(Topic ID: 219660)

Magic City Motor Fault

By Gavwalters00

3 years ago


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Topic Stats

  • 17 posts
  • 7 Pinsiders participating
  • Latest reply 2 years ago by HankJ
  • Topic is favorited by 1 Pinsider

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Pinball (resized).png
2018-06-22 21.00.17 (resized).jpg
mclock (resized).JPG
mcgo (resized).JPG
Magic City Coin relay (resized).jpg
Pinball (resized).png

#1 3 years ago

Hi

I have a fault with a Williams Magic City machine I have been given.

Details in the video.

Any information would be greatly appreciated

#2 3 years ago

Nice looking machine!

First, be careful manipulating the machine when it is plugged in! If you look at the schematic there is a lot of circuitry that is running at line voltage (everything above the transformer in the schematic).

After plugging in the machine, you can press the left flipper button to power it on, or drop a coin. No need to push the lock relay.

If you are keen to learn, go to http://www.pinrepair.com/em and start reading!

You may want to check fuses for continuity using a multimeter.

The score motor runs until the machine completes its reset sequence, so it is normal for it to keep chugging along if the machine will not reset.

Try to change the score to "1111" (you can manually move the solenoid plungers to do so). Power up the machine and drop a coin. Do any reels reset to 0?

#3 3 years ago

While this is happening, if the Reset relay is holding energized here are the switches that could be causing that.

Pinball (resized).png
#4 3 years ago

The Relay Bank keeps resetting unnecessarily. Here's the relevant part of the schematic:
Magic City Coin relay (resized).jpg
The Relay Bank Reset solenoid (bottom right) fires once per 180 degree motor cycle only if the normally open switch on the Coin Relay (in the red box) is closed. I think the Coin relay should fire briefly to reset the Relay Bank just once, and then relax before the Relay Bank resets again. So either the switch in the red box is stuck closed, or the Coin relay is stuck on.

If the Coin Relay is on through all of this carefully examine the normally open switches in the Coin Relay circuit (in red). It's possible that either the 5 cent or 10 cent (or whatever coins your game is set up for) switch is stuck closed. They're just below the coin mechanisms on the coin door. If those look ok, examine the normally open switches on the Game Over relay and the Ball Unit to make sure they're open too. If in doubt you could slip a small piece of paper between the contacts of each of these switches to see if any of them lets the Coin relay relax once they've been forced open.

/Mark

#5 3 years ago

But the Coin relay won't drop out until the Game over relay changes state. The G.O. relay is forced on as long as the Lock relay is not energized or any normal tilts are stuck closed.
mcgo (resized).JPG

The Lock will not hold in if any kick off switches (Slam switch on bottom board) is open (should be normally closed).
mclock (resized).JPG
But RESET will never release until all 4 score reels are at zero (see lowest switch on snipet above). So, the OP should manually set all 4 score reels to 0 first (you can see in the OP's video that the score is sitting at 1000) and see if the reset cycle will end after coin drop. Then, he can see if the score reels can zero themselves if set to 1,111.

Oddly enough, Magic City would appear to NOT be one of those games that pressing the left flipper button will turn on the lock relay (and light the lights).

#6 3 years ago

That's a nice looking machine, one of my favourite Williams from that era.
I tend to agree with the other replies. The machine cannot enter game mode until it has completed the reset sequence. Check the suggested switches as shown, and certainly take time to read through the Pinrepair EM section on the site.

Word to the wise too, DONT be tempted to begin cleaning and adjusting random switches unless it is necessary. Unless you are au fait with EM servicing,etc then you can easily end up putting more faults on it that those you are trying to fix. One fix at a time!

#7 3 years ago

Thanks everybody for viewing the video & posting help. It’s appreciated

I’ve been through some bits & bobs and as mentioned when I’ve set the score to random numbers the first three reels reset when power up but the fourth doesn’t.

I’m guessing it might the solenoid that controls the reel although there is a loose cable in the area that I can’t see where it has come from.

It’s not long enough to reach the fourth reel but might be a loop wire?

Hopefully a picture will be attached

2018-06-22 21.00.17 (resized).jpg
#8 3 years ago

Ps it does bring the lock relay in by pressing the left flipper and lights on the back panel.

#9 3 years ago
Quoted from Gavwalters00:

the first three reels reset when power up but the fourth doesn’t

Is that the 1s or the 1000s that doesn't reset?

#10 3 years ago
Quoted from Gavwalters00:

there is a loose cable in the area that I can’t see where it has come from.

The dangling wire looks like a heavy, yellow wire with no tracer (2nd color). If that's the case it's likely one of the solenoid/relay power rails that daisy chains its way through many switches. In your photo you can see two yellow wires soldered together on one switch tab on the middle score reel. Could the dangling wire have broken free from the other yellow wire on the left most score reel? The dangling yellow wire seems to be bundled right next to the other yellow wire which could be another clue.

#11 3 years ago

It’s the 1000s that doesn’t reset.

Yes it’s a solid yellow wire which looks like it links through but each tab has two wires & there are already two wires on the 10s reel so I wasn’t sure it came from here. There is only one wire on the 1s Reel but thought this might be the last link so discounted this. I’ve looked for evidence of where it has broken off from & it’s not clear.

Bit of a sod really

#12 3 years ago

All solid yellow wires are the same. No harm in connecting it to the other one. Use an aligator clip jumper and see what happens.

#13 3 years ago

Unrelated to the fault I love the look of the machine but it need some tender loving care.

The back glass has some paint deterioration which I would like to get sorted once it’s running.

It was built in 1967 which was when I was born too so sentimental value

The guy who gave it me knows the history.

Apparently it was collected from Weston supermare pier when then amusement arcade shut down many years ago.

The guy collected six & one was kept for himself which has been in his family since his kids were young (they’re the same age as me!)

The outside paintwork is tired but this is easy to repair & the legs are rusty but I’ve seen replacement legs for £70.

I’ve always wanted a pinball machine & am over the moon the customer has given it to me.

He knows I will get it working, tidy it up & pass it on to my kids.

All of this makes it valuable to me regardless of any market value.

I really do appreciate any help you guys are giving.

Thanks

Gavin

#14 3 years ago
Quoted from Gavwalters00:

the 1000s that doesn’t reset

Inspect and diagnose this circuit with Alligator clip jumper wires. Anybody know why the Ball Count unit is involved?

Pinball (resized).png
#15 3 years ago

Ball count is a mystery. Perhaps in case some ends a game with balls remaining and they wanted to wait until the ball count stepper went to zero before sdding the 1000's reel?

#16 3 years ago
Quoted from Gavwalters00:

Unrelated to the fault I love the look of the machine but it need some tender loving care.
The back glass has some paint deterioration which I would like to get sorted once it’s running.
It was built in 1967 which was when I was born too so sentimental value
The guy who gave it me knows the history.
Apparently it was collected from Weston supermare pier when then amusement arcade shut down many years ago.
The guy collected six & one was kept for himself which has been in his family since his kids were young (they’re the same age as me!)
The outside paintwork is tired but this is easy to repair & the legs are rusty but I’ve seen replacement legs for £70.
I’ve always wanted a pinball machine & am over the moon the customer has given it to me.
He knows I will get it working, tidy it up & pass it on to my kids.
All of this makes it valuable to me regardless of any market value.
I really do appreciate any help you guys are giving.
Thanks
Gavin

PM me about your backglass as i might be able to fix that for you.

10 months later
#17 2 years ago

Hello, I have the exact same problem with my Magic City, the '1' in the thousand position won't reset to zero. what fixed this?

thanks,

Hank

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