Wayne Kerr 3245 inductance analyzer with bad deflection board

[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.

 

[bysteve]

missing cap

Hi,
I also have a 3245 which has no disply, but for different reasons. Your Cap (if it is the one between the scan coil connector marked "H300" and the Line Output Transformer) is an Electrolytic, 47uF/50V.

NOTE: I can't see ANY polarity marks on it. I think it is Non-Polarised (it has "NP" markings), which would possibly be expected if this is in series with the horizontal coils as it would be the "S" correction capacitor?

PS this is straining my memory as I haven't worked on telly circuits since 1979

Hope this helps.

Steve