[TechAssist] Re: Sony KV32FS10, IC650 main reg shorted,still shuts down

  • From: Gary McCartney <gary@xxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Tue, 12 Nov 2002 09:47:39 -0500

Perhaps the new part was labelled wrong and it is really a 5V regulator?
If the pinouts are the same as a 7812, why not try the 7812 just as a
test to verify that is the problem or not. The original part might be
rated higher in amps than a 7812, so it might be best to get another
original if needed for permanent install.



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Gary McCartney

McCartney Electronics
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Phil Bader wrote:
> 
> Was dead.Ordered the manual. The 12V three-terminal v. reg IC650 was
> dead shorted (BA12T on part) looked like an LM7812. Ordered and
> installed Sony original.The output pin on it is only 4.9 volts.(input is
> about 13.5 VDC)The tech lifted virtually all the 12v feeds "down stream"
> he could find and still 4.9VDC. IC650 has low output, but is cool,so
> not  pulling excess current. Baffeled as to why. The 9V reg IC641 has 9V
> out. The +135 V source is OK.
> It died in the "on" state, so tries to come on when plugged in. Get a
> burst of  high voltage,then shut down.
> Customer is, of course "less than understanding"...
> I am assisting another local shop.
> He called Fulton Radio for assist,but drew a blank. Please help if
> possible.
> Phil Bader
> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: philbad@xxxxxxxxxx
> 
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