Barnstable, MA
Just firing up a Pinbot after it was stored for some time. This is what is happens upon startup. The left upper kicker keeps firing. What should I look for?
(Topic ID: 247385)
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Pinbot
Williams, 1986
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Quoted from Cheddar:pull the switch connector on the mpu and try it. This will tell you if it's board or playfield. I suspect it's playfield since this is a controlled eject and not a locked on coil.
Would you know what connector position that is? Sorry, EM guy here.
OK, I ran the diagnostic test and came back with no errors. I ran the complete series of tests as well as the Auto-Burn In. I also unplugged J8 and J10, and placed a jumper across J10-9 & J8-4 and the display showed the left eject position. So I can rule out the CPU I guess.
By looking at the Switch Matrix Table, the J10 Wht/Br is common to 5 other switches. The J8 Grn/Yel is common to 7 switches.
Would one of these switches or diodes affect the left eject kicker?
IMG_4512 (resized).jpgQuoted from Playdium:So with wiring continuity, are the switches wired in series as shown in each row and column?
They are wired in series but they may not be in the same order as listed in the manual. They are wired so the manufacture can save wire.
Test Q48 with dmm set to diode function first, should read between .400- .700, if less than .4 or .400 it's bad, then test the others, the reason I suggest Q48 is because you have an entire row out, Q48 is the only one with more than one switch not working, then also test the pre drivers (smaller transistors) then report findings here
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