TM 55-4920-390-13&P
SECTION VII
ADJUSTMENT
7-1. GENERAL. This section provides procedures for the Strobex Blade Tracker, Model 135M-9.
7-2
ADJUSTMENT
7-3
ADJUSTMENT OF LAMP To adjust the hand-held lamp proceed as follows-
WARNING
a) High voltages are present. Use insulated screwdriver (tape shank) and avoid shorting lamp
clamp to housing.
b) The flash tube is pressurized and presents serious eye hazard. WEAR PROTECTIVE GLASSES.
c) The flash tube emits harmful ultra-violet radiation. AVOID LOOKING DIRECTLY AT SOURCE.
Refer to 5-2, a thru c and 5-2, h thru k, if focusing is required.
7-4. ADJUSTMENT OF OSCILLATOR Adjustment of
the internal (locking) oscillator is
accomplished as
follows-
NOTE
A frequency counter is required, Hewlett-Packard 5211B or equal.
a) Set "Vernier" on back of hand-held lamp to mid-range.
b) Set "Multi-turn Dial" on back of hand-held lamp to 350.
c) Connect counter to anode of SCR (Q12) (Test Point 2).
d) Apply 28 VDC to power cord and depress trigger on pistol grip handle of hand-held lamp, e) Reading should
be 1/350 X 10-4 or 28.6 Hz. or 1/dial reading X 10-4 +100/o.
f) If adjustment is required, it is accomplished by means of the small pot (R 46) located on circuit board near
SCR.
g) Check at other settings to check tracking with vernier centered, using the following table.
7-1