Ecler-PAM4100-pwr-sm维修电路图 手册.pdf

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1、 SERVICE MANUAL SIGNAL PROTECT THERMALTHERMAL BRIDGED PROTECT 6 100 1 2 4 3 5 9 8 SIGNAL CLIP 7 1 2 0 3 4 5 9 10 8 CLIP 6 7 ON OFF SWITCHING POWER MOSFET AMPLIFIER CHANNEL ICHANNEL II THERMAL PROTECT SIGNAL PROTECT BRIDGED100 1 2 9 8 SIGNAL CLIP 1 2 010 9 8 CLIP THERMAL 64 3 5 73 5 46 7 ON OFF SWITC

2、HING POWER MOSFET AMPLIFIER CHANNEL ICHANNEL II RadioFans.CN SERVICE MANUAL PAM6100 / 4100 INDEX PAM6100 - BLOCK DIAGRAM - FUNCTIONING DESCRIPTION SCHEMATICS Inputs circuit Power Amplifier circuit Soft-Start Power Supply circuit Potentiometers and leds circuit Capacitors circuit Speak on circuit - C

3、OMPONENTS LOCATION SCHEMA AND PARTS LIST Inputs circuit Power Amplifier circuit Soft-Start Power Supply circuit Potentiometers and leds circuit Capacitors circuit Speak on circuit - TESTING AND QUALITY CONTROL - TECHNICAL CHARACTERISTICS - WIRING DIAGRAM - MECHANICAL DIAGRAM - PACKING DIAGRAM PAM410

4、0 - COMPONENTS LOCATION SCHEMA AND PARTS LIST Power Amplifier circuit - MECHANICAL DIAGRAM RadioFans.CN SHUTDOWN SHUTDOWN INPUT CIRCUIT S.P. OFF CH 2 S.P. 20Hz HIGH PASS FILTER OFF 40Hz 30Hz 20Hz 30Hz 40Hz VCA -Vref VOLUME AC DETECT BRIG MODULES OPTIONAL BRIG PROTECT OUTPUT CONTROL ANTICLIP AND TIME

5、R PROTECTION RELAY OUTPUT CLIP HIGH PASS FILTER CH 1 THERMAL PROCESSOR THERMAL PROCESSOR THERMAL PROTECT FAN CONTROL THERMAL OPTIONAL STEREO MODULES PROBE TRANSFORMER PROBE MODULE THERMAL -Vref VCA THERMAL ADJ 0dB CONTROL VOLUME FAN CROWBAR POWER MODUL CIRCUIT OUT 2 POWER MODUL CIRCUIT LEVEL CONVERT

6、ER DRIVERMOSFET N OVERLOAD LOW SIDE -Vcc LEVEL CONVERTER FEEDBACK DRIVERMOSFET N MIRROR WILSON CURRENT ZOBEL DC PROTECT HIGH SIDE OVERLOAD OUT 1 +Vcc +Vcc +15V RadioFans.CN author:Queraltdate:010418project:EP04-99product:PAM4/6100 approved: num:52.0010version:01.00 title: FUNCTIONING DESCRIPTION ECL

7、ER EPO4-99 Power Module. Functioning description. Due to the high power level required on the output load, the amplifier final stages structure differs from the design used untill now. This is due to the breakdown voltage limit on P-channel MosFETs, wich is 200V. This final stage is formed by severa

8、l 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 operational amplifier, wich is internally compensated in order to obtain gain levels equal or higher

9、than three. The amplifiers feedback is given by a resistor and a capacitor associated to the operational amplifiers non inverting input. Transistors BF587 and BF588 are common-base configured, forming a current supply structure. This specific transistor type is used because of the higher Vce voltage

10、 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 tranfer the OpAmps output voltage variations referred to signal ground. The signal variations normally reflected by Q107 and refer

