(Paragraph S-S) .
Apply a liberal amount of lubriplate on both sur-
faces of the pressure roller activation plate around the two elongated
Apply lubriplate to the slide surfaces of the switch
Cleaning the record-reproduce-erase head, the capstan, capstan
pressure roller, and other surfaces not requiring disassembly of the
Cleaning internal parts, surfaces, air intake and exhaust screens,
etc., should be accomplished by the maintenance technician on a
scheduled routine basis and" each time the chassis is removed from the
case for maintenance or repair.
Remove loose dust and foreign material
using a soft bristled brush and an air hose.
Remove any grease or
grime from metal chassis, motor housings, and other mechanical parts
using a clean lint free cloth moistened with solvent (such as
GENERAL REPAIR TECHNIQUES.
Several precautions must be observed when repairing printed cir-
These items can be
ruined if care is not used.
a. REPAIRING PRINTED CIRCUIT BOARDS.
A printed circuit board is used to replace conventional wired-chassis
The board is made of in-
sulating material plated with a conducting pattern.
Overheating could loosen the plating
be careful to avoid overheating.
bond and fracture the plating or it could lower the dielectric constant
If a strip
Use solder with a low melting point such as 60/40 solder.