Mars Trek
Segasa-Sonic, 1977You're currently viewing posts by Pinsider HowardR.
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Quoted from sauce504:ball count unit doesn't always advance
If the Ball Count stepup solenoid doesn't get its signal to advance, 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
pasted_image (resized).pngQuoted from Runbikeskilee:the schematic posted on ipdb is pretty poor quality and I am unable to read the appropriate circuit (section E-23)
I agree with 
Runbikeskilee
I'll need to see a high quality scan of the schematic from (for example) Staples ($2) or Kinkos ($6)
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Boulder, CO