases the BF transistors loading resistance, thus reducing also their gate-source voltage and, finally, lowering the Id current value. This system is helped by a delayed performance, due to the associated circuitry to Q145 and C174. This capacitor starts to charge when a current

17、level above the allowed value is detected, and the protection starts. The greater is the capacitors charge level, the higher is also the voltage applied to Q119 controlling transistors base, increasing its conduction and, consequently, reducing the gate-source voltage and thus the Id current value.

18、This system uses a feedback network. The delay used is necessary to avoid clipping the processed signals dynamic range, with should result in the typical clipping noise. In the negative branch, the protection circuitry is associated to control transistor Q120. In case the overcurrent is not occasion

19、al, and persists, after a period of time between 4 and 10 seconds (determined by R142 and C124), the system switches back to Stand-by mode, due to a system-reset. This is done by an optocoupler (IC113) associated to the negative branch protection circuitry. When protections get activated, IC113 grad

20、ually charges C124 until a 40106-type Schmidt trigger gate switches over. If the problem persists, this cycle is repeated. STANDBY CIRCUITRY. This circuit maintains the Output shutdown relay closed for about 10 seconds, and thus annulated any current through the MosFETs during this period, just unti

21、l the whole systems power supply voltage reaches its stable level. By this system, we avoid to hear through the loudspeakers any possible annoying noise proceeding from the systems start-up. This delay time is achieved by using a RC cell, where R135=287K and C119=47F/50V. As this cell charges, its v

22、oltage increases until reaching the 40106-type Schmidt trigger (IC108) switching value; at this point, the relay opens and the amplifier starts to function normally. The discharge or reset of capacitor C119=47F can be done by cutting off the power supply, or by triggering the Thermal or other protec

23、tions. During a short period of time, BC817-type transistor Q102 acts like a switch, shunting two 75 resistors to C119. Moreover, the amplifier includes some other additional features, like: - Volume control by a VCA system. - An ANTICLIP system. - A Temperature control system. THE ANTICLIP SYSTEM.

24、When the amplifier reaches clipping levels, the operational amplifier looses control on the systems performance and at its output some Vcc voltage peaking pulses may appear, proceeding from its power supply. This peaking pulses are used to be rectified and sent to an optocoupler (IC111), with varies

25、 the systems VCA control voltage as a function of those pulses amplitude, creating a negative feedback with should pull back the system into stable functioning area. The Temperature control system has three main functions: - Controlling the cooling fan speed, as it is a function of the measured temp

26、erature. The fans operation voltage range is 7 to 14 Volts. - Suspending the amplifiers functioning when the temperature exceeds 92C - Reducing the amount of power output, depending on the modules temperature (as it rises above 85C) and on the main power supplys transformer (above 120C). The tempera

27、ture control system consists on two LM35D-type ICs, with act like a thermal probe; one is placed on the amplifiers heat sink, and the other is placed into the main power supply transformers core. Moreover, three amplifiers, a comparator for the thermal probe and a 7805-type IC to feed the cooling fa

28、n are used. The first amplifier (1/4 IC114) acts on the cooling fan speed control. The second amplifier (1/4 IC114) modifies the VCA gain control, in order to reduce the systems gain if the temperature rises above 85C. The third amplifier (1/4 IC114) modifies the VCA gain control, in order to reduce

29、 the systems gain if the temperature rises above 120C. The comparator (1/4 IC114) is responsible for the output shutdown relay performance, in order to close it as the temperature reaches 92C, and thus cutting of the amplifiers MosFETs bias current. As this happens, the signal output of the whole un

30、it is cutted off. PARTS LIST: PRINTED CIRCUIT 11.1034.02.01 CodeDescriptionReference FCCE3502200022u/100C101 FCCE3502200022u/100C102 FCCDH7147000C470n/275V X2C103 FCCDH7147000C470n/275V X2C104 FCCDH7147000C470n/275V X2C105 FCCDH7147000C470n/275V X2C106 FCCCD2225000C2n2/250V Y1C107 FCCCD2225000C2n2/2

31、50V Y1C108 FCCCD2225000C2n2/250V Y1C109 FCCCD2225000C2n2/250V Y1C110 FCPERL255000Cer. BeadCB101 FCPERL255000Cer. BeadCB102 FCPERL255000Cer. BeadCB103 FCPERL255000Cer. BeadCB104 FCPERL255000Cer. BeadCB105 FCPERL255000Cer. BeadCB106 FCPERL255000Cer. BeadCB107 FCPERL255000Cer. BeadCB108 FCPERL255000Cer

