Re: Asteroids graphics and sound issue

>>>>>>-----Original Message-----
>>>>>>On Sun. 3/21/10, at 2:53 PM, andre wrote:
>>>>>>
>>>>>>I am fixing an asteroids cocktail for a friend. It originally had just the
>>>>>>p1/2 lights flashing non stop. I replaced the eprom sockets and all of the
>>>>>>ram following the test tones.
>>>>>>Now it works..sorta..
>>>>>>
>>>>>>It has 2 issues.. the first is a graphical issue. The gamefield fills the
>>>>>>screen fine, but everything is microscopic.. the ship and asteroids are only
>>>>>>a couple mm big, and you can see the text.. it looks like text.. but far too
>>>>>>small to read. You can see your shots and the ufo's shots. I have replace chips
>>>>>>in the scaling circuit at K5, K7, M7 and swapped a good 7497 through the 4
>>>>>>socketed banks all with no difference. I also tested Q7 and Q9 as good..
>>>>>>not sure where to go from here.
>>>>>>
>>>>>>2nd issue is in the sounds. All sounds are fine except for the player's shots,
>>>>>>and the ufo's firing sounds. They sound more like morse code tone when you fire.
>>>>>>I checked Q1, Q5. Replaced a few electrolytics, changed n9 on the basis of
>>>>>>another repair log, c65.. I do not have any ls259's for M10, and have not
>>>>>>checked the 324 at L8 which I think is the only thing in common but not sure
>>>>>>if that would do it?
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>On Mon, 3/22/10, 1:10 PM, teeray wrote:
>>>>>
>>>>>Scale - Check the ls161's D7, C7, B7
>>>>>
>>>>>Sound - Check L8, M9
>>>>>
>>>>>Tim
>>>>>
>>>>>
>>>>
>>>>
>>>>On Mon, 3/22/10, at 9:44 PM, andre wrote:
>>>>
>>>>Thanks.. the 4016 at M9 was the sound culprit.. after replacing that I lost the
>>>>thump sound.. So replaced the 555 at N8 and got that back.
>>>>
>>>>So far in the scale section I have replaced E7, M7, F6 and comparator'd
>>>>B7,C7,D7,A9,M6,A9 and all come out ok... The more I look at it it might not just
>>>>be scale.. everything is very tiny, but I notice especially when something
>>>>explodes, the explosion is along a horizontal plane.. it has a brighter dot at
>>>>each end with smaller dots inbetween with the line about a 1/4 inch long. Also, it
>>>>does not take one of the micro asteroids to hit the dot that is the players ship
>>>>exactly for a collision.. if its about a 1/4 inch away on the screen for the ship
>>>>it will be a collision.. if it was 'just' scale I would think the dots would need
>>>>to physically meet.
>>>>
>>>>
>>>
>>>On Tue, 3/23/10, 1:36 AM, John Robertson wrote:
>>>
>>> If you have a logic probe or 'scope, check the inputs to the DACs to make
>>>sure all data lines are toggling. If the most significant bits are not then
>>>backtrack from there. If all bits are toggling then check your +/- 15VDCsupply...
>>>
>>>Heck check ALL the voltages first and save some time! I think you may have a
>>>missing supply on the logic board...
>>>
>>>John :-#)#
>>>
>>>PS, please don't top post - post under the reply - and also do not clip off
>>>previous portions of messages (you can trim small bits if it helps clarity)
>>>as it gets harder and harder to track the progress of the troubleshooting
>>>process if we have to open older messages to see what the original complaint
>>>was! Thanx.
>>>
>>>--
>>>John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
>>>Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
>>> www.flippers.com
>>>"Old pinballers never die, they just flip out"
>>>
>>>
>>
>>
>>On Mar 23, 2010 11:30 AM, andre wrote:
>>
>>Was not aware every one was top posting.. I am just replying from my mail program..
>>is there some other way to reply so they follow in a thread?
>>
>>
>
>
>On Mar 23, 2010 4:25 PM, teeray wrote:
>
>Could you post a picture of the screen, also one of the test screen
>somewhere for us to see.
>
>Does the test screen display OK, just microscopic?
>
>Tim
>
>

For the picture to look correct but just be small. It has to be something
affecting both the X and Y outputs.
Maybe F10

Tim

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Received on Tue Mar 23 17:38:51 2010