So I'm 98% certain the CV I am working on is haunted.
Here is the symptom: Bottom right flipper works fine for 1-2 games, then only the HOLD side of the right flipper works, I lose the POWER stroke.
Left flipper works as it should, no issues.
Here is what I have tried so far:
-New coil (yes diodes installed the right way)
-New EOS, resolder all lugs cleanly
-New trifurcon connector on the ground side of flippers (12-pin) - Symptoms seemed to improve every time I reseated the connector, thought this fixed it, but it didn't
-Pulled the board, replaced the big drive transistor 36C and the secondary transistor TIP 102 (pre-transistor tested fine on the board so not removed)
-I also reflowed the solder to all flipper pins (+50V and ground side)
-Re-seated the +50V feed wire on the existing connector.
-Tested flipper buttons on the cabinet, they test fine in test mode, no issues.
Only thing left I can think of is replacing the pre-transistor (which tests fine), and the U8 74LS374 IC. I'm starting to really think the only thing it can be is a failed U8, but do the symptoms make sense?
Previously, this machine had a shorted switch matrix issue which I fixed. +50V flasher in the ringmaster headed shorted out to the switch matrix. Could that have damaged one piece of the U8 on the flipper side?
This is weird where everything meters out fine. I can proved things work, because I can play 2 good games of CV and it plays great......and then I lose the ghost takes away the right flipper.
Also, I metered out the +50V and it is coming in hot at closer to +70V. Are the issues possibly related? Lower left flipper works fine.
Also, the neon light no longer works. I believe this is an unrelated issue, and I will replace the transformer, but thought I would throw it into the mix incase it is related.
Just curious if anyone else has had a "haunted flipper" type issue before, and what fixed it.
Penny for your thoughts.
Here is the symptom: Bottom right flipper works fine for 1-2 games, then only the HOLD side of the right flipper works, I lose the POWER stroke.
Left flipper works as it should, no issues.
Here is what I have tried so far:
-New coil (yes diodes installed the right way)
-New EOS, resolder all lugs cleanly
-New trifurcon connector on the ground side of flippers (12-pin) - Symptoms seemed to improve every time I reseated the connector, thought this fixed it, but it didn't
-Pulled the board, replaced the big drive transistor 36C and the secondary transistor TIP 102 (pre-transistor tested fine on the board so not removed)
-I also reflowed the solder to all flipper pins (+50V and ground side)
-Re-seated the +50V feed wire on the existing connector.
-Tested flipper buttons on the cabinet, they test fine in test mode, no issues.
Only thing left I can think of is replacing the pre-transistor (which tests fine), and the U8 74LS374 IC. I'm starting to really think the only thing it can be is a failed U8, but do the symptoms make sense?
Previously, this machine had a shorted switch matrix issue which I fixed. +50V flasher in the ringmaster headed shorted out to the switch matrix. Could that have damaged one piece of the U8 on the flipper side?
This is weird where everything meters out fine. I can proved things work, because I can play 2 good games of CV and it plays great......and then I lose the ghost takes away the right flipper.
Also, I metered out the +50V and it is coming in hot at closer to +70V. Are the issues possibly related? Lower left flipper works fine.
Also, the neon light no longer works. I believe this is an unrelated issue, and I will replace the transformer, but thought I would throw it into the mix incase it is related.
Just curious if anyone else has had a "haunted flipper" type issue before, and what fixed it.
Penny for your thoughts.
