Re: Asteroids GO5 help

Ron,

Trust me, you do need to do the resistor thing (10 x 100K Ohm in series if I
remember correctly). Take it from a guy who blew two HV diodes at about $15
a pop doing it the wrong way.

It's really funny about that too... I only had raster games in the past and
it was always just take the grounded screwdriver and discharge. I never
heard not to do that on RGVAC or in any documents until I got my first
vector game and got on the vector list. My guess is that since I didn't have
any vectors at the time, I never thought they were different and didn't look
at much vector info.

Anyway, if you will be working on vectors at all, I would suggest you get a
HV probe. It's good for discharging and almost essential for diagnosing HV
problems. They are fairly cheap on Ebay.

Good luck,
-Commander "sparky" Dave

----- Original Message -----
From: "Ron" <MrArcade@woh.rr.com>
To: <vectorlist@beacon.synthcom.com>
Sent: Wednesday, October 02, 2002 14:09 PM
Subject: VECTOR: Asteroids GO5 help

>
>
>
> This is my first attempt at vector repair. Before I owned the machine it
> lost video. The owner took it to a retired tv repair guy. He replaced 2
> transistors, 1 rectifier and 1 fuse. This was written on a piece of
paper.
> Unfortunately he did not note the locations of the parts. I am assuming
he
> replaced f102 because that is what still blows.
>
> When I got it, f102 was blown, spot killer is off, of course there is no
40v
> going to the EHT.
>
> I have the schematics, and have watched the Randy Fromm xy repair video.
>
> Here is what I have done. After blowing f102 again, I removed it,
unplugged
> P500 from the deflection board, and powered up. I checked for dc across
> pins 6 and 7 and got 40.3v. F102 does not blow with P500 unplugged. Does
> this mean the problem is in the EHT cage?
>
> I am not an electronics wiz....and I know that sometimes circuits don't
> react the same when there is no load etc.
>
> I am also unsure of discharging the tube. I have read that you need to
use
> resistors to insure you won't damage something in the EHT cage. Is this
> correct?
>
> Thanks for any and all advice,
>
> Ron
>
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Received on Wed Oct 2 15:34:54 2002