transistor amp not working after shorting output

[sg97]

That resistor is indeed 47ohm i maybe made a mistake before so what i should do now ?

 

[Wakh]

Check for connection. Check the direction of 2 diodes

 

[sg97]

it is like that

 

[sg97]

@sg97, In post #44, there was a resistor that was no value reading, did you replace it?
View attachment 1257260
In post #57, one of the two 220Ω resistors showed 320Ω, did you replace it?
View attachment 1257265

I also noticed that when you measure the voltage in post #489, the black probe is not on the ground trace.
View attachment 1257257

btw mostly those are old pictures so check one i posted today for correct values of components

 

[chrisng]

Have you replaced the diode?

 

[Wakh]

The diodes in the last photo are not connected in series. One needs to be 1 diode turned on the other way around.
But I can’t say which one, since the photo is very close and the rest of the details are not visible. 🙂

 

[sg97]

does this help ? btw yes i changed that diode with same one and same orientation as previous one

 

[sg97]

this is old picture btw

 

[gijser]

What about measuring the voltage across the diodes /resistor string, or has that been done already? should be around 2 volts.

 

[Wakh]

 

[sg97]

its 1.7v

 

[gijser]

OK, and what is the voltage across just the 47 ohm resistor ?

 

[sg97]

0.4v

 

[gijser]

That seems allright actually. The problem must be elsewhere..🙁

 

[sg97]

i agree but where xd

 

[chrisng]

Please measure this two points the voltage.

 

[sg97]

9v

 

[Wakh]

 

[sg97]

should i flip whole stack ?

 

[Wakh]

Are you small?
Can't do anything without your mom?