50" Samsung Plasma (model number PS50Q91HD) - possible purchase
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
Well I tried a 72W halogen globe as well and same result.
Decided to bite the bullet and try it without the globe in series.
Plugged in the AC, 1 click and silence.
Tried turning the TV on and got some buzzing from the back of the set, then something went 'pop' with a small amount of smoke on the Y-main board.
Not sure what the part is in the attached photo (Q5501) - but it doesn't look so good anymore :PLast edited by psmedley; 07-14-2012, 12:18 AM.Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
Interestingly, when replacing the bulged 680uf 25v capacitor on the Ysus board, I did notice some dark/brown patches underneath Q5501 which is now blown - so this mosfet has obviously been running hot.
From what I've read, I should be able to replace this mosfet, however will need to most likely replace both Y buffer boards?Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
Interestingly, when replacing the bulged 680uf 25v capacitor on the Ysus board, I did notice some dark/brown patches underneath Q5501 which is now blown - so this mosfet has obviously been running hot.
From what I've read, I should be able to replace this mosfet, however will need to most likely replace both Y buffer boards?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
I must say, this set is really testing by confidence - I was quick cocky after fixing the 32" plasma :P
I also need to try and work out if Q5501 is the only messed up part on the Ysus or if I should bite the bullet and just order something like http://www.ebay.com.au/itm/271002634287Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
I'd throw out the Jackcon caps though! Looks okay.
Testing for shorts isn't too difficult:
http://blog.coppelltvrepair.com/2010...er-boards.htmlPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
hmmm doesn't look too promising for the buffers...
Depending which pins I test on the upper board I'm getting either 0, or 5k ohms or 10k ohms.
lower board on some pins I get open loop, others 0.
If I need to replace buffers + repair ysus it's starting to get a little expensive and perhaps not worthwhileComment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
hmmm doesn't look too promising for the buffers...
Depending which pins I test on the upper board I'm getting either 0, or 5k ohms or 10k ohms.
lower board on some pins I get open loop, others 0.
If I need to replace buffers + repair ysus it's starting to get a little expensive and perhaps not worthwhilePlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
A good place to check would be across that red cap.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
Will do... so basically top half of connector to bottom half...
Which is not what http://www.coppelltvrepair.com/data/...2-01203A-1.jpg showsComment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
btw I'd already replaced the 680uf 25v caps with Rubycon ZL's as two of the three were already bulged, so the jackson's WILL be going straight into the binComment
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Re: 50" Samsung Plasma (model number PS50Q91HD) - possible purchase
upper buffer board - top pins to bottom 3 pins = 5 ohms. Once I go to fourth pin from bottom, pins have high resistance (min 10k, some M or OL)Comment
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