Thales 421 - Page 150

LLZ/GP
Maintenance Operation and Maintenance
ILS 420
TEST DATA SHEET
6−10 Ed. 01.10SOAC
Test Data Sheet ECU: Control Logic 1 and 2, 3rd Shutdown Logic (with ECU −0001/−0002)
Test Item Jumper set Purpose Action Expected Result Passed Failed
Prerequisite:
Equipment in ’Normal’ con-
dition, both TX on, TX1 main
ECU
−0001/−0002
On LCP: Switch
key lock switch to
’LOCAL’.
− ’Monitor Bypass’ not set
− Status ’NORMAL’ *
ECU J8,J9,J10,J11:
1−2, 9−10
Park position
* If ’Maint. Generate LCP Warning’ in
LRCI Station configuration’ is set to
’yes’, the status is ’Warning’.
ECU Control logic 1
TX1
J8: 5−6, 7−8
J9: 5−6, 7−8
Disablecontr.
log. 2+3rd
shutd.logic:
control logic1
remains ena-
bled
Press LGA1 reset
until a station
alarm is induced
Check voltage at
J8/3 & J9/3: >4 V
− station shutdown (si)* or
− change over to TX2 (du)*
− ECU shows ’Switch Fail’
− Both totem poles are off
(1A/1B)
ECU Control logic 1
TX2
J10: 5−6, 7−8
J11: 5−6, 7−8
Disablecontr.
log. 2+3rd
shutd.logic:
control logic1
remains ena-
bled
Press LGA2 reset
until a station
alarm is induced
Check voltage at
J10/3 & J11/3:
>4 V
− station shutdown (dual)
− ECU shows ’Switch Fail’
− Both totem poles are off
(2A/2B)
ECU J8,J9,J10,J11:
1−2, 9−10
Park position − park jumper
− Reset ECU
TX1 and TX2 are on again;
TX1 is main
ECU Control logic 2
TX1
J8: 3−4, 7−8
J9: 3−4, 7−8
Disablecontr.
log. 1+3rd
shutd.logic:
control logic2
remains ena-
bled
Press LGA1 reset
until a station
alarm is induced
Check voltage at
J8/3 & J9/3: >4 V
− station shutdown (si) or
− change over to TX2 (du)
− ECU shows ’Switch Fail’
− Both totem poles are off
(1A/1B)
ECU Control logic 2
TX2
J10: 3−4, 7−8
J11: 3−4, 7−8
Disablecontr.
log. 1+3rd
shutd.logic:
control logic2
remains ena-
bled
Press LGA2 reset
until a station
alarm is induced
Check voltage at
J10/3 & J11/3:
>4 V
− station shutdown (dual)
− ECU shows ’Switch Fail’
− Both totem poles are off
(2A/2B)
ECU J8,J9,J10,J11:
1−2, 9−10
Park position − park jumper
− Reset ECU
TX1 and TX2 are on again;
TX1 is main
ECU 3rd Shutdown logic Disconnect cable
at connector J7
(upper) of SYN1.
Causes an executive alarm
condition.
NOTE: The next step will reboot the LCP. Due to missing communications from the LCP during the reboot time, the executive bypass, although asserted, is disabled for the 3rd
control logic. On the ECU, the flashing LED ’Exec. Bypass’ indicates this state. The 3rd shutdown control integrates the duration of an exec. alarm condition while it is
not bypassed. When this integration reaches 6 s, the control then suppresses the clock to the clock detector which triggers a complete station shutdown.
ECU 3rd Shutdown logic
(incl. Clock Detector)
On LCP, Issue a
’Reboot LCP’
command.
Check voltage at
J8/7, J9/7, J10/7
& J11/7: >4 V
− during LCP reboot, LED
’Exec. Bypass’ goes off
after 10 s, and on again
after 5 s until station
shutdown indicated by
ECU LED ’Exec.On’ and
’Stby On’ off
− ’3rdShutdown Path Off’ lit
− verifies 3rd shutd. logic
as cause of ’off’ condition
Reconnect cable
to J7 of SYN1.
Reset ECU. Clears the ECU.
Set equipment to ’Normal’
condition, both TX ON.
TX1 main.
Set LCP key
switch to
required mode.
Status ’Normal’, equipment is
in service again, no alarms or
alerts indicated.
For this test, 8 jumpers are used.
Date: Sign: * (si)= single, (du)= dual