R-TYPE LEO PCB Sprites are missing

RuffNEC · Post by **RuffNEC** » Sat Jan 24, 2009 5:06 pm

I have bought an R-TYPE LEO PCB.

I gave it a test when I unpacked it and everything worked great. The second time I hooked up the pcb on my supergun the sprites were missing. Just the background grafix are displaying...

has this something to do with a connectivity lack between the first and second pcb of the M92 board ? It's an original japanese board from Irem

Stefan_L · Post by **Stefan_L** » Sat Jan 24, 2009 5:41 pm

Are you sure the "J3" jumper is in "B" position?

sven666 · Post by **sven666** » Sat Jan 24, 2009 6:18 pm

sounds like the jumper is missing yeah.

RuffNEC · Post by **RuffNEC** » Sat Jan 24, 2009 6:23 pm

Its in position 2+3

I just pulled the screws a little harder and now the sprites are on like before. I think its just a matter of contact between the two boards

dpful · Post by **dpful** » Sat Jan 24, 2009 7:28 pm

Yeah, connection between two boards. If you seperate and reconect a few times it might clean it a bit. Also, I think there's a square socketed chip on that board? I've had that become a little touchy.

robivy64 · Post by **robivy64** » Sat Jan 24, 2009 10:21 pm

Irem M92 boards can experience this, especially if the top (logic) board is warped in any way.

I bought Gunforce II a few years ago, and the top board was warped and I experienced the missing graphics or failed ROM check occasionally.

I purchased a mint Gunforce 1 for $20 and swapped the top boards. Since the top board wasn't warped, I never had the problem again.

Yes, they are interchangeable.