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AKAI DVD PLAYER FIXING

Dear Sir,


I have AKAI DVD Player P5570SLK. Two days before it was showing a message "No Disc' after inserting the disc. I had tried several discs including originals but was not functioning.

After opening the cover of the player with power on, a screw accidently fall on the highlighted portion of the attached power supply image. There was a spark and the fuse (1A , 250V) was blown. Since there is no spare fuse is available with me now, I tried to short the fuse terminals with a thin wire. But there is no power supply on the disply or on the mechanism.

Kindly provide your suggestions.


Thanks

NOUSHAD
noushadhaneefa2005@gmail.com

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Just get a similar power supply from another dvd player and convert it to the player

Posted on Aug 22, 2009

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Replace fuse with 1a 250v. See if any resistor ,or diode is bad replace

Posted on Apr 26, 2008

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Hello NOUSHADK,
I have good news and bad news for you. I'll give you the good news first. You know that new DVD player you have been wanting but never could buy because you already had a DVD player? 
Well, let's just say that you don't have that problem any more. When you dropped that screw on that resistor, you not only caused the fuse to blow, but you took out a few other components with it. This type of power supply is called a switching power supply because it takes AC voltage and then converts that AC voltage to DC voltage to power part of the circuits in the DVD player, then it takes some of the DC voltage produced and uses it to power an oscillator which provides a switching action for a Power MOSFET which is used to drive a switching transformer and then that voltage is converted into DC voltage for the other circuits not powered by the first power supply. Now this creates a problem, because when these types of power supplies blow out they take a lot of components (active and passive) with the blown out component.
Now for the bad news. These types of supplies are very seldom repairable, not because you can't find the parts and not because you cant find the layout, but usually because the parts are hard to find, in the case of the MOSFETs, the Switching Oscillator, and other active components.  Also, the schematics for these devices are not to be found anywhere even by locating the manufacture. This is because most of these units are put together in Taiwan or in Bangkok and then branded by a company, meaning the company whose name is on the unit is not the company who manufactured the unit. So schematics and service diagrams are usually not to be found.
I know this may not help you, but you can try to find the Power supply manufacture by using google, and getting them to send you a new board, or you can try to repair the board yourself, but remember you will have to hunt down at least 3 bad active components and a number of bad passive components.
Thank you,
Shuttle83 

Posted on Apr 23, 2008

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