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I have the main head unit to the micro theatre mcd139/37 with out any of the other components like speakers which is the power supply for the dvd player. can i directly wire a power supply to it?

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Yes but you have to know the voltage then buy the right adapter

Posted on Dec 09, 2008

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Check the degaussing posistor. If any magnetic material, like speaker boxes of any cheap home theatre (Chineese made), do not have magnetic shield inside the speaker box have been placed by the side of the TV, can cause this problem too. Check it. It will be best to contact any service technician.
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The component I showed here "degaussing posistor" will look somewhat like this, and can be located at the main power supply regulator section circuit of the TV. If you wish to get more details, check this link.http://electronicshelponline.blogspot.com/

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I HAVE A 1994 BUICK GRAND SPORT. I WANT TO HOOK A STERIO UP BUT THE STERIO THAT CAME WITH THE BUICK HAS A DOUBLE COMMPONET SET UP . HOW DO I BYPASS THAT AND HOOK UP THE CD PLAYER TO THE SPEAKERS?


1) Understand the basics of all car stereo systems. A car stereo system consists of 4 main components and the wiring that connects them. These are the head unit, the main speakers, optional amplifiers and the subwoofers, which are also optional but generally considered a necessary part of any good system. 2) Know that the core of any car stereo is the head unit, which is the cassette or CD player that goes in the dash. All the other components are connected to the head unit by at least one pair of wires. 3) Know about car speakers. The main speakers are usually 2 in the front and 2 in the back, although with what are known as component speakers, each speaker is broken down into two speakers: one for the highs and one for the bass. Each speaker or speaker set (known as a channel) connects to the head unit via a pair of wires. Generally if you are installing a new head unit you want to install new speakers. 4) Know about amplifiers. Amplifiers provide extra power to your speakers and/or extra channels of power for additional speakers. The most common use for an amplifier (amp) is to power subwoofers. The amp connects to your head unit via an RCA cable and often a "remote on" wire, and also connects directly to your car battery through a fused "hot" wire and to the car's chassis with a short ground wire. This article assumes the use of a single amplifier connected to a pair of subwoofers. If you do not have these components simply ignore the steps specific to the amp, doing so will not affect the rest of your installation. 5) Know about subwoofers. Subwoofers are part of any good stereo system. They provide the deep bass that small speakers cannot achieve. Subwoofers are connected to the amplifier which can usually be mounted right to the subwoofer box. If you do not have subwoofers you can simply ignore the steps specific to them. FOR more help click on this link directly http://www.ehow.com/how_5829_wire-car-stereo.html ------ This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

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I fixed the same issue by replacing the original AC power supply with a 13.8 volt DC power supply (Radio Shack) It seems to be more consistent at high SPL and no hum , as the Boston acoustic unit accepts either AC or DC power.

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Nice player. I'm not lucky enough to own one myself, but I found this info which might be worth a try:

Kef Kit 100 & Kef Kit 200 Instant DVD Theatre handset hacks 1. Press & hold the "Skip Back" button, "Play" button & "Volume Up" button on the main unit.
2. After a few seconds the front display should display "PAL RESET"
3. Release the "keys.
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5. After 20 seconds, power on your DVD player, thats it!

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Unplug all of the speakers and power on.Its possible that one of the speakers is causing the protection circuit to activate.If powered on and subwoofer works start reconnecting one speaker at a time( after powered off) and retest each time.One Speaker may be bad.Its also possible the output ic is failing under a speaker load.There are no fuses related to this issue.If its not a speaker problem then the subwoofer will need to be serviced.

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Toshiba SD 5700 DVD


Hi RC hobby,

Sounds like you have a faulty power supply or logic board. The later is most likely. Once the unit get warmed up the component tolerance become critical to it's performance. If an ageing component is starting to fail then then normally happens once it fairly warm. The reverse can be true, it just depends on what type of part is failing.

I'd check the it's internal power supply for signs of faulty capacitors. However, you do so at your own risk. See this website for details on identifying bad capacitors. Please read the safety warning on the back of the unit before opening. Ensure the unit is unplugged from your mains supply.

Please don't forget to to leave feedback.

Hope this helps,

Spare head 2

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This is probably a setting problem on your remote-the unit will ony give full surround sound on Movies like dvd-on TV you may not get all speakers going as the cable does not provide signals to drive all speakers-check your manual and change to the appropriate setting-pro-logic is bad for this-will not give sound to all speakers unless the signal tells it to.

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