Hi all,
I recently got a Major Title pcb however it was faulty!
Which was good as I've not been well recently and needed something to
focus on. The pcb arrived on Monday 2nd Feb and I had time to get straight on it!
1st plug in gave out a ram problem.
That was the pcb saying which rams are bad and also the Major Title logo was messed up and over too the left.
I looked online for the schematics and couldn't find any
so I looked for repair logs and one on Aussie Arcade by IG/VG sort of
matched so I piggybacked a ram and the logo appeared back where it
should and one of the red '1' had gone back to a '0'... result I removed
it and socketed in another 6116...
I
was getting somewhere... This then led me to piggybacking ram to see if
any difference occurred. Not much happened then I realised the ram
maybe working in pairs so tried piggybacking multiple rams. Slowly I started getting somewhere.... (and forgot to take pics of the roms!)
Anyway....
After a total of 7 6116 rams changed (thank you sf2 boot pcbs!)
Enjoyed that one
now to rtype it....
- Ben
P.S.
I think I am right with the 6116 ram being tied in lots of 2 and also
it seems to like 2 of the exact same (I did try the same speed marked
but it didn't like it so had to change both!)
P.P.S. Not sure why it had 3 faulty ram chips reported and I had to change 4 locations overall
I recently got a Major Title pcb however it was faulty!
Which was good as I've not been well recently and needed something to
focus on. The pcb arrived on Monday 2nd Feb and I had time to get straight on it!
1st plug in gave out a ram problem.
That was the pcb saying which rams are bad and also the Major Title logo was messed up and over too the left.
I looked online for the schematics and couldn't find any
so I looked for repair logs and one on Aussie Arcade by IG/VG sort of
matched so I piggybacked a ram and the logo appeared back where it
should and one of the red '1' had gone back to a '0'... result I removed
it and socketed in another 6116...
I
was getting somewhere... This then led me to piggybacking ram to see if
any difference occurred. Not much happened then I realised the ram
maybe working in pairs so tried piggybacking multiple rams. Slowly I started getting somewhere.... (and forgot to take pics of the roms!)
Anyway....
After a total of 7 6116 rams changed (thank you sf2 boot pcbs!)
Enjoyed that one
- Ben
P.S.
I think I am right with the 6116 ram being tied in lots of 2 and also
it seems to like 2 of the exact same (I did try the same speed marked
but it didn't like it so had to change both!)
P.P.S. Not sure why it had 3 faulty ram chips reported and I had to change 4 locations overall