The left/right movement on my t-rex hasn't worked since I acquired this game awhile ago. The up/down and ball eating work fine so I've just never been that motivated to look into it. Since we're pretty house bound I figured why not see if I can crack it.
All the wiring looks good on the motors. When I go into the t-rex test, when I use the left and right flipper buttons I can hear a relay click and the motor sounds like its running, but there is no movement left and right.
In the research I've done it seems like alot of people have had this problem and the fix is always a little different. The schematics in the manual aren't that great (or I'm dumb which is just as likely) but it looks like Q27 controls the left right movement. I'm wondering if that is just bad since it it sounds like the relay and motor are working in test.
In looking at the switche, the one on the right of the underside of the playfield has this diode wired on....is that correct?
If anyone has any ideas please let me know. Just wanted to see if there was something else I should check out before I pull the mpu and Q27.