1, the output voltage of the full wave rectifier circuit U 0 (average value) is related to the load. The input voltage of the rectifier is set to U2 (RMS), the peak value is U2m, and the internal resistance of the rectifier is Ri. 1, set the load as resistance RL, open circuit voltage U0= 0.9U2, if Ri can be ignored, the load voltage is also U0.
2, the higher the voltage and power,It also depends on the structure of the power amplifier board, but the power of the transformer can not be less than the power of the power amplifier board.
3, the output voltage of the power amplifier is about 0-50 volts, which is related to the volume potentiometer, the volume is large, the volume is small, the output is small. In the audio part, the audio output of the HD player is connected to the audio input port of the power amplifier, and the power amplifier is directly connected to the speaker with a transparent audio cable.
4, the negative amplifier tube is damaged. It was a transformer that was fired after one of the channels failed. The circuit of the discrete component needs to be checked step by step to determine the fault location, and simple replacement is not easy to solve the problemQuestion.
5, This voltage depends on the power output of the amplifier. General power amplifier in 0-50V range. However, when the output voltage is 50V, the power is certainly a lot. The audio amplifier is actually to amplify the smaller audio signal, increase its power, and then output.
6, the output voltage U is related to its output power P and output impedance Z, U=√ (P*Z). For example, the voltage of the 10W and 8Ω ports is 9V, and the voltage of the 25W16Ω ports is 20V. How to connect the power amplifier board of
Connection method: Connect the adjacent end of the two potentiometers at either end of the potentiometer and ground it, the two feet in the middle are connected to the input end of the two amplifiers, and the other two ends are connected to the output end of the former amplifier.
As you described, this resistor is internally welded, this resistor is damaged and can only be replaced.
How many V voltage is connected to the above line. Depending on your circuit parameters, or look at the original transformer. If notNE5532 is all fever grade.
Maybe the only thing you want to laugh at is the right channel schematic diagram written on paper, and the analog signal source on the diagram is DAC_L. Shouldn't the right channel be identified as DAC_R? Take the time to talk to this design engineer. It's not a big deal, but it's cool.
Minimal external components simplify circuit design, save board space, reduce production costs, and can operate under low voltage conditions (0V-5V). The HXJ8002 does not require coupling capacitors, bootstrap capacitors, or buffer networks, so it is ideal for low volume and low weight applicationsIn a low-power system.
Diode: The most used is to use its one-way conductivity, and there are many categories of diodes, such as voltage regulator, light-emitting diode, rectifier diode and so on.
Other circuit boards are generally of this structure. This is the basic power amplifier pin. If it is a 5-pin power amplifier integration such as TDA2030 or TDA2003 or LM1875, an external circuit is required; 1 pin positive input, 2 pin reverse input, 3 pin negative power supply, 4 pin output 5 pin positive power supply.
XA8002D output 3W power at 5V supply voltage and 10% distortionThe pin order of the audio power amplifier chip is the first pin under the dot mark, and then the first pin is arranged in counterclockwise order. Typical applications are shown below.