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Brilliant Bob, I have a board that I lost this and the 2 metal brackets either end! I found this plastic bit but the holes are cracked around where it screws on. God knows where the brackets went

Hi chaps, and chapesses. As I get MPU3's in various states of damage one of the most usual things is the cart holder is either missing or broken. As everyone knows without the holder intermittent faults abound due to vibration. Trying to find spare carts is more or less impossible so I thought I'd have a go at knocking up a 3D version. Here's the 2nd attempt, the 1st one the mounting holes spacing were about a 1mm out. I can probably use it but wanted a good one straight off the printer. Having said that it does need a little filing to ease the connector in but everything lines up which is the main objective. I will install it this afternoon and report back but so far all looks good. The rough bits on the bottom are where the supports have to go to enable the raised bit which takes the metal brackets. I cut those off with a small chisel. If there's any interest I'll post the STL file so you can print your own or if you want to improve it. All I ask is you post it back here so I can use it as well.

Yeah no alarm sounded, I did have the black and orange plugs out at first but it showed the same behavior. Thanks Ronnie

Hmm, if that's an error 0 then it's a coin alarm. If the sound is OK I would have expected an audio alarm too? You could try right hand switch 6 or unplug the black and orange connectors. Probably not the problem but quick to check.

Just hooked it up to adders and ladders, it judders the reels then the reel opto lamps light then nothing, just keeps them lit? the display shows a zero

Good idea.

Excellent Bob, thanks, my main machine is non alpha maybe I should hook it up see if results are same as yours?

I had a board do this just recently, it ran two other games OK but the one with an alpha just booted to 'resetting'. I think it's still here so will investigate and let you know.

Everything as far As my limited skills go seems to be running, I checked the 500hz at the 555 timer all good, could it be one of the pia's stopping it? Thanks Ronnie

Can't see as it would as that error would be to do with the character chip either bad or missing on the cart? Although it does sound like it was running before so who knows.

Quite a few of these in Southport, back in the 80's. Jackpot was easier to gamble to, then just land 3 of kind. Bells however, would repeat hold on the bell feature, and the 2 quid win. I think there was a clone of this machine. The gamble trail was on the right, and stacked in a pyramid shape. Oldskooler

Yes thats right Bob ,, I am going to get the original deck back on Monday to see if that’s makes a difference,, it’s been sent off for new reel bands ,,

Looking at the wiring diagram err 7 is a characteriser fault! (I'm assuming A/L is Adders and Ladders?)

Afternoon chaps,, I wonder if anyone as come across an display error 7 on an mpu3 A/L it more or less boots reels spin etc then at the last stage it freezes and alarms ,, any help or support is much appreciated,, thanks

Hi looking for gsquared file kung fu pounda if anyone can help many thanks in advance

Must admit I've fitted one or two the wrong way round too! Nice one ronnie glad it's working.

Hi all my name is Ruthless joker i'mhere and interested in fruit machine roms

Messaged thanks

Wow what a shout.👍

I've got a couple of spares, drop me a PM and I'll get one over to you.

No idea Bob it’s still working even the sound is solid which it was not before it started playing up, I do have some 541’s on the way but as you say I will leave it well alone

Your best bet is to look on Ebay for '32mm fuse holder'. There's loads of different shapes and mountings. You'll have to buy the whole holder as it's extremely unlikey you'll find just a top.

Hi Bob good to see you back😃 yes says resetting tp (tupenny chance) I use this cart on the bench as it uses an alpha so handy to see it booting or not, I’m sure I used this same cart when it would boot to reel a error at which point I would fit it to my adders and ladders to see if anything else needs fixing thanks Ronnie

Are you saying the alpha just says 'RESETTING'? If so what game is it as I know some games need to have certain switches operated to run.

Don't worry I've done it too