Re: Good source for 2S* transistors

Werner,

What makes you think it's a 2SXXX? Did you ever use this monitor in this
game? If not, the game may use a different sync hookup (+, - or
composite). If it worked on this game before and you're sure it's wired
correctly, and you're having trouble locking the sync you can adjust the
choke on the XY pcb. It should act like a course sync adjustment. The
+144 is too high. You should adjust the b+ closer to +130V. Let us know
how you make out.

-t-

--- Werner Sharp <sharpw@bellsouth.net> wrote:
> Hi everyone,
>
> I'm working on the WG4600 monitor and need to order a bunch of 2S*
> transistors. Is there a particularly good source for these? I'm
> hoping
> to avoid the NTE equivalents at $4 a chip and instead get them at
> something
> more reasonable.
>
> The monitor I'm working had only 1/3 of the screen visible when I
> started. I replaced both vertical deflection transistors on the XY
> board
> and I now have a full screen image. It rolls vertically though and has
> a
> slightly horizontal wave to it. It's not the sync signal or the
> vertical
> hold pot but something else going on. The 127v voltage is up at 144v or
> so
> but I don't know if that is a big problem. It has a new cap kit in it
> so
> all the caps should be go. I'm been through the troubleshooting
> flowchart
> and started going through the transistors one by one. If anyone has
> any
> good suggestions, I'd love to hear them. I think the problem is on the
> XY
> card but I'm not sure. I have four of them and this one worked the
> best
> of the bunch. I've also swapped in 4 different video interface cards
> with
> no effect.
>
> Thanks for any info.
>
> Werner Sharp
> sharpw@bellsouth.net
>
>
>
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Received on Thu Sep 27 08:35:34 2001