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Author Topic: Atari Centipede Cocktail table game has no power  (Read 10631 times)

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bperkins01

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Re: Atari Centipede Cocktail table game has no power
« Reply #40 on: February 03, 2020, 08:51:55 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.

I missed that - so the mystery of J2 has been solved :)

Jennifer - the wire nut part is where a panel mount fuse holder should be - that would also kill power to everything if that was screwed up.  But not likely since power has already been measured down stream.  (However - I'd get the proper holder and return it to normal)
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Re: Atari Centipede Cocktail table game has no power
« Reply #41 on: February 03, 2020, 02:09:39 pm »
The mystery of J2 was solved long ago. Also there is a proper fuse holder where the power comes in. All is good there as well. We're at J5 now where the voltages don't match up to the schematic. Did my 7 pics that I uploaded this morning not show up? 10,12 is showing 102.5 VAC, should be 60 VAC. Pins 11 and 13 are blank, no wires or metal pin. Pin 15 on the underside of the power supply has a green wire that is fastened to the chasey. I wonder if there is anyone out there that could verify these pin configurations. This game did work properly at one time with this configuration. I'm still thinking that a winding on the transformer went bad.  :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #42 on: February 03, 2020, 02:17:59 pm »
The mystery of J2 was solved long ago. Also there is a proper fuse holder where the power comes in. All is good there as well. We're at J5 now where the voltages don't match up to the schematic. Did my 7 pics that I uploaded this morning not show up? 10,12 is showing 102.5 VAC, should be 60 VAC. Pins 11 and 13 are blank, no wires or metal pin. Pin 15 on the underside of the power supply has a green wire that is fastened to the chasey. I wonder if there is anyone out there that could verify these pin configurations. This game did work properly at one time with this configuration. I'm still thinking that a winding on the transformer went bad.  :)

There is a single pic of the underside of the power brick.. that's it.
you see what we see on the thread.
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Re: Atari Centipede Cocktail table game has no power
« Reply #43 on: February 03, 2020, 02:24:13 pm »
When I get home from work I will measure some voltages for you on my machine. If you are getting voltage at J5 your monitor should be receiving power. I think it is pin 10 and 15. I will double check that when I get home.

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Re: Atari Centipede Cocktail table game has no power
« Reply #44 on: February 03, 2020, 08:17:39 pm »
Here is what my original schematic says.



Pin 10,12 should be 100VAC

11 and 13 are blank.

pin 15 is earth ground.



bperkins01

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Re: Atari Centipede Cocktail table game has no power
« Reply #45 on: February 03, 2020, 08:41:32 pm »
Odd the cocktail has such a different power supply - but that mystery solved too!
Nice   :)
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Re: Atari Centipede Cocktail table game has no power
« Reply #46 on: February 03, 2020, 08:45:30 pm »
I should have dug my original schematics out sooner.

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Re: Atari Centipede Cocktail table game has no power
« Reply #47 on: February 03, 2020, 08:46:59 pm »
hmmm beer...
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Re: Atari Centipede Cocktail table game has no power
« Reply #48 on: February 03, 2020, 08:52:58 pm »
There is a visceral feeling when you unfold the schematics and spread them out over a table. Same thing with flipping through a manual.

It seems a little sad that the younger folk will never know that feeling.

Maybe they are not missing anything. :dunno

I prefer the treasure map feel of the experience.

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Re: Atari Centipede Cocktail table game has no power
« Reply #49 on: February 03, 2020, 08:54:36 pm »
well ya!  I thought I downloaded everything Centipede - but the one you have is different.
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Re: Atari Centipede Cocktail table game has no power
« Reply #50 on: February 03, 2020, 08:59:23 pm »
I never had to dig into it. My cab is a B or C in outward appearance, but it has been electronically trouble free.

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Re: Atari Centipede Cocktail table game has no power
« Reply #51 on: February 04, 2020, 06:14:40 am »
I'll try to upload those pics again. Maybe I'll try just one at a time. The text post that I included with those pics didn't go through either. Strange. Here is the Male plug on Harness.

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Re: Atari Centipede Cocktail table game has no power
« Reply #52 on: February 04, 2020, 06:16:22 am »
Here's my notes on the Connector with Updated voltages.

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Re: Atari Centipede Cocktail table game has no power
« Reply #53 on: February 04, 2020, 06:17:46 am »
Here's a pic of the J5 female connector from on top of the Power Supply.

