TM 1-1520-238-MTF
2-41
PROCEDURE
TROUBLESHOOTING
REFERENCE
AFTER STARTING APU (CONT)
(1) MODE – As required.
(2) PLAY – As required.
(3) VIDEO – As required.
(4) VID RCD – Actuate. Verify tape
counter increases/decreases as
required for mode selected.
(5) VID RCD – Set as required for
flight.
*23. PNVS – Evaluate operation as required.
a. ACQ SEL switch – NVS FXD.
b. SIGHT SEL switch – NVS (turret
should slew to fixed forward).
c. SYM BRT control – Verify authority
through full range of travel. Set as
desired.
d. Symbology select switch – Actuate
through each mode. Verify
appropriate symbology display.
e. LEVEL and GAIN controls – Adjust
for optimum imagery as cooldown
progresses. Note any imagery
anomalies.
f. Polarity select switch – Actuate to
each polarity. Use as needed for
personal preference.
