Centipede g07 repair kit installed - no life in monitor

mchay

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Centipede g07 repair kit installed - no life in monitor

Hey,

A couple of months ago, I bought a Centipede upright well knowing it had monitor problems.

When I received it and turned it on, I could se white/green/red flicker on the monitor and heard a crackling noise comming from the monitor. Therefore I bought and installed a g07 repair kit from Bob Roberts, hoping it could solve some of the problems the machine had.

But now nothing comes on the monitor, when I turn the machine on. The fuses are still okay, and I'm measuring 130v to the monitor. Does anyone have a detailed description on where to measure voltages between, to look into what is failing at the moment on the monitor? I double checked my soldering job and it doesnt look like there should be any cold soldering or other mistakes - but it doesnt seem like there is any juice going in to the tube.


Another thing is, when I put the game into test mode, a continuous beep sequence starts, and only stops when I turn testmode off again. I have the Centipede manual and can't seem to find this mentioned anywhere.
 
It was the Bob Roberts Deluxe repair kit for det g07 monitor capkit, new flyback etc..
 
Hey,
When I received it and turned it on, I could se white/green/red flicker on the monitor

Another thing is, when I put the game into test mode, a continuous beep sequence starts, and only stops when I turn testmode off again. I have the Centipede manual and can't seem to find this mentioned anywhere.

Sounds like it's failing the RAM test.
Is there a particular number of beeps ? Like ten beeps, pause, ten beeps, pause, ten beeps, etc.

Does the game play "blind" at all ?
Can you coin it up and hear a game play, fire, die, etc ?
 
Another thing is, when I put the game into test mode, a continuous beep sequence starts, and only stops when I turn testmode off again. I have the Centipede manual and can't seem to find this mentioned anywhere.

Page 16 of this Centipede manual explains the beeps:

http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede_TM-182_6th_Printing.pdf

I think it is also explained on the back door sheet stapled to the back door of your machine.

The beeps mean the gameboard has one or more bad RAM chips and is unable to display a picture so there is no video going to the monitor. You are going to have to correct this problem first before the board can send any video to the monitor.

Here's a quick test you can do: unplug the power cord to the monitor and flip your self test switch into test mode. Still beeping? Then you have a gameboard problem that must be fixed first. Probably your monitor is ok.
 
No specific number of beeps - it just goes on.

The only things that come on is the lights in the coindoor and the marquee.
 
Page 16 of this Centipede manual explains the beeps:

http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede_TM-182_6th_Printing.pdf

I think it is also explained on the back door sheet stapled to the back door of your machine.

The beeps mean the gameboard has one or more bad RAM chips and is unable to display a picture so there is no video going to the monitor. You are going to have to correct this problem first before the board can send any video to the monitor.

Here's a quick test you can do: unplug the power cord to the monitor and flip your self test switch into test mode. Still beeping? Then you have a gameboard problem that must be fixed first. Probably your monitor is ok.

The monitor has no neck glow either - so I think there's still a problem with the monitor. But I will look at the flowchart to try to solve this problem.
 
Sounds like your game isn't even booting up.
I'd ignore the monitor for the moment and backtrack until you get the game itself to run. (whether you can see it or not)
Power supply, ARII board, edge connector, etc.
 
I started with measuring on the ARII board, and got following values - that doesn't look too good.

+36VAC = 19,3V

-22V = -26V

-5V = -1V

+12V = 12V

+10,3V = 14,2V


Anyone with a good idea to where to go from here?
 
I forgot to mention that these measurements where taken without monitor and pcb connected.
 
You should take your measurements from the PCB, there are test points on it. The only one that looks off to me is the 36VAC, are you sure you measured it right?
 
You should take your measurements from the PCB, there are test points on it. The only one that looks off to me is the 36VAC, are you sure you measured it right?

I measured from ground and the relevant points on the ARII board. I will go measure from the PCB and report back with my discoveries.
 
So, I connected the PCB and got the following measurements:

+5V = 5V

-22V = -26V

+22V = 25,7V

+15V = 15,15V

-30V = -27V

-5V = 0,578V

+12V = 11,98V

-15V = -15,27V
 
No, I haven't rebuild it - maybe it would be the solution to the problem. A rebuild kit for the ARII and the powersupply also?
 
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