Posted 20 January 2010 - 01:35 PM
Need to know the manu of the machine, and if poss, the hardware platform it operates on, like Impact (JPM), MPU5 (Barcrest), Scorpion 4 (Bell-Fruit / Mazooma), Epoch (Maygay), etc.
As for volume control, some machines require the use of a refill key ( I know my JPM GUAB needs this), which is located normally near the payout tray, and most of the time, it's a Lowe And Fletcher (L+F) 87000 flat key, though there are others used.
As for MPU4 based games, there is a small POT adjustment on a long black peg, that is located either on the main MPU, or on the game card itself.