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Help to diagnose my pcb

5 years 8 months ago #1474 by Ray
Replied by Ray on topic Help to diagnose my pcb
Good to see that you are progressing :woohoo:

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5 years 8 months ago #1475 by jimt
Replied by jimt on topic Help to diagnose my pcb
I am getting some mV on amp :(

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5 years 8 months ago - 5 years 8 months ago #1477 by Ray
Replied by Ray on topic Help to diagnose my pcb

I am getting some mV on amp :(

what do you mean? I do not fully get it

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5 years 7 months ago - 5 years 7 months ago #1517 by jimt
Replied by jimt on topic Help to diagnose my pcb

Ray wrote:

I am getting some mV on amp :(

what do you mean? I do not fully get it


I done resoldering again thanks to amtech paste, it was more easier. I am done with this problem I can get 4.92V and 2.431V on test pins.On the other hand, op-amp on 4 and 8 pins gives 0.738V . I also test the buttons with monitor and button switch 1 and toggle switch doesn't work. I test the pedal but gives again a noise without anything else.


Thank you for your time again

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5 years 7 months ago #1520 by jimt
Replied by jimt on topic Help to diagnose my pcb
ok I desolder the socket and solder amp on pcb straight away, now I got 4,85V on pins 4 and 8 :D lol I am so happy, I will try it now

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5 years 7 months ago #1523 by Ray
Replied by Ray on topic Help to diagnose my pcb

4.81 at 2.5V

check that 2.5V is just a voltage divider, have a close look to that area, without the 2.5V reference voltage the audio won't get through!

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5 years 7 months ago #1524 by jimt
Replied by jimt on topic Help to diagnose my pcb
sorry for my silly response I have this problem too :
"I also test the buttons with monitor and button switch 1 and toggle switch doesn't work"

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5 years 7 months ago #1529 by Ray
Replied by Ray on topic Help to diagnose my pcb

I resolder all components again because two pcb to make double layer is not so easy, because solder doesn't goes on two sides.

yes I know what you mean, I did that before and you have to almost check every single lead to make sure that it is soldered on both sides of the PCB.

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