Re: Re: Unusual WG6100 Deflection Board Problem

From: Mark Shostak <shostakmark_at_gmail.com>
Date: Thu Mar 24 2011 - 12:19:20 EDT

What's the filament resistance reading (measured directly across the pins on
the kine)?

Is there continuity between the neck board and the kine pins?

Did you try to rejuvenate the tube?

-Mark

On Thu, Mar 24, 2011 at 11:08 AM, Malcolm Mackenzie
<maxstang@sbcglobal.net>wrote:

> Ok...I've looked into this further and I'm even more perplexed. It appears
> the heater circuit isn't working. R107 on the deflection board never gets
> warm. I've got AC coming in to D108 and DC (-10V) coming out of D108 and
> the same voltage measured at the neck board where it enters the socket for
> the tube heater. Keep in mind that this neck board and tube work fine with
> another deflection board. Anyone good enough with schematics to tell me
> what to look for on the down stream end of the heater circuit?
>
> --- On *Sat, 3/19/11, Malcolm Mackenzie <maxstang@sbcglobal.net>* wrote:
>
>
> From: Malcolm Mackenzie <maxstang@sbcglobal.net>
> Subject: Unusual WG6100 Deflection Board Problem
> To: "Vector List" <vectorlist@vectorlist.org>
> Date: Saturday, March 19, 2011, 7:53 AM
>
> Hey guys. I've rebuilt a few 6100 deflection boards, including the one I'm
> currently having a problem with. I rebuilt the low voltage section and it
> worked fine, so I put it in my spares pile. Just pulled it out and I'm
> getting no video. I hear deflection chatter, I have the correct voltages on
> pins 1/8 and 5 of P900, but no video. It's almost like I'm getting no Z
> output. Anyone with greater knowledge than I have an idea? The rest of the
> monitor tests good with another deflection board.
>
>

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Received on Thu Mar 24 12:19:42 2011

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