Help with troubleshooting a faulty DMD board

[newdos]

Hi Guys looking for help with the DMD board that has gone duff in my Fish Tales since the play expo (was starting to show signs of issues there then). See video below and if anyone can point me at the components to change I will happily do so. I have ordered a new board anyway but would like to get this working as a spare

http://youtu.be/nQy3demlOtg

Cheers in advance

Kev

 

[Carl Spiby]

Can you see enough to do a display controller ram test in the service menu?

 

[newdos]

yes carl and it passes fine - thinking its more the HV stuff on the board but need to know what exactly rather than just change everything

 

[Carl Spiby]

I assume you've tried your DMD controller from WH20 to ensure its that rather than the DMD?

 

[newdos]

I assume you've tried your DMD controller from WH20 to ensure its that rather than the DMD?

sure have sir!!!! deffo the board

 

[Carl Spiby]

What do the voltages look like (will help to identify which components are shot).

 

[Poibug]

http://www.pinwiki.com/wiki/index.php?title=Williams_WPC#Testing_DMD_Controller_Power

 

[Paul]

Just ping @pinballmania - Andy should have a full set of parts he can supply at a good price From memory it's only around a half a dozen components...

 

[pinballmania]

That doesn't look like a power supply problem. Looks like a data problem as the image sync is out.

 

[newdos]

That doesn't look like a power supply problem. Looks like a data problem as the image sync is out.

pointers for testing Andy - works fine with another board in so I guess that rules out cables bad connections etc ????

Cheers Kev