Quoted from Peruman:when ball 1 goes into the outhole and the "P" switch closes, the player unit does not advance.
You don't necessarily jump the switches one at a time.
Inspect and diagnose this circuit with Alligator clip jumper wires
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features