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Old 10-15-2017, 10:59 AM   #24
Join Date: Oct 2013
City & State: AN
My Country: Italy
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Posts: 67
Default Re: Philips FR-740 working but no audio output

Originally Posted by R_J View Post
I think +4.4 for the amp protect line is for normal operation, I suspect a low would tell the amp to be in protect?
If the amp lr line is not high (+5 volts) then the amp on circuit will not be told to turn on, I can't see what conditions need to be met for the micro to say turn on the [amp lr] line?
It looks like the voltages marked on the schematic are for normal operation (bottom right of page 80)
Do you have the remote? can you turn the Mute on and off?

It sure looks like something in the menu somewhere has turned the amp off
Yes i can turn MUTE on and off with the remote. In the menu there are not many options...volume is balanced to 0 for all the speakers.
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