Esm Board User Controls - IBM Netfinity EXP300 Installation And User Manual

Attention: The EXP300 comes with two power-supply/fan units installed.
When one power supply fails, the power-supply unit must be replaced to re-
establish redundancy. When replacing the failed unit with the new power
supply unit, ensure that this operation is performed in less than 10 minutes to
prevent any overheating.
The fan that is visible from the rear of the power supply is an auxiliary fan
that is normally off. This fan turns on only when the main fan within the
power supply fails.
Power on/off switch
Use this switch to turn the power supply on and off.
Fault LED (amber)
When completely lit, this amber fault LED indicates a power supply failure or
that a redundant power supply is not on. This LED also flashes when the
built-in fan fails.
DC power LED (green)
This green LED is lit when the expansion unit is turned on and is supplying
both 5 V and 12 V dc power.
AC power LED (green)
This green LED is lit when the expansion unit is receiving ac power.
Handles The two handles are used for installing and removing the power supply.

ESM board user controls

Two environmental services monitor (ESM) boards are accessible from the back of the
expansion unit. These components contain several user controls, indicators, and
connectors.
Termination-
LVD/SE
power
LED (green)
LED (green)
ESM board
Push pin
SCSI reset
LED (green)
ESM board The environmental services monitor (ESM) boards contain the SCSI
controls, LEDs, and connectors.
Fault LED (amber)
When lit, this amber LED indicates an ESM board failure.
SCSI reset LED
When lit, this green LED indicates a SCSI bus reset.
Termination-
SCSI Bus
power
connector 2
LED (green)
Push pin
Activity
LED (green)
SCSI reset
Fault
LED (green)
LED (amber)
SCSI Bus
connector 1
LVD/SE
LED (green)
Activity
LED (green)
Fault
LED (amber)
ESM board
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Chapter 1. Introduction