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Author Topic: Atari Centipede Cocktail table game has no power  (Read 10485 times)

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vapuser

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Atari Centipede Cocktail table game has no power
« on: January 28, 2020, 07:10:06 am »
Good morning, I own an Atari Centipede cocktail table game. The original problem was that the game would not power on anymore. So I took the power supply out of the unit and noticed that some of the voltages were a little off. I purchased and replaced the 27000 uf big blue capacitor and also the bridge rectifier circuit board. The voltages from that circuit now seems to be more in-line with the schematic. Since I took this power supply out of the unit over 5 years ago I can not remember where one of the plugs get plugged into. Specifically, it is a connector that comes off the bottom of the on/off switch. The on/off switch leads go into a wiring harness and this connector comes off that wiring harness just a few inches away. It's a six pin connector. There are two black wires, two white wires and a green wire in this connector. So it appears to be a power connector. As a matter of fact I used that connector to test for continuity of the on/off switch. I wanted to determine which position was "on" and which position was "off". I'm hoping someone can help me determine where this connector gets plugged into. I'm totally stumped.  I would love to see this game come back to life. Thanks in advance for your help.

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #1 on: January 28, 2020, 08:47:14 am »
I have a centipede cocktail at home. I get off work between 2 and 4pm CST. I can take a look at mine then and help you out.

vapuser

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Re: Atari Centipede Cocktail table game has no power
« Reply #2 on: January 28, 2020, 10:43:07 am »
Thanks Mike. :)

pbj

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Re: Atari Centipede Cocktail table game has no power
« Reply #3 on: January 28, 2020, 03:28:57 pm »
Hey vapuser, you bojo! Those boards don't work on water!

Unless you got power! Hahahah...



This forum needs more threads about Arcade 1Up cabinets.

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #4 on: January 28, 2020, 05:25:54 pm »
Well. I would have to pull the monitor to get a good look at that plug. Maybe this will help. If you still need me to pull the monitor and snap some pics I will do it.

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Re: Atari Centipede Cocktail table game has no power
« Reply #5 on: January 28, 2020, 05:32:31 pm »
Here is a link to the Centipede service manual.

https://www.arcade-museum.com/manuals-videogames/C/Centipede.pdf

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Re: Atari Centipede Cocktail table game has no power
« Reply #6 on: January 28, 2020, 05:53:45 pm »

vapuser

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Re: Atari Centipede Cocktail table game has no power
« Reply #7 on: January 28, 2020, 06:45:35 pm »
Thanks Mike. I do have a copy of the Operation, Maintenance and Service Manual. I also have the electrical schematics of the power supply. I'm just not seeing where to physically plug in that 6 pin male connector. I can see J2, J3 and J5 connectors on the power supply but I can't see where the female corresponding connector is for that male power connector. Do you think it can it be located on another board?

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Re: Atari Centipede Cocktail table game has no power
« Reply #8 on: January 28, 2020, 06:47:02 pm »
I am watching a movie with my daughter. I will dig in there after the movie and let you know.

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Re: Atari Centipede Cocktail table game has no power
« Reply #9 on: January 28, 2020, 07:00:27 pm »
Mike, I found the problem. I now remember that I had put a white and black jumper in J2 so that I could test out the power supply. So I removed those jumpers and plugged that male power connector into J2. Now back to my original problem, I still have no power. No lights and no sound. Where to start. Any suggestions?

jennifer

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Re: Atari Centipede Cocktail table game has no power
« Reply #10 on: January 28, 2020, 07:17:07 pm »
Start at the fuse block.

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #11 on: January 28, 2020, 07:22:11 pm »
Start where the power comes out of the wall and figure out where it stops.

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Re: Atari Centipede Cocktail table game has no power
« Reply #12 on: January 28, 2020, 07:47:00 pm »
If memory serves...If the top is open it won't work, It has an interlock safety swich.

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Re: Atari Centipede Cocktail table game has no power
« Reply #13 on: January 28, 2020, 07:51:24 pm »
Just pull out on the interlock. It will stay on.

