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Equipment Repairs => LCD TV forum => Topic started by: Turnip on February 11, 2011,09:10:22

Title: Sharp LC46XD1E
Post by: Turnip on February 11, 2011,09:10:22

Hi folks,

Have one of these where the picture seems to comprise of a left hand bit and a right hand bit. Set starts off with a slight flicker affecting either side but separately.

Eventually LH side loses picture content with just blue horizontal flashing bands, RH side keeps the picture but has horiz bands and thin white vertical flashes.

From the rear, the backlights seem quite steady - any thoughts ?  - Chris.

Title: Re: Sharp LC46XD1E
Post by: sparky on February 11, 2011,09:20:42

hi
tcon or screen whats it like thro to another tv
dave

Title: Re: Sharp LC46XD1E
Post by: Turnip on February 11, 2011,12:01:27

Hi Sparky,

Tried Scart out and that was OK. Tried various inputs and found that on certain FTV channels and certain adverts the screen was perfectly normal, but when picture content changed the problem returned.

Another interesting thing is that with DVD input (those first pics) the interference was horizontal but with FTV input it became vertical (as per third pic)

Am getting a main-board feeling about this one - really bright screen - no probs, darkish screen - it goes wild - Chris.

PS - Then when set got really hot - 4th piccy

Title: Re: Sharp LC46XD1E
Post by: davenjax on February 11, 2011,14:04:51

hi chris id be tryin the tcon first myself might be cheaper than sourcing a main board .dave

Title: Re: Sharp LC46XD1E
Post by: astracat on February 11, 2011,15:01:52

hi
had a diff model with similar prob turned out to be a crystal on main board a sod to get to as it was under a metal cover.may be worth a check on all crystals
g/luck
astracat

Title: Re: Sharp LC46XD1E
Post by: Turnip on February 12, 2011,05:05:35

Hi folks,

Thanks a lot for that. You will have noticed the fault seems very heat sensitive in a progressive manner so will attack it with freezer, failing that wait for a screen smash - shouldn't take long.

Thanks again - Chris.

PS - Noticed that LVDS runs really hot and seems to have two large chips, one for each side of the screen perhaps. Expended lots of freezer about the set, only difference was on LVDS panel where fault became slightly less. Eventually on test, the screen went dark and LVDS ran cool - guess an on-board fuse gone - ah well, feel if I get a new one, will fit a fan in the LVDS housing as the rest of the set runs quite cool.
Could be of course, that the fault caused excessive LVDS temperatures - will see.

Title: Re: Sharp LC46XD1E
Post by: Turnip on February 22, 2011,12:59:28

Hi folks,

As an update got £32 LVDS from Ebay - fitted it - same split screen - merde. Will go check those crystals, with a hammer.

Ever relaxed - Chris.