wwf wrsetlefest sprite problems

[arcadeandy]

 

[arcadeandy]

hi iam having problems with my wwf board its original not a bootleg, cant see any lifted pins on custom chips all traces are ok,not sure where to start? any help would be great thanx guys.

 

[pooman2084]

I always remove and refit any socketed ROM chips for graphics problems before breaking out the test equipment.

 

[arcadeandy]

View attachment 7444View attachment 7448View attachment 7447View attachment 7446View attachment 7445

 

[TheDaddy]

I have repaired a few of these Checked I check in this order :-

1) Check all voltages are correct and the board is getting enough voltage.
2) Check the roms , I would remove , Verify , Clean and refit if good.
3) Check ram (Either remove Test & socket)

I had one with similar issues - Broken image :-



Fixed



SEE BELOW FOR REPAIR NOTES.


I have another 2 or 3 of these to fix at some point,

Hope this helps.

Dave.

P.S I did have one with a bad track as well from ram if I remember correctly.

 

[Lurch666]

From the picture of the PCB it looks like the eproms aren't socketed.
I can see what looks like a 6116 ram chip near the graphics eproms. I would try piggybacking a known good ram on it to see if it makes any difference.

 

[arcadeandy]

I have repaired a few of these Checked I check in this order :-

1) Check all voltages are correct and the board is getting enough voltage.
2) Check the roms , I would remove , Verify , Clean and refit if good.
3) Check ram (Either remove Test & socket)

I had one with similar issues - Broken image :-

View attachment 7454

Fixed

View attachment 7455

My repair notes are not great and rushed as always but here are the notes :-

View attachment 7456

I have another 2 or 3 of these to fix at some point,

Hope this helps.

Dave.

P.S I did have one with a bad track as well from ram if I remember correctly.

thanx for reply! can you remember what fixed your sprite issue? il do some more checks thanx .

 

[TheDaddy]

Sorry i posted wrong fix pic, This had also and audio fault ! lol here is the fix :-





Been a long day already .......

Dave.

 

[arcadeandy]

Sorry i posted wrong fix pic, This had also and audio fault ! lol here is the fix :-

View attachment 7460



Been a long day already .......

Dave.

hey thanx dave il do some more on this when i get chance and report back what i find out.