Testing Flyback with 'scope

[Al]

Hi, Many years ago I was involved in TV repair and remember using a
method of 'Ring' testing a flyback using nothing more than a cap and a
scope. It was from a UK Practical Electronics article and it worked
very reliably to find shorted turns. I seem to remember it using the
horiz flyback pulse from the scope to inject a pulse and the rate of
decay was seen on the scope in the form or decaying oscillations, if
the txmr was shorted the decay was none linear and very short.
Anyone seen or using this method as I would like to get the set up and
use it again.
Al

 

[Sam Goldwasser]

Al <intel@mymts.net> writes:

Hi, Many years ago I was involved in TV repair and remember using a
method of 'Ring' testing a flyback using nothing more than a cap and a
scope. It was from a UK Practical Electronics article and it worked
very reliably to find shorted turns. I seem to remember it using the
horiz flyback pulse from the scope to inject a pulse and the rate of
decay was seen on the scope in the form or decaying oscillations, if
the txmr was shorted the decay was none linear and very short.
Anyone seen or using this method as I would like to get the set up and
use it again.

http://www.repairfaq.org/sam/flytest.htm#flym1

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
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[Al]

Thanks Sam, I May just put together the Dick Smith circuit.
Al
On 17 Apr 2004 12:55:55 -0400, Sam Goldwasser <sam@saul.cis.upenn.edu>
wrote:

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.