> For the complete documentation index, see [llms.txt](https://docs.gxc.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gxc.io/hw/5g/5g-fronthaul-multiplexer/fhm-hardware-installation-guide/applying-power.md).

# Applying Power

The following sections detail the installation of the field replaceable power supply units (PSU) and the connection to the AC Line to power the Onyx FHM.

{% hint style="danger" %}
**WARNING:** The AC Line of the Onyx FHM can present dangerous voltage. Contact with the line voltage can result in pain or injury.

1\. Verify that the chassis ground of the Onyx FHM is connected to an earth ground before connecting AC Power Cable to the Onyx FHM unit.

2\. Verify that the AC Line has a quality signal ground integrated with a circuit breaker prior to applying AC Line Power to the Onyx FHM.

3\. Ensure that line voltage is not present when plugging the AC Power Cable to the PSUs of the unit. Only plug units into AC Line voltage after they are connected to the Onyx FHM.
{% endhint %}

The PSUs are pre-installed in the Onyx FHM. The PSU is a hot swappable field replaceable unit (FRU) and can be replaced while the equipment is operating if the remaining (second) PSU is installed and in operation.

The following instructions detail how to install a new PSU field FRU in the Onyx FHM.

## PSU Replacement

{% hint style="danger" %}
**WARNING:** Shock hazard! For safety, disconnect power input cable from the power supply unit before servicing the equipment.
{% endhint %}

### PSU FRU Removal

{% stepper %}
{% step %}
Locate the release tab on the PSU FRU and press and hold the blue release tab to the right to unlock the PSU from the power bay.
{% endstep %}

{% step %}
While holding down the release tab, grip the PSU's handle and firmly pull it out of the power bay.

<p align="center"><strong>PSU FRU Removal</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FSzOxynLZZeRpScZdMGMF%2Fimage.png?alt=media&amp;token=39038f88-5d1c-4710-a4b4-5290a52fc9a1" alt=""><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}

### PSU FRU Installation

{% stepper %}
{% step %}
Align the new PSU with the empty power bay, ensuring the PSU’s power connector is in the correct orientation (see Figure 24).
{% endstep %}

{% step %}
Carefully slide the new PSU into the power bay and gently push until the front surface of the PSU is flush with the front surface of the case.
{% endstep %}

{% step %}
An audible click will be heard when the PSU is installed correctly. The PSU will not go in all the way if it is inserted in the wrong orientation.

{% hint style="warning" %}
**CAUTION:** If the insertion of the PSU results in either significant resistance or a hard stop, remove the PSU and inspect it for correct orientation and/or damage. If damage is found or insertion issues persist, contact your supplier for replacement of the PSU. Do not attempt to repair a damaged PSU.
{% endhint %}

<p align="center"><strong>PSU FRU Installation</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FKa7NI9xtjB6uwmv97mVd%2Fimage.png?alt=media&amp;token=24893ef5-50f4-4972-9040-1eb7bb5e6ea6" alt=""><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}

### Connection of AC Power

{% stepper %}
{% step %}
Ensure there is enough power available on the selected electrical circuit to supply the Onyx FHM. The maximum system power consumption is 188.22 watts with an input voltage of 100-240V AC. It is recommended to ensure that enough power is available from the power distribution system prior to installation.
{% endstep %}

{% step %}
The Onyx-FRU is designed to support 1 + 1 power redundancy. Ensure that both PSU FRUs have been properly installed before powering up the equipment.
{% endstep %}

{% step %}
Insert the AC PSU Cable Receptacle of 1 pc. of the included power cords into the AC PSU ensuring that it is fully inserted.
{% endstep %}

{% step %}
Insert the standard AC Plug into the desired AC outlet. If necessary, switch on power strip that PSU(s) are plugged into.
{% endstep %}

{% step %}
Verify that the power supply is operating. The LED on the PSU will illuminate Green designating normal operation.

<p align="center"><strong>Installing the AC Power Cord into the PSU FRU</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2F5kv0w83Z2lNl9JSmmXix%2Fimage.png?alt=media&amp;token=38a7058d-2590-4f54-93b2-febd9fd6eae7" alt="" width="491"><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}

## Verifying System Operation

### Front Panel LED

Verify successful boot up of Onyx FHM by checking the system LED Tree located on the front panel. When operating normally, the PWR, FAN, and SYS LEDs should all display green.

