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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  • jafar21 Nov 11, 2007

    Brand new unit out of box. Only finds 13 channels on tuner, and picture barely has color and very dark.

  • Anonymous Dec 12, 2007

    Screen is very dark, can only see shadows. Tried to brighten the color, as well as use with the AC charger but still dark.

  • roger12345 Jan 05, 2008

    I played with the parental control in the remote control, and now i dont see any video, bu the audio plays

    mahdi

  • chandybing Feb 11, 2008

    The screen is to dark to see picture - sound works, but there is no picture. This happened once before and we adjusted the brightness, however, this time we can barely see the bar at the bottom to fix it. Not sure if there is another method we could do to fix it.

  • Anonymous Feb 22, 2008

    I only have sound

  • woodie wood Mar 21, 2008

    SCREEN IS TO DARK, CAN ONLY SEE SHASOWS. SOMEONE MENTIONED CHANGING JUNGLE CHIP. HOW DO YOU DO THAT?

  • territo Apr 01, 2008

    we were watching a movie and the screen went dark. Audio is fine. The unit has not been played a lot!

  • Anonymous May 22, 2008

    brightset high

  • 24348 May 29, 2008

    only blurred picture is seen themode and up down controls are ineffective.seems product is useless

  • Anonymous Aug 18, 2008

    the screen is dark and i can barely see the images on it. does anyone know how to fix this?

  • Anonymous Aug 27, 2008

    the screen lights up for a couple of seconds, then goes out, just barely see a shadow. i tore it apart and found a small circuit board next to the screen. when i play around with the coil, it smokes and i can make it light up, longer or less depending on what i touch. can i get the circuit board and how much? enr@xcountry.tv

  • blueocean016 Feb 24, 2009

    My computer backlight is dark...I dont know what to do with it..I dont have any idea when its about computers...Is there any way i could possibly control the backlight system?? I already maximize its brightness pressing Fn + arrow up thing..No change~~Please help...

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Answer
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:
http://www.schematicsforfree.com/archive/dir/Sony/Video
and scan down you will find a service manual download for a model Sony KV32FV15.zip. 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:
http://www.iwaynet.net/~nesda/SonyBlink.html

Hope this helps get you started.

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

http://www.repairfaq.org/sam/tvfaq.htm

Posted on Apr 03, 2008

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  • 3,130 Answers

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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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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