Nichibutsu MagMax graphics issuse
- Thread starter r67055
- Start date
Hammy
Enlightened
This is a bottom board fault i think... check the ribbon cables, (and also check the 4 small rams - 41464 / 2114 i maybe wrong on part number..)
Hammy
Enlightened
Yes, that's the 4 rams, usually the problem.
I can see fuji 161's , check those next
Also check the rom tracks are good from the rom data lines (i think it goes from the roms > 157's maybe)
If the fuji's and tracks are good check the 157's
I can see fuji 161's , check those next
Also check the rom tracks are good from the rom data lines (i think it goes from the roms > 157's maybe)
If the fuji's and tracks are good check the 157's
8 pieces of 74ls157 and I tested it with a tester. no. none of them are at faultYes, that's the 4 rams, usually the problem.
I can see fuji 161's , check those next
Also check the rom tracks are good from the rom data lines (i think it goes from the roms > 157's maybe)
If the fuji's and tracks are good check the 157's
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Hammy
Enlightened
Nice one! Now check those fuji's 161's and 257's..
Now i see them it's probably the 257's
Now i see them it's probably the 257's
the 2 pieces are 257 and good. I continue tomorrowNice one! Now check those fuji's 161's and 257's..
Now i see them it's probably the 257's
I tested 12pcs, 161s and they all work
Hammy
Enlightened
Damn, there's those 2x fuji 377 , after this it must be line damaged somewhere / bad contact
one of the 377 is faulty. I replaced it, but it didn't improve
so much has changed that not all stripes are red
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Hammy
Enlightened
Damn, looking better ... keep going through the other fuji's
no unfortunately.
I went through all the fujis and didn't see any errors