Hello everyone , I'm new here and seeking any advice .
I'm having a slight distortion mainly on the high freq. on the right channel.
*.All electrolytic caps were replaced to new .
*.Swapped the input wires from Pre-Amp boards to determine the fault = result is the Power Amp section .
*.Swapped the 4 transistors on the Power Amp boards between channels .
*.Swapped the 3 chassis mounted driver transistors between channel.
*.Swapped the OUTPUT transistors .
No luck still 🙁
Any ideas where to check what to do , I'd be really thankful!
I'm having a slight distortion mainly on the high freq. on the right channel.
*.All electrolytic caps were replaced to new .
*.Swapped the input wires from Pre-Amp boards to determine the fault = result is the Power Amp section .
*.Swapped the 4 transistors on the Power Amp boards between channels .
*.Swapped the 3 chassis mounted driver transistors between channel.
*.Swapped the OUTPUT transistors .
No luck still 🙁
Any ideas where to check what to do , I'd be really thankful!
did you check all capacitors
https://www.dropbox.com/sh/xsiniqkyjkd0ap8/AAB4tM3LU4EqUB8BoP0UWn8fa?dl=0
https://www.dropbox.com/sh/xsiniqkyjkd0ap8/AAB4tM3LU4EqUB8BoP0UWn8fa?dl=0
The pre-amps are O.K so I will be checking only capacitors of the power amp boards.. these lollipop caps are so old and I didn't replace them..
Yes I did.. it's the channel.
Thanks
checked capacitors and they all give good capacitance as should..
Still dealing with the problem..
Still dealing with the problem..
You really need an o'scope and signal generator for this job. You have no idea what the distortion is without one.
Craig
Craig
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