Centipede Wont Boot

[msignor]

Hey guys - Small update here.. I sent my original PCB out to be repaired, and picked up a working CP board from one of the guys here on the forum.

I put in the new board, only to be greeted with almost the same behavior as the original board I had. No popping noise, I actually hear some game noises after a while and see garbage on the screen in test mode after a few minutes too. Does not coin up, the 1P and 2P lights are lit.. and thats it. I hear and endless set of beeps that keeps looping it seems like, cant get a real count about anything.. or if its beeps, garbage, or what..

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Does this sound like an AR2 issue or big blue issue at this point? I have a big blue to replace, but need to order an AR2 kit..

Do you think I damaged the new board I got? Voltages are still good on 5 and 12.. +/-22 is still out of wack a little.

I wanted to get this working before I tried my newly repaired board when it comes.... seems I have uncovered yet some more issues.

 

[kb0jjn]

Hey guys - Small update here.. I sent my original PCB out to be repaired, and picked up a working CP board from one of the guys here on the forum.

I put in the new board, only to be greeted with almost the same behavior as the original board I had. No popping noise, I actually hear some game noises after a while and see garbage on the screen in test mode after a few minutes too. Does not coin up, the 1P and 2P lights are lit.. and thats it. I hear and endless set of beeps that keeps looping it seems like, cant get a real count about anything.. or if its beeps, garbage, or what..

---

Does this sound like an AR2 issue or big blue issue at this point? I have a big blue to replace, but need to order an AR2 kit..

Do you think I damaged the new board I got? Voltages are still good on 5 and 12.. +/-22 is still out of wack a little.

I wanted to get this working before I tried my newly repaired board when it comes.... seems I have uncovered yet some more issues.

If it will not coin up>> Check all wiring and grounds.
the board should be fine as long as your +5 voltage is good.

 

[msignor]

Well... replaced the big blue last night and all i saw was garbage on the screen. Did fix my humming / flickering monitor issue though.. I powered off, made sure everything was plugged in and noticed I had never adjusted the POT on the ARII back to the original center position. :-( Originally I had to adjust the pot from 4.6 to 5v. so I am hoping I didn't fry something with 5.3v

I put it to center, powered up and confirmed I have 4.97 on 5v but now there is no action happening on the screen at all.. so it appears as if I have taken a step backwards.

I should have the AR2 rebuild kit on friday so we will see.. not sure where to go from there except for another board.

 

[RedlandMan]

5.3 should not hurt it. I would wait for your repaired board to come back.

 

[msignor]

So...I am trying to test my ARII before I actually go through the rebuild... want to make 100% sure ya know?

Is it true I need to have the PCB connected for me to measure the 36v?

Additionally, I am getting 14.5 on my 10.3 unregulated with the PCB unplugged, normal? 12v and 5v are spot on.

 

[msignor]

Just wanted to close this out for the other new people.

Some notes for my next ARII rebuild since I was OCD-ing about this for a few days-- 10.3 is unregulated so 14v is OK. Also 22v is unregulated so 24v - 25v is ok. as long as 5v and 12v are stable all is good.

OH! :: sigh.. :: when measuring 36v yes it is supposed to read 1/2 but switch the DMM to AC!!

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I had sent my original PCB to Talon 2000 for repair and he did a top notch job. There was a short in either transistor q2 or 3 (never confirmed which and didn't look) which was causing my Watchdog to constantly trip. Would explain why when I probed the CPU, it went low hi low

On the second board I got - Concluded that it was most likely damaged in transit but the seller was a great guy and offered me a refund.

All in all, she lives.

 

[RedlandMan]

Nice to know its finally working