I feel like a novice here. I've never had a coil lock on that i haven't been able to fix. Working on a Lethal Weapon 3. Left drop target bank locks on. This coil is associated with mpu/driver and PPB board. Ive narrowed it down to the PPB board. After looking at the schematics I can not find the culprit on the board. Checked all diodes and resistors. Swapped out relay also. On Schematic, it looks like there is no transistor thats related to it on the PPB board. I checked all transistors anyway and the all measure good.
I know its on the PPB board because I swapped it out with another and works fine.
What am I missing on this board? Where could my problem be? Any help is much appreciated.
Thank you in advance