used near heat or open flame; the products of decom-
position are toxic and irritating. Since trichloro-
trifluoroethane dissolves natural oils, prolonged
contact with skin should be avoided. When necessary,
use heavy duty rubber gloves (item 8, App. D) that the
solvent cannot penetrate. If the solvent is taken
internally, consult a physician immediately.
Remove old adhesive using a cloth dampened (not wet) with
trichlorotrifluoroethane (item 19, App. D).
(3) Cover shield gasket removal.
Remove top or bottom cover in accordance with paragraph
(b) Remove 20 rivets securing shield gasket (4B) and plate
(4C) to top or bottom cover (2 or 3) in accordance with
(4) Externally relieved screw removal.
(a) Remove top or bottom access cover in accordance with
(b) Remove a sufficient number of rivets surrounding the area
where defective externally relieved screw (1) is located.
(c) Pull shield gasket (4B) away from plate (4C) a sufficient
amount to gain access to defective screw, then use pair of
small bolt cutters to cut off screw head, and remove
washer and defective screw.
(5) Thermostat switch (S1) removal.
(a) Remove top cover (2) in accordance with paragraph 6-8a(1).
(b) Remove two screws (9B) and four washers (9C) that secure
thermostat switch S1 (9D) to heatsink (12).
(c) Pull heatshrink tubing away from terminals; then tag and
unsolder wires from switch (9D) and remove switch.
(6) Holddown hook removal. Remove two screws (5), lock washers
(6), and flat washers (7) that secure holddown hook (8) to
front panel (9) and remove holddown hook.
(a) Remove top and bottom covers (2 and 3) in accordance with
(b) Make a sketch of the top of the module (10) and identify
pins and related wires (some modules do not have pin
(c) Tag and unsolder all electrical connections from the
module (10) .
(d) Turn the chassis bottom side up and remove four screws
(11) that secure power supply module (10) to heatsink