Leaderboard

since I needed to repair a lot of these, remaking them was easier... I know others did do the same, but the shipping and tax to import these boards into europe makes them very expensive.

Hello everyone, You may remember a few months ago i mentioned this project to do one day and that day has come. The machine is not working but i am working on that (ie recapped, replaced voltage regulator and checked clock etc), anyway my main confusion is with the MPU1 as i may or may not have some components missing. I am not sure if it came from manufacturing like it or they have been removed (from the back it looks like the former and the front maybe the latter. My plea for help is could someone have a look at their board and tell me the values for D1,D2,R1,R2,R3,R4,C1 and T1, i may or may not fit them, i need to trace them out properly to see where they fall in the circuit but it does seem strange. I would be forever gratefull if someone could have a look. I have attached photos so you can see what i mean. (missing components in the red box) Cheers Jim

I’ll be paying this a visit ASAP

I wouldn't bother fitting those components. You do have the correct values though. D1 & 2 are 1N4148, C1 is 33uF/25v and T1 is ZTX108. All it did was put a delay in the RESET and I've put a note on it saying not fitted to most boards.

Hello. Thank you CanonMan. I tested : BR1 was right but REC1 was short-circuit. I changed it and now the machine is a little less broken down 😃 When I swtch on the machine, I hear music and some seconds later (time for reset) the digital display and the coin mech light on. That's all but it's a little better. I send the proms today to my friend and I will let you know.

Thanks for your input everyone. I bent the cradle in slightly, and it worked a treat. Coins go in every time and exit through the micro switch. Easy fix for a frustrating problem

I would bet that BR1 has failed short-circuit, very common in my experience.

They were designed to try and combat a high degree of fraud on S1 coin mechs. Any coin the wrong size that did not fit the cradle at the back would drop out the back,As the front reject plate of the mechs were being levered to one side to gain access to the coin switch from the front so,The metal shield over the coin switch was another anti fraud device then upgraded to the black plastic fitting which completely encapsulated the switch wire arm was another addittion.The black plastic fitting will also spit coins out the back but, As they not used in sevice,as it has been said just block that gap at the back of the unit as shown in picture.