VECTORLIST - The Mailing List For The Technical Discussion of Vector-Based Arcade Games

August_1999
Re: Tempest Problem


From: Kurt Mahan ( )
Date: Sun Aug 08 1999 - 19:17:21 CDT


> I was working on the high voltage PCB by putting in a Zannen cap kit. I
> followed the instructions REALLY carefully. When I put the monitor in - I
> first went to adjust the high voltage to a nice 19.5 KV at the anode on
> the crt - instead I'm getting 30Kv and I really can't adjust it too much.
> The other thing is - I plugged the board in to to see if any picture would
> at least show up. The game works, just no picture whatsoever.

"interesting"

Have you checked the low voltages going INTO the HV? I had a similar
problem and it turned out that one of the transistors that I installed
from Zanen (in the LV circuit) was bad. Hope its not a pattern..

Kurt


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