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Sony 909ip protect on becase of shorted output was it because i tried soldering while unplug

Unplug for almost a month i solder external hookup and when trying to test unit it instantly when into protect but i dont think i caused short i think audio card or something that looks like the amp its bad any help appreciated

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Posted on Jan 02, 2017

petraman7
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SOURCE: Pioneer D711

Hi...
Is there an access cover with screws in it underneath?
MOst of the receivers have something like that.
I would also check the output PCB assby for shorts or opens.

Posted on Mar 24, 2009

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If the problem disappears, you had a short. Attach speakers one at a time to isolate the cause.

http://www.retrevo.com/support/Sony-STR-DE345-Receivers-manual/id/387bh943/t/2/

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The protect circuit is doing it's job....probably the amplifier
output stage is shorted.....have a technician check it..make
sure any / all bad connects are soldered when chassis is out
for service......................T.

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