Author Topic: any samsung techs on here. (Read 7724 times)

mzone · « **on:** August 17, 2011,15:57:42 »

hi guys been working on 3 ps50c97hd samsung tvs.

all tvs had no picture due to blown top buffer and y-sus. i repaired all 3 ysus on all 3 tvs and tv now powers up by just trying lower buffers which were ok as only top had shorted.

however on all 3 tvs im getting a strange green dot type pattern?

this happens on all 3 tvs. on first thoughts im not convinced its still the ysus as all 3 are acting the same and all 3 tvs are using a different y-sus & bottom buffer. and were repaired by replacing the blown mosfets.

anyone have any ideas as its strange this is happening to all 3 tvs which the ysus was repaired.

i have checked vs.va. scan all all voltages correct.

http://www.youtube.com/watch?v=AKus6Dnror

heres a video below showing problem. has anyone come cross this problem.

thanks

Mulja tv repair portal · « **on:** August 17, 2011,15:57:42 »

brainstorm · « **Reply #1 on:** August 18, 2011,06:19:28 »

Hi

Im not a Samsung expert but i have just repaired a 50 inch Samsung with the same problem

One of the IC's on the upper buffer board had blown

I did a resistance check on the lower buffer board and it was reading leaky

So I replaced upper and lower buffer boards and fitted he Y sus kit and the set was ok

I wonder if you had a faulty lower buffer board as well, they don't have to be S/c to be faulty

Brian

mzone · « **Reply #2 on:** August 18, 2011,08:37:29 »

hi brainstorm.

its strange as i did not think it was still bottom buffers as all 3 tvs are useing different bottom buffers.

i did carry out a s/c check on the bottom buffer and it checks out ok.

i know how to test for s/c but dont know how you check to see if leaky.

could you give me some pointers on how you do a resistance check.

thanks

Mulja tv repair portal · « **Reply #2 on:** August 18, 2011,08:37:29 »

Ohm Supplies · « **Reply #3 on:** August 20, 2011,06:14:00 »

Brian,

We’re did you get that info. from?
It’s not meant to be posted on a public forum but passed from engineers to help with the repair

Andy

brainstorm · « **Reply #4 on:** August 20, 2011,07:07:51 »

Hi Andy

Sorry I didnt realise it wasn't for viewing, I have removed it from public view

Brian

Ohm Supplies · « **Reply #5 on:** August 20, 2011,07:11:10 »

Not a problem, can you tell me were you got it from?

best regards
ANdy

Mulja tv repair portal · « **Reply #5 on:** August 20, 2011,07:11:10 »

brainstorm · « **Reply #6 on:** August 20, 2011,07:25:22 »

Andy

I was sent it by a fellow engineer, I'm sorry I can't remember who it was

Brian

Ohm Supplies · « **Reply #7 on:** August 20, 2011,08:12:41 »

If i'd of known it would of been on here I'd of cleaned my nails

Do you have the y-sus sheet that goes with it?

regards
Andy

brainstorm · « **Reply #8 on:** August 20, 2011,09:17:06 »

Hi

No, I don't have the Ysus sheet, unless you mean the sheet that comes with the Ysus kit?

Brian

Ohm Supplies · « **Reply #9 on:** August 20, 2011,10:45:46 »

Brain,

Please can you check your NTLworld inbo,
regards
Andy

brainstorm · « **Reply #10 on:** August 21, 2011,04:02:52 »

Andy

Nothing arrived in my inbox

Brian

Ohm Supplies · « **Reply #11 on:** August 21, 2011,13:02:32 »

hello.

i've resent it, failing that can you email me and i'll forward it

Andy

mzone · « **Reply #12 on:** August 21, 2011,23:31:11 »

sorry my internets been off

thanks brainstorm.

popelm · « **Reply #13 on:** August 31, 2011,22:10:51 »

If i'd of known it would of been on here I'd of cleaned my nails

Do you have the y-sus sheet that goes with it?

regards
Andy

popelm · « **Reply #14 on:** August 31, 2011,22:12:37 »

sorry my internets been off thanks brainstorm.

Mulja tv repair portal · « **Reply #14 on:** August 31, 2011,22:12:37 »

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Author Topic: any samsung techs on here. (Read 7724 times)

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