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jon R
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PostPosted: Wed Aug 05, 2009 4:35 pm    Post subject: Sony Plasma Reply with quote

Hi all, my first post here.

I have a faulty Sony Plasma TV and was wondering if it is safe to disconnect the sustain pcbs and then power it up so i can carry out V checks?

I have looked at another plasma before and unplugged the Xsus board, plugged it in and the psu melted. I wonder whether it was just coincidence!

I knw i havent posted any details re the tv (model etc), but thought I would see what i can gain from the checks first

Many thx
Jon
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PostPosted: Wed Aug 05, 2009 6:25 pm    Post subject: Reply with quote

How about following the procedures in the service manual for your specific model.
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Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Wed Aug 05, 2009 7:00 pm    Post subject: Reply with quote

This Parts & Service manual can now be purchased for $10.77 and downloaded immediately after payment from http://www.justmanuals.com


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jon R
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PostPosted: Wed Aug 05, 2009 9:05 pm    Post subject: Reply with quote

As far as i was aware there wasn't a REAL service manual for this Plasma!

Anyway, I exchanged the 4 bulging caps on this Plasma
(model = KE-42TS2/E)

4x 2200uf caps on the psu. I heard it was a common fault on these (as there are repair kits available consisting of these 4 caps ). No joy, but they needed changing anyway.

I suspect the Ysus board, but I am struggling with the main fan. I was told it was temp controlled but someone on another forum said it comes on straight away, mine doesn't (no V+). I did short out the fan return to gnd in case it was sensing a low speed.

Anyway, not sure if that is the problem.

anyone have any thought about the fan control?
Or anything else?

Many thx
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PostPosted: Thu Aug 06, 2009 4:41 am    Post subject: Reply with quote

You better use an isolation transformer when you test it under power or you may get a nice shock.
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anyhow



Joined: 28 Jul 2009
Posts: 21

PostPosted: Thu Aug 06, 2009 5:19 am    Post subject: Reply with quote

Here is the US version of the service manual KE-42TS2U:

http://www.eserviceinfo.com/downloadsm/43193/SONY_KE-42TS2U.html
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jon R
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PostPosted: Thu Aug 06, 2009 10:34 am    Post subject: Reply with quote

many thx anyhow for the link, checking it out now
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jon R
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PostPosted: Thu Aug 06, 2009 10:53 am    Post subject: Reply with quote

jon R wrote:
many thx anyhow for the link, checking it out now


what a strange service manual, nothing at all mentioned re the sustain boards OR psu (switching regulator).
I have seen a few manuals in my time (although not many plasma sm), but not one where all the main circuits are missing.

Back to square one i'm afraid.


thx anyway
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jon R
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PostPosted: Thu Aug 06, 2009 10:57 am    Post subject: Reply with quote

oops forgot to mention....... the fan isn't the problem, it has a delayed start
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minnie



Joined: 18 Aug 2005
Posts: 2877
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PostPosted: Fri Aug 07, 2009 2:50 am    Post subject: Reply with quote

Posting the model and what it's doing or not doing is a good start.
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