User`s guide

With the black and red plugs each removed, slide the top plastic cover in a
rear-to-front direction, past the metal-enshrouded mechanism. The wire-pairs
from the eject-button and also from the in-use LED lamp should remain tucked
into their plastic side-braces.
You now hold the mechanism, enshrouded in its grey metal shielding, with
the external db-19 cable protruding from the rear. Remove the two medium
Phillips mounting bolts (with flat washers) from each side. Remove the single
medium Phillips bolt/washer that is centered on the upper-rear metal shroud.
Then lift off the upper-rear should and look inside.
Note that the round external cable terminates in a familiar IDE-20 flat-
ribbon connector that plugs into the inner mechanism. Unplug that inner
connector --- the small pliers can be used to rock and pull the connector
towards the rear. With the IDE-20ribbon connector unplugged, the inner
mechanism can be slid forward and out.
As you hold the inner mechanism in your hand, observe that a shiny thin
metal shroud covers its to and sides. Use the felt-tipped pen to label this
shrou's dimension: TOP-FRONT and TOP-REAR. This thin shroud should be removed
by rocking it and spreading its thin side-tabs. At this point, you have the
bare mechanism in your hand, with heads visible from its top perspective, and
with pancake motor visible underneath.
You are now ready to begin reassembly, but pause to appreciate what is
before you. Hold the old mechanism and its Mac replacement side-by-side ---
they should appear identical. The date of manufacture is coded on a sticker on
the pancake motor (e.g., 8809 = September 1989). Apply rubbing alcohol with a
cotton swab to clean the surfaces of both read/write heads.
REASSEMBLY
Remount the innermost top-and-sides metal shroud, taking care that its
"fingers" have clicked into place on the mechanism's sides. When properly fited,
both bolt-holes on each side will be visible through the shroud's thin metal. If
the shroud does not fit, or if the bolt-holes are not seen, check with your
dimensional labels to verify that the front and rear have not been reversed.
With the top/side inner shroud correctly in place, then reverse the
disassembly steps: Slide the mechanism through the front of the metal shroud.
Reattach the IDE-20 internal ribbon connector, align the two bolt holes on each
side of the outer shroud with the mechanism and reinstall the four medium
Phillips bolts and their washers. Then reattach the rear-upper shroud with its
centered bolt and washer. Reassembly of the outer metal shroud is now finished!
The final reassembly task is to refit the enshrouded mechanism into the
plastic outer casing. Lay the inverted UPPER plastic half-shell on the
bench,with its front facing away from you.
Observe the small red or black wires tucked along the sides of the upper
plastic half-shell. With the metal enshrouded drive mechanism upside down, it
should be slid into the plastic top-shell, from its rear to its front. Check
that the red-black wires remain tucked along the inner edge between the plastic