9 replies to this topic

[qorn]

Hi and thanks for looking.
I've just bought Cops n Robbers from the freeads, but when I got home, It didnt work.
None of the front lights light up and the machine doesnt inishilise, there are two leds on the MPU, one red and one green, they both stay on.
Ive looked at the power supply, and that looks ok as far as I can tell authou I dont know the exact pin outs of it.
Is there a problem with the program?? I found an eprom lying in the front of the machine, but I can see where it came from.

Does anyone have any ideas on what it could be???

Kind Regards

Dave

[ady]

Hi Dave welcome to Fruit-Emu, hope you have fun.

Afraid I cannot help but there are many on here who can and will.

As you can see I altered the title to the thread, It's a better idea for the title to be a Bullet Point, this will attract the attention of the guy's in-the-know as they are more likely to open that and read it rather than a simple Need Help

Ady

[qorn]

Thanks and thankyou Ady
After looking about for a "Fruit Machine Comunity" this looks the most frendly and helpfull.
I think its a problem with the Scorpian 2 MPU board or the Program chip is empty.

Kind Regards

Dave

[shaun2097]

the eprom you found in the front of the machine my be and old prog ver, that was updated. most companies when they replace an eprom for an update leave the old one in the machine.

as uve transported it home, is it possible that the eprom card may not be seated correctly in the mpu? try pulling it out and reinserting it. (with the machine powerd off!) and also try reseating the sound card next to the prog card.

possibly wont be the problem, but its worth a try. other than that try getting an mpu and psu from ebay maybe?
im sure that sombody else here may be more helpful than me, but its very difficult to fault find without being able to be "at the machine"

good luck

[skabaz]

if the game card is seated properly and both red and green led's are still lit then the machine is stuck in reset mode.

you will need a replacement mpu to cure the problem.

this was a common fault on these machines after they got to a certain age,bellfruit then brought out updated mpu's(i think they replaced certain resistors on the mpu).

so it looks like the mpu you have is faulty.

15-20 quid on ebay or check out if you have a supplier near you because at least they can test it before they sell it to you.

baz

[qorn]

Thanks for your help Shaun and Baz

Ive had a look at eBay and there arnt any on there at the moment, but ive found the number of a "Fruit Machine Scrap Yard" and they have a scorpion 2 MPU board for £25

Is that a good deal??

Many thanks

Dave

[skabaz]

as long as it works!!!!!

baz

[qorn]

Hmmmm
They want £42 all together (P&P + VAT)

Does anybody know where I can get a Scorpion 2 MPU board from??

Kind Regards

Dave

[Niven]

hey qorn, £42 is a bit expensive, i think so anyway! your best bet is to speak to some of the local arcades, or machine repairers, my mpu/4 went on the blink recently, went to the arcade and got 1 for free.

if the arcade has old machines, you'll find they'll eventually chuck them, and save the boards and coin mechs etc for spares, worst case scenario, offer them a tenner, if they say no, by all means ebay it, or spend £42.

hope this helps
Niv.

[qorn]

Thanks Niv

I've rang around all of the local repair/hire companys and they dont have any Scorpion 2 boards about, as the machine is so old (I turn around and look at the machine and ponder, sould I just sell it in my local antiques store???)

Ive looked at the MPU board and have found some track damage under the battery, where it had leaked. (Battery acid corodes the tracks) I've repaired the track damage, tightend the pins on both the processors, reflowed the solder joints on the eproms and connectors, reflowed the power supply, removed the test switch and cleaned the pins on the eprom.

I now have the Reset LED staying on but it pulses off every 1 second, I have been advised that it is probibly another track problem, but I have bridged every track that looks "worse for ware".

The board gets its Logic 5V from a voltage regelator on the 12V rail, but this gets very hot, and none of the components warm up, does this sugest that there may be a problem with the regelator???

Does anybody have any advise they can give to me??

IF YOU HAVE A FAULTY SCORPION 2 BOARD, PLEASE READ THESE TIPS:

Just a note if anybody is having problems with a scorpion 2 board in the future, the Promcard and Expansion socket are in parellel, so you can plug the game card in any socket, try using the expansion socket for the game card.
The processor sockets have a tendency to bow in the middle causing the pins to not touch the processor, simply remove the processor and pull each pin out slightly with a VERY SMALL screwdriver, replace the procesor.
Check the battery voltage, if the battery is flat, the game wont load, if the battery is at the end of its life, replace it with a new one from maplins.
If your battery has leaked, Wash the pcb with a mixture of vinegar and water (50/50) to neutralize the corrosion and scrub with a toothbrush. Rinse the washed board with clean water and then rinse the board with 99% pure alcohol. This will disolve and wash away the water. Repeat this step. The alcohol will evaporate fairly quickly.
Repair any track or componect damage, NOTE the board is only dual sided, so you dont have to worry about track layers within the board.
If you have access to a ociliscope, check to see if the ocilator is ocilating, it has been know for these to fail..
Check the Pink and Red wires inside the power supply, these sometimes get very hot and cause the connectior to melt and change colour, if it has, then either solder the wires directly onto the board or replace the connector, this was a known design fault.
Check the fuses, they get very hot and often melt inside or cause a dry joint, if they have melted, replace them with a fuse holder that has a good current rating.

The board only needs 12V to run as the board gets its 5V from the 12V Rail, when testing the board, the only things that can be left disconnected are the alphanumeric display and the lights, but the board needs everything else, this then tests to see if there is a short in the lights or the display, this will also cause the board not to power up.

Mayby there should be a Repair Tips Forum with topics for each machine for tips on repairing the boards/machines
Just moderate the new topics to keep the forum tidy and to make sure each user posts in the right topic. I'd be willing to do it! as I think it will be invaluable infomation for each user.

Thanks for reading
Kind Regards

Dave