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Re: Atari Centipede Cocktail table game has no power
« Reply #54 on: February 04, 2020, 06:19:06 am »
Here is a pic of the J5 Female Connector from underside of the power supply.

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Re: Atari Centipede Cocktail table game has no power
« Reply #55 on: February 04, 2020, 06:20:27 am »
Here is a pic of the J5 Male connector plug inside the game console.

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Re: Atari Centipede Cocktail table game has no power
« Reply #56 on: February 04, 2020, 06:20:45 am »
Reply 44 answers your questions about J5.

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Re: Atari Centipede Cocktail table game has no power
« Reply #57 on: February 04, 2020, 06:22:18 am »
Here's a pic of the J5 Male wire side of the connector.

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Re: Atari Centipede Cocktail table game has no power
« Reply #58 on: February 04, 2020, 06:36:12 am »
Before I go any further through the circuitry, I would like to establish that these are the correct voltages that I need to supply all the electrical components. And so far, according to the schematic, it appears that my voltages are off. I'm surprised that there isn't anyone with a cocktail table that can confirm what I have so far is correct or not. Frustrating.

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Re: Atari Centipede Cocktail table game has no power
« Reply #59 on: February 04, 2020, 06:50:40 am »
Before I go any further through the circuitry, I would like to establish that these are the correct voltages that I need to supply all the electrical components. And so far, according to the schematic, it appears that my voltages are off. I'm surprised that there isn't anyone with a cocktail table that can confirm what I have so far is correct or not. Frustrating.

MikeA answered this in reply#44 - Your 100v is correct.
The cocktail version of Centipede has a different power brick (and schematic) than the upright - that explains the variations from the other power bricks.

I went back and looked at your numbers -  at this point - your issue is not in the power brick. 
Schematic shows 10 - 12 = 100v,  10- 14 = 120v

If you have no power to ANYTHING with it plugged in to the game - I would try not plugging in the 6 hole connector to your harness and keep it on bypass.  You may have an open circuit on the interlock switches..  which would mean - nothing worked..
Make sense?







« Last Edit: February 04, 2020, 07:11:33 am by bperkins01 »
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Re: Atari Centipede Cocktail table game has no power
« Reply #60 on: February 04, 2020, 09:19:30 am »
Thanks bperkins01, Sounds good, I'll hook up the brick back in the console and leave the two jumpers in J2 to bypass the switch. I'll check it out again tonight when I get home and give you an update tomorrow. Thanks again for your help. :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #61 on: February 04, 2020, 09:21:14 am »
Thanks bperkins01, Sounds good, I'll hook up the brick back in the console and leave the two jumpers in J2 to bypass the switch. I'll check it out again tonight when I get home and give you an update tomorrow. Thanks again for your help. :)
and MikeA - he had the correct schematic - but you should be on the right track. 
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Re: Atari Centipede Cocktail table game has no power
« Reply #62 on: February 04, 2020, 12:37:07 pm »
Mike, thanks for that schematic. That is the one I should have and don't. Is there a link to that somewhere? Very helpfull!!

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Re: Atari Centipede Cocktail table game has no power
« Reply #63 on: February 04, 2020, 12:43:03 pm »
When I get home from work I will take a bunch of pics and upload them here.

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Re: Atari Centipede Cocktail table game has no power
« Reply #64 on: February 05, 2020, 06:50:28 am »
Good morning all. Well, I installed the brick back into the console. I left the jumpers in J2 to bypass the interlock switch. I still have the same power to J5, but when I put the coins in the game, no lights, no sound, no life. I need to continue to trace out the circuit. As soon as Mike uploads more schematic pics, I'll keep working upstream. Maybe next I'll check out the voltages at the coin receptor. Not sure if that's the next logical check point. I wonder if there are any other fuses that I'm not aware of, other than the ones on the PS. I feel that I should be seeing or hearing something. Again, thanks for all you help!

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Re: Atari Centipede Cocktail table game has no power
« Reply #65 on: February 05, 2020, 07:06:30 am »
Since J5 has power, check for power at the monitor plug next.

