I cannot get a reading from the Gen2 MCU for its detent to limit switch test.It comes with this plus a neat detent on/off pulse width test. I adjusted the detents until I am getting roughly 25ms on/off. This seems to have no effect on selection. I sat down, again, with schematic and my trusty Fluke meter and started tracing out the detent and limit switch circuits. They check good on the mech so I started checking continuity through the mechanism cable to the PCC where it goes to plug J3108. Pins 5 and 10 are basically a loop through the mech limit and detents and back to the PCC.The MCU depends on these two wires to count ( the count consisting of on/off pulses) and thus tell it where the mechanism is. I pulled those pins and soldered the crimp to the wire in case of a loose crimp. I did the same for pin 1-ground, pin 3 12v, and pin 4 the clock generator. I will look into this clock generator more later. How did I get good at Seeburgs? Doing stuff like this for 30 years. Comes a problem, no one to turn it over to so I fix it or junk it. I’ll choose fix please.

The weatherstripping arrived from good old Amazon and I installed it on the upper and front inner trim rail pieces. The doors shut against these. I noticed a “bumping” when lowering the lid and slowly traced it to the right horn speaker hitting the gas spring.Further investigation revealed that the mounting for the horn was bent, canting the horn toward the gas spring and hitting it. I took it all apart and straightened the mounting tabs. Seeburg (or Stern) used a different horn speaker in this model neccessitating a different mounting. These speakers look for all the world like they came out of an automobile. They sound good though.

Problems are rearing their ugly heads on the SMC2 with the computers. A big part of troubleshooting is to get a repeatable problem that can then be traced. And that is the problem. One day they work great, the next they don’t.In the middle of testing the mech suddenly started tripping as soon as it picked up a record. I sit with schematic and meter and start tracing the trip circuit. Changing out one MCU with the other I discover that one of the plugs was not squarely seated. Replugging solved the trip problem. After of course changing out the PCC’s as well. So after almost two hours of this I had enough SMC2 for one day.

Evening work consists of recapping an HFMA2 amp and TSR6 receiver.