TB 9-4935-552-50-2
NOTE
Do not allow lens barrel to touch lamp envelope during or after
focus adjustments.
(3) Energize TI and rotate the focus ring to obtain optimum filament focus.
Filament image should be defined clearly enough to be readable within 1/2 reticle division.
(4) If the image is within tolerance, deenergize the TI. Tighten the focus lock screw.
Energize the TI.
(5) Proceed to step 8h.
b. Bore-sight Alignment
(1) Using asbestos glove B3, carefully reseat lamp in socket, figure 6, until image is
centered to within 2 reticle divisions upon 180 degree image rotation.
(2) Proceed to step 8g.
c. Intensity Adjustment
(1) Remove the right side plug from TI.
(2) Attempt to adjust potentiometer inside TI to produce a TRD indication between
1.96 and 2.04 VPP.
(3) If the potentiometer cannot be adjusted to give an indication between 1.89 and
2.11 VPP, annotate and affix DA Form 2417.
(4) If in tolerance, proceed to 9h.
SECTION V
PRELIMINARY OPERATIONS: IR PROBE
11. Preliminary Instructions
a. Personnel should become familiar with the entire bulletin before beginning the
NOTE
Some of the following steps will
have
already
been
accomplished if an ITS was calibrated.
12