Hi Pinballrus
a strange situation. I show a snippet of schema Jack in the Box. I want to find out AAA: The problem is in the circuitry of "Self-Hold-circuitry" - BBB: The problem is in the circuitry of "feeding the Coil on the Extraball-Relay - BUT faulty feeding-forever".
Please look for the BX-Extraball-Relay -> a short wire of any-color runs from one side of the coil to a switchblade (usually Bottom-Switch, bottom blade). AT THAT Solder-Lug is also soldered on: One or two wires "color-white". THE OTHER Switchblade has soldered-on: One wire "color-blue-mingled-with-black" -> UNSOLDER*** wire "blue-black". Then start a game and gain "Extraball" - have a good look at the BX-Extraball-Relay: Does it pull-in and let go (means problem-type AAA) <-> it pulls-in and keeps-on pulling (means problem-type BBB) ? (((A slight chance - CCC is: The relay does NOT pull-in - not a tiny bit of pulling)))
What do You have ? (AAA or BBB or CCC) ?
UNSOLDER***: K-Mart and such stores -> Automotive Departement -> Car Electrics -> single plugs (male and female) - You can mount these plugs by squeezing --- using a pair of pliers.
Unsoldering a wire is easy - but when I am afraid of "cannot solder the wire back-on": Then I cut the wire a couple if inches away the solder-lug --- and mount such plugs - I take a cigarettd lighter and burn away a bit of the insulation ...
Theory: problem-type-BBB would be strange - circuitry with many switches (would have to be faulty) these circuitrys end in a wire-color-WHITE.
problem-type-AAA is rather simple - BUT You have written "checked the runway switch and this switch is good".
So I want to find out: Do You have AAA or BBB or CCC ? Greetings Rolf
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