TB 9-6625-2295-24
d. Position controls as listed in (1) through (9) below:
(1) VERTICAL POSITION to midrange.
(2) CH 1 and CH 2 VOLTS/DIV switch to 100 mV and VAR controls to fully cw detent.
(3) A SEC/DIV switch to 100 Ps.
(4) SEC/DIV VAR control fully cw detent.
POSITION
(5)
control to midrange.
(6) TRIGGER LEVEL to midrange.
(7) TRIGGER HOLDOFF fully cw to detent.
(8) SCALE ILLUM fully ccw.
(9) INTENSITY, FOCUS, and READOUT INTENSITY controls for suitable viewing.
e. Allow at least 20 minutes for equipment warm-up.
17. Power Supply
a. Performance Check
(1) Press VERTICAL MODE pushbuttons CH 2, CH 3, and CH 4 to off.
(2) Connect multimeter HI to TI J119 (fig. 1) pin 4 and LO to chassis ground. If
multimeter does not indicate between +9.99 and +10.01 V DC, perform b below.
b. Adjustments. Adjust VOLT REF ADJ R1292 (fig. 2) until multimeter indicates
10.00 V DC (R).
18. DAC REF and Input Capacitance
a. Alignment
(1) Connect multimeter HI to J119 (fig. 1) pin 13 and LO to chassis ground.
(2) Press 't pushbutton for a 't display on CRT.
(3) Adjust ' control ccw until multimeter indication remains at a constant value
(approximately -1.25 V dc). Record indication.
(4) Adjust ' control cw until multimeter indication remains at a constant value
(approximately 1.25 V dc). Record indication.
(5) Add the absolute values of indications recorded in (3) and (4) above. If sum of
indications does not equal 2.500 V dc, adjust DAC REF R2010 (fig. 2) for 1.250 V dc or best
compromise on multimeter while repeating (3) and (4) above.
