[geoff]

On 3/08/2019 9:52 PM, Paul wrote:
On 8/2/2019 5:46 PM, Scott Dorsey wrote:
John WilliamsonÂ* wrote:

Please check Phil Allison's previous posting record. He has a habit of
accusing others of suffering from his own shortcomings. While he has a
reasonable knowledge of certain aspects of the audio business, he shows,
when posting, personality problems which vary in seriousness for no
apparent reason. He is banned from many usenet and other social media
groups for this reason.

This is true.

Now, he does have a good point that the original poster likely doesn't
have the right equipment or skills to diagnose the problem.Â* But....
everybody has to start somewhere and if you don't try you'll never learn.


Â*Â*Â* I've got a Tektronix 465M o'scope, a digital multimeter, and an ESR
meter.

Â*Â*Â* What more do you need?

Maggy-lamp for a quick check on things before diving in. Check
switching transistors and PWM controller chip for cracks in casing. Also
some have a opto-isolator than can blows up.

geoff