Alesis MMT-8 User Manual download pdf (Page 5)

Wiring up the memory chips

The top end of the chip is marked by a small notch in the end of the chip.

1) Bend the rows of chip pins slightly inward to get them to fit in the socket holes. This is best achieved by placing

the chip on a table on its side and rolling the chip over slightly while pressing down on it. Do this to both sides of

the chip.

2) Bend out pin 30 slightly at an angle from vertical on both chips. When we insert the chips in the board sockets,

we want this pin to NOT go into the socket hole, but instead be on the outside of the socket.

3) Bend out pin 31 slightly on chip 2, as directly below it on the circuit board is the +5V supply point to the chips.

We don’t want the pin to touch this point.

4) Bend out pin 1 of chip 1 completely horizontally. This is because on the board, there is a small chip directly

under where this pin will go. If it is not bent out flat, the pin will hit the top of the chip and prevent the memory

chip from seating in its socket.

Chip 1 Chip 2

Pin 30

bend out

slightly

Pin 30, 31

bend out

slightly

Orientation notch Orientation notch

Power supply

wire for chip

Power supply

wire for chip

bend out

horizontally

(chip 1 only)

1 2 3 4 5 6 7 8 9 10 11 12 13

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Alesis MMT-8 User Manual Page 5