wolfeel
Well-known member
***SOLVED - D110 reversed and R261 wrong value***
Awhile ago I built a couple Omega Race boards using KLOVer douglasgb's brand new boards. The first one I built worked 100% out of the gate. The next one I built is having an issue. Both boards have sockets for every IC which has been a help for testing chips as I can swap suspected chips on the known working board to verify if they work or not. Obviously I could have an issue with a socket on the faulty board, but I am going to assume they were installed correctly... at least for now.
The monitor is a known working monitor. Spot killer is off. Game plays.
IC Chips that I have tested by swapping to the known working board:
Both TL082 and both TL081, both 4016 in X&Y area, both 561J, both 74LS374 in X&Y, 74LS157 in column 4 from A to F, 74LS191 in column 3 from A to F, ICs in column 6 from D to M, column 2 from A to E, column 1 from A to D, IC at F8 and E8, IC at 9H, 9J and 9K.
Attached is a video of the faulty board while in test mode (sound board not attached). When in game mode I can play the game and hear that everything works.
Any advise as to where I can zero in at would be appreciated. Thanks!
Awhile ago I built a couple Omega Race boards using KLOVer douglasgb's brand new boards. The first one I built worked 100% out of the gate. The next one I built is having an issue. Both boards have sockets for every IC which has been a help for testing chips as I can swap suspected chips on the known working board to verify if they work or not. Obviously I could have an issue with a socket on the faulty board, but I am going to assume they were installed correctly... at least for now.
The monitor is a known working monitor. Spot killer is off. Game plays.
IC Chips that I have tested by swapping to the known working board:
Both TL082 and both TL081, both 4016 in X&Y area, both 561J, both 74LS374 in X&Y, 74LS157 in column 4 from A to F, 74LS191 in column 3 from A to F, ICs in column 6 from D to M, column 2 from A to E, column 1 from A to D, IC at F8 and E8, IC at 9H, 9J and 9K.
Attached is a video of the faulty board while in test mode (sound board not attached). When in game mode I can play the game and hear that everything works.
Any advise as to where I can zero in at would be appreciated. Thanks!
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