Pimpbot5000
Member
I've been trying to bring this Space Duel board back to life. Initially the self test indicated all the RAM chips were bad, so I replaced those. At that point the self test would pass but would immediately reset without displaying anything on the screen. I replaced the AVG chip with the Biltronix replacement and now the self test passes and displays without resetting. The game will not play in game mode however. The start buttons are lit (not blinking) and the screen is blank (spot killer is on).
One thing I noticed is that self test screen 3 does not display the rectangles it's supposed to. The manual indicates this could be a problem with the scaling circuitry. Looks like I need to check chips C7 and D7...? Any other suggestions are appreciated. Thanks,
Carlos
Self test screen 1
Self test screen 2
Self test screen 3
Self test screen 4
Self test screen 5
One thing I noticed is that self test screen 3 does not display the rectangles it's supposed to. The manual indicates this could be a problem with the scaling circuitry. Looks like I need to check chips C7 and D7...? Any other suggestions are appreciated. Thanks,
Carlos
Self test screen 1
Self test screen 2
Self test screen 3
Self test screen 4
Self test screen 5
