Appendix A: Connectors and LEDs
7750 SR-a4 and SR-a8 Installation Guide 141
Figure 46 shows the 7750 SR-a fan tray LEDs. Table 57 describes the LEDs.
Figure 46: 7750 SR-a Fan Tray LEDs
24568
7750 SR-a4 Fan Tray
Pwr
Stat
Slot Layout
1/1 XP
1/2
1/3 1/4
2/1 XP
1
2/2 XP
2/3 2/4
CPM A
2
CPM B
7750 SR-a4 Fan Tray
Pwr
Stat
Slot Layout
1/1 XP
1/2 XP
1/3 1/4
CPM A
1
CPM B
LED
LED
7750 SR-a8 7750 SR-a4
Table 57: 7750 SR-a Fan Tray LED Descriptions 
Label/Part Sub-
category
Description 
Pwr / Stat  Power 
LED
Blue (solid): During initial power up of the chassis, blue indicates that 
power to the fan tray is on. 
Unlit: There is no power to the fan tray or the power is faulty.
Status 
LED
Green (solid): The fan tray is operational and communicating with the 
CPM-a.
Amber (solid): A fault condition exists for the fan tray. An alarm is 
generated.