I am working on getting an Asteroids cabinet working well. One thing I've got is a good humming noise from the speaker. Seems tied to the vector monitor chatter in that the humming pitch changes as the chatter from the vector monitor changes. I'm very new to arcade game repair, so not sure where to go.
So far, I installed a recap kit from arcadeshop, but it didn't seem to make any difference.
I tried disconnecting the power feed to the flourescent light fixture but that didn't make a difference.
I tested the 5v pin on the AR1 board, and it had 5.26 volts, which seems OK, but not sure.
I've replaced the Big Blue capacitor, as I have a good hum from the power supply, but that didn't change the power supply hum nor the speaker hum.
When I turn on the machine, there is a tiny bit of crackling from the speaker, but it doesn't last once the machine boots.
The volume knob seems to be all the way down, but it still has a good bit of loudness.
The game plays and seems to sound fine, and you don't really notice the hum while playing.
I've checked forums, but can't find any posts with the exact problem... more games seem to have the AR2 board.
What else should I be checking?
So far, I installed a recap kit from arcadeshop, but it didn't seem to make any difference.
I tried disconnecting the power feed to the flourescent light fixture but that didn't make a difference.
I tested the 5v pin on the AR1 board, and it had 5.26 volts, which seems OK, but not sure.
I've replaced the Big Blue capacitor, as I have a good hum from the power supply, but that didn't change the power supply hum nor the speaker hum.
When I turn on the machine, there is a tiny bit of crackling from the speaker, but it doesn't last once the machine boots.
The volume knob seems to be all the way down, but it still has a good bit of loudness.
The game plays and seems to sound fine, and you don't really notice the hum while playing.
I've checked forums, but can't find any posts with the exact problem... more games seem to have the AR2 board.
What else should I be checking?

