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Equipment Repairs => PLASMA TV forum => Topic started by: mzone on August 17, 2011,15:57:42

Title: any samsung techs on here.
Post by: 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

Title: Re: any samsung techs on here.
Post by: brainstorm 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

Title: Re: any samsung techs on here.
Post by: mzone 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

Title: Re: any samsung techs on here.
Post by: Ohm Supplies 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

Title: Re: any samsung techs on here.
Post by: brainstorm 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

Title: Re: any samsung techs on here.
Post by: Ohm Supplies on August 20, 2011,07:11:10

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

best regards
ANdy

Title: Re: any samsung techs on here.
Post by: brainstorm 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

Title: Re: any samsung techs on here.
Post by: Ohm Supplies on August 20, 2011,08:12:41

If i'd of known it would of been on here I'd of cleaned my nails  :party0036:

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

regards
Andy

Title: Re: any samsung techs on here.
Post by: brainstorm 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

Title: Re: any samsung techs on here.
Post by: Ohm Supplies on August 20, 2011,10:45:46

Brain,

Please can you check your NTLworld inbo,
regards
Andy

Title: Re: any samsung techs on here.
Post by: brainstorm on August 21, 2011,04:02:52

Andy

Nothing arrived in my inbox


Brian

Title: Re: any samsung techs on here.
Post by: Ohm Supplies on August 21, 2011,13:02:32

hello.

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

Andy

Title: Re: any samsung techs on here.
Post by: mzone on August 21, 2011,23:31:11

sorry my internets been off  :33:

thanks brainstorm.

 :c017:

Title: Re: any samsung techs on here.
Post by: popelm 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 :33:

Title: Re: any samsung techs on here.
Post by: popelm on August 31, 2011,22:12:37

sorry my internets been off  thanks brainstorm.

 :33: :33: