kb0jjn
New member
I have a Galaga board that I have been wrestling for about a week now.
I can finally get it to power up and play. I can play it for hours and let it play in attract
mode. I have repaired many of the broken pins on the custom chip and use this board to
test them on. I can flex the board and keeps on going. Fixed right? Wrong, power it down
for about 5 min and all kinds of problems. I get the boom sound and attract sound then
boom sound attract sound over and over. After about 5-10 min. of this I power it off and on
again, it works as before.
I have a laundry list of parts to throw at this damn thing. It is a flakey chip I am shure but which one? All of the chips I have repaired are NOT the problem as I can easy eliminate them in the other working (actually working) board. I am leaning to a 74ls367an chip.
My power supply is at 5.15 vcc and 11.6 on the 12 volt line and I am just using my power connector and heavy barrel video tube.
I have also tried to heat up slightly with a lamp and once it is working/on it will not fail.
ANY thoughts....I hate intermittent problems.....
I can finally get it to power up and play. I can play it for hours and let it play in attract
mode. I have repaired many of the broken pins on the custom chip and use this board to
test them on. I can flex the board and keeps on going. Fixed right? Wrong, power it down
for about 5 min and all kinds of problems. I get the boom sound and attract sound then
boom sound attract sound over and over. After about 5-10 min. of this I power it off and on
again, it works as before.
I have a laundry list of parts to throw at this damn thing. It is a flakey chip I am shure but which one? All of the chips I have repaired are NOT the problem as I can easy eliminate them in the other working (actually working) board. I am leaning to a 74ls367an chip.
My power supply is at 5.15 vcc and 11.6 on the 12 volt line and I am just using my power connector and heavy barrel video tube.
I have also tried to heat up slightly with a lamp and once it is working/on it will not fail.
ANY thoughts....I hate intermittent problems.....