11、red to the positive power supply, are now needed to be floating variations, and referred to the outputs. This function is done by Q109-110 (BF588), wich are mounted formig a Wilson-type mirror current supply. This mirror current supply transfers all of the current variations detected while descendin

12、g 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 forcibly the same beta value. C138 and C141 suppress their resistance when high frequency signal is

13、 processed. Diodes D126 and D127 avoid the transistors to get saturated, and R171 eliminates the loads on BF588s bases (Baker Circuit). The system requires about 12Vdc additional voltage upon the usual Vcc level, this allows a correct saturation and a symetric clipping at the higher MosFETs. The cor

14、rect 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 th BF transistors loading resistors. In order to maintain the appropiate stand-by current level against varying temperature cond

15、itions, 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 temperature rises, the reference voltage level decreases, the gate-source voltage also decreas

16、es and, finally, the bias current also decreases. 52-0010-0100 EP04-99 Angls.xls 1 of 3 RadioFans.CN Transistors Q111 and Q112, and their corresponding twins at the lower branch, form a current-buffering circuit wich allows a fast charge and discharge of the power MosFETs gates. The Zobel circuit, a

17、 resistance-capacitance-inductance formed network associated to the amplifiers ouput, tries to keep the amplifiers output load impedance constant no matter wich load value is conected to the output, or wich frequency is processed, in order to avoid phase shifts on the feedback signal. To avoid the p

18、resence of DC voltage on the output, a diac-triac based system is used, wich 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 diac obtains its reference level from a filteri

19、ng network formed by a 100K resistor and a 1mF 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. When the MosFETs Id level rises above a certain l

20、evel, transistor Q119 (controlling transistor) 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. Thi

21、s capacitor starts to charge when a current 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-so

22、urce voltage and thus the Id current value. This system uses a feedback network. The delay used is necessary to avoid clipping the processed signals dynamic range, wich should result in the typical clipping noise. In the negative branch, the protection circuitry is associated to control transistor Q

23、120. In case the overcurrent is not ocassional, 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 circuitr

24、y. When protections get activated, IC113 gradually charges C124 untill 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 annulates any current th

25、rough the MosFETs during this period, just untill 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. 52-0010-0100 EP04-99 Angls.xls 2 of 3 RadioFans.CN Thisdelayt

26、imeisachievedbyusingaRCcell,whereR135=287Kand C119=47mF/50V. As this cell charges, its voltage increases untill 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=47m

27、F can be done by cutting off the power supply, or by triggering the Thermal or other protections. During a short period of time, BC817-type transistor Q102 acts like a switch, shunting two 750 ohm resistors to C119. Moreover, the amplifier includes some other additional features, like: Volume contro

28、l by a VCA system. An ANTICLIP system. A Temperature control system. The ANTICLIP system. 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. Th

29、is peaking pulses are used to be rectified and sent to an optocoupler (IC111), wich varies the systems VCA control voltage as a function of those pulses amplitude, creating a negative feedback wich should pull back the system into stable functioning area. The Temperature control system has three mai

30、n functions: Controlling the cooling fan speed, as it is a function of the measured temperature. The fans operation voltage range is 7 to 4 Volt. Suspending the amplifiers functioning when the temperature exceeds 92C Reducing the amount of power output, depending on the modules temperature (as it ri

31、ses above 85C) and on the main power supplys transformer (above 120C). The temperature control system consists on two LM35D-type ICs, wich 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 amplif

32、iers, a comparator for the thermal probe and a 7805-type IC to feed the cooling fan 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.

