Arcade Collecting > Restorations & repair

Star Wars restoration - AVG board problem

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Level42:
Ah ow, well OK then, high tones it is. I was posting that from my head without looking at the manual. Little chance on 16 bad tones though, so you'd be able to pick out the sound for "bad" easily.

Those beeps are generated by (one of the) pokey's.

The difficulty selection screen stays up 10 seconds (or 15 or so) and then automatically starts at the diff. level that the yoke is nearest to. If your yoke weren't working I guess it would automatically select the medium difficulty and start the game there. You should hear the music starting and you should be able to hear your shots when you fire.

You can swap out boards with a good set, that's a good way of localizing any problems.

What do you mean with "This machine hasn't been touched" ? It's got a WG ! ;) ;) ;)

I don't expect the 6103 to be very different from the 6100 ?

Do you hear any chatter on the yokes at all ?

RayB:

--- Quote from: Level42 on October 12, 2008, 12:24:19 pm ---What do you mean with "This machine hasn't been touched" ? It's got a WG ! ;) ;) ;)
--- End quote ---
Heh, yeah other than that. I meant all the boards are original with no repair tags and all the serial numbers match. I guess it's been touched a lot in other ways, seeing how it has a FireFox yoke.  :P


--- Quote ---I don't expect the 6103 to be very different from the 6100 ?
--- End quote ---
I just read in a 6100 technical/repair manual that 6103 was improved for much better reliability. That's all I know.


--- Quote ---Do you hear any chatter on the yokes at all ?
--- End quote ---
No.

RayB:
Set all the dipswitches to factory defaults today. Tried it blind again, and same thing. Ben's saying on power on, Red 5 saying after coining and pressing a trigger, then nothing. I let it sit a good long time and tried blindly hitting a difficulty Death Star with no luck. (Does the firing on the difficulty screen make shooting sounds? If so, then I'm not getting that either).

Loud hum in speakers. Next pay check I'll place an order with Bob for a bunch of kits and parts.

RayB:
UPDATE:
I tested the board in another cabinet that has a working monitor, and I got all the same symptoms so at least the problem is narrowed down to the board set.

Visual inspection of the AVG board reveals no obvious problems.

The AVG board has test points for X, Y signal, etc... I was wondering if it is possible to measure those using a standard digital multimeter or not? I just want to narrow down if the problem is with the board itself or if it's maybe with the connector mini-board that links the 3 main boards together.

Level42:
So you didn't have a picture on that other cab either ?
And normally the monitor works on that one ?

You can swap PCB's between each-other to locate if the problem is on one of the 3 PCB's  with the other (working) PCB set.  Are you positive that the end-board that connects all three boards is correctly set-up. (check with the working board-set) ?

A multi-meter won't show much because the signals are too fast for a DVM. If you have a 2 channel scope you can see the complete game (like I showed on my YouTube video).

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