1
Slide the FSU-796 List 4 into the COT shelf "MAINT UNIT" slot (see the illustration below) until the
retaining latch on the front panel locks into position.
2
Verify that the -48 CO LED is on. If the -48 CO LED is not on:
•
verify that frame ground and CO battery are connected (refer to local practices).
•
verify that the fuses are installed in the equipment bay fuse panel.
•
replace the FSU-796 streaker card.
3
Press the LED Test switch and verify that all PGTC interface and alarm LEDs are on. Replace the FSU-796
if any of the LEDs do not light.
.
1
From the MDF, connect a jumper lead from frame ground to the appropriate PGTC or alarm connector
termination on the MDF (refer to Table 1 and Table 2 for PGTC and alarm connector pinouts). Verify that
the corresponding PGTC interface or alarm status LED on the FSU-796 is on.
•
If the correct PGTC interface or alarm LED lights, proceed to the next connector termination.
•
If the PGTC interface or alarm LED under test does not light, or if the wrong LED lights, check the
wiring to the COT shelf.
2
Repeat the previous step for each PGTC interface and alarm LED connector termination.
The COT shelf power must be connected to provide -48V to the FSU-796.
Installing and Testing the FSU-796 List 4
MAINT UNIT slot
PG-Flex FSU-796 List 4 Slot Location
Testing the MAINT UNIT Slot Wiring
Table 1. PGTC Interface Connector Pinouts
Pin
Signal
Pin
Signal
1
PGTC_RING1
26
PGTC_TIP1
2
PGTC_RING2
27
PGTC_TIP2
3
PGTC_RING3
28
PGTC_TIP3
4
PGTC_RING4
29
PGTC_TIP4
5
SLEEVE2
30
SLEEVE1
6
SLEEVE4
31
SLEEVE3
7
OH2
32
OH1
8
OH4
33
OH3
9
PROCEED2
34
PROCEED1
10
PROCEED4
35
PROCEED3
11
LOCK2
36
LOCK1
12
LOCK4
37
LOCK3
17
TMAJ
42
TSTALM
22
SEZBY
47
SEIZE
Table 2. Alarm Wire-Wrap Terminations
Relay
NO*
COM*
NC*
SHELF_ID
1
2
3
MAJ_AUD
4
5
6
MAJ_VIS
7
8
9
MIN_AUD
10
11
12
MIN_VIS
13
14
15
* For the relay contacts, NO is normally opened, NC is normally closed,
and COM is common.
