TB 9-6625-151-40
Figure 4. Time on Function Test.
(9) Set TI switches as listed in (a) through (e) below:
(a) S4 to M439.
(b) S6 to 19 Tube.
(c) S5 to Chassis Ground (down).
(d) SW1 Tube Select switch to position 1.
(e) Connect power cord to source and set S1 to on position.
(10) Apply 24 V dc and -12 V dc to CALIBRATION AMPLIFIER and set SW1 to on.
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