c. Connect high voltage tube clip (28) to small
end of replacement flash tube V1201 (29), Hold
the clip between the fore and middle fingers and
with the thumb, press small metal end of flash
tube into clip.
d. Use a screwdriver to spread tube clamp (41).
Hold metal end of flash tube with clamp attached
and push large end of tube into tube clamp. Slide
new tube into clamp the same distance as old
tube to facilitate focusing. If lamp has a trigger
wire, be sure it is passed between the contact
area of the tube clamp,
NOTE
If tube clamp has been spread so that
it no longer grabs the tube securely,
adjust clamp tension with pliers
(without tube in clamp).
e. Use a soft, clean, lint-free cloth to wipe flash
tube and reflector clean of fingerprints and dust.
f. Focus flash tube in accordance with
paragraph 4-29.
CAUTION
Thermal stress will cause the lens (26)
to break if nuts (27) are tightened
against case (55).
g. Install lens (26) with four nuts (27). Thighten
nuts and then turn back 1/4 turn.
h. Replace rear cover if removed.
4-29. Strobex Focus Adjustment (Fig. 3-8).
a. Remove rear cover (para 4-22a).
b. Connect Strobex to a +28 vdc power source.
c. Squeeze and hold trigger (fig 3-8) and project
beam on a dark surface, approximately 3 feet in
front of flash tube. Verify that a centered 4-inch
diameter spot is seen. Perform the following if, a
dark center appears, or if a small bright spot ap-
pears in a large light pattern:
(1) Use an insulated screwdriver to turn the
three nylon screws (fig 3-8) clockwise until the
correct indication is obtained.
TM 55-4920-402-13&P
(2) Use an insulated screwdriver to turn the
three nylon screws (fig 3-8) counterclockwise un-
til the correct indication is obtained.
d. Accomplish final focus by projecting beam
on a wall approximate y 15 to 20 feet away. Ad-
just the nylon screws to achieve a spot approx-
imately 1 to 2 feet in diameter. Release trigger.
e. Replace rear cover 4-27g).
4-30. Assembly of Tester (Fig. C-7).
NOTE
Refer to Tester schematic diagram (fig.
4-4) for connection of electrical leads.
a. If necessary, solder wires to two switches
(41) and push them through front panel (47) until
their clamps snap into place (Fig. C-7).
b. If necessary, solder wires to circuit card
assembly (34 through 10) and connector (30), In-
stall connector into front panel and circuit and
behind connector. Secure with six nuts (33), two
long screws (32), and two short screws (31). Note
that two of the nuts are used as spacers between
the connector and cidrcuit card.
c. If necessary, solder wires to Nidec motor (28)
and mount bottom part of the motor to base (25)
with two long metric screws (27) and two short
metric screws (26).
d. Assemble two springs (24), two accelerometer
arms (23), and four clamps (21 ) and secure them
together with eight screws (22).
e. Install the magnetic pickup bracket (19) onto
the top half of the Nidec motor (28) and secure
with four metric bolts (20). Mesh the two halves
of the motor together.
f. Install the two cam followers (17) onto the ac-
celerometer arms (23) and secure with four
screws (18).
g. Install the doubler (14) onto the magnetic
pickup bracket (19) and secure with four nuts (16)
and screws (15).
Change 4
4-16.9
