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TOM - Trunk Magnet and Subway ball release solenoids failed

RGV

RGV

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10 Years
Joined
Aug 18, 2013
Messages
851
Location
Middlewich, Cheshire
These 2 solenoids appear to have failed mid-session this week on my Theatre.

Checking the manual they appear to be the only ones powered through pins 6 & 7 of J907 on the Flip II board which became my primary suspect. However the wiring seems connected to the J907 connector firmly and reseating the J907 connector itself giving no joy suggests its not a simple loose connection issue.

Checked and reseated the J902 connector that seems to handle the drive connection for both solenoids and also replaced the F901 and F902 fuses (The latter just in case the manual had the wrong one listed on the circuit diagram). Again, no joy.

Anyone got any suggestions for next steps on the diagnosis?
 
Check for +50VDC in relation to ground on J907 pin 6&7.

If that checks out, check for continuity between J907 pin6&7 -> J902 pin6&4 and J907 pin8&9 -> J902 pin3

I'd be surprised if its the transistor as the magnet and subway don't share the same one.
 
Carl Spiby said:
Check for +50VDC in relation to ground on J907 pin 6&7.

If that checks out, check for continuity between J907 pin6&7 -> J902 pin6&4 and J907 pin8&9 -> J902 pin3

I'd be surprised if its the transistor as the magnet and subway don't share the same one.
Click to expand...

Cheers. Will check tonight.

J907 pin8&9 should run power to the left drain magnet though and I'm pretty sure that was powering up ok when I ran through the solenoid checks. I'll check again to be sure though. This is all assuming there's no typos in the manual ofc :)
 
Carl Spiby said:
F903 is what fuses both pins 6 and 7 on J907, so the solution is probably to replace that :)
Click to expand...

Is it? Bugger. I'm sure the circuit diagram I was looking at had it as F901.

Edit - Double checked and my manual has F903 For J907 pins 1&2 (Right Flipper) on the Flipper coil diagram.

Will try it anyway and hope to eat my words if that fixes it :)
 
Last edited:
And the winner is.... F903. Bloody lying TOM manual... :rolleyes:

Thanks Carl - I'll pencil in an update to my TOM manual and get hold of the WPC-S Schema for future usage :)
 
What you like Roger not having any spare 3amp fuses. Tut tut.
There's no excuse not to have the most common fuses.
 
replicas said:
What you like Roger not having any spare 3amp fuses. Tut tut.
There's no excuse not to have the most common fuses.
Click to expand...

What can I say? I'm still a beginner at this.

I've spare 5A & 8A atm, but no 3As for some reason - Maybe you should do a "spares every pinhead should have" list :)
 
Like Carl says 3.15A is fine but if you're very particular then you can buy 3A from uk.rs-online.com :)
 
Or you can use the spare ones kindly sitting on the power driver board at F101 and F102. These are left over from the redundant flipper circuitry on the board. A couple of games use these outputs for additional toys but don't think ToM uses them.
 
pinballmania said:
Or you can use the spare ones kindly sitting on the power driver board at F101 and F102. These are left over from the redundant flipper circuitry on the board. A couple of games use these outputs for additional toys but don't think ToM uses them.
Click to expand...

The way I was reading the manual I thought TOM was using the "Upper Flipper" circuit for the solenoids in question. However as Carl has highlighted either the manual or my understanding of it is flawed in some places.

I'll try taking them out and see if it has any effect. If not - Free spares! :)
 
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