33、 The third amplifier (1/4 IC114) modifies the VCA gain control, in order to reduce 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 a

34、mplifiers MosFETs bias current. As this happens, the signal output of the whole unit is cutted off. 52-0010-0100 EP04-99 Angls.xls 3 of 3 RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN RadioFans.CN PARTS

35、LIST: PRINTED CIRCUIT 11.0833.04.00 QCodeDescriptionReference 1FCCE25047047u/50C100 1FCCE25047047u/50C101 1FCCE25047047u/50C102 1FCCE25047047u/50C103 1FCXCN41000100nC104 1FCXCN41000100nC105 1FCXCN41000100nC106 1FCXCN41000100nC107 1FCXCN41000100nC108 1FCXCN41000100nC109 1FCXCN41000100nC110 1FCXCN4100

36、0100nC111 1FCXCN21000100pC112 1FCXCN21000100pC113 1FCXCN21000100pC114 1FCXCN21000100pC115 1FCXCN1220122p 2%C116 1FCXCN1220122p 2%C117 1FCXCN1220122p 2%C118 1FCXCN1220122p 2%C119 1FCCE25010010u/50C120 1FCCE25010010u/50C121 1FCXCN42200220nC122 1FCXCN42200220nC123 1FCXCN42200220nC124 1FCXCN42200220nC12

37、5 1FCXCN42200220nC126 1FCXCN42200220nC127 1FCCIPAM83311.0833 Printed BoardCI100 1FCXDDBAS28BAS28D100 1FCXDDBAS28BAS28D101 1FCXDDBAS28BAS28D102 1FCXDDBAS28BAS28D103 1FCXDDBAS16BAS16D104 1FCXDDBAS16BAS16D105 1FCIC553200NE5532APIC100 1FCIC553200NE5532APIC101 1FCIC072010TL072IC102 1FCIC072010TL072IC103

38、1FCIC071010TL071IC104 1FCBASX0900YKF52-5005J100 1FCBASX1000YKF52-5003J101 1FCBASX0900YKF52-5005J102 1FCBASX1000YKF52-5003J103 1FCCTM00040B4B-EH-AJ104 1FCCTM00070B7B-EH-AJ152 1FCCHK0068068uHL100 1FCCHK0068068uHL101 1FCCHK0068068uHL102 1FCCHK0068068uHL103 1FCMJ000100JumperMJ106 1FCMJ000100JumperMJ107

39、1FCXR151000100k0R100 1FCXR151000100k0R101 40-0065-0205 EP04-99B.xls1 of 3 RadioFans.CN PARTS LIST: PRINTED CIRCUIT 11.0833.04.00 QCodeDescriptionReference 1FCXR151000100k0R102 1FCXR151000100k0R103 1FCXR121000100.0R104 1FCXR121000100.0R105 1FCXR121000100.0R106 1FCXR121000100.0R107 1FCXR24243024k3 0.5

40、%R108 1FCXR24243024k3 0.5%R109 1FCXR24243024k3 0.5%R110 1FCXR24243024k3 0.5%R111 1FCXR24243024k3 0.5%R112 1FCXR24243024k3 0.5%R113 1FCXR24243024k3 0.5%R114 1FCXR24243024k3 0.5%R115 1FCXR1310001k0R116 1FCXR1310001k0R117 1FCXR11562056.2R118 1FCXR11562056.2R119 1FCXR1310001k0R120 1FCXR1310001k0R121 1FC

41、XR153400340kR122 1FCXR153400340kR123 1FCXR07100010MR124 1FCXR07100010MR125 1FCXR14182018k2R126 1FCXR14113011k3R127 1FCXR1390909k09R128 1FCXR1315001k50R129 1FCXR14182018k2R130 1FCXR14113011k3R131 1FCXR1390909k09R132 1FCXR1315001k50R133 1FCXR14750075k0R134 1FCXR14750075k0R135 1FCXR14475047k5R136 1FCXR

42、14475047k5R137 1FCXR14365036k5R138 1FCXR14365036k5R139 1FCXR07100010MR140 1FCXR07100010MR141 1FCXR14365036k5R142 1FCXR14365036k5R143 1FCXR24243024k3 0.5%R144 1FCXR24243024k3 0.5%R145 1FCXR14182018k2R146 1FCXR14182018k2R147 1FCXR11562056.2R148 1FCXR11562056.2R149 1FCXR24243024k3 0.5%R150 1FCXR2424302

