The following is a simple test of the PSX to make sure it is functioing properly.
1) Turn on DCC power to the PSX.
2) Verify D7 and D12 are ON and that D6 is off.
3) Connect a wire from J2-1 to J2-2.
4) Verify D12 is ON, D7 is OFF, and D6 is ON. You may see D12 and D6 pulse OFF periodically (VERY short time), this is the automatic reset.
5) Remove the wire from J2.
6) Verify D7 and D12 are return ON and that D6 turns OFF]