Apple PowerBook 165 - Manual (Page 106)

Take Apart Floppy Drive - 46
Note:
Follow this procedure
if a rectangular green heat
sink extends over the floppy
drive.
1 Remove the screw
holding the heat sink
over the floppy drive and
lift off the heat sink.
2 Remove the mylar
insulator attached to the
drive retainer.
Mylar Insulator
Heat Sink