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Showing results for tags 'mpu3'.
Found 10 results
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Restoration *attempt* I was given this machine by CJ on here thank you to him 👍 This is my first MPU3 I ever owned so will be a good project hopefully I can restore but it may be a bit out of my league I will try my best. First I got to start with the cosmetics so I think the current plan is to strip everything out of it clean the parts up, repair etc. This is gonna a long project! Any advice that any one could give me would be most appreciated, or just want to leave your thoughts that ok to The machines current condition as photoed (Before) will be posting updates along the way. Wish me luck lol
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Hi all, I've been lurking here for a couple of days and read up on much of what is available here on the Barcrest MPU3. Thank you so much Midibob for all the info you so freely shared! I have owned a Barcrest Royal Diamonds for years, acquired it in '97. It was missing a 7 segment display (easily built) and the battery was bad (easily replaced). No real damage to the board nor the transistors. One 74LSxxx was bad. When I couldn't figure it out I (get this) called Barcrest, got connected to their Technical Department and ended up talking to a guy who helped design this particular game! His tips quickly led to a faulty 74LS12 (if I remember correctly) and it has been playing ever since. Well, that is; it was stored in the back of the garage for the last couple of years and then, on trying it a couple of months ago, it wouldn't budge of course. I have some experience in repairing electronics, am a HAM, and have restored a couple of Solid State pinball CPU boards (most of 'm damaged by battery leakage). So, after reading up here on the MPU3 stories I tackled the RD last weekend. It was ever so simple... the battery was flat but when connected to a separate Power Supply it charged neatly and holds its voltage for at least a couple of days. Checking the Test Points with a multimeter and a service scope gave a funny reading on the RESET line: it stayed low. Well, the board should not be resetting continuously and a quick look at the schematic suggested bad transistors or a bad Tantalium cap. I do not have any of the transistors in my junk box, but a reasonably fresh 10uF Tantalium cap was. Replaced it and Presto! If life would only be so simple more often 😉 Tested the game this morning and after resetting all the readings seem to indicate everything is working. The only things left now: I have a wiring diagram for the Royal Casino which is probably very like the Royal Diamonds but I'd love one for the RD. Also, the green diamond lamps all light up just as bright as all the others but still they are poorly visible. I wonder if the glas is dirty on the inside? Hope this will do as an introduction. Now everything is running I'll probably won't be visiting daily, but I thought it only polite to let you know how the forum, the info and you people are appreciated! BartW. PS: Oh yeah, one thing that has been bugging me: what the heck is the 'Aerial' used for that is tied into the Harness??
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Good evening all I thought I would share a picture of my new addition. I have been after one of these for a long time. Made in my childhood home town of Newark on Trent this was a Bonner Wilson and Bonner Classic 1986. Great sounds and gameplay I'm over the moon. Thanks for looking Mart sorry pic is wrong way up Thanks for the sale Phil!
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the one before BIG SHOT and after CIRCLE SKILL -
Hi all, I have crudely made an excel spread sheet of components in the MPU3, may of done it sometime ago. I thought I would share it for 'refinement or discussion' if anyone is keen. I have not spent much time lately on MPU3 issues but probably will get back into it this year I hope. Its great seeing MidiBobs stuff, cheers. I cant post it here, where can I post a spreadsheet?
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A machine called Optimum, from Associated Leisure. On the MPU3 tech. -
Some of you may have seen this come up on gumtree. It was sold, but they got let down and I got lucky! especially as I was within 20 miles today and was cheap as chips Unusual machine, made by Video fruit service, £100 JP with dual stake and 2 sets of prizes with each stake? I was surprised to find it runs on MPU3, so should be fixable with a bit of help.... Looks in great condition - looking forward to having this running I haven't taken the board out yet - first job - to see how bad it is
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Heres a bigger picture of Hit Line, by BWB. Its a cracking 2p play game with a £2 jackpot. No nudges tho on this one-Cash Pot or Super Series only!© Vinny
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is this correct my machine above has a cancel button but there is no wiring what so ever for the bulb and its not been removed harness is all there all original ties are in place the switch works ok just cant run a bulb in it any one please advise
