Re: Testing a G-08 color vector monitor

Hi Mark!

Sounds like either a bad picture tube OR you forgot/overlooked to
connect the black(usually back, might be green) ground lead from the
strap running along the side of the picture tube to the small "G (or
GND)" tab on the neck board.

The neons should NOT light up!!!! This is NOT good. Turn it OFF! Find
the bad ground connection before turning on again...

or it's the tube. Sigh.

John :-#)#

Mark Jenison wrote:
>
> Hi all,
>
> I pieced together a G-08 from parts from an operator. All deflection
> transistors are good, and the fuses are replaced. I fired up the game and the
> neon bulbs on the neck board came on. Inside the tube itself, I can see a
> little electric arcing going on. I thought maybe the HV unit was bad, so I
> replaced it with another, and got the same results.
>
> Is it possible to test the boards without the tube hooked up? I'm afraid this
> internal electrical arcing might hurt the tube (if the tube isn't bad,
> already), but I thought maybe the tube somehow completes the circuit, so it
> would need to be there to do any real testing.
>
> Also, I haven't bothered looking at the schematics yet, but if anyone has any
> ideas off the top of their head as to what areas to look into, let me know.
> Thanks!
>
> ----------------------------------------------------------------------
> Mark Jenison E-mail address: jenison@cig.mot.com
> Cellular Infrastructure Group Motorola--Arlington Heights, IL
> ----------------------------------------------------------------------

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