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Old 02-13-2018, 12:46 PM   #28
seve91
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Join Date: Oct 2013
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Default Re: Philips FR-740 working but no audio output

Quote:
Originally Posted by R_J View Post
I don't think the cpu is bad, but something is preventing it from turning on the amp.
and how i can find the fault?

I found out a strange thing when measuring pin 6 with the oscilloscope probe.
If i connect the ground of the probe to the chassis of the device, i got 0V.
If i disconnect the ground of the probe (and i leave it free, without connecting) it detects this signal from pin 6.
How is it possible?

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