Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Gerald Herzog
 
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Default Mitsubishi immediately shuts off

A 13 inch Mitsubishi TV shuts itself off just after being turned on. If the
high voltage unit for the kiny is heated first, then the set works fine.
Alternatively, if half line voltage is applied via a Variac (just enough to
get the electronic control to work and turn the set on) until the board
warms up, then the set will operate at full voltage and continue working
properly. There is no moisture present and the high voltage system works
fine once it is warm.
Anyone have a guess as to what is happening?

--
Jerry Herzog


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Jerry G.
 
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Default

It is very common that some of the caps in the powersupply, and the scan
circuits go high in ESR in these sets. Get an ESR meter and test all the
caps in the set. I am sure that you will find many of them need
replacing when doing such a test.

--

Jerry G.
======

"Gerald Herzog" wrote in message
ink.net...
A 13 inch Mitsubishi TV shuts itself off just after being turned on. If
the
high voltage unit for the kiny is heated first, then the set works
fine.
Alternatively, if half line voltage is applied via a Variac (just enough
to
get the electronic control to work and turn the set on) until the board
warms up, then the set will operate at full voltage and continue
working
properly. There is no moisture present and the high voltage system works
fine once it is warm.
Anyone have a guess as to what is happening?

--
Jerry Herzog



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