Question about Panasonic PT-51HX42 51" Rear Projection Television

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Picture brightness too low

Unable to increase the picture brightness sufficiently using remote control. Can't seem to find any technical info on the Internet so I thought I?d try here before I crack the access panel to ?poke around?.

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  • tomj23 Nov 28, 2006

    Well since no one seems to be around I'll post what I found out after taking a look inside. No adjustments, plenty of capacitors to run afoul of and one thing of interest. Lots of dust has accumulated in the projection area over the past few years, especially on the projection lenses. I used a clean micro-fiber cloth to clean the dust and cobwebs off the mirror and the lenses. I did note some improvement in the brightness but not enough to make me happy.

    Guess I'm off to the repair shop.

  • tomj23 Feb 17, 2007

    Thanks forsaken2005, I found this site because of this issue and wound up posting. It was somewhat ironic that up till now never heard anything.

    Yes I did clean the mirror and that helped a little bit, the service manual and your tip will probably be the next thing after we recover from our recent snowstorm.

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Tom, Have you also attempted to clean the mirror as well as the inside of the screen? Focus as well as brightness issues can arise due to elements on these components as well. I would imagine you are having trouble with B+ V if this is not the case. Also if you have a HV probe you should get the service manual and check each flyback as well as the individual drives. Not familiar with Panasonic s method of return loop but if the voltages are wrong somewhere it will greatly effect performance of the circuit. Hope this helps. :) I smoke and have to clean mine regularly.

Posted on Feb 16, 2007

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A lot of people don't realize that backlight settings can affect the picture.

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