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Re: Atari Centipede Cocktail table game has no power
« Reply #14 on: January 28, 2020, 07:59:29 pm »
Well ya...but did he?

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #15 on: January 28, 2020, 08:09:14 pm »
That is why it is good you brought it up.

vapuser

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Re: Atari Centipede Cocktail table game has no power
« Reply #16 on: January 29, 2020, 06:26:12 am »
Sounds good. I think I'll recheck the voltages from the primary winding at J2 and work my way over to the secondary windings. I did check all the fuses for continuity. they all appear to be fine. I didn't know that you can pull up on the interlock switch to keep it activated. Thanks. I'll keep you posted on my progress.  :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #17 on: January 29, 2020, 07:08:08 am »
It is surprising how many people don't know that. I have pulled that interlock switch trick on people who know way more about this stuff than I do.

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Re: Atari Centipede Cocktail table game has no power
« Reply #18 on: January 30, 2020, 06:41:30 am »
Good morning, Well, as you suggested, I went through and rechecked all the voltages from the power cord to the output of the power supply. I found two bad fuses and replaced them. the original fuses were 7 amp, 250 volt. The closest I could find were 10amp 250 volt. Do you think that the extra 3 amps will put too much strain on the circuit? The output voltages from J5 coming from the secondary winding of the power supply were as follows: Pins 1,5 and 2,5 and 3,5 should read 10.6 VDC. The actual reading was 10.4 VDC. The reading from pins 6 and 76 should be 36 VAC and was 35 VAC. The Reading from Pins 8 and 9 should be 6.1 VAC and actually read 6.2 VAC. The reading from pins 10 and 12 should be 60 VAC and actually read 105.8 VAC which is too high. The other voltages I believe are within tolerance, but that last AC voltage may be causing a problem. Please see attachment. I'm not sure what's causing that problem. Maybe one bad winding on the transformer? More importantly, how can I correct it? I also now need a schematic that shows where those voltages feed into and how to correct that high voltage. Any suggestions?  :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #19 on: January 30, 2020, 07:07:45 am »
PL1 posted a link to the power supply schematic. The information should be there.

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Re: Atari Centipede Cocktail table game has no power
« Reply #20 on: January 30, 2020, 08:08:26 am »
I did the same sort of testing here: http://forum.arcadecontrols.com/index.php/topic,161506.msg1703158.html#msg1703158

You should use the right size fuse.  If you use a 10A fuse and it calls for a 7A fuse..  then the extra 3A the *bigger* fuse allows is the extra 3A to fry your boards (or whatever that particular fuse uses.

The voltage is unregulated - If you want to know much its really putting out - it has to be connected to a load.  I've used 100w lamps as a load to test and check voltages that way..  Big swings are not uncommon.
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Re: Atari Centipede Cocktail table game has no power
« Reply #21 on: January 30, 2020, 08:13:10 am »
Now keep working your way forward until you have no power.

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Re: Atari Centipede Cocktail table game has no power
« Reply #22 on: January 30, 2020, 08:48:05 am »
I found two bad fuses and replaced them. the original fuses were 7 amp, 250 volt. The closest I could find were 10amp 250 volt. Do you think that the extra 3 amps will put too much strain on the circuit?
Pull that 10A before you fry something.   :whap

If something is drawing enough current to blow the 7A fuse, over-amping the replacement protects the inexpensive fuse by possibly sacrificing the expensive electronics the fuse was supposed to protect.   >:D

When substituting fuses, it is safe to over-voltage so there's less chance of arcing or under-amp so the fuse blows with less current draw or faster blow-timeNEVER the other way.

The correct fuse values are in the diagram/parts breakdown on pages 47-48 of the manual here.


Scott
« Last Edit: January 30, 2020, 08:51:08 am by PL1 »

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #23 on: January 30, 2020, 08:56:02 am »
It is not difficult to source the correct fuses. There is no point in throwing in the wrong fuse and praying something won't fry.