<p align="center"><strong>Onyx FHM Front Panel LED Tree — GNSS</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FzFEqhBYnY67klrU39CUb%2Fimage.png?alt=media&amp;token=88be8d2f-44e3-4915-9e70-8b890a67bb79" alt="" width="151"><figcaption></figcaption></figure>

<p align="center"><strong>Onyx FHM Front Panel LED — GNSS</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>GNSS is not configured.<br>NOTE: Need NOS to activate this feature.</td></tr><tr><td>Solid Green</td><td>GNSS is in normal state. Self-survey is complete.<br>NOTE: Need NOS to activate this feature.</td></tr><tr><td>Blinking Green</td><td>GNSS is in learning state. Self-survey is not completed.<br>NOTE: Need NOS to activate this feature.</td></tr><tr><td>Solid Yellow</td><td>Power up. GNSS is not tracking any satellite.<br>NOTE: Need NOS to activate this feature.</td></tr><tr><td>Blinking Yellow</td><td>GNSS Antenna is shorted to ground.<br>NOTE: Need NOS to activate this feature.</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — SYNC</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>System timing synchronization is disabled, or unit is in free-run mode.<br>NOTE: need NOS to activate this feature.</td></tr><tr><td>Solid Green</td><td>System timing core (1588 and SyncE) is synchronized to external timing source (ex: GNSS, 1PPS, PTP, BITS, etc.)<br>NOTE: need NOS to activate this feature</td></tr><tr><td>Blinking Green</td><td><p>System is synchronized in SyncE mode.</p><p>NOTE: need NOS to activate this feature.</p></td></tr><tr><td>Solid Yellow</td><td>System timing core is in acquiring state or holdover mode.</td></tr><tr><td>Blinking Yellow</td><td><p>System timing synchronization failed.</p><p>NOTE: need NOS to activate this feature.</p></td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — SYS</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>Reserved</td></tr><tr><td>Solid Green</td><td>System boot complete</td></tr><tr><td>Blinking Green</td><td>Reserved</td></tr><tr><td>Solid Yellow</td><td>Reserved</td></tr><tr><td>Blinking Yellow</td><td>System boot not complete</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — FAN</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>Reserved</td></tr><tr><td>Solid Green</td><td>All FAN Modules Operating Normally</td></tr><tr><td>Blinking Green</td><td>Reserved</td></tr><tr><td>Solid Yellow</td><td>Reserved</td></tr><tr><td>Blinking Yellow</td><td>One or more FAN module(s) have failed or no FAN module present</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — PWR</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>No power or in shutdown mode.</td></tr><tr><td>Solid Green</td><td>System power good &#x26; BMC is present &#x26; BMC power good</td></tr><tr><td>Solid Yellow</td><td>System power good &#x26; BMC is absent</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — ID</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>No Power</td></tr><tr><td>Blinking Blue</td><td>Beacon feature is enabled</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Front Panel LED — PSU FRU LED</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>No AC power input to this PSU.</td></tr><tr><td>Flashing Red</td><td>No DC power output from this PSU.</td></tr><tr><td>Flashing Green</td><td>DC present, only standby output on. Poor contact.</td></tr><tr><td>Green</td><td>PSU DC output ON and OK.</td></tr><tr><td>Red</td><td>PSU failure.</td></tr><tr><td>Alternating Flashing Green and Red</td><td>Warning. Working conditions are not satisfied. Please check the voltage, electric current, and temperature.</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Management Port LED — Left LED</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>1G no link</td></tr><tr><td>Solid Green</td><td>1G link-up</td></tr><tr><td>Blinking Green</td><td>1G TX/RX activity</td></tr></tbody></table>

<p align="center"><strong>Onyx FHM Management Port LED — Right LED</strong></p>

<table><thead><tr><th width="250">LED Condition</th><th>Equipment Status</th></tr></thead><tbody><tr><td>Off</td><td>No activity</td></tr><tr><td>Solid Amber</td><td>10M/100M link-up</td></tr><tr><td>Blinking Amber</td><td>10M/100M TX/RX activity</td></tr></tbody></table>

## Post Installation Steps

{% stepper %}
{% step %}
After installing the FHM, connect the RUs to it, starting with port 0.

Ensure all RUs are of the same model.

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FVaKRhdExkZ1ACERjaaOK%2Fimage.png?alt=media&amp;token=68e06372-9461-45ea-8cfb-88fc8e018301" alt="" width="563"><figcaption></figcaption></figure>
{% endstep %}

{% step %}
Onboard the FHM.

Refer to *5G Onyx Portal Operations Guide > Add FHM*.
{% endstep %}
{% endstepper %}


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