Question about Sharp XL-DV60 System
Just found this, hope it helps.
Sharp DVD Micro Theater System XL-DV60 solution Posted by sonny.marquez on Nov 21st, 2008 at 11:46pm
I own a similar system that began to have a "protect" error message when I crank up the volume. Before you proceed, the solution requires you to open up your system by removing the top cover via removal of five screws and opening it up. So IF you are not experienced in opening up electronic equipment I suggest you find somebody who does. The error is caused by the cooling fan being stuck or not able to spin. The system has a sensor wherein, when it detects that the "amplifier" IC heats up, it spins up the fan to cool it down. IF the system detects that the fan is not spinning during the cooling phase, it will give out the "protect" message. Note that it will only spin when you crank up the volume. Less or 0 volume will shut down the fan due to it's "energy star" feature.
To solve the problem, I cleaned out the dust in the system via a 1 inch wide paint brush (haven't tried the compressed bottled air used to clean computers BUT it might do) and nudged the fan. Played the system w/o a cover and observed the fan operation and so far it has solved the issue. I plan to lubricate the fan shaft with very small amount(less than a drop) of machine oil using a syringe. If it doe not work, I plan to see if I could purchase a replacement motor for the fan...
hope this helps....
Posted on Mar 03, 2009
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Feb 13, 2008 | Sony DAV-FC7 System
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 with your output drivers. Please check for short on the outputs 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 which can be 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 or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.
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