Author Topic: Sharp LC37X20E pic fault (Read 6188 times)

digitech1962 · « **on:** February 18, 2011,13:44:09 »

This TV has lines on the picture, looks like watermarks, 7 lines in total (pic attached)

Mulja tv repair portal · « **on:** February 18, 2011,13:44:09 »

Kilroys · « **Reply #1 on:** February 19, 2011,08:15:13 »

It looks like lamp tube damage.
Here is a few point to check.
See if the serial number is in the following range

xxx411112 ~ xxx416646
xxx511112 ~ xxx517834
xxx611112 ~ xxx632500
xxx811112 ~ xxx811112
709011112 ~ 711016906

if yes then
check if any of the lamps have any crack
or any discoloration in yellow.
If so, replace the defect lamp.

check if any of the lamp sockets have any damaged marks.
If so, replace the defect lamp socket.

Turnip · « **Reply #2 on:** February 20, 2011,11:48:20 »

Hi,

Note from piccy that problem seems LHS of screen only - Backlight tubes usually extend right across the screen but LVDS on large screen sets often have a drive chip for either side.

Just a thought as I have one with a similar (but different) prob - Chris

Mulja tv repair portal · « **Reply #2 on:** February 20, 2011,11:48:20 »

sparky · « **Reply #3 on:** February 20, 2011,13:52:53 »

hi
chris if you split the screen you can see were the tubes do
show signs of discolouring from the ends to middle
dave

Turnip · « **Reply #4 on:** February 21, 2011,11:50:27 »

Hi Sparky,

Well could be, but haven't yet met a CCFL tube that's OK to half way point then becomes duff the rest of the way.

Roll on cool diodes, where individual ones will pop out and give curious thumb-prints. Can't wait - Chris.

digitech1962 · « **Reply #5 on:** February 21, 2011,15:57:22 »

The lines on screen are wavey and not all the way across screen' also some run vertical from top but only 1cm long. may order tecon to check?

Mulja tv repair portal · « **Reply #5 on:** February 21, 2011,15:57:22 »

Turnip · « **Reply #6 on:** February 22, 2011,13:14:20 »

Hi DT,

Now you tell us probs can be vertical. Never met vertical tubes - gives us more piccies if you fancy it.

Tcons can be an expensive hobby - just don't ask - Chris.

watteau · « **Reply #7 on:** August 12, 2011,08:13:12 »

Hi,
Just come across this post, but replying now for future reference.

This is a common problem on this model.
The diffuser behind the LCD panel has a plastic membrane on it,
and this bubbles/separates from the main plastic panel.
There is a mod. kit to replace the diffuser screens (3) at about £100
Regards,
John

digitech1962 · « **Reply #8 on:** August 17, 2011,07:44:11 »

Thanks who stocks them many thanks dave.

watteau · « **Reply #9 on:** August 18, 2011,05:52:14 »

Hi,
As far as I know, they're only available from Sharp themselves.
Not sure if they can be reclaimed from a faulty, display of the
same size etc.
Attached is some more info. on the repair procedure.
Regards,
John.

Mulja tv repair portal · « **Reply #9 on:** August 18, 2011,05:52:14 »

Mulja tv repair portal

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