CMOS Logic: CD4514Bs are cheap. If you suspect it; replace it. What's $0.65 toward your sanity?
SOLUTION!
Damndest thing I have ever seen. Decided to go back over my work, feeling really paranoid something was not making sense. Got the meter out and checked continuity between transistor Q60 and the points it goes off too.
C goes to ground, G goes to resistor R60 and then U4, A goes to pin 3. All have perfect continuity.
And yet when I reinstalled board and grounded "A" pin on the transistor I have no light. This makes no sense at all since if I ground at the connector, pin 3, the light turns on! The trace on the board is perfect, this makes no sense. So I flip the board over and happen to look close at the pin and see it is covered with some reddish substance! The whole pin is covered! And I was checking continuity from the back of the board!
I clean pin 3 off and re-tinned it and pulled apart the connector too and cleaned that end and everything is working perfect. The only thing I can think off the pin got hot enough from the short it melted the plastic of the connector which looks the same color and it flowed around the pin.
Lesson learned!!
Quoted from Quench:Nice!
What's your plan with this game? Is it a keeper or are you selling it?
Plan is as always to put game in line up and see which one gets played the least. I like the game, it has fast play so we shall see. Games that get played the least get rotated out.
It is rare I pick up one "to sell" as my time is limited, too much to do at home and work. As I get older try to find titles that I think we will like. Star Trek is a good theme. Still have to clean and touch up playfield, which I'll do in another week or two, I have to finish painting Hearts and Spades.
Again thank you for your help! Maybe in a month or two I'll take up old sound board and we can repair.
Gary
In that case, PM me your email address. I have a little surprise that may help the games interest last a little longer.
Just a general update, not directly sound related but I don't have a repair thread going. Pulled apart the 3 connectors at the rectifier board and made sure all contacts were clean and had proper tension. Replaced the high load lines contacts with with heavy duty Trifurcon even though it is almost fully LED at this time. Added 10 more 470 ohm resistors to various sockets and converted them to LED. Added auxiliary ground from MPU to solenoid board to ground at transformer. Adjusted one of the flippers that was out of alignment. Tied up the harness in the backbox as it should be from the factory.
Was getting a flickering LED the other day at the 2X at the drop targets, seems to be gone now. Game plays stoutly, still have to detail up the playfield but I'm spitting my time working on another pin.
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