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?
>
>

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

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Received on Tue Mar 23 16:25:08 2010