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Archived from groups: rec.games.video.arcade.collecting (More info?)
Hey all.
I'm working on a Blue Amplifone HV board. When I got it the board was dead
and was missing the transformer at T1 as well as the resistor at R13. I
don't have the Wintron installation instructions and its been about 4 years
since I've had to put one of these things on a board so I don't recall if
those parts were removed as part of the install or if they were just
missing.
After putting them back, I pulled them off of a beige board, and doing the
upgrades to the blue board (5 watt 50 ohm resistors and the diodes on the
outputs of the regulators) I now get HV but everything is white and there
are "drawback" lines everywhere. It really looks like the screen control is
up to high but its all the way down. I can swing the HV from 12k to 19k with
the frequency pot.
I've seen this before on a GO8 but it had something to do with the heater
voltage. I don't think that's the case here.
Any insight would be great. I'm sure I can get this if I fart around with it
some more but other ideas are always a help!
Hey all.
I'm working on a Blue Amplifone HV board. When I got it the board was dead
and was missing the transformer at T1 as well as the resistor at R13. I
don't have the Wintron installation instructions and its been about 4 years
since I've had to put one of these things on a board so I don't recall if
those parts were removed as part of the install or if they were just
missing.
After putting them back, I pulled them off of a beige board, and doing the
upgrades to the blue board (5 watt 50 ohm resistors and the diodes on the
outputs of the regulators) I now get HV but everything is white and there
are "drawback" lines everywhere. It really looks like the screen control is
up to high but its all the way down. I can swing the HV from 12k to 19k with
the frequency pot.
I've seen this before on a GO8 but it had something to do with the heater
voltage. I don't think that's the case here.
Any insight would be great. I'm sure I can get this if I fart around with it
some more but other ideas are always a help!