HELP my Rat-Race pleeeeease!

[PLAYER]

Hi all, i have just got my hands on a Rat-Race after many years of searching and i have a problem already :-( I have only had a couple of MPU3 machines and am a bit stuck. When i went to pick it up i checked it and the sound was ok. Not really loud but they never are on this type of machine (in my opinion) but it worked ok. Got it back and started piling my 2p's into it and noticed the volume get lower and lower. It is now very low, so low that you can hardly hear it. I have tested the speaker and the little volume pcb and seem to be ok. I have to assume that the amp is on the MPU3? I have had a look at it but nothing seems to stick out and hit me. I had exactly the samr problem with a "Autoroute" some years ago. I would appreciate ANY kind of help and if someone could point me in the direction of a schematic i would be very grateful. Please help as this is the last piece to my collection and i want to work o so badly.

Cheers

John

[Toddyuk]

You might be better posting this at the Mecca , Some very knowledgeable guys over there especially for this type of era . Hope that helps

http://www.fruitemu.co.uk

[PLAYER]

Thanks for that advice Toddyuk. I have managed to track it down to a missing voltage on the PSU. I need to know what voltages go in. Once i have found this out then job done.

[captainhaddock]

here's some info to help you out.

Dave.