TB 9-4931-217-40
Figure 6. Model 865A - rear internal view.
32. Ac Generator
a. Performance Check
control fully cw.
(2) Connect multimeter and frequency counter to TI GENERATOR AC OUTPUT
terminals 1 and 2.
(3) Set GENERATOR ON/OFF switch to ON. If multimeter does not indicate at
least 6 V ac, perform b (1) below. If frequency counter does not indicate between 990 and
1,010 Hz (hertz), perform b (2) below.
b. Adjustments (fig. 6)
(1) Adjust R6 for a 6 V ac indication on multimeter (R).
(2) Adjust C6 for a 1 kHz indication on frequency counter (R).
33. Ac Balance
a. Performance Check
(1) Press ON/OFF pushbutton to OFF and adjust DETECTOR SENSITIVITY
control to midrange.