Tech: Wells Gardner problems

I have a wells monitor in my gravitar, but the pictur was very dark and
would change brightness. I replace the caps and some of the resistors and
transistors.
I still had the same problem. I turned the pots on the neck board and then
it went completely dark. I tried to set them back to where they were, but
still nothing. I took the monitor out and was running it and I noticed that
the HV trip light was on in the HV unit (this is late model HV unit). I
adjusted both the HV pot and the HV trip pot with no luck. I swapped the HV
unit with a working one and I could only get blue on the screen. I then
swapped neck boards and could only get blue and red (no green). I then went
to bed (1 AM).
So I have 2 problems,

1. The first HV unit thinks the HV is too high and is shutting it self down
(I can rewire this to by-pass it if I have to)

2. I can't get green (I've check to make sure the z signal is getting to
the socket), Is it possible for one color to be bad in the tube?

-jeff

jeffh@diac.com

Buy/Sell/Trade classic video arcade games.
www.diac.com/~jeffh/
Received on Tue Oct 21 08:42:41 1997