I've build the suggested schematic on pdf file of datasheet.
But i've the following trouble...
1) Turn on my PSU +/-24V
2) All wire connected (input/output)
The trouble is here...
I give +5v at pin3 and for a second it seems to give the right power to the speaker and immediactly after it goes at lower volume with a little tendency to give high frequency as output...
I hope to have be clear....
Some suggestions?
But i've the following trouble...
1) Turn on my PSU +/-24V
2) All wire connected (input/output)
The trouble is here...
I give +5v at pin3 and for a second it seems to give the right power to the speaker and immediactly after it goes at lower volume with a little tendency to give high frequency as output...
I hope to have be clear....
Some suggestions?
MaXiZ said:Are the red polarity correct?
Yes
MaXiZ said:And if it's alway connected to negative it's always in stand by....
Do you have (-) of C3 connected to neg rail supply?
What is the voltage of your transformer? You may have to lower the supply voltage.
absolutely yes!Do you have (-) of C3 connected to neg rail supply?
THe original output is around +/-40v but with this (http://sound.westhost.com/project102.htm) i take it down to exactly +/v24..What is the voltage of your transformer?
It is likely to be something simple. Lets start eliminating possible problems.
1 make sure all cap are connected properly(polarity)
2 check all ground wiring
3 measure resistance at pins(between pin and ground)
4 C1 bewteen R1 and pin 7(not R1 and ground)
5 measure at pins 5and 7 : bewteen pins 1 and 6 and bewteen 1 and the (+) of C2
1 make sure all cap are connected properly(polarity)
2 check all ground wiring
3 measure resistance at pins(between pin and ground)
4 C1 bewteen R1 and pin 7(not R1 and ground)
5 measure at pins 5and 7 : bewteen pins 1 and 6 and bewteen 1 and the (+) of C2
Dont connected any. Only check the resistance bewteen the pins,You know what the resistance should be.
I looked at the picture you posted everything seem OK. The only thing I see that maybe a fault is a possible connection bewteen pin2 and 3(look inside the square).
Have you built more than one?.
You make just have a bad chip. It happens.
Were is the +5V for pin 3 coming from?
I looked at the picture you posted everything seem OK. The only thing I see that maybe a fault is a possible connection bewteen pin2 and 3(look inside the square).
Have you built more than one?.
You make just have a bad chip. It happens.
Were is the +5V for pin 3 coming from?
jaudio said:
Have you built more than one?.
You make just have a bad chip. It happens.
I will go over the schematic and pictures again. I may have missed something.
MaXiZ said:Or i'll try to build some p3a with right output transistor
What is p3a?
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