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INST LT
LIGHT OFF
GR
N
DIM
BRT
POS
ANTI
COLL
WHT
DIM BRT
FLOOD LT
OFF OFF OFF OFF
OFF
PITOT
HTR
HTR L DEFOG
BLWR
R DEFOG
BLWR
AUTO
COMPT
BLWR
IR JAMMER OFF OFF OFF
XMTR CARGO
HOOK
FUEL
BOOST
ENG
ANTI
ICE
AUTO
ENG OIL
BYPASS
START OFF RESET
OFF OFF
PREHEAT
RUN
ESNTL BUS
AC GEN DC GEN BATT 2 BATT 1
1/2
20 5
L DIGT ANLG BOOST
HF FM FM VHF UHF ISP
AMP 2
SCTY IFF
RADAR BLWR CABIN
HF FM1 FM2 CMPTR
10 5 5 5
5 5 5 5 5 5
5 5 5
5 5 5 15 5
ATHS ARMT PWR
CONTR SIGHT L GUN RKT ATAS
HELLFIRE
ARM CONTR PWR AC
TAMS
15 10 30 2 1
HDG EL 26 VAC
26 VAC HOLD LT PWR
2 2 1
SCAS STBY MCPU PART SEP
26 VAC ATT BLWR BLWR
DC
PWR
DC
CONTR
26 VAC AC
2 1 1 5
1 5 10
DETR WARN ALT COMPT DEFOG HTR
20
AFT
FORWARD
OVERHEAD CONSOLE PANELS
CENTER POST
CIRCUIT BREAKER PANEL
NOTE
XMSN ROTOR
BATT VIDEO
CHGR RCDR
PLT CPO
1
BRIGHT
15
MMS
IDM
5
OFF
IGN
OFF
5 5
VHF
FADEC
UHF
DATA
XFER
ENG
ANTI
ICE
406075-594
J1047
10 5
OFF
ON
EGI
1
1
1
1
1 1
Figure 2-8. Overhead Console Panels and Center Post Circuit Breaker Panel
2-17
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
1. Labeled keys:
a. IFF Displays page 1 of IFF pages on CPG MFD.
b. TUNE Initiates the HF radio’s self tune mode.
c. SCAN (CDS2/CDS3) Alternately initiates and terminates scanning of HF radio
frequencies. Pressing SCAN and “4” key activates/deactivates HF scan.
(CDS3) Alternately initiates and terminates scanning of FM-1 and FM-2
radio frequencies. Pressing SCAN and “1” key activates/deactivates
FM-1 scan and “5” FM-2 scan.
(CDS4) SCAN button has no function in CDS4.
d. IDNT Broadcasts identification from IFF computer.
e. Blank Enters degree, minute, and decimal point symbols in LAT/LON mode of
navigation.
Figure 2-9. Multifunction Keyboard (Sheet 1 of 3)
2-18
TM 1-1520-248-10
CONTROL/INDICATOR FUNCTION
2. ZERO CODE switch Clears (zeroizes) all crypto variables in KY-58, KY-75, EGI and KIT-1C
IFF. Waypoint and target coordinates, communication radio frequencies,
navigation flight plan, and all other data are cleared from master
controller processor unit (MCPU) except transmission attitude
measurement system (TAMS), airborne calibration constraints, (CDS2)
ATHS/ IDM, engine condition data, and present position.
NOTE
Following completion of ZEROIZE, it may be necessary to cycle both right and
left MCPU circuit breakers to regain proper MCPU function.
(CDS4) ZERO CODE Causes a zeroize command to be sent to following subsystems: VHF
switch radio, UHF radio, FM-1 radio, FM-2 radio, KY-58 (No. 1 & 2), IDM, Data
Transfer Module, and nonvolatile memory (NVM). Emergency radio
frequencies are not cleared when ZERO switch engaged.
Zeroize status is displayed at top of current MFD display in a box on left
side of screen to right of L-3 and L-4 keys. Status display will be one of
following:
1. If current status is NOT COMMANDED, nothing will be displayed.
2. If zeroize is in progress, ZERO IN PROGRESS (boxed) is displayed.
3. If zeroize is complete, ZERO CMPLT CYCLE CDS PWR (boxed) is
displayed.
NOTE
To ensure proper system operation, power must be cycled to both MCPUs
following a zeroize.
3. REC/ACK switch Three-position (spring-loaded to center) switch. When placed in the ACK
(acknowledge) position one time, the warning system audio is silenced
and CAUTION is deleted from screen. Placing to ACK position a second
time deletes any caution or advisory messages that are displayed.
Pressing the switch to the REC position will return any stored caution or
advisory messages to the display, up to a total of five cautions and
advisories. If more than five messages are active at one time, only five
messages will be displayed plus a note of how many more messages
are yet to be displayed. Sequential activation of the REC switch will
recall the next five messages until all messages have been displayed. A
final activation of the REC switch will clear the remaining messages
from the screen.
Figure 2-9. Multifunction Keyboard (Sheet 2 of 3)
2-19
　
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