TB 9-4931-501-24
Figure 2. Power supply circuit board (bottom).
(3) POWER switch to on.
(4) GRAT ILLUM control as desired.
(5) READOUT INTENS control to midrange.
g. Allow approximately 15 minutes for the TI to warm up and stabilize.
8. Calibrator Output Voltage
a. Performance Check
(1) Press TI POWER switch to off and connect probe between the junction of R984
(2) Connect multimeter between TI CALIBRATOR current loop and GND TEST
POINT (fig. 2).
(3) Pull TI POWER switch to on.
(4) Multimeter should indicate between +396 and +404 mV dc.
(5) Vary autotransformer between 105 and 125 V ac and observe that multimeter
indication remains between +396 and +404 mV dc.
(6) Press TI POWER switch to off and disconnect probe and adapter connected in (1) above.
(7) Pull TI POWER switch to on.
(8) Connect CALIBRATOR loop to vertical amplifier channel 1 INPUT.
(9) Adjust INTENSITY control, vertical amplifier VOLTS/DIV switch, and time
base TIME/DIV switch as necessary to obtain a square wave display.