Re: newbie - Battlezone problems.

Try to connect WDDIS test point (watchdog disable) to ground. This keeps the
Watchdog from resetting the (badly running) processor from rebooting, before it
would be able to make any sound or displaying any picture. Ofcourse the problem
is still there but at least you can see any life signs.

If this doesn't change anything, I would check for present clocking signals, and
then on to the data/address bus line activity. In all cases, best is to use a
o'scope, or if not availabe a logic probe gives you a clue about the state of
these signals.

Cya !

John Robertson wrote:
>
> You will now need a logic probe and some electronics skills. Unfortunatly
> this sounds like a locked up board. With a logic probe check the CPU IC for
> signs of Clock, pulsing Reset, NMI pulsing (I think on this board), and
> presence of pulses on all the data and most of the address lines. You have
> tried re-seating all of the socketed ICs already, haven't you? Have you
> schematics of the logic board?
>
> John :-#)#
>
> At 01:15 PM 2/6/2000 +0000, you wrote:
> > >UNPLUG THE MONITOR. XY monitors can DIE if they are
> > >run with defective boards or power supply.
> >
> >OK I did that. I didn't realise I could kill the monitor but I didn't
> >think that bright dot in the middle of the screen would do it much good.
> >
> >I get no game sounds and no coinup sound.
> >
> > >Now check the voltages, safely.
> >
> >All voltages appear correct
> > >>I checked the voltages on the regulator board and all the test points
> > >>appear to give the correct value.
> > >>
> > >>The larger logic board has the +5 LED lit but on the smaller board the
> > >>+5v LED is NOT lighting. I checked the voltages on the test points on
> > >>this board and it does appear to be receiving +5v (4.8v or so on the
> > >>test point close to the led).
> >
> >--
> >
> > >If voltages are all OK, then put the game into self test (switch should
> > >either be on coin door or beside volume control) listen for the self test
> > >beeps etc as described in the manual.
> >
> >Right - I did this and I get no beeps. I also checked that the volume
> >pot wasn't turned down.
> > >
> > >Call Vectorlist after these tests are done for more help....
> >--
> >James G Watt
> >
> >http://www.kinetic-arts.demon.co.uk
> >Part of the Video Arcade Game Collectors WebRing.
> >
> >You are in a maze of twisty little passages, all alike.
> >---------------------------------------------------------------------------
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> >** questions, comments, or problems to neil@synthcom.com.
>
> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
> Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
> http://www.flippers.com
> "Old pinballers never die, they just flip out."
>
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Received on Sun Feb 6 16:18:08 2000