Fault Remind Super Capacitor Power Led; Connector Board 12V Power Leds; Power Distribution Board 5V Power Led; V_Standby Ok Led - Sun Oracle Sun Fire X4270 M2 Service Manual

1.5.5.3

Fault Remind Super Capacitor Power LED

This LED is located next to the Fault Remind button and is powered from the super
capacitor that powers the fault LEDs on the motherboard. This LED lights to indicate
to the user that the fault remind circuitry is working properly in cases where no
components have failed and, as a result, none of the component fault LEDs
illuminate.
1.5.5.4

Connector Board 12V Power LEDs

The connector board has two LEDs (CR7 and CR8) that light green when +12 volts is
being applied to the connector board. These LEDs are located to the left of the fan
board connector on the connector board. For the location of the fan board connector,
see
TABLE 5-1
1.5.5.5

Power distribution Board 5V Power LED

The power distribution board (PDB) 5V power LED (CR0601) lights green when +5
volts is being applied to the PDB. This LED is located to the right of the motherboard
ribbon cable connector when viewing the PDB from the front of the server.
1.5.5.6

3.3V_STANDBY OK LED

The service instructions for all internal components require that all AC power be
removed from the power supplies prior to the server's top cover being removed. This
green LED is located on the motherboard near the rear of the server and it lights to
inform a service technician that the motherboard is receiving standby power from at
least one of the power supplies. This indicator is provided to help prevent service
actions on the server's internal components while the AC line-cords are installed and
power is being supplied to the server.
and .
FIGURE 5-9
Chapter 1 Sun Fire X4270 M2 Server Overview 1-15