32、. BeadCB109 FCPERL255000Cer. BeadCB110 FCPERL255000Cer. BeadCB111 FCPERL255000Cer. BeadCB112 FCCI01034000Printed Board 11.1034.02CI101 FCDD140070001N4007D101 FCDD140070001N4007D102 FCDD140070001N4007D103 FCDD140070001N4007D104 FCDD140070001N4007D105 FCDD140070001N4007D106 FCDD140070001N4007D107 FCDD

33、140070001N4007D108 FCFUS804000016A Temp.F101 FCFUS804000016A Temp.F102 FCCTAMP060006P AMP MALE SOCJ101 FCCTAMP060006P AMP MALE SOCJ102 FCCTAMP060006P AMP MALE SOCJ103 FCCTAMP060006P AMP MALE SOCJ104 FCTERMF63000Faston 6.3mmJ106 FCTERMF63000Faston 6.3mmJ107 FCREL1060000Relay 60V 6000K101 FCREL1060000

34、Relay 60V 6000K102 FCBB2X3500002x1.5mHL101 FCBB2X3500002x1.5mHL102 FCPORF020000Fuse clipPF101 FCPORF020000Fuse clipPF102 FCPORF020000Fuse clipPF103 FCPORF020000Fuse clipPF104 FCRC545600005k6/2R101 FCRC545600005k6/2R102 FCNTC0030000NTC10R103 FCNTC0030000NTC10R104 FCVDR0275000VDR275VRV101 FCVDR0275000

35、VDR275VRV102 FCTERMF28000Faston 2.8mmTS101 FC2H136200001136.02.00WI104 FC2H136200001136.02.00WI105 40-0160-0100 EP05-05 DPA4000T.xls1 of 2 PARTS LIST: PRINTED CIRCUIT 11.1034.02.01 CodeDescriptionReference FC2H137200001137.02.00WI106 FC2H137200001137.02.00WI107 40-0160-0100 EP05-05 DPA4000T.xls2 of

36、2 PARTS LIST: PRINTED CIRCUIT 11.1036.02.01 CodeDescriptionReference FCCE360220002200u/200C101 FCCE360220002200u/200C102 FCCE360220002200u/200C103 FCCE360220002200u/200C104 FCCE360220002200u/200C105 FCCE360220002200u/200C106 FCCE360220002200u/200C107 FCCE360220002200u/200C108 FCCE360220002200u/200C1

37、09 FCCE360220002200u/200C110 FCCE360220002200u/200C111 FCCE360220002200u/200C112 FCCE360220002200u/200C113 FCCE360220002200u/200C114 FCCE360220002200u/200C115 FCCE360220002200u/200C116 FCCE360220002200u/200C117 FCCE360220002200u/200C118 FCCE360220002200u/200C119 FCCE360220002200u/200C120 FCCI0103600

38、0Printed Board 11.1036.02CI102 FCTERM100000Faston 6.3mmJ101 FCTERM100000Faston 6.3mmJ102 FCTERM100000Faston 6.3mmJ103 FCTERM100000Faston 6.3mmJ104 FCRP5533000033k/2 PR02R101 FCRP5533000033k/2 PR02R102 FCRP5533000033k/2 PR02R103 FCRP5533000033k/2 PR02R104 FC0H085350001085.03.50WI101 FC0H071250001071.

39、02.50WI102 FC0H085500001085.05.00WI103 FC0H071500001071.05.00WI104 FC0C051280001051.02.80WI107 FC0C051280001051.02.80WI108 FC0C051350001051.03.50WI113 FC0C051350001051.03.50WI114 FC0H138000001138.00.00WI117 FC0H039350001039.03.50WI118 FC0H039350001039.03.50WI119 FC0H039350001039.03.50WI120 FC0H13800

40、0001138.00.00WI121 FC0H039350001039.03.50WI122 40-0160-0100 EP05-05 DPA4000T.xls1 of 1 PARTS LIST: PRINTED CIRCUIT 11.1038.01.00 CodeDescriptionReference FCCI01038000Printed Board 11.1038.01CI101 FCCTM0003000B3B-EH-AJ101 FCCTM0003000B3B-EH-AJ102 FCPR1100400010kRDR101 FCPR1100400010kRDR102 40-0160-01

41、00 EP05-05 DPA4000T.xls1 of 1 PARTS LIST: PRINTED CIRCUIT 11.1039.01.01 CodeDescriptionReference FCCI01039000Printed Board 11.1039.01CI101 FCTERM100000Faston 6.3mmJ103 FCTERM100000Faston 6.3mmJ104 FCBASS012000NL4MD-HJ105 FCBASS012000NL4MD-HJ106 FCBASS012000NL4MD-HJ107 FCTERM100000Faston 6.3mmJ108 FC

