TM 32-6625-022-24&P
Section VI. MAINTENANCE OF SWEEP SIGNAL GENERATOR SG-677/U
b. Moisten cloth or brush with trichloroethane to
2-9 CLEANING.
remove oil and grease.
c. Wipe dry with a lint-free, dry cloth.
WARNING
The fumes of trichloroethane are toxic. Provide
2-10 REMOVAL AND REPLACEMENT OF PRINTED
adequate ventilation whenever it is used. DO
CIRCUIT BOARDS (PCB). For removal and replacement
NOT USE NEAR HEAT OR OPEN FLAME.
of PCB, refer to figure 2-1.
Trichloroethane is not flammable, but explo-
sure of fumes to an open flame or hot metal
a. Insert index finger into finger hole and pull up. PCB
forms highly toxic phosgene gas.
will slide out of PCB chassis subassembly.
a. Use a dry, clean, lint-free cloth or brush to remove
b. Replace PCB by inserting into PCB guides. Push
dust and dirt.
down firmly to be sure PCB is properly seated.
