Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

[WhereInsSussex]

Hi

I have been given the above model of TV and upon testing there is a fault where the colour is "wrong" (looks too orange/red - like an old TV when you turned the colour control up) and when there is a caption, something like a news set where the background is static or the menu is selected the image of that is temporarily ghosted on the screen and fades over a few minutes.

Any ideas if this is a simple fix where a component is dying/died or is it a skip job?

[tom66]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Probably fixable - sounds like a "gamma chip" fault. Do you have a camera to take a picture of the set's boards?

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Yes I do, what in particular should I be photographing, or just all of it?

[tom66]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

A picture of the T-con board. If you're unsure on which board this is, take a photo of the whole set.

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Here you go.... believe this is the offending board

[tom66]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Is it possible to get a shot under the wall bracket or to remove that bracket.

[budm]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Another bad AS15.
Good picture here from SJ:
http://www.shopjimmy.com/media/catal...03.021-top.jpg
SJ is also selling kit:
http://www.shopjimmy.com/catalogsear...?q=T370XW02+V5

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Yes, that's the board.... 5537T03021 in the bar code label

[tom66]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Top left hand corner of board you'll see a bunch of test points marked VGAMA1 through VGAMA22.
Test the voltage on each of these points with a digital multimeter.
Use 20V range, red probe on each point, black probe on chassis.
Report your readings for each VGAMA point.

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

1 - 15.37
2 - 15.23
3 - 13.48
4 - 12.27
5 - 11.92
6 - 10.80
7 - 10.45
8 - 10.15
9 - 9.89
10 - 7.52
11 - 7.33
12 - 6.86
13 - 6.94
14 - 8.07
15 - 8.22
16 - 8.41
17 - 8.92
18 - 8.62
19 - 9.63
20 - 9.20
21 - 10.96
22 - 10.97

[budm]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

It is bad.

[audiofreak19]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

I am so glad we have been discussing and finding these faults in the gamma chips. Ever since we had the big blow up in tv's having bad gamma chips I have picked up 3 tv's with bad ones within a two week span off craigslist which is rare.

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

It is bad.

Lol thanks for that! So I either have to replace the chip or (easy option) the board yeah?

[tom66]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Lol thanks for that! So I either have to replace the chip or (easy option) the board yeah?

Yep. Some sellers offer a repair service too.

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Yep. Some sellers offer a repair service too.

Excellent, thanks for all the help!

[WhereInsSussex]

Re: Samsung LE37R87BD Poor Colour and Very Short Term Image Retention

Well, I found a card online and in stock (on third attempt) from a small company in the USA and they posted it to me 11 days ago for £34 in total.... arrived this morning, put it in and bingo!

Thanks for your help everyone... another TV saved from the skip!