wildwest3163
Active member
Got a Buck Rogers Ive been working on, multiple coils were disconnected and jumpered, ect. Friend of mine picked this game up, had the driver board repaired, put it in and it did nothing except light up. Thats when he passed it along to me (after looking at the bottom of the playfield and seeing the wiring mess)
progress to date. Got all the jumpers removed, Ohmed all the coils and reconnected the wires, checked/reconnected loose coil diodes.
Now for the fun part. Installed a known good driver, turned on the game, immediately (under a second from flipping the switch) blew a transister. Tracked that transister to Soloniod 6 (kickout hole on Buck Rogers). Soloniod tests good. I disconnect that soloniod, turn game back on, tilt soloniod is locked on. Turn off, disconnect tilt soloniod, check slam switches and coin switch, turn game back on, still nothing.
Game has a new power supply installed, already had a Ni-wumpf mpu in it when I got it. It doesnt have any of the ground mods done to it (yet), Im getting ready to repin all the connectors.
My question is what is frying the transisters? What am I missing? When I replace the Transister is there anything else on the board I need to replace?
progress to date. Got all the jumpers removed, Ohmed all the coils and reconnected the wires, checked/reconnected loose coil diodes.
Now for the fun part. Installed a known good driver, turned on the game, immediately (under a second from flipping the switch) blew a transister. Tracked that transister to Soloniod 6 (kickout hole on Buck Rogers). Soloniod tests good. I disconnect that soloniod, turn game back on, tilt soloniod is locked on. Turn off, disconnect tilt soloniod, check slam switches and coin switch, turn game back on, still nothing.
Game has a new power supply installed, already had a Ni-wumpf mpu in it when I got it. It doesnt have any of the ground mods done to it (yet), Im getting ready to repin all the connectors.
My question is what is frying the transisters? What am I missing? When I replace the Transister is there anything else on the board I need to replace?