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From: jjke on 18 Apr 2010 01:47

> > On Dec 11, 2:09�am, JW <n...(a)dev.null> wrote:
> > Repairing a Wayne Kerr 3245 inductance analyzer that has a bad
CRT
> > board. C311 located between the yoke connector and the flyback
> > transformer is missing - judging from the capacitor
"fuzz" all over the
> > board it looks like it exploded.
> > ....
> > The deflection board is marked:
> > Computron 115DMX 36-138-01B. I do have a service manual, and it
covers
> > two different deflection boards, but of course neither one is
close to
> > the board in this unit. Emails to Wayne Kerr have been ignored
for the
> > most part.
> >
> whit3rd wrote:
>
>
> So, can you reverse-engineer using the manuals? If the capacitor
> is part of the vertical-deflection circuitry, and the ICs that
drive
> that vertical deflection match one of your service-manual
examples,
> the component value should be easy to find. You may need to
> trace wires, of course.
>
> In my experience, the big capacitor near the yoke connector
> is for vertical deflection...

From: JW on 20 Apr 2010 05:11
On Sun, 18 Apr 2010 00:47:03 -0500
electronicaycontrol(a)gmail-dot-com.no-spam.invalid (jjke) wrote in Message
id: <huydnZNKPZtKAVfWnZ2dnUVZ_jUAAAAA(a)giganews.com>:

>
> > GUEST wrote:
> > Repairing a Wayne Kerr 3245 inductance analyzer that has a bad CRT
> > board. C311 located between the yoke connector and the flyback
> > transformer is missing - judging from the capacitor
>"fuzz" all over the
> > board it looks like it exploded. There are no remains inside the
>unit so
> > I can't identify what the cap's value and voltage was, but it was a
>
> > largish one about 3/4" in diameter that's in series with a
>heavy
> > inductor and the yoke itself. The deflection board is marked:
> > Computron 115DMX 36-138-01B. I do have a service manual, and it
>covers
> > two different deflection boards, but of course neither one is close
>to
> > the board in this unit. Emails to Wayne Kerr have been ignored for
>the
> > most part.
> >
> > I suppose someone has removed the part's remains, but never
>repaired the
> > analyzer. Does anyone have any service data on this board or have
>one that
> > they could take a look at to get the caps value? I believe that
>this
> > monitor assembly was used in many other devices as well.
> >
> > Thanks for any help.
>
>Hi, JW. I just posted a response to
>your inquiry, but it appears that I posted it incorrecly. The correct
>post follows below:
>
>
>
>"Hi, JW. I recently acquired a 3245 inductance analyzer. The
>capacitor you are referring is a 47 uF/50V electrolytic. It appears
>to be non-polaryzed, as I can not see any polarity mark.
>
>In my 3245, this capacitor gets warm after several minutes of
>operation. So I think I will replace the capacitor for a new one, to
>prevent it to cause any damage in the future.
>
>I hope this information is useful to you. Also, if you have the
>operation and or service manuals for the analyzer I would like to
>have a copy, if you can email or copy (I would pay the duplication
>cost, if any). "

Hi jjke,

Unfortunately, I no longer work for the company where I was working on the
unit. They still have the hard copy manual, so I'm afraid I can't help
you. Thanks for the reply, though.

We did purchase the manual direct from Wayne Kerr, I'm sure they'll sell
you one if you need it.
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