43、4k3 0.5%R151 1FCXR1315001k50R152 1FCINTAP080NS42J11S100 1FCINTD7500SS050S101 1FC6K0584601058.04.60WI102 40-0065-0205 EP04-99B.xls2 of 3 RadioFans.CN PARTS LIST: PRINTED CIRCUIT 11.0833.04.00 QCodeDescriptionReference 1FC6K0584601058.04.60WI103 40-0065-0205 EP04-99B.xls3 of 3 RadioFans.CN RadioFans.C

44、N RadioFans.CN RadioFans.CN RadioFans.CN PARTS LIST: PRINTED CIRCUIT 11.0730.07.01 QCodeDescriptionReference 1FCCE20022022u/35C101 1FCXCN44700470nC102 1FCXCN44700470nC103 1FCCDK11000C100n/63VC104 1FCXCN44700470nC105 1FCCE25010010u/50C106 1FCCE2110001000u/35C107 1FCCE2110001000u/35C108 1FCCE25047047u

45、/50C109 1FCXCN41000100nC110 1FCXCN41000100nC111 1FCCE25047047u/50C112 1FCCE25047047u/50C113 1FCCE3000222.2u/63C114 1FCXCN400101nC115 1FCCE25010010u/50C116 1FCXCN41000100nC117 1FCCE25010010u/50C118 1FCCE25047047u/50C119 1FCCE154700470u/25C120 1FCCG001000T10uF/35C121 1FCCG001000T10uF/35C122 1FCXCN4100

46、0100nC123 1FCCE20022022u/35C124 1FCXCN1220022pC125 1FCCE25047047u/50C126 1FCCE25047047u/50C127 1FCXCN21000100pC128 1FCXCN1220022pC129 1FCXCN1220022pC130 1FCXCN1150015pC131 1FCCE25010010u/50C132 1FCCE25010010u/50C133 1FCXCN44700470nC134 1FCXCN1120012pC135 1FCXCN1120012pC136 1FCXCN44700470nC137 1FCXCN

47、44700470nC138 1FCXCN1220022pC139 1FCXCN1220022pC140 1FCXCN44700470nC141 1FCCDN11000C100n/250VC142 1FCCDN11000C100n/250VC143 1FCCDN11000C100n/250VC144 1FCCE35004747u/200C145 1FCCE35004747u/200C146 1FCCDN11000C100n/250VC147 1FCCDN11000C100n/250VC148 1FCCE35004747u/200C149 1FCCE20022022u/35C150 1FCCE35

48、004747u/200C151 1FCCDK11000C100n/63VC152 1FCCDH71047C47n/400VC153 1FCCDN11000C100n/250VC154 1FCCDN11000C100n/250VC155 1FCCE35004747u/200C156 40-0065-0206 EP04-99B.xls1 of 11 RadioFans.CN PARTS LIST: PRINTED CIRCUIT 11.0730.07.01 QCodeDescriptionReference 1FCXCN41000100nC157 1FCXCN41000100nC158 1FCCE

49、35004747u/200C159 1FCXCN400101nC160 1FCXCN400101nC161 1FCXCN400222n2C162 1FCXCN400222n2C163 1FCCE2133003300u/35C164 1FCCDH71011C10n/400VC165 1FCCDK20010C1u/63VC166 1FCXCN41000100nC167 1FCXCN41000100nC168 1FCXCN41000100nC169 1FCXCN41000100nC170 1FCXCN41000100nC171 1FCXCN44700470nC172 1FCCE2000474.7u/35C173 1FCCE2000474.7u/35C174 1FCCE2110001000u/35C175 1FCXCN41000100nC176 1FCPERL2550Cer. BeadCB101 1FCPERL2550Cer. BeadCB102 1FCPERL2550Cer. BeadCB103 1FCPERL2550Cer. BeadCB104 1FCCIPA