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Strange colour problem , Ferguson FL15DX5 LCD tv

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ProDave:

--- Quote from: jurq on December 04, 2009,06:40:36 ---Hi,
I've just read this topic-> this is common problem in this TV. In this TV white balance settings for DTV are not the same as analog inputs, you can set it in service mode (all settings are in EEPROM). Do you have EEPROM/FLASH Programmer?

--- End quote ---
In service mode (when in DTV) there are settings for R bias, G bias and B bias, as well as R gain, G gain and B gain.

By default all bias settings were 0, and all gain settings around 100 give or take a bit.

By increasing G bias to about 100 i've got a vastly improved, but still not correct picture.  It looks fairly okay on the BBC test card, but "real pictures" reveal that dark scenes are still pretty poor.

Are there any other setting you are thinking of? that's all I have found so far.  I don't have an eeprom programmer.

I still get the feeling this set has a fault, and adjusting the settings like this is just patching it up.

This set is driving me nuts.  Another "quirk" is every time you exit from service mode, I find it's deleted all the stored analogue channels, and the user brightness, colour and contrast setting have gone back to some default with colour saturation way way too high. All adding to the time taken to test each adjustment.

Oh, and the PSU has started tripping again, but ONLY in analogue tv mode? perhaps it wasn't just some duff capacitors after all.

jurq:
I found out in one 17' Ferguson there were separate settings for analog and digital, that means new software was in some 17' models. What I did? The new software is in FLASH memory, the settings for RGB A/D converters in EEPROM then put new software from 17' FLASH memory to 15' (the picture was too big) and set white balance for DVB after that I put old 15' software to FLASH but new settings for A/D converters for DVB were wrtitten to EEPROM and the picture is perfect. Only what you need is hot air station, good programmer and dumps for FLASH (I got it :cheesy1:!) This is my patent and it work 100%.
Good Luck!

ProDave:
So you are saying the only way to properly fix this fault is to reprogram the eeprom by taking it out of the set.

Far too much work, even if I had the equipment.

So are you also saying the parameters that need changing are not available via the engineering menu's?

daz:
Hi prodave
Copying eeproms is pretty easy, there was a circuit for one in the old TV mag, which works great, if you’ve got a copy and costs pennies to make.
However from the model number this is only a 15 inch TV, may I suggest life is too short, add it to your pile of scrap TVs head off down the pub
 :brinda:
It’s been a bad week! (All hope is lost)
Daz

ProDave:
Very true.  As you say it's a c**p tv anyway so not worth spending any more time on.

I've got it as good as I can.  My wife says it's fine, but I can see it's still not right. I wouldn't be happy keeping and using this tv anyway even if the colour was perfect as it's very poor in many other respects.

Look out for it on sale on ebay some time soon.

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