Yamaha YPT-220 / PSR-E223 No sound, powers on

[jackvonthor]

Hello everybody!

I have Yamaha YPT-220 / PSR-E223. It powers on, respond to keys (i can see on the display that the proper keys are pressed). Unfortunately, there is no sound at all. I checked on headphones, speakers - nothing, no humming etc. Dead silent.

I read on one of the forums that replacing BA5417 might help, but after the replacement everything is still the same - no sound.
What could cause the problem? I checked and found out that two capacitors are shortened... I don't think they should be, but I am not sure (I am not a proffesional electronic technician, but I know how to replace resistors, capacitors, IC's etc).

Here is the video of the two elements that I found out are shortened...

What are your suggestions? What could help and what else should I check?

Thank you.

 

[delaware dave]

Did you check the Op Amp circuit?

 

[jackvonthor]

How can I do that? I am not a professional repair technician, but I know the basics on how to use voltage meter and replace electronic elements.
Can you please give me a hint how to check that? I would be really greatful

 

[happyrat1]

Judging by your experience level, this would be the best place to start.

Randomly replacing components will never effect a repair and could also create more problems.

EEVblog Electronics Community Forum - Index

EEVblog Electronics Community Forum - Index

www.eevblog.com

https://www.youtube.com/results?search_query=testing+audio+circuits

Everyone has to start learning somehow.

Gary

 

[Aizyk]

Hello everybody!

I have Yamaha YPT-220 / PSR-E223. It powers on, respond to keys (i can see on the display that the proper keys are pressed). Unfortunately, there is no sound at all. I checked on headphones, speakers - nothing, no humming etc. Dead silent.

I read on one of the forums that replacing BA5417 might help, but after the replacement everything is still the same - no sound.
What could cause the problem? I checked and found out that two capacitors are shortened... I don't think they should be, but I am not sure (I am not a proffesional electronic technician, but I know how to replace resistors, capacitors, IC's etc).

Here is the video of the two elements that I found out are shortened...

What are your suggestions? What could help and what else should I check?

Thank you.

I had the same problem. I took a multimeter and checked the capacitors in the ringing mode, one turned out to be punched. See the photo.