[TechAssist] Re: SECOND REQUEST SYLVANIA 6427CTA
- From: "Jerome Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 13 Jul 2005 20:54:12 -0400
You need a circuit diagram. At the micro there may be several power safety
inputs and an x-ray input. Monitor those inputs with a scope as you press
the power button. The one that does not agree with the voltages on the print
will point you to the circuit or group of circuits where the problem is.
This is the method I use with all of the Funai product where the power can
be turned on and shuts off after a short time. Usually this points to the
deflection circuits. The deflection circuit may have 3 or 4 deflection
related functions combined into one power safety.
Jerry Silverman
Greentron Inc
4 Newland Ave Greenville SC 29609
Fax/Phone 864 232 3889
greentron@xxxxxxx
----- Original Message -----
From: "ALVIN ROSE" <ajroseca@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, July 13, 2005 6:55 PM
Subject: [TechAssist] SECOND REQUEST SYLVANIA 6427CTA
> Hi Guys
> We have a Sylvania Model 6427CTA color Tv
> (Canadian Model) which shuts down within a second
> of two..Checked horr output and diodes in supply..checks ok
> There is no large current draw before it shuts down...
> Zener D396 looks like it has over heated the board
> also R322 and R397 have over heated..C396 had
> low esr which was replaced..Would appreciate any help or suggestions
> on this one..Anyone have a PDF of the circuit
> Alvin Rose
> Radio & Tv Centre
> Marystown, NL.
>
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