Memory, Variable, and Vertical Position Balance.

TB 11-6625-2734-50

Figure 2. Adjustment locations - vertical and horizontal cards.

(3) Adjust C275 (fig. 2) to place first dot above

(1) Depress oscilloscope (A3) left vertical mode

0-percent level at 90 percent level (4.5 divisions above 0

switch and connect probe (B9) to vertical amplifier (A8)

percent level) as shown in figure 3.

CH1 input.

(2) Turn vertical amplifier VOLTS/DIV switch to

10 mV and set AC-GND-DC switch to GND.

(3) Adjust vertical amplifier position control to

center trace on oscilloscope crt and set AC-GND-DC

switch to DC.

(4) Connect probe tip to TI OFFSET OUT jack

and adjust DC-OFFSET control to center trace on

oscilloscope crt. Do not move DC OFFSET control

during the remainder of this check.

(5) Connect probe tip to TI VERT SIG OUT

jack. If trace is not centered on oscilloscope crt, perform

b(1) below.

(6) Depress oscilloscope right vertical mode

switch and turn mV/DIV VARIABLE control throughout

its range. If trace on oscilloscope crt shifts, perform b(2)

below.

(7) Turn TI mV/DIV VARIABLE control to CAL

Figure 3. Waveform for R390 and C275 adjustments.

IN. If trace is not centered on oscilloscope crt, perform

b(3) below.

9. Memory, Variable, and Vertical Position Balance.

b. Adjustments.

a. Performance Check.

(1) Adjust R245 (fig. 2) until trace is centered on

oscilloscope crt.