Question about Protron PDV-228 Portable DVD Player

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Dark screen the screen is to dark to see the picture only shodows

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Re: dark screen

The jungle chip is the main IC processor. It is very complicated and has hundreds of circuits surrounding its complexity. The jungle chip has over 1 million transistors inside and it performs dozens of important functions.

The testing of the horizontal sweep function requires technical knowledge of how the circuits work and interact with each other. There are over 100 components that will need to be tested or looked at. A voltmeter and oscilloscope are necessary to signal trace the horizontal signals from the pedestal strip from the IF to the jungle chip and out to the horizontal sweep and synchronization circuits.

If you go to:
and scan down you will find a service manual download for a model Sony It is a huge file and will take long time to download, but it contains schematics, parts list and so on. This model is similar to your model and close enough for general troubleshooting. If you have technical skills in circuitry and schematic interpretation it may be useful for you. At least you can get the part numbers for the jungle chip and the horizontal sweep area.

Also, if you go to this web page, it will give you a little more information on the 6 blink diagnostics - again, they are for another model set, but close enough for general guidance on all Sony models:

Hope this helps get you started.

PS: For general guidance and tutorial lecture, go to:

Posted on Apr 03, 2008

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Re: dark screen

The backlight circuit is defective most likly. Its not a consmer repairable thing as there are no user serviceable parts inside these units . Call the manufactuer thats listed in your instruction or owbers manual as they may have an exchange or repir program for these units. Good Luck

Posted on Aug 07, 2006

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Re: dark screen

How old is your equipment? however the problem lies in the video amplifier,luminance has failed. you may replace the jungle chip(i.c.)

Posted on Aug 07, 2006

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