Sanyo MBC-550 Series User Manual page 298

6) Seven memory chips will fit into the sockets in
column B. One memory chip must be place in the last
socket in column A. The order that you place the chips
does not matter.' How you insert the chips does. Look
at a chip. One end is flat, one end has a half circle
cut in it. This half circle should be facing toward
the panel. All lettering on these chips and the ones
in column B and A should be reading in the same
direction.
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