Re: A bad day in My arcade (V2000 help)

It is the no spot killer that is bothering me.. And the low High
Voltage. I DO have heater glow and the voltage to the heater was checked
as well(and is fine). I have not tried an Y and Z OR X and Z combination
though. Ill give that I try in about 2 house when I get home.

-=Mark=-

Andy Welburn wrote:

>>Hooking up Z to the scope changes nothing.... I still see all the
>>retrace line like if I didn't hook it up
>>
>
> well then.. if you have X tied to x on your scope, likewise with Y and Z and
> your scope still shows the retrace lines then you have no Z..
>
> the very quickest/simplest way of doign this is to just trace the Z on one
> of the normal channels, set at about 1ms/div if you don't get a trace, then
> you don't got a Z there :) (NOT just hooking Z to the Z on your scope, thast
> just confuses things.)
>
> however, that wouldn't explain why your spot killer is not lit.. if your
> spot killer is not lit, then you need to look and see if you have the tube
> heater going, then you need to rip apart the Z section on the deflection
> pcb..
>
> Andy
>
>>No Blooming on the monitor before or after and I do have a HV probe..
>>That's how I know Im getting 12kv. But as I understand it.. The normal
>>reading should be 14.5kv and im not running that high. I guess I was
>>asking if I should be able to see something on the screen (distorted or
>>not) if I was running as low as 12kv, and if the answer was NO.. No
>>picture at 12 kv, I should replace the diode (which Id rather not do
>>unless absolutely necessary)
>>
>>Christopher X. Candreva wrote:
>>
>>
>>>On Mon, 15 Jul 2002, Mark E Davidson wrote:
>>>
>>>
>>>
>>>>Like I said before.. There is a picture there. (on the scope) so I know
>>>>the board is putting out
>>>>
>>>>
>>>'Picture' is not quite a technical term. What you have is x/y
>>>
> deflection
>
>>>that matches expected output. You've verified that you have X/Y
>>>
> deflection
>
>>>comming from the board -- that's it. There's a third componant needed
>>>
> to
>
>>>make a complete picture: Intensity, which provides both relative
>>>
> shadeing of
>
>>>images and blanking of non-image related movements.
>>>
>>>(Now, how's THAT for a load of techno-bable :-) Seriously -- defineing
>>>
> your
>
>>>problem is half the battle.[1]
>>>
>>>
>>>
>>>>Would the loss of Z on the game board leave no monitor picture?
>>>>
>>>>
>>>Sure. Z is intensity. If Z=0, then the picture will always be at
>>>
> intensity 0
>
>>>-- blank. Since turning up the brightness shows a picutres, that means
>>>deflection is getting there. (OK -- I'm assumeing here that 0 is blank
>>>
> and
>
>>>+volage is on. It could be inverse logic, etc, but it should be a
>>>
> waveform,
>
>>>not a steady 0 or +5 or anything)
>>>
>>>So, hook up the Z -- if the scope blanks too, there's your problem. If
>>>
> just
>
>>>the retrace lines go away, then it might be Z in the monitor.
>>>
>>>
>>>
>>>>Is there a way to test the HV diode? (most likely not.. but I have to
>>>>
> ask)
>
>>>Other than using an HV probe -- I would say you did by turning up the
>>>brightness -- was the picture bloomed ?
>>>
>>>-Chris
>>>
>>>
>>>[1] I've got an older house with plaster walls, and needed to rewire an
>>>outlet, preferabley without knocking holes in plaster. Problem was the
>>>
> old
>
>>>BX metal-jacket cable was stapled to the uprights, no way to get it out
>>>without makeing holes. The old wire was fraying, no way it could be
>>>
> saved.
>
>>>SO -- define the problem: The old WIRE needed to be replaced. The metal
>>>jacket -- the part that couldn't be removed -- was fine. Use the old
>>>
> wire to
>
>>>pull a new piece of Romex through the old jacket -- problem solved the
>>>simple way -- No holes, no mess.
>>>
>>>==========================================================
>>>Chris Candreva -- chris@westnet.com -- (914) 967-7816
>>>WestNet Internet Services of Westchester
>>>http://www.westnet.com/
>>>
>>>
>>>
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>>
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Received on Mon Jul 15 12:35:22 2002