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Re: Atari Centipede Cocktail table game has no power
« Reply #66 on: February 05, 2020, 07:52:51 am »
Good morning all. Well, I installed the brick back into the console. I left the jumpers in J2 to bypass the interlock switch. I still have the same power to J5, but when I put the coins in the game, no lights, no sound, no life. I need to continue to trace out the circuit. As soon as Mike uploads more schematic pics, I'll keep working upstream. Maybe next I'll check out the voltages at the coin receptor. Not sure if that's the next logical check point. I wonder if there are any other fuses that I'm not aware of, other than the ones on the PS. I feel that I should be seeing or hearing something. Again, thanks for all you help!
What Mike said - but the power supply - supplies a few different circuits - that's why there are a few voltages.. Monitor, board, lights on the coin door, etc..  If nothing at all is showing life - its *sounds* like your ground wire is detached someplace - probably close or at the J5 connector.  Tug at the wire at the connector and down stream of it..

Many voltages out - one ground wire back.  (except the monitor - its on its own)

Continuity on the ground wire is easy to check with a meter.. 
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Re: Atari Centipede Cocktail table game has no power
« Reply #67 on: February 05, 2020, 12:08:15 pm »
Ok, I May not be able to check tonight again but I'll check that chassis ground for continuity tomorrow night. Thanks. :)

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Re: Atari Centipede Cocktail table game has no power
« Reply #68 on: February 05, 2020, 10:42:19 pm »


I hope this helps.

If you need a higher res image, PM me your email address. I will send you the full res file.

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Re: Atari Centipede Cocktail table game has no power
« Reply #69 on: February 06, 2020, 04:08:35 pm »
Yep, Mike, I actually flip that bottom switch on and off instead of unplugging from the wall. Anxious to see the full res file. I'll check the green grounds as well as the voltages at the coin receptor. I have a two player receptor. I don't see the voltages on the schematic for that plug. When I put the coins in, they just fall right through to the box below. I forgot if that's the way it's suppose to work, or is that because there is a lack of voltage at the plug going to the mechanism. It's been a while since I played on this game. I can't remember.

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Re: Atari Centipede Cocktail table game has no power
« Reply #70 on: February 06, 2020, 04:17:32 pm »
Coins will fall straight through until the game is powered up and ready to accept coins.  Its a pretty smart mechanism.  There is a small solenoid that the PCB tells to engage when the game is ready.  That way it doesn't take a quarter when its powered off.

You should be able to test for power with all the info you have however.. Just work you way out from the power supply...
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Re: Atari Centipede Cocktail table game has no power
« Reply #71 on: February 10, 2020, 07:51:10 am »
Good morning all, Mike, thanks for that schematic image! huge help. Well I did more testing over the weekend. I started by creating some notes of the wiring harness to get a visual idea of the flow of things. See attachment. I first starting testing the power at the monitor's 3 pin connector. The voltage was 126.6 VAC. I also checked the voltage at the monitor's 6 pin plug - No Voltage. I continued to check the voltage at the coin mechanism. The voltage across pins 10 and 11 was 6.3 VAC. No other voltages at that plug were present. I also took apart and viewed the connectivity of the volume control, Self Test switch and the Coin switch. All seemed to be working fine. I don't know why the coin switch is a momentary type switch, wired in the (Normally Opened position). I'm not sure what that switch does. When I was checking out those switches I noticed that the ground wire from there was loose. So I cleaned the eyelet and tightened the screw. As I've been checking through the circuitry, I haven't noticed any other loose ground wires. Still no life. I'll continue testing.

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Re: Atari Centipede Cocktail table game has no power
« Reply #72 on: February 10, 2020, 08:05:04 am »
Still sounds like a bad ground connection.
You have voltage everywhere and nothing works.
I'd check the wiring harness for continuity from the first ground wire each step along the way..
ie.  Positive power is getting all the way through the wire - but is getting stopped on the return side.

Clip one lead of the meter to a known good ground (post with green wire on power brick)
The test for continuity to everything else - starting at pin 4-5 on the power supply connector, then the ARII board, etc..
Your likely to find an open circuit very early - between the Power supply/ARII/PCB - since after the PCB most of the power fans out.
Do this with the power off on the machine.

fyi:  the 6 pin connector for the monitor is the video wire (the HDMI connector of 1981)
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Re: Atari Centipede Cocktail table game has no power
« Reply #73 on: February 10, 2020, 08:21:41 am »
If you have power to the 3 pin monitor plug then it is time to follow that power to where is stops on the monitor chassis. Hopefully it is a fuse. I will check my monitor schematic when I get off work today.

