TD140 Hardware Maintenance Guide 7.13.2
40
4
TD140 Maintenance Guidelines
Rev. 001-140228
shows the locations of the PEM front panel components mentioned in these steps.
Figure 4.6 - PEM Front Panel
Perform the following steps:
1.
Ensure that the redundant PEM is fully functional (its red Alarm LED is off).
2.
Push the hot swap button until the blue hot swap LED starts blinking.
3.
When the hot swap LED is solid blue, loosen both screws.
4.
Shut off power to the PEM to be removed by setting both fused switch branches
to OFF.
5.
Remove the terminal cover and disconnect the power cables from the power
terminal.
6.
Pull out the PEM and put it into an ESD shielding bag.
7.
Remove the replacement PEM from its ESD shielding bag and insert it into the
empty slot.
8.
Set both fused switch branches to ON.
The blue hot swap LED blinks until the PEM is fully functional. Only the red Alarm LED is lit
until power is provided to the PEM.
9.
Tighten the screws.
10.
Reconnect the power cables to the power terminal.
11.
Replace the terminal cover.
12.
Restore the facility’s power to the PEM.
Hot swap
ďƵƩŽŶ
Hot swap
LED (blue)
PEM Alarm
LED (red)
PEM OK
>;ŐƌĞĞŶͿ
Fused switch
ďƌĂŶĐŚϭ
Fused switch
ďƌĂŶĐŚϮ
Power
ƚĞƌŵŝŶĂů
Screw
Screw
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