TB 9-6625-2069-24
(g) LOL to 0 V.
(h) OUTPUT MODE to A SEP B.
(3) Set oscilloscope to display one complete cycle.
(4) Measure preshoot, overshoot, and ringing, using standard measurement
technique. If preshoot, overshoot, and ringing exceeds 5 percent of pulse amplitude 10 mV,
perform b below.
(5) Repeat (1) through (4) above for OUTPUT B (option 020).
b. Adjustments. Adjust R137 (fig. 1) until preshoot, overshoot, and ringing is
within 5 percent or less of pulse amplitude 10 mV (R).
15. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
NOTE
Test points for power supply are located at right rear inside
bottom of TI. To gain access to test points remove right side
cover plate (fig. 1).
NOTE
Isolate TI and test equipment from ground during following
checks.
CAUTION
Do not short between floating and fixed test points.
a. Performance Check
(1) Connect multimeter negative terminal to TI fixed ground ( ) and positive
terminal to +5 VFX (fig 1). If multimeter does not indicate between 4.99 and 5.01 V,
perform b (1) below.
(2) Move positive lead to +20 VFX (fig. 1). If multimeter does not indicate between
19.98 and 20.02 V, perform b (2) below.
(3) Move positive lead to -20 VFX (fig. 1).
If multimeter does not indicate
between -19.98 and -20.02 V, perform b (3) below.
(4) Disconnect both leads from setup.
(5) Connect multimeter negative terminal to float ground ( ) and positive terminal
to +20 VFL (fig. 1). If multimeter does not indicate between 19.98 and 20.02 V, perform
b (5) below.
(6) Move positive lead to -20 VFL (fig. 1).
If multimeter does not indicate
between -19.98 and -20.02 V, perform b (5) below.