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Boabyb

The Simpsons Beer Guide not fully powering up

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Posted (edited)

Hi All,

Newbie from Glasgow who has just joined after picking up a free Simpsons Beer Guide Maygay machine today which has a fault.

Powers up but only light on the outside is at the bottom left flashing red with a low annoying speaker sound. No other lights, display or reel movement as if it's completely dead.

If I open it up there are some LEDs lit on the MPU, PSU and some other boards but not all of the expected ones are on.

Got pics below of the various boards and lights, I'm thinking PSU fault from what I've read but hoping you guys can help me and point me in the right direction on what to do or replace?

 

Cheers

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Edited by Boabyb

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Posted (edited)

no 'sync' light, no -12v and most likely as the machine says a 'duff' mpu board

 

how much have you allocated to spend on getting it running?

Edited by Andrew96_

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Posted (edited)

Thanks for the quick replies,

Assuming then it could be both the MPU and PSU that are faulty?

Looking at the battery it doesn't look likes it's leaked.

Not really thought about a spending limit tbh, I suppose if it cost up to roughly the same to buy one working I'd be comfortable with that.

Edited by Boabyb

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20 minutes ago, Boabyb said:

Looking at the battery it doesn't look likes it's leaked.

Photo please. Close up of the board, in focus. 

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I've taken a few, hopefully the close ups of the battery are clear enough.

Thanks

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definitely corrosion on that MPU board, also the main processor does not look that corrosion free either, weather you will find another fully working at a price your happy with will remain to be seen, also any of the connected satellite boards could be at fault stopping it booting, without  a full set of spares (which is costly) to try I think your going to struggle with it

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I was hoping you wouldn't say that lol

Are the lights on the PSU that aren't lit related to possible MPU being  faulty or is that likely a separate PSU fault as well?

Sorry, I'm a complete novice at this but willing to learn quickly.

Worse case I'll get rid and buy a known working one.

Cheers

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1 hour ago, Boabyb said:

Are the lights on the PSU that aren't lit related to possible MPU being  faulty or is that likely a separate PSU fault as well?

It should run without -12v unless yours is a machine that needs it, as for the sync light, I Have no idea as never seen a machine with no sync light and working

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That’s likely why you got the machine for FREE! That Type are costly to fix!

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Posted (edited)

Seen some MPU boards on eBay not far away from me but untested and showing signs of battery leak. Don't see any PSUs available anywhere so think I'm defeated before even starting.

Appreciate the answers and advise, what brand would you recommend as I'll go for a working one I think now?

Edited by Boabyb

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Posted (edited)

I think with the v sync out on the psu, the mpu will just keep reseting. Yours isn't poping out of reset at all?

I would still try a power supply first though.

Could do with a closer picture of the mpu here in the red circle. If you have a multimeter check continuity to the transistor pin/resistor on the blue dots. The tiniest amount of rot can take an epoch down but they can still make good boards. All boards start off with only one trace broken.

I'm happy to test the main board if you post it(recorded). I wouldnt recommend you buy any untested Epoch especially with battery damage. They're all going to be more damaged than your own.

As for the for the psu. The Facebook groups are the best place to ask. But try to sus out someone Legit 🤣🙂 around about £30-40

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Edited by MattyL
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Thanks Matty,

I'll see if I can source a PSU, will give you a shout about testing the board. I'll get the board off the machine and get closer up pics as well after testing with a multimeter that I'll need to borrow first :D

  • Like 1

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Managed to source a PSU which should be here by end of the week.

I took a video of mine powered up and definitely doesn't sound right, do you agree?

Apologies about the kids in the background :😄

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Took the MPU out to get closer pics if the battery on it for MattyL.

Also some pics of the underneath including a close up of the battery points from below as well.

I've also tried the multimeter and if I'm using it correctly then I can get it to buzz touching those points but the number starts high then decreases to 0.001. Been a while since I've used one but this is the setting I was recommended to put it on in the pic below.

 

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Edited by Boabyb

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Hi mate there's a few tiny holes next to the battery and a capacitor. If the Rot gets down it-its enough to kill the board looking at it though it's not gone through to the back. I'll give you the test to test that track.

I'm still thinking try a psu first. Epoch psu's are all usually noisy and it's the case rattling. It reminds me of a loud aquarium pump noise 🙂 Externally the case looks pretty ropey.

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Ok so hold one of the meter probes of the center pin of Q3 and then carefully brush the other probe on the pins of the large Actel chip on the right side. It's the second pin down from the top. This is probably the most likely trace to fail and initially kills all Epochs. Be very gentle with your meter and try it a few times.

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Thanks mate, will give that a try probably tomorrow now. 

Out of interest what are the blue bits with numbers for as one of the small white switches is out of position compared to the rest on mine?

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Those are dip switches which are for individual game config options (single/multicoin play, demo mode, note acceptor fitted etc). None of which will effect the reset of the board...sadly 🙂

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15 hours ago, MattyL said:

Ok so hold one of the meter probes of the center pin of Q3 and then carefully brush the other probe on the pins of the large Actel chip on the right side. It's the second pin down from the top. This is probably the most likely trace to fail and initially kills all Epochs. Be very gentle with your meter and try it a few times.

20201011_183940.jpg

Ok, think I'm getting the hang of this.

Just tried this and when brushing that 2nd pin it beeps and the values are between 0.6 & 0.7.

Also retried the first ones and when brushing on it it beeps and is around 0.5 & 0.6.

Hope that's about right?

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Yeah if it beeps it's usually good enough... seems like your meter is picking up a tiny bit of resistance. What value is it 0.5 ohms?  That pin needs to receive a solid 5v or the board won't work... thats probably getting a bit hard to measure yourself. Your board has low damage to the copper traces (usually these are totalled) but it could still be faulty in a number of ways as Andrew said there's corrosion there so cpu/transistors etc could be faulty.

 I'm still thinking to try a power supply first and hope you get lucky on that board personally. There's alot of people get to this stage with Epochs and get frustrated. 

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It is also the damage you cannot see

your processor pins look corroded at the very lease (in red)

there is definitely track corrosion near the main cpu (in yellow)

so I think like I show in my threads the whole area needs to be stripped, examined for track damage and repaired where necessary, all very time consuming  and not worth anyones time to do this except if you are competent enough with all the equipment to do it your self ( which few are)

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Also don’t forget t as I said on the tracks you cannot see under the main processor, like these!

 

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after all this work this board was a write off because of the damage one battery had caused, mainly the corrosion had caused more damage to the through holes UNDER the cpu than any others outside the cpu 

 

Edited by Andrew96_

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