Zero wing video and/or object ram error-solution

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rugdoctor
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Zero wing video and/or object ram error-solution

Postby rugdoctor » July 17th, 2015, 1:12 pm

The original Toaplan board was booting up with fore mentioned errors and garbled graphics. Sometimes gameplay will run and sound right but graphics was messed up. I reflowed the custom chip next to the dipswitches and also the smaller chip following it and problem gone.

..
image.jpg


image.jpg


TGIF

:awe:
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RMRM
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Re: Zero wing video and/or object ram error-solution

Postby RMRM » July 17th, 2015, 6:10 pm

Great!

:slowclap:
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Stompp
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Re: Zero wing video and/or object ram error-solution

Postby Stompp » July 17th, 2015, 7:01 pm

I know how much time you put into that. Great work :thumbup:
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rugdoctor
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Re: Zero wing video and/or object ram error-solution

Postby rugdoctor » July 17th, 2015, 8:35 pm

Really apprehensive in doing smd reflow at first but was a walk in the park after I took some beta blockers 8-)
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rugdoctor
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Re: Zero wing video and/or object ram error-solution

Postby rugdoctor » July 17th, 2015, 11:54 pm

Just a more details on fix:

I received the board as part of my haul and it booted up with proper game-play and music, however, the graphics were wrong or missing. Rather than tossing it aside and moving to the next board, I decided to troubleshoot it. When the board is placed on the vertical orientation, the game will not boot and instead comes up with a "object ram error" or sometimes "video ram error". I firstly checked the pins on solder side of the board to make sure nothing is touching together and manage to find a couple of dry solder joints which I touched up.

Still getting the error after the initial touch ups so I proceeded to look at the custom chips. Nothing looked out of the ordinary, but I notice that a slight pressure on two of the chips yielded perfect graphics and game-play. This lead me to up-skill in the smd way of soldering specifically re-flowing those damn custom chips.

These are the two troublesome chips:

1. The BCU-2 and
2. the custom chip on the "F" position of the board.

Image

So I proceeded to re-flow them with great success! As I was greeted with perfect gameplay.

Image

I finally cleaned up the residual lacquer and sprayed on a new coat to extend the life of the board.

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