TB 9-6625-2295-35
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 s.
(4) SEC/DIV VAR control fully cw detent.
(5) ⇦POSITION⇨ 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.
a. Performance Check
(1) Press VERTICAL MODE pushbuttons CH 2, CH 3, and CH 4 to off.
(2) Connect digital multimeter HI to TI J119 (fig. 1) pin 4 and LO to chassis
ground. If digital 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
digital multimeter
indicates 10.00 V DC (R).
a. Alignment
(1) Connect digital 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 digital multimeter indication remains at a constant
value (approximately -1.25 V dc). Record indication.
(4) Adjust ∆ control cw until digital 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 RF R2010 (fig. 2) for 1.250 V dc or best
compromise on digital multimeter while repeating (3) and (4) above.