Working on a basket case Party Zone.
Issue is on the driver board. Game tested with known good board and coil works fine.
Problem: Locked on coil. DJ kickout. Manual says Q76 which is a TIP36c.
I have replaced:
Other resistors associated with this solenoid were tested and within range.
After replacing above, coil still locked on...
From my research, next inline is U5 74LS374. Cut out old U5 and put in socket(buzzed out all my traces). New 74LS374 installed and coil still locked on.
All three transistors still test good. Even pulled from board and tested.