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Re: Atari Centipede Cocktail table game has no power
« Reply #24 on: January 30, 2020, 11:00:09 am »
I would have expected something to pop on at this point. Those two blown fuses were probibally trying to point out your trouble, My guess is one was for the chassis, and more specifically to a bad flyback (given its age) normally if you look at it you will a burnt looking crack in it if it is bad, leak nasty goo, or just be dead, in a dark room like a Tesla coil it may also shoot voltage, In any case approach this with extreme caution (and +1 on changing that fuse back to a 7amp)....Power to the boards test would also be on my list, making sure your getting DC out of that regulator where applicable
« Last Edit: January 30, 2020, 11:09:37 am by jennifer »

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Re: Atari Centipede Cocktail table game has no power
« Reply #25 on: January 30, 2020, 02:34:19 pm »
Good afternoon, I'll have to order those fuses online. I can't seem to find a place locally that carries them.  I'm sure Amazon must carry them. I'm also going to need the hinged arm that holds up the table top in a vertical position. Is there a place where everyone orders parts from? I might have to fabricate that part myself. So bperkins01, you're thinking I don't have to worry about the 105.8 VAC from pin 10,12. That's good to here. After I replace those fuses, I'll continue through the circuit and try to find where my voltage is stopping. Thanks for everyone's help. I'm determined to get this game working! :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #26 on: January 30, 2020, 03:19:57 pm »
If you really want to test it to be sure..
Using the info below and the schematic -  Connect a 100w light bulb  to pin 10 and pin 15 from an every day lamp (old fashion incandescent bulb)
Jump pin 12 to pin 13 to put the two 60v windings in series (creating 120v)  (this is exactly what is done in the wiring harness to get 120V to the monitor.

Once your lamp lights up - test the voltages as you did before...  now that there is an actual load ..  it will all test very close to spec (60v, 120v, etc) If there truly is an issue with the transformer - you will see it with this test.
Make sense?

The remaining pins are specific to Centipede
Pin 10 - 11 -> 30 vAC
Pin 11 - 12 -> 30 vAC
Pin 10 - 12 -> 60 vAC

Pin 13 - 14 -> 30 vAC
Pin 14 - 15 -> 30 vAC
Pin 13 - 15 -> 60 vAC
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Re: Atari Centipede Cocktail table game has no power
« Reply #27 on: January 30, 2020, 03:30:20 pm »
It is not difficult to source the correct fuses. There is no point in throwing in the wrong fuse and praying something won't fry.

Ain't nothing frying at 10 amps that wasn't already frying at 7 amps.  You guys are such drama queens.

This forum needs more threads about Arcade 1Up cabinets.

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Re: Atari Centipede Cocktail table game has no power
« Reply #28 on: January 30, 2020, 03:33:47 pm »
Not everybody can be a wildman outlaw like you. ;)

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Re: Atari Centipede Cocktail table game has no power
« Reply #29 on: January 30, 2020, 03:36:47 pm »
It is not difficult to source the correct fuses. There is no point in throwing in the wrong fuse and praying something won't fry.

Ain't nothing frying at 10 amps that wasn't already frying at 7 amps.  You guys are such drama queens.

ok - I'll cave on that one..  7A will fry it too..  :notworthy:
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Re: Atari Centipede Cocktail table game has no power
« Reply #30 on: January 31, 2020, 07:19:34 am »
bperkins01, I like that idea, but the connector at pin 15 is blank. Is your J5 connector not the same way? So there really is no 60 volts outputted to the circuit across pin 13 - 15 from what I can tell. I never checked the center tap for 30 volts across pin 13 - 14. I just figured that the last 60 volt winding wasn't being used. How about if I use that same positioned jumper, which should give me 90 volts across pins 10 - 14 and 60 volts across 10 - 12. I can check the two additional center taps as well for 30 volts. The incandescent bulb won't be as bright positioned across 10,14 but will still be providing a load. if you think that's a viable solution, I can do all that tonight when I get home from work.

