Re: Screen on my G05 getting larger, then smaller

I'm on vacation in Las Vegas to bring all of you the latest information
on the newest vector games (shouldn't take that long ;) )

But I digress. On your machine I'd be checking the solder on the
wirewound yoke return resistor. If the connection would go flaky the
picture would shrink. Or the resistor itself could be bad.

Remember, a vector monitor is partly a stereo amp so you can treat is as
one and just swap the X and Y inputs. If the other axis now has the
problem it's the board, if it's the same axis it's the monitor (but you
already know all of that, don't you?)

Another test, get out the old XY scope and hook it to the inputs of the
monitor. It should be rock solid if the game board is OK. Now hook it
up to the sense resistors instead. If it's still rock solid the
resistors are the problem, if not then something else on the monitor is
changing the gain.

Neil Bradley wrote:

>>>While playing Asteroids (or Asteroids Deluxe or any ZVG driven game), the
>>>screen will be normal sized, then suddenly get larger vertically (it
>>>
>>>
>>Sounds like a problem with the vector generator!
>>Good thing it's still under warranty. ;-)
>>Doesn't Retrocade emulate the flaky vector h/w too...
>>
>>
>
>I wish it was that easy, but it does it with an Asteroids board, an
>Asteroids Deluxe board, and the ZVG, so it's definitely the monitor. ;-)
>
>
>
>>Is it symmetrical? If so, then the problem will be earlier in the food chain.
>>If not, check in the signal path for the affected half of the Y axis.
>>
>>
>
>Good idea - I'll get the schems.
>
>
>
>>I'm assuming it is _not_ affecting the X axis, so as to exonerate the HV.
>>
>>
>
>Correct - the X axis is perfect.
>
>
>
>>I don't care if the system is smoking, it's _got_ to be software.
>>
>>
>
>I know many hardware engineers who think this, too. ;-)
>
>-->Neil
>
>-------------------------------------------------------------------------------
>Neil Bradley What are burger lovers saying
>Synthcom Systems, Inc. about the new BK Back Porch Griller?
>ICQ #29402898 "It tastes like it came off the back porch." - Me
>
>---------------------------------------------------------------------------
>** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
>** message body to vectorlist-request@synthcom.com. Please direct other
>** questions, comments, or problems to vectorlist-owner@synthcom.com.
>
>
>
>

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to vectorlist-owner@synthcom.com.
Received on Wed Sep 18 22:25:05 2002