Question about GPX DV7500 System

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Gpx dv7500 dvd player will not power on

It has been working fine for a couple of years, not used too often. Today we tried to turn it on. It powers up for a few seconds and then turns off permanently. It does this once each time it is newly plugged in . Never had an appliance that behaved this way. We just watched a dvd a few days ago. thanks for any advice

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I've seen this problem before with devices that have audio amplification circuitry.

In the cases I've seen, the connections to the speakers were the culprits.

First of all, you should only use the GPX speakers that came with the device. I don't know what their impedance is, but if it was 8ohms, you should only use 8ohm speakers. The same for 4 ohm, 6 ohm, etc. The safe bet is to use the speakers that came with the system.

If you are using the intended GPX speakers, and they're hooked up correctly, (only one speaker per output) then I would suspect a short in at least one of the speaker wires.

Amplification circuits apply fluctuating power to the speakers which correlate the sound wave. The power reaches the speaker, has an electromagnetic effect on the speaker cone, which pushes it out or pulls it in. This produces sound. The speakers job is to be affected by the amplifier, and convert the electric power into a mechanical movement. Speakers of different impedances respond to different levels of power. Ideally, your amplifier will supply power to speakers that will use it all up and return none.

An amplifier designed to drive 8 ohm speakers will get too much kickback from little 4 ohm speakers. When I've seen this sympton before, the amplifier had another circuit designed to monitor dangerous conditions such as this and shut down to prevent permanenet damage. Another dangerous condition might be a short in one or more of the speaker wires. Inspect each and make sure none got stuck under the table, or slammed in a drawer or pinch by a staple or whatever.


Posted on Nov 02, 2008

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Don't buy Chinese **** and you won't have problems like that

Posted on Mar 21, 2008


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