Re: WG6100 focus problem

----- Original Message -----
From: "Danny Pearson" <dannypearson@hotmail.com>
To: <vectorlist@synthcom.com>
Sent: Sunday, August 25, 2002 3:28 PM
Subject: VECTOR: WG6100 focus problem

> Hi all, apologies if you've read this already on RGVAC. Basically my
> Tempest's WG6100 has a real annoying problem - it's losing focus and
> brightness after about 10 minutes. To date I've re-capped it, reflowed ALL
> the solder on the HV and Neck boards, I've added tension to the neck board
> connectors, replaced ZD902, and swapped in known good MPSA06 transistors
> into Q901 and Q902 all with no change :( Can anyone explain what can
> cause a failure like this after 10 minutes or so? I'm assuming something
> is getting warm and ceasing to function correctly. Another observation I
> have made is that I can get the picture back for a short time if I fiddle
> with the brightness and focus pots - i.e if I turn them both up full and
> then readjust for normal viewing.

Sounds like the focus/ G-2 divider block is drifting with heat...TV flybacks do that all the time as
they
age...the only fix is to replace the block (or the whole supply in this case...)

AJH

> Danny.
>
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Received on Sun Aug 25 16:10:43 2002