TB 9-4920-359-24
NOTE
GEN/PMG VOLTS meter will deflect downwards before
increasing upwards to reflect input.
(2) Adjust power amplifier POWER AMPLIFIER GAIN control for a 115 V
indication on GEN/PMG VOLTS meter. Multimeter will indicate between 113 and 117 V ac.
(3) Adjust calibrator frequency for a 400 Hz indication on TI FREQUENCY meter.
(4) Calibrator will indicate between 396 and 404 Hz.
(5) Adjust power amplifier POWER AMPLIFIER GAIN control fully ccw.
(6) Set power amplifier OUTPUT VOLTAGE RANGE switch to 30 V.
GEN-T1 circuit breaker to out position.
(7) Pull 400
b. Adjustments. No adjustments can be made.
9. PMG Volts
a. Performance Check
(1) Remove connections at TI J1 pins A and S and reconnect (HI) to pin E and (LO)
to pin D.
(2) Pull PMG A‡, B‡, and C‡ circuit breakers to out positions and set GEN/PMG
VOLTS switch to A-B.
(3) Push PMG A‡ and B‡ circuit breakers to in positions.
(4) Set calibrator input frequency to 1200 Hz and adjust POWER AMPLIFIER
GAIN control for a 21 V indication on GEN/PMG VOLTS meter. Multimeter will indicate
between 20.6 and 21.4 V.
(5) Repeat technique of (4) above at GEN/PMG VOLTS meter indications listed in
table 3. Multimeter will indicate within limits specified.
(6) Adjust POWER AMPLIFIER GAIN control fully ccw and set calibrator to STBY.
(7) Pull PMG A‡ and B‡ circuit breakers to out positions.
Table 3. PMG Volts
Test instrument
GEN/PMG VOLTS
Multimeter indications (V ac)
meter indications
Min
Max
18
17.6
18.4
15
14.6
15.4
b. Adjustments. No adjustments can be made.
10. CT TEST CURRENT Meter
a. Performance Check
(1) Connect equipment as shown in figure 2.
(2) Position TI controls as listed in (a) through (d) below: