• Atari Superman electronic problems

    From daina@daina@shell.xmission.com (Daina Pettit) to rec.games.pinball on Monday, January 11, 2021 15:19:09
    From Newsgroup: rec.games.pinball

    I am working on an Atari Superman and found some curious problems. The game boots up and plays fine.

    1. Displays flicker and are very dim. Most of the time it's hard to tell
    what the score is.

    2. The MPU 9VDC test point shows 6VDC. Some of the other voltages are a little low (by less than 10%) so I didn't worry about them. Not sure what
    the 9VDC circuit does. On the schematic it seems to do nothing. I've got
    to be missing something here.

    3. The speaker has a rather loud annoying hum all the time.

    4. The owner said they were told that the capacitors were weak and that
    they should turn on the game and wait for 5 minutes or so for it to warm up before playing. I didn't see this problem.

    In looking at various documentation I couldn't find anything about the above
    4 items. Any ideas?

    Daina
    --
    Daina Pettit=daina@xmission.com, voice: (801)277-6296, msg: (801)277-0888
    Linux Consulting Salt Lake City, Utah http://www.MrPinball.com
    Mr. Pinball Classified--More Pinball Ads than ANYWHERE, and they're FREE!
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  • From Ken Layton@KLayton888@aol.com to rec.games.pinball on Monday, January 11, 2021 08:26:16
    From Newsgroup: rec.games.pinball

    On Monday, January 11, 2021 at 7:19:17 AM UTC-8, Daina Pettit wrote:
    I am working on an Atari Superman and found some curious problems. The game boots up and plays fine.

    1. Displays flicker and are very dim. Most of the time it's hard to tell what the score is.

    2. The MPU 9VDC test point shows 6VDC. Some of the other voltages are a little low (by less than 10%) so I didn't worry about them. Not sure what the 9VDC circuit does. On the schematic it seems to do nothing. I've got
    to be missing something here.

    3. The speaker has a rather loud annoying hum all the time.

    4. The owner said they were told that the capacitors were weak and that
    they should turn on the game and wait for 5 minutes or so for it to warm up before playing. I didn't see this problem.

    In looking at various documentation I couldn't find anything about the above 4 items. Any ideas?

    Daina
    --
    Daina Pettit=da...@xmission.com, voice: (801)277-6296, msg: (801)277-0888 Linux Consulting Salt Lake City, Utah http://www.MrPinball.com
    Mr. Pinball Classified--More Pinball Ads than ANYWHERE, and they're FREE!
    Sounds like bad filter capacitors if you've got hum.
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  • From John Robertson@spam@flippers.com to rec.games.pinball on Monday, January 11, 2021 10:48:16
    From Newsgroup: rec.games.pinball

    On 2021/01/11 7:19 a.m., Daina Pettit wrote:
    I am working on an Atari Superman and found some curious problems. The game boots up and plays fine.

    1. Displays flicker and are very dim. Most of the time it's hard to tell what the score is.

    2. The MPU 9VDC test point shows 6VDC. Some of the other voltages are a little low (by less than 10%) so I didn't worry about them. Not sure what the 9VDC circuit does. On the schematic it seems to do nothing. I've got
    to be missing something here.

    3. The speaker has a rather loud annoying hum all the time.

    4. The owner said they were told that the capacitors were weak and that
    they should turn on the game and wait for 5 minutes or so for it to warm up before playing. I didn't see this problem.

    In looking at various documentation I couldn't find anything about the above 4 items. Any ideas?

    Daina


    Hi Daina,

    I have some Atari notes here:

    https://www.flippers.com/atari_pin_service.html

    Sounds to me like the last problem shown on the page - bad connections
    at the bridge rectifiers...and it won't hurt to touch up the solder connections on the regulator PCB.

    John :-#)#

    --
    (Please post followups or tech inquiries to the USENET newsgroup)
    John's Jukes Ltd.
    MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
    (604)872-5757 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."
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  • From Paul@pefjr@comcast.net to rec.games.pinball on Monday, January 11, 2021 23:01:11
    From Newsgroup: rec.games.pinball

    On 1/11/2021 10:19 AM, Daina Pettit wrote:
    I am working on an Atari Superman and found some curious problems. The game boots up and plays fine.

    1. Displays flicker and are very dim. Most of the time it's hard to tell what the score is.

    2. The MPU 9VDC test point shows 6VDC. Some of the other voltages are a little low (by less than 10%) so I didn't worry about them. Not sure what the 9VDC circuit does. On the schematic it seems to do nothing. I've got
    to be missing something here.

    3. The speaker has a rather loud annoying hum all the time.

    4. The owner said they were told that the capacitors were weak and that
    they should turn on the game and wait for 5 minutes or so for it to warm up before playing. I didn't see this problem.

    In looking at various documentation I couldn't find anything about the above 4 items. Any ideas?

    Daina


    The Superman I just finished up not too long had the wait 5 minutes for
    it to boot up. I replaced all the electrolytic caps since they are what
    42 years old, big ones included (the 6800uf @ 75v is expensive $32).

    Once I replaced them, those issues went away. Ended up sending the
    boards to John Robertson to get my sound issues fixed. So the info John posted, you should definitely check out.

    And now I have another one to fix! Just ordered all the caps again :/

    Paul
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