[TechAssist] Re: SECOND REQUEST SYLVANIA 6427CTA

  • From: ALVIN ROSE <ajroseca@xxxxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 14 Jul 2005 16:02:39 -0230

Hi Jerry
I received a pdf of the circuits from several  of our techs
on this list..will be checking the suggestions ASAP
The help of all techs is much appreciated
This group goes above and beyond with technical help
Thanks guys
Alvin R
Jerome Silverman wrote:

>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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