4
pressing one edge of the chip, then the other, against a flat surface
such as a table.
• Notice that each chip has 4 numbers on the right side of its sticker.
(See diagram at right.) An asterisk (*) next to the number shows
which of the 4 sockets the chip should be inserted into. Gently insert
the 4 chips into the 4 sockets, orienting them as shown and being
very careful not to bend any of the pins while inserting. After you
have installed all 4 chips, visually inspect them to see if any pins are
not correctly inserted into the socket.
• That’s all. Now, close the lid. Don’t put the screws back in yet—
we’re going to test it first. Skip down to the section “Test the
installation”.
If your unit does have the MPC-SCSI upgrade installed
The diagram on the right shows a top view of the center circuit board of the MPC60 or MPC60-II with the
MPC-SCSI board installed. (The appearance is the same for the MPC60 and MPC60-II.) This circuit board
contains the 4 ROM operating software chips to be changed. The following instructions refer to this
diagram.
• On the Marion Systems MPC-SCSI board, disconnect wire “A” from connector “B”. Then remove 2
screws “C” and set them aside.
• Slowly and carefully fold the MPC-SCSI board back over the
circuit board immediately behind it and hold it back using
something like a book.
• With the MPC-SCSI board folded back out of the way, locate the
4 existing ROM chips “D” in their sockets. Before you remove
them, write down which chip goes into which socket in case you
want to reinstall the old chips later. To remove the old chips,
carefully insert a small blade screwdriver between one of the
chips and its socket on one end and very gently twist the
screwdriver to pry the chip up a small amount. (Don’t insert the
screwdriver between the socket and the P.C. board as this will
remove the socket!) Then, do the same thing on the other end of
the chip and again pry it up a small amount. Do this a little bit on
each end a few times until the chip is removed from the socket.
Repeat this process for the 3 remaining chips.
• Find the 4 new ROM chips supplied in this kit and remove them
from the shipping tube. First, very carefully bend the pins on each
chip so that the 2 rows of pins are parallel to each other. (See
diagram on previous page.) This can be done by pressing one
side of the chip, then the other, against a flat surface such as a
table.
• Notice that each chip has 4 numbers on the right side of its
sticker. (See diagram “Correct position of 4 ROM chips” above.)
An asterisk (*) next to the number shows which of the 4 sockets
MPC60 *1
v3.00 2
11/3/95 3
©RLD 1995 4
The asterisk
(*) on the
right side of
each label
shows the
correct
socket
position for
each chip.
Position
the chips
so that the
notch at
the end is
pointing to
the right.
MPC60 1
v3.00 *2
11/3/95 3
©RLD 1995 4
MPC60 1
v3.00 2
11/3/95 *3
©RLD 1995 4
MPC60 1
v3.00 2
11/3/95 3
©RLD 1995 *4
Correct position of 4 ROM chips
upper P.C.
board
SCSI INTERFACE
FOR AKAI MPC-60
MARION SYSTEMS
CORPORATION
C
B
A
D
(241 paginas)
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