(Topic ID: 231549)

Bally Em sticks on 9

By Gorgar666

5 years ago


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  • 27 posts
  • 7 Pinsiders participating
  • Latest reply 5 years ago by ChipS
  • Topic is favorited by 1 Pinsider

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#6 5 years ago

If one player score causes others to score (or tries to), look at re-gapping the reset relays

also tighten the switch stacks before re-gapping

Looks like it may be somewhere on reset relay #2

https://www.ipdb.org/files/1704/Bally_1976_Old_Chicago_Schematic_Diagram_paginated.pdf

1 month later
#17 5 years ago
Quoted from ChipS:

Here's a photo of my alternator relay (it's the one in the center).
[quoted image]

What is that relay to the right? looks like what I think is the spring retainer is loose. perhaps the spring is missing as well.

#19 5 years ago
Quoted from ChipS:

Relay to the right of the alternator is labelled "Top Hole," which I believe would be the top kickout hole.
You are correct - the spring is missing, although that relay is functioning properly and kicking out the ball.
That wouldn't affect the alternator relay, would it?

I guess not according to the schematics ... what is the resistance of the alternator coil ? should be 78 Ohms , (can check with machine off) if infinite resistance see if tiny coil wire came off lug. I would guess a zero resistance would blow a fuse.

#22 5 years ago
Quoted from ChipS:

Just checked resistance of alternator coil as you directed. It shows 72 Ohms. Close enough?

That value seem good.

There is a Jones plug between the match unit & the alternator relay. the schematic shows the wire color as "98-7" the color chart is on the bottom of the schematic and there is a map to where "98-7" lands on the jones plugs in the back box ("cabinet to insert plugs")

https://www.ipdb.org/files/1704/Bally_1976_Old_Chicago_Schematic_Diagram_paginated.pdf

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