I've been repairing this Asteroids board on and off for the past year.
The image currently has wavy lines.
The first thing that I noticed when I got the board was 3 transistors (at K10) were the wrong type. I had some NOS so replaced them.
I broke a couple of legs from two IC's when I was cleaning them. They were pretty brittle. I fixed them.
Asteroids Deluxe works fine in my test machine. This board however shows traces in addition to the wavy lines. Even turning down the brightness all the way down doesn't help.
I researched here a bit but couldn't find what DAC means.
Anyway, as I'm taking pictures I could see the image scrolling vertically though the camera's screen. I plugged in Asteroids Deluxe just to make sure and it has no scrolling.
So back on the work bench I started looking at anything wrong near and around the X Y section of the board. All I can see is corrosion on the clock at A12 (940 TL082CP). I'm wondering if that be the problem.
Any ideas?
The image currently has wavy lines.
The first thing that I noticed when I got the board was 3 transistors (at K10) were the wrong type. I had some NOS so replaced them.
I broke a couple of legs from two IC's when I was cleaning them. They were pretty brittle. I fixed them.
Asteroids Deluxe works fine in my test machine. This board however shows traces in addition to the wavy lines. Even turning down the brightness all the way down doesn't help.
I researched here a bit but couldn't find what DAC means.
Anyway, as I'm taking pictures I could see the image scrolling vertically though the camera's screen. I plugged in Asteroids Deluxe just to make sure and it has no scrolling.
So back on the work bench I started looking at anything wrong near and around the X Y section of the board. All I can see is corrosion on the clock at A12 (940 TL082CP). I'm wondering if that be the problem.
Any ideas?
