TB 9-6625-2151-35
(10)Connect oscilloscope CH 1 to pin 4 of JU5 (fig. 1).
(11) Adjust R132 (fig. 1) for minimum ac signal on oscilloscope (R).
(12) Press ←, STEP UP, STEP DOWN, and → keys until TI right display indicates
1025 Hz.
(13) Connect oscilloscope CH 1 to TP7 (fig. 1).
(14) Adjust Rl80 (fig. 1) for minimum ac signal on oscilloscope (R).
(15) Move shorting bars to original position (JU5 shorting pins 1 to 16, 2 to 15, 3 to
14, and 4 to 13) (fig. 1).
11. Hold Circuit
a. Performance Check
(1) Connect equipment as shown in figure 2.
(2) Position controls as listed in (a) through (i) below:
(a)
Press DISPLAY key to select RCV.
(b)
Release NOR and REV pushbuttons (out).
Press SET UP TRMT 600 Ω and RCV 600 Ω pushbuttons.
(c)
(d)
Release SET UP TRMT DIAL pushbutton to (out).
(e)
Press SET UP RCV BRG pushbutton (in).
(f)
Release SET UP TRMT HOLD and RCV HOLD pushbuttons (out).
(g)
Press MEASUREMENT MEAS key to select LEVEL FREQUENCY.
