Following “Repairing Williams System 11 Pinball Part 3”, I was doing the Switch Levels Test and am looking for a little advice.
On the first part of the test with a clip lead connected to 1J10 pin 9 and the other end of the lead with a 4N4004 diode connected to it I touched each of the pins on 1J8 and get the following read outs
P1 Plumb Tilt 06 01
P2 Playfield Tilt 06 09
P3 Ferris Wheel 06 17
P4 Shooter Lane o6 25
P5 not used 06 33
P6 key
P7 M Wheel H opto 06 41
P8 not used. 06. 49
P9 Left Flipper 06 57
Now doing part two of the test. Test lead clip on 1J8 pin1, then touching each pin on 1J10 I get no reading on the Display other than Switch Levels Test 06.
So witch readings should I be getting? Do I have a cpu issue? Any advice and guidance is appreciated.
Kickout