T.O. 35 C2-3-442-2
TM -07464A -35 TM 5-6115-457-34
placed on a drain board and allowed to cool
Remove potting from governor
to room temperature.
control unit by performing steps 2. through
2. Remove six screws (1) and lock
the governor printed wiring board assem-
bly to the extent necessary to accomplish
washers (2) holding panel (20) to cabinet
repair. Pay particular attention to the
3. Lift off panel and set across top
of cabinet at a slight angle to keep the
potentiometers out of the compound.
Exercise care not to apply excessive
heat to components when unsolder-
4. Place the complete unit in a
temperature controlled oven large enough
to allow air to circulate completely around
unit. Set oven temperature to 170F.
Clean all components with a clean
lint-free cloth moistened with an approved
cleaning solvent and dry thoroughly.
The flash point of the compound is
515F. Do not unpot the unit by
placing it on a hot plate type sur-
face or by using an open flame, as
high temperatures (hot spots )
a. Inspect electrical components and
printed wiring board in accordance with
could damage componentry.
b. Inspect wiring and electrical connec-
Melting usually occurs in eleven to
tors for damage.
5. To remove printed wiring board
assembly (21) from cabinet, use heavy
Repair printed wiring board in ac-
gloves and remove entire unit from oven,
being careful not to spill the wax from the
cabinet or allow wax to get on the panel or
precise governor control unit wiring har-
Use care in handling the hot wax
as it can cause severe injury to
6. Prior to making repairs, the
the precise governor printed wiring board.
printed wiring board assembly must be
Pay particular attention to the following.