I'm working on repairing one now. Non-working left flipper and no sound. I've isolated the left flipper problem to a bad resistor. I can trigger the flipper by grounding the correct pin on the selector gate IC, and jumpering the leads of the resistor does the same.
I'll try a new speaker before trying to trace that issue, and see if that works.
thegamezmaster, on Sat Mar 10, 2012 10:48 AM, said:
Just got mine slowly back to life. Great little machine. Still have a problem with static sound through TV. Any thoughts on how to repair? Also in breakout the paddle has lines coming off it, fix? Thanks.
If the game chip is socketed (as mine is), CAREFULLY remove the game chip and spray some electronic cleaner into the socket. Take an eraser and CAREFULLY clean the pins on the chip, then replace it in the socket and see if that fixes your Breakout paddle lines problem. Regardless of if it does or not, I'd go ahead and replace the socket anyway (this is on my to-do list as well), but the procedure I outlined is one way to attempt to isolate the problem.
Official Ninja, on Fri Feb 24, 2012 11:14 AM, said:
After fixing this unit it worked for a few days and I was enjoying it. Played it a lot. Then,suddenly, it broke. It thinks the button for the right flipper is being held. I checked continuity and there is no short. The trace runs to a small chip under the metal shield. I can only assume that chip must have gone bad.
The chip is a Quad And-Or Select Gate, and is most likely quite easy to find (or, at least, a equivalent can be cross-referenced). Check the resistor(s) along that circuit as well. You're probably right and one of the lines on the chip is stuck, but it's possible that a resistor could be causing this stuck signal.
The data sheet for the chip is here: http://doc.chipfind..../scl4019be.html
Gotta love old electronics. Easy to work on, as long as the chips aren't custom.
Edited by Brian D. Deuel, Mon Apr 9, 2012 10:37 PM.