英语翻译第二步：用万用表测复合管和LM4702对散热片的绝缘电阻应无穷大。将两个可调电阻顺时钟旋到最小。第三步：接入电源

英语翻译
第二步：用万用表测复合管和LM4702对散热片的绝缘电阻应无穷大。将两个可调电
阻顺时钟旋到最小。
第三步：接入电源，接电源时特别要注意电源的极性，如果电源接反将永久性烧坏集
成电路和功率管，具体接洁如图所示。
第四步：上电，先不接喇叭，两音频输入端对地，输出端接上8欧的假性负载，给功
放板上电，用万用表（200MV 档）测功放输出端电压，正常功放中点电压应在10MV以
否则功放板有故障，不能进行下一步调试。修复故障后方可进行下一步调试。
第五步：调末级功率管的静态电流，该电流值可以通过测功率管的发射极电阻的电压
换算而得到。万用表接SAP15N/P的S脚和E脚，测量档位拨到MV档，调整可变精密电
阻使功率管发射极电阻压降为25MV 左右。这个值是厂家推荐值，发烧友可以根据自己要
求修改这个值，静态电流越大，音质更温暖，更接近胆机音质。静态电流调大时应注意散
热器发热情况
第六步：接上喇叭，接入音频，煲机二个小时，重测功率管发射极电阻压降，是否还
在25MV 左右，否则调节可变电阻，使其恢复到20MV
第七步：逆时针旋转可变电阻，可变电阻的阻值变小，功率管的静态电流变小。为安
全起见，功放板出厂时这个精密电阻已调至最小

Step two:measure with a multimeter and LM4702 composite pipe insulation resistance of the heat sink should be infinite.Two adjustable power
Block clockwise rotation to a minimum.
Step three:Access the power,connect the power supply when particular attention to the polarity,if the power connection will be permanently burned set of anti-
Into the circuit and power management,the specific access clean as shown.
Step four:power,the first speaker is not connected,the two audio input ground,output terminated on 8 Europe dummy loads,to the power
Electric discharge board,with a multimeter (200MV file) measuring amplifier output voltage,normal voltage should be 10MV amplifier to the mid-point
Inside.Otherwise,amplifier board is faulty,not the next step debugging.After the repair before the next step debugging.
Step five:tune the final stage power transistor quiescent current,the current value of the power tube by measuring the voltage of the emitter resistance
Converter and get.Multimeter connected SAP15N / P and E S-foot foot,measuring stalls appropriated for MV file,adjust the variable precision electric
Resistance to resistance power transistor emitter voltage drop to around 25MV.This value is the manufacturer recommended values,enthusiasts can own to
Seeking to change this value,the static current increases,the sound warmer,closer Dan Ji quality.Adjust the quiescent current should pay attention to San
Heat fever cases
Step Six:Connect speakers,access to audio,burn machine two hours,re-testing power transistor emitter resistor voltage drop,is also
In 25MV around,otherwise adjust the variable resistor,to return to 20MV
Step Seven:Turn the variable resistor,variable resistor smaller quiescent current of power tube smaller.For safety
All purposes,the amplifier board precision resistors in this factory has been to the minimum.