LLZ 421
Operation and Maintenance Operation
ILS 420
3−3Ed. 01.07
SOAC
3.3 CONTROLS AND INDICATORS ON THE SUBASSEMBLIES
See Fig. 3−2.
The controls and indications of individual subassemblies are shown in Fig. 3−2.
Board Indicator Color Control Function of control or indicator (lit or flashing)
LG−A CPU_NORM
Audio_On
green
green
Reset
Load/Boot
flashing slowly (1 Hz) board ok
off board faulty or TX shutdown
lit TX on, generating nav. signals
flashing slowly TX off, not generating signals
flashing fast program state faulty
off TX shutdown
performs a reset of the processor board
Used with Reset, to prepare the board for
software load procedure, both LED are lit.
During load procedure both LED are flashing.
LG−M CPU_NORM
Audio_On
green
green
Reset
Load/Boot
lit monitor program stopped
flashing slowly (1 Hz) board ok, monitor runs
off board faulty or TX shutdown
lit TX on
flashing normal operation, indic. meas-
urement chain repetition rate
flashing fast program state faulty
off monitor is not operating or TX
shutdown
performs a reset of the processor board
Used with Reset, to prepare the board for
software load procedure, both LED are lit.
During load procedure both LED are flashing.
ECU LED indicators
top down green
yellow
red
red
green
yellow
red
red
yellow
red
red
green
red
red
red
Lit if:
Executive TX on
Executive Monitor bypass on
Executive Alarm Monitor 1
Executive Alarm Monitor 2
Standby TX on
Standby Monitor bypass on
Standby Alarm Monitor 1
Standby Alarm Monitor 2
Field monitor bypass on
Field Alarm Monitor 1
Field Alarm Monitor 2
Equipment 1 Executive
3rd redundant detection path off; safety shutd.
Integrity fail:integritytest of monitors has failed
Switch fail: switching action failed
(flashing: missing subassemblies/HW)
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