MVS MV-1A Board help
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gizmodrake:
Hi guy's, I have been reparing Jamma boards few months now as a hobby and I have come across my first faulty MV-1A board. The fault code I'm getting is this:
COLOUR RAM BANK0 ERROR
ADDRESS WRITE READ
00400000 5555 B255
Is this a LSPC IC fault? I am unable to find an LSPC IC on my board unless some of the writing has worn off.
I really appriciate your help!
Many thanks, Gavin
gizmodrake:
Ok I have now checked the board over and it looks as though it may be missing a surface mount cap that looks like it may have been knocked off the board. Is this the likely cause of the problem?
nightmaretony:
Nope, one of your color pallete RAMs died out and has random data in it. There are 6 surface mount 65256. The pallete RAM is 6264 RAMs. One of them has bade enables, most likely. Look for corrsion to them.
The LSPC: Line Sprite Picture Creator is the main grapics chip, usually LSPC-A0 for the earlier chipset. A1 or A2 wou,d be that int he later revisions.
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