TM 1-1520-240-10
4-1-24
Figure 4-1-10. Symbol Generator Test Mode
4-1-36. Programming Procedures.
NOTE
The programming procedure for the pilot and
copilot is identical except for the location of
controls on the CCU.
1. Select mode to be programmed (1N
through 4N). The first mode that will appear
is “1N” (Normal Mode 1).
2. P-PGM/CP-PGM/OPR switch — P-PGM or
CP-PGM.
3. ”PROG” blinking in display — Check. Verify
that a complete set of symbology is dis-
played and attitude reference symbol is
blinking. Verify “PGM” is displayed in the
HUD FAIL message location for the DU not
being programmed.
4. BIT/ACK switch — ACK to program the full
display or go to step 5 and select desired
symbols.
5. PGM SEL/NXT control — SEL to select
symbol. Selected symbol stops blinking. If
symbol is not desired, toggle switch to NXT
and the symbol will disappear.
NOTE
All symbols have been programmed when the
“PROG” annunciator is the only symbol flash-
ing.
6. BIT/ACK switch — ACK. (Hold switch to
ACK for one second.)
7. ”OK” displayed — Check. (”OK” will be
displayed for two seconds.)
NOTE
If programming is not accepted, “FAIL” will be
displayed. If a fail message is displayed, at-
tempt to reprogram the same mode, if fail re-
appears notify maintenance.
Declutter mode is recognized by flashing
ground speed indicator in lieu of attitude refer-
ence symbology.
