Table 5-1. Troubleshooting (Con't)
TEST OR INSPECTION
SHELTER SYSTEM COMPONENTS (Con't)
e. Insert serviceable starter into socket and rotate clockwise until the starter locks.
f. Position lamp tube below socket receptacles with pins vertical. Insert lamp into sockets and twist
until pins lock.
g. Position the LIGHTS circuit breaker in the main power service box to on.
h. Using a suitable test meter and probe, check operation of ballast unit. If necessary, replace
defective lamp ballast as described in paragraph 20-2.
Section III. GENERAL MAINTENANCE
The instructions contained in this chapter are for the use
of direct and general support personnel responsible for
maintenance of the editorial and photomechanical
shelter unit of the special warfare printing plant.
5-7. General Maintenance Procedures.
Procedures for general repair and maintenance are
defined where they occur during the performance of
maintenance activity covered by the various sections
and paragraphs of this chapter. Maintenance procedures
for the items of equipment which form a part of the
shelter system are included in the various commercial
manuals supplied with the equipment. Refer to TB 750-
240 for maintenance and repair procedures pertaining to
the shelter itself.
Section IV. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS AND ASSEMBLIES
a. The electrically operated NuAr 18V plate- maker
is shock mounted and ready for operation when the
power cord is inserted into the applicable polarized wall
receptacle. The flip-top vacuum printer frame is used to
hold film securely against a sensitized plate while the
image on the film is being printed on the plate. The
vacuum for the flip-top printing frame is developed by a
b. Due to installation requirements, the blower unit,
used to ventilate the machine, which is normally
mounted on the external side of the rear panel, is now
located within the lower compartment. The method of
gaining access to the arc lamp mechanism is normally
obtained by removing the rear panel of the unit; this
method is impractical for this installation. To gain
access to the mercury vapor lamp mechanism, which is
located directly above lower compartment, position flip-
top frame in a vertical position to expose the lamp
reflector. Remove the lamp reflector within the unit to
replacement of vapor lamp tube.
The mercury vapor lamp should
not be operated above 110 of
rated voltage. Such operation
increases pressure within the
causing skin and eye irritation.