[TechAssist] Re: Symphonic TVCR9F1 blows regulator

  • From: Gary McCartney <gary@xxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Thu, 18 Sep 2003 13:07:52 -0400

Check that you didn't use a 78M06. They are only rated 1/2 amp, whereas
the 7806 is rated 1 amp.




Gary McCartney

McCartney Electronics
Guelph Ontario Canada 
Est. 1984
email: gary (at) number63.ca





J Silverman wrote:
> 
> This 1996 combo damages the AN7806 regulator after about 30 minutes of
> operation. Classic symptom is blank screen and a buzzing noise. Replace
> IC651 and its good for about another half hour. I thought the only thing
> that can damage that regulator is excessive input voltage because it has
> built in current limiting and thermal shutdown. Changed C653, 220/10, JIC
> IC651 was going into oscillation. No difference.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
> 
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