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Re: Atari Centipede Cocktail table game has no power
« Reply #74 on: February 10, 2020, 08:33:01 am »
Maybe I missed it along the way...
Is EVERYTHING dead? or just the monitor? 

Just to catch up - is Anything working?  or is the entire machine a brick.
Is the power LED on on the PCB?
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Re: Atari Centipede Cocktail table game has no power
« Reply #75 on: February 10, 2020, 08:39:46 am »
You are getting power at the coin door. Are you saying that the coin reject lights are dead?

If so, are the bulbs blown?

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Re: Atari Centipede Cocktail table game has no power
« Reply #76 on: February 11, 2020, 06:49:54 am »
Good morning all, I wanted to start this morning by answering all the above questions. regarding bperkins01's concerns, I started checking all the ground connections for continuity. I started from pin 4,5 on the p.s.(J5) connector. There is ground continuity at that point. I checked all these ground locations by clipping a 2 foot jumper cable to the p.s. chassis and connecting the meter to the other end of the jumper. I also pulled out the Regulator Audio PCB and checked the P10 plug and P6 plug. Both grounds at those locations are good. The interlock ground is good as is the ground at the Dual Coin Mechanism. I also didn't want to assume that the ground connection from the wall Receptacle was good so I checked that out as well. Then at connector J4 (from the AC outlet) I put my volt meter across pins 2,1 (Ground and black) to verify that I was getting a voltage, which I was. So It appears that all grounds so far are all good. I couldn't find the ground at the PCB board (J20), but I'll look again tonight. Speaking of the PCB board that LED light is not lit. So it does appear that everything is dead including the monitor. I am getting power at the coin door (6.3 VAC across pins 10,11). But no lights. So I took the coin mechanism out of the chassis and checked the bulbs. One was blown and the other one was questionable. So I went on Amazon and ordered a pack of those 6.3v .25a mini indicator bulbs. While I had the coin mechanism out I also checked the two mini switches. Those were working fine as well. I reassembled everything and scratched my head some more.  :dunno I'll continue checking voltages at the regulator and see If I can find that ground connection at J20.

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Re: Atari Centipede Cocktail table game has no power
« Reply #77 on: February 11, 2020, 07:38:32 am »
If you have power to the 3 pin monitor plug then it is time to follow that power to where is stops on the monitor chassis.

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Re: Atari Centipede Cocktail table game has no power
« Reply #78 on: February 11, 2020, 07:52:23 am »
Hmm.
On the PCB there are a number of test points:
+5v  <- Most important one  if you don't have this - that is why the PCB is dead
-5v
+15v
-15v
+22v (unregulated - it will likely be 22-24v range)
-22v (same)
-30V

If you have no LED on the PCB - see if anything is getting to it at all by checking these test points.

On the ARII there are a similar set
-5v
+12v
+10.3v  (Unregulated)
+22v UR
-22v UR

36v AC  (this one is trickier - you have to use both probes on both 36v connections and your meter on AC)

The 2N3055 bottlecap transistor in the center of the large heatsink is a known troublemaker and creates all the power.  If your voltage test points on the ARII are all screwed up.  It's likely that.

I literally did all of this last night on my machine (Centipede upright)
The -5v Voltage regulator on my ARII was dead (Had one of those and replaced it - except I'm not certain it actually does anything  I just found it - its part of the audio circuit.  The very first time I played it the volume did a few weird things after the game warmed up..  So maybe that's fixed too.)

The +15V regulator was dead on my PCB - It is part of the high score retention circuit. Waiting for one of those to come, and I had issues with it..

You've checked the power brick - next layer on the voltage front is ARII - then test points on the PCB.. 
Coin door lighting comes of the ARII - not the PCB

Finally - what MikeA said - if you are getting nothing to the monitor - need to test voltage into it and check the fuse..  The CRT is pretty much a stand alone circuit.

Keep digging...




« Last Edit: February 11, 2020, 08:27:39 am by bperkins01 »
My Arcade Cabinet Build and other projects here:
Centipede, Joust, Joust Cocktail, Asteroids, Galaga, Ms. Pacman Cabaret, Defender, Space Invaders Cocktail
https://bperkins.wordpress.com/

Mike A

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Re: Atari Centipede Cocktail table game has no power
« Reply #79 on: February 11, 2020, 08:02:40 am »
Can you snap some pics of the PCB? Both sides. Especially the edge connector.