42、TERM100000Faston 6.3mmJ109 FC0H053500001053.05.00WI101 FC0H054400001054.04.00WI103 40-0160-0100 EP05-05 DPA4000T.xls1 of 1 PARTS LIST: PRINTED CIRCUIT 11.1047.01.00 CodeDescriptionReference FCXCD4100000100nC101 FCXCD4100000100nC102 FCXCD4100000100nC103 FCXCD4100000100nC104 FCXCD4100000100nC105 FCXCD

43、4100000100nC106 FCCE1000000047u/16C107 FCCE1000000047u/16C108 FCCE1000000047u/16C109 FCCE1000000047u/16C110 FCXCD2100000100pC111 FCXCD2100000100pC112 FCXCD2100000100pC113 FCXCD2100000100pC114 FCXCD122010022p 2%C115 FCXCD122010022p 2%C116 FCXCD122010022p 2%C117 FCXCD122010022p 2%C118 FCCE1000000047u/

44、16C119 FCCE1000000047u/16C120 FCCDK2001000C1uC121 FCCDK2001000C1uC122 FCCE1000000047u/16C123 FCCE1000000047u/16C124 FCCDK5180000C180nC125 FCCDK5180000C180nC126 FCCDK5180000C180nC127 FCCDK5180000C180nC128 FCCE1000000047u/16C129 FCCE1000000047u/16C130 FCCI01047000Printed Board 11.1047.01CI102 FCXDDBAS

45、2800BAS28D101 FCXDDBAS2800BAS28D102 FCXDDBAS2800BAS28D103 FCXDDBAS2800BAS28D104 FCXDDBAS1600BAS16D105 FCXDDBAS1600BAS16D106 FCLEDSMD2000TLMH3100D201 FCLEDSMD2500TLMY3100D202 FCLEDSMD2000TLMH3100D203 FCLEDSMD3000TLMG3100D204 FCLEDSMD2000TLMH3100D205 FCLEDSMD2000TLMH3100D206 FCLEDSMD2500TLMY3100D207 F

46、CLEDSMD2000TLMH3100D208 FCLEDSMD3000TLMG3100D209 FCIC55322000NE5532AIC101 FCIC55322000NE5532AIC102 FCIC07201000TL072IC103 FCIC07101000TL071IC104 FCBASX090000YKF52-5005J101 FCBASX100000YKF52-5003J102 FCBASX090000YKF52-5005J103 FCBASX100000YKF52-5003J104 FCCTM0012000B12B-EH-AJ105 FCTERM010000Jumper Pi

47、nJ106 40-0160-0100 EP05-05 DPA4000T.xls1 of 3 PARTS LIST: PRINTED CIRCUIT 11.1047.01.00 CodeDescriptionReference FCTERM010000Jumper PinJ107 FCTERM010000Jumper PinJ108 FCTERM010000Jumper PinJ109 FCTERM010000Jumper PinJ110 FCTERM010000Jumper PinJ111 FCCTM0004000B4B-EH-AJ112 FCMJ00010000JumperMJ101 FCM

48、J00010000JumperMJ102 FCMJ00010000JumperMJ103 FCMJ00010000JumperMJ104 FCTR90240000IRFD9024Q101 FCXR55100000100kR101 FCXR55100000100kR102 FCXR55100000100kR103 FCXR55100000100kR104 FCXR52100000100.0R105 FCXR52100000100.0R106 FCXR52100000100.0R107 FCXR52100000100.0R108 FCXR55100000100kR109 FCXR551000001

49、00kR110 FCXR55100000100kR111 FCXR55100000100kR112 FCXR6424300024k3 0.5%R113 FCXR6424300024k3 0.5%R114 FCXR6424300024k3 0.5%R115 FCXR6424300024k3 0.5%R116 FCXR6424300024k3 0.5%R117 FCXR6424300024k3 0.5%R118 FCXR6424300024k3 0.5%R119 FCXR6424300024k3 0.5%R120 FCXR55100000100kR121 FCXR55100000100kR122 FCXR55100000100kR123 FCXR536190006k19R124 FCXR536190006k19R125 FCXR5410000010k0R126 FCXR5410000010k0R127 FCXR531000001k0R128 FCXR531000001k0R129 FCXR531000001k0R130 FCXR531000001k0R131 FCX