Reply to "Reverse board won't go forward, bad transistor or some thing else?"

THis is device is similiar in design to the basic 103 DC reverse unit.

Could be the Tranistors, could be the 6 pin MOC, but they seem pretty hardy and are isolated from a derailment. They do normally use a transistor to turn the MOC on, that may be the 8 pin chip.

If the Power transistors are shorted, I would replace them and the test.

You can test the moc for continuity with a 5 volt test signal, but you will need to lift pins.

This arrangement is on most of lionels AC and DC driver boards in some variation. G