Matsui dvd 125 p.s.u.

[mike.f]

Who would want to fix a matsui!!! I would :-( !
It belongs to my daughter n she loves it!
The p.s.u. seems a simple enough pcb but a schema or anything could help!!
Everything on the 240v side of the board seems happy but nothing on the far
side
of the txformer.
Any help would be *greatly* appreciated! The no. on the board is 368 94V 0A
as far as i can tell--the eyes aren`t what they used to be!!

 

[mike.f]

Thanks for the reply. I could have been more explicit --apologies!
The beast is totally dead, and I suspect the psu. pcb. As I said the mains
side of the psu pcb shows no problems --lo-power choke, discrete diode
bridge,fuse and transient suppressor all seem happy. There is what `looks`
like a opto isolator crossing the line to the isolated end of the board and
a txformer.I am unable to give any voltages at the lo volt side, as I said
there is nothing to measure on the far side of the txformer. I do have
access to discrete electronic spares, and I suppose a replacement psu is the
easy answer, but I have very little practical experience in the brown goods
side of the market, being involved in industrial controls, plc`s etc. So
sourcing it could be problematic for me. My main enquiry was to source a
schema for this pcb if possible. The last time I attacked a T.V or the like
in anger would be some twenty years since!!! Once again thanks for the
courtesy of a reply and I certainly will access the FAQ for this NG.
(Incidentally I did find a site www.service-manuals.net but it seems to be
under construction.)
Regards. Mike.

"Sofie" <sofie@olypen.com> wrote in message
news:vhoec8p2p9r732@corp.supernews.com...

mike f:
It should be obvious here that we need a lot more to go on if you are
hoping
for anything that resembles a specific and helpful repair suggestion.
Please post all the technical results of your initial troubleshooting, DMM
voltage readings, component tests, and any pertinent visual observations.
Of course, you probably would have posted that information if you have the
needed electronics knowledge, repair experience, test equipment, tools,
proper replacement parts, etc........ without these things this repair is
not going to happen.
For more information you should go to the website for this newsgroup at
http://www.repairfaq.org/
There, with some searching, you will find a wealth of troubleshooting
tips,
repair procedures, component testing methods, and IMPORTANT safety
information.
If, after searching through the website, you still are not certain how to
proceed, it might be better for your VCR and safer for you to take it to a
repair shop for a proper and safe repair.... or at the very least you
should
have a repair shop do a "hands on" repair estimate with the necessary test
equipment so you can make an intelligent repair decision with facts
instead
of internet wild guesses.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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"mike.f" <m.c.frankland@ntlspamworld.com> wrote in message
news:yiTSa.6298$47.2110618@newsfep2-win.server.ntli.net...
Who would want to fix a matsui!!! I would :-( !
It belongs to my daughter n she loves it!
The p.s.u. seems a simple enough pcb but a schema or anything could
help!!
Everything on the 240v side of the board seems happy but nothing on the
far
side
of the txformer.
Any help would be *greatly* appreciated! The no. on the board is 368 94V
0A
as far as i can tell--the eyes aren`t what they used to be!!