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Re: Atari Centipede Cocktail table game has no power
« Reply #31 on: January 31, 2020, 07:28:50 am »
bperkins01, I like that idea, but the connector at pin 15 is blank. Is your J5 connector not the same way? So there really is no 60 volts outputted to the circuit across pin 13 - 15 from what I can tell. I never checked the center tap for 30 volts across pin 13 - 14. I just figured that the last 60 volt winding wasn't being used. How about if I use that same positioned jumper, which should give me 90 volts across pins 10 - 14 and 60 volts across 10 - 12. I can check the two additional center taps as well for 30 volts. The incandescent bulb won't be as bright positioned across 10,14 but will still be providing a load. if you think that's a viable solution, I can do all that tonight when I get home from work.

Unless your Power Brick is different on the cocktail vs. the upright..  you should have a pin on 15.  You need the 2 x 60v circuits to get you 120v for the monitor.
Maybe the pin pushed in?  Take the power brick out and check from the back side..  The links the the schematics and my prior link shows how to look at this..
HTH
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Re: Atari Centipede Cocktail table game has no power
« Reply #32 on: February 03, 2020, 06:52:55 am »
bperkins01, As you mentioned, the power brick may be wired differently on a Cocktail table model. Maybe someone can confirm that for us. It sure seems that way. Over the weekend, I removed the brick from the game console and recalculated all the AC voltages using a 100w bulb as a load. I also added additional pictures to see the front and back view of the J5 connector to show the missing wires and pins. I also uploaded additional pics to show the front and back view of the J5 plug from the Harness inside the console. I'll also include an updated view of my notes to show the current voltages that were displayed. Just as a recap on the voltages I took were as follows: 1,5 2,5 and 3,5 were 10.4 VDC. The following AC voltages were read using a 100 w light bulb load: 6,7 35.6 VAC, 8,9 6.2 VAC, 10,12 102.5 (Too high, should be 60), 10,14 123,8 VAC. See pics for a detailed view of the connectors.

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Re: Atari Centipede Cocktail table game has no power
« Reply #33 on: February 03, 2020, 07:00:04 am »
Stop chasing your tail verifying voltages.

Measure where you have power. Work your way forward until you don't have power. That is where your problem will be.

It is odd that you don't have any power at all. It almost has to be a fuse.

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Re: Atari Centipede Cocktail table game has no power
« Reply #34 on: February 03, 2020, 07:50:10 am »
You can also work the other way. You know where the power is supposed to end up. Start there and work backwards.

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Re: Atari Centipede Cocktail table game has no power
« Reply #35 on: February 03, 2020, 08:13:56 am »
First Q:
I went back and read your original question:
The 6 pin connector - J2 - is where the interlocks plug in - If you have nothing plugged into it - that's your problem.. The connector is hiding inside your cabinet someplace.
Did you find that?

Second:
Your transformer is different than mine,  I'm betting the 102v is also fine..  Maybe its an ARI and not an ARII.  I'd have to go look at other schematics

Either way
Whats the answer to Q1?


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Re: Atari Centipede Cocktail table game has no power
« Reply #36 on: February 03, 2020, 08:14:46 am »
If he traces his way backward he will find it.

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Re: Atari Centipede Cocktail table game has no power
« Reply #37 on: February 03, 2020, 08:15:39 am »
If he traces his way backward he will find it.
Agreed :)
My Arcade Cabinet Build and other projects here:
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Re: Atari Centipede Cocktail table game has no power
« Reply #38 on: February 03, 2020, 08:41:04 am »
That wire nut looks suspicious to me, those were usually crimped, and would expect to see a grommet or something there, somebody has done work...I would take a closer look in that area.
« Last Edit: February 03, 2020, 08:44:08 am by jennifer »

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Re: Atari Centipede Cocktail table game has no power
« Reply #39 on: February 03, 2020, 08:45:41 am »
Mike, I found the problem. I now remember that I had put a white and black jumper in J2 so that I could test out the power supply. So I removed those jumpers and plugged that male power connector into J2. Now back to my original problem, I still have no power. No lights and no sound. Where to start. Any suggestions?

It looks like J2 goes to the interlock switch and the power switch. Both of those could cause no power to flow to the rest of the cab.