Wayne Kerr 3245 inductance analyzer with bad deflection boar

[JW]

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.

 

[whit3rd]

On Dec 11, 2:09 am, JW <n...@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.

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...

 

[jjke]

On Dec 11, 2:09 am, JW <n...@dev.null> wrote
Repairing a Wayne Kerr 3245 inductance analyzer that has a ba
CR
board. C311 located between the yoke connector and the flybac
transformer is missing - judging from the capacito
"fuzz" all over th
board it looks like it exploded
...
The deflection board is marked
Computron 115DMX 36-138-01B. I do have a service manual, and i
cover
two different deflection boards, but of course neither one i
close t
the board in this unit. Emails to Wayne Kerr have been ignore
for th
most part

whit3rd wrote


So, can you reverse-engineer using the manuals? If the capacito
is part of the vertical-deflection circuitry, and the ICs tha
driv
that vertical deflection match one of your service-manua
examples
the component value should be easy to find. You may need t
trace wires, of course

In my experience, the big capacitor near the yoke connecto
is for vertical deflection..

 

[jjke]

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 capacito
"fuzz" all over the
board it looks like it exploded. There are no remains inside th
unit so
I can't identify what the cap's value and voltage was, but it was

largish one about 3/4" in diameter that's in series with
heavy
inductor and the yoke itself. The deflection board is marked
Computron 115DMX 36-138-01B. I do have a service manual, and i
covers
two different deflection boards, but of course neither one is clos
to
the board in this unit. Emails to Wayne Kerr have been ignored fo
th
most part

I suppose someone has removed the part's remains, but neve
repaired the
analyzer. Does anyone have any service data on this board or hav
one tha
they could take a look at to get the caps value? I believe tha
thi
monitor assembly was used in many other devices as well

Thanks for any help

Hi, JW. I just posted a response t
your inquiry, but it appears that I posted it incorrecly. The correc
post follows below


"Hi, JW. I recently acquired a 3245 inductance analyzer. Th
capacitor you are referring is a 47 uF/50V electrolytic. It appear
to be non-polaryzed, as I can not see any polarity mark.

In my 3245, this capacitor gets warm after several minutes o
operation. So I think I will replace the capacitor for a new one, t
prevent it to cause any damage in the future.

I hope this information is useful to you. Also, if you have th
operation and or service manuals for the analyzer I would like t
have a copy, if you can email or copy (I would pay the duplicatio
cost, if any).

 

[JW]

On Sun, 18 Apr 2010 00:47:03 -0500
electronicaycontrol@gmail-dot-com.no-spam.invalid (jjke) wrote in Message
id: <huydnZNKPZtKAVfWnZ2dnUVZ_jUAAAAA@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.