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Comet plays perfect except no GI on playfield
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Dave Hofman
Sep 13, 2012, 12:09:36 AM9/13/12
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I have 6.3V at the power supply board 3J9 connector. All fuses that I could find tested fine. The lamp test turns all game controlled lights on but GI does not work. Any ideas to try would be greatly appreciated!
EM PINMAN
Sep 13, 2012, 12:55:44 AM9/13/12
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On Wednesday, September 12, 2012 10:09:37 PM UTC-6, Dave Hofman wrote:
> I have 6.3V at the power supply board 3J9 connector. All fuses that I could find tested fine. The lamp test turns all game controlled lights on but GI does not work. Any ideas to try would be greatly appreciated!
Have you checked the GI fuse holder to see if there is a bad wire connection or if the holder itself is bad?
> I have 6.3V at the power supply board 3J9 connector. All fuses that I could find tested fine. The lamp test turns all game controlled lights on but GI does not work. Any ideas to try would be greatly appreciated!
Ken
Dave Hofman
Sep 13, 2012, 1:07:29 AM9/13/12
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Ken,
Are you referring to the F3 fuse located on the power supply board? I tested that fuse and it was good. I will pull it out and verify with it out of the game and that it i sthe correct value. 8A
Are you referring to the F3 fuse located on the power supply board? I tested that fuse and it was good. I will pull it out and verify with it out of the game and that it i sthe correct value. 8A
Dave Hofman
Sep 13, 2012, 1:20:40 AM9/13/12
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Fuse is an 8A and tested fine outside the game.
Ricjas
Sep 13, 2012, 1:45:08 AM9/13/12
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I think Ken meant for you to check the fuse holder itself and the solder joints on it. One of the fuse holder clips could be loose and not making good connection with the fuse.
Jason
Jason
Dave Hofman
Sep 13, 2012, 2:37:58 AM9/13/12
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Major Progress! All GI lights work in head and the playfield EXCEPT the larger (bulb 89) I did a display test and they did not light. The problem turned out to be the connectors. I tightened up the contacts and that did the trick. Any ideas why the larger bulbs would be having an issue? They might be on a different circuit (18vdc) which appears to go to a different connector 3J1. I will check th econtacts on that connector and report back. Thanks for everyones input. It makes it so much more fun when progress is made, even slow progress.
Dave Hofman
Sep 13, 2012, 2:46:21 AM9/13/12
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I tightened up the connector contacts. Way better connection, but made no difference. I don't know what the startup should sound like. I hear screams but then it sounds like I might have some solenoid issues. Sounds like coils locked on. Could that be related to the larger bulbs not working? Going to bed! I will try looking at solenoids tomorrow unless you guys have more ideas to try.
TheKorn
Sep 13, 2012, 4:38:58 AM9/13/12
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Dave Hofman <david.hofman%easystr...@gtempaccount.com> wrote in
news:7d2b662d-7347-45bf...@googlegroups.com:
Your big bulbs (as you put it) are called flashers. They... flash. They are not
activated in all lamps mode; to the game they look (and act like) solenoids.
Your coils locking on may or may not be related. Kind of have to tackle them
individually until you have a reason to tie them together.
What kind of test equipment do you have?
--
Have a home video that's trapped on your camera? Want to share it on the web or on
DVD?
http://www.webwidevideo.com/
news:7d2b662d-7347-45bf...@googlegroups.com:
activated in all lamps mode; to the game they look (and act like) solenoids.
Your coils locking on may or may not be related. Kind of have to tackle them
individually until you have a reason to tie them together.
What kind of test equipment do you have?
--
Have a home video that's trapped on your camera? Want to share it on the web or on
DVD?
http://www.webwidevideo.com/
wayout440
Sep 13, 2012, 6:12:23 AM9/13/12
to
This all sounds like a newly aquired, older game. You should back up
the truck and analyze the game systematically, starting with overall
health of the power supply. Then the connectors from the supply, then
the solenoid board then the connectors to everything else.
It's fine to troubleshoot a singular problem when you have already had a
completely working game that has been gone over already. But if you
have not already done this it's wise to go over it inch by inch for
reliablity...you'll likely find a lot of potential problems that as
well.
On a Comet make sure to add fuses to the AC input side of the two
regulators to prevent the game from starting on fire. Search it on the
web, there's info out there on the specifics about this.
--
wayout440
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Dave Hofman
Sep 14, 2012, 1:42:39 AM9/14/12
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PROBLEM SOLVED GAME 100%
Thanks for everyones input. After scouring the internet I found another post from Clay where he mentioned that on another comet someone swapped 63's instead of using 89's on the playfield since the flasher bodies are the same size. I had previously tested the flashers and they were good. I didn't know that the head uses 63's and the playfield uses 89's. Apparently neither did the guy I bought the game from. I just played a few games and it i sa real fast game with a cleaned playfield and new rubbers. Thank sagain!
Dave
Thanks for everyones input. After scouring the internet I found another post from Clay where he mentioned that on another comet someone swapped 63's instead of using 89's on the playfield since the flasher bodies are the same size. I had previously tested the flashers and they were good. I didn't know that the head uses 63's and the playfield uses 89's. Apparently neither did the guy I bought the game from. I just played a few games and it i sa real fast game with a cleaned playfield and new rubbers. Thank sagain!
Dave
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