Question about Audio Players & Recorders
I was adjusting the m speaker b source. while i was turning through the various sources, a message "protect" displayed on the front of the amplifier, and now no lights show on the front. The amplifier still works, but I am not able to view the display. The manual just says to call for servicing. Can you help?
Ya, it sound like you just blowed the output on one of the stages, I would disconect the speakers to see if the problem still is there, second open the top cover, there should be about 7 fuses check for a blowed one, last hope it's not an output, if you never worked on an amp, you will cause more problem.
Hope this help
Bob The builder
Posted on Feb 08, 2008
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Posted on Jan 02, 2017
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It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.
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It sounds like you're guessing.
Register and download the manual for free at retrevo.com
Also check in with the DVD manual.
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