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Replace Power Supply Units on the SRX4120

Maintaining the SRX4120 includes removing and installing the power supply units.

Power supply units (PSUs) in the SRX4120 are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace the PSUs without powering off the SRX4120 or disrupting the device functions.

Ensure that you have the following parts and tools:

  • An electrostatic discharge (ESD) grounding strap

  • An antistatic bag or an antistatic mat

  • A replacement PSU

  • A blank cover panel (in case you're not replacing the PSU)

  • A number 2 Philips screwdriver

Ensure that you understand how to prevent electrostatic discharge (ESD) damage.

Remove Power Supply Units from the SRX4120

Remove the JPSU-450W-AC from the SRX4120

CAUTION:

Avoid leaving the PSU slot empty for more than 30 minutes when the device is operational. For proper airflow, you must place the PSU in the chassis. Always cover the empty PSU slot with a blank panel.

To remove the JPSU-450W-AC from the SRX4120:

  1. If the AC power source outlet has a power switch, set it to the off (0) position.
  2. Pull out the power cord connected to the power source outlet.
  3. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  4. Wrap and fasten one end of the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to the ESD point on the chassis.
  5. Unplug the power cord from the device inlet on the PSU.
  6. Press the latch, which is on the right side of the power outlet, to the left.
  7. Pull the PSU straight out of the chassis.
  8. Place the PSU in the antistatic bag or on the antistatic mat.
  9. If you're not replacing the PSU, install the cover panel over the PSU slot.

Remove the JPSU-650W-DC-AFO from the SRX4120

CAUTION:

Avoid leaving the PSU slot empty for more than 30 minutes when the device is operational. For proper airflow, you must place the PSU in the chassis. Always cover the empty PSU slot with a blank panel.

To remove the JPSU-650W-DC-AFO from the SRX4120:

  1. Wrap and fasten one end of the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to the ESD point on the chassis.
  2. Place the antistatic bag or the antistatic mat on a flat, stable surface.
  3. Switch off the external circuit breakers for all cables connected to the PSU. Ensure that the voltage across the power source cable leads is 0 V. You must ensure that the cables do not become active during the removal process.
  4. Remove the clear plastic cover protecting the terminal studs from the faceplate.
  5. Remove the screws and washers from the terminals using a number 2 Phillips screwdriver.
  6. Remove the cable terminals from the terminal studs. Carefully move the power cables out of the way.
  7. Press the latch, which is on the right side of the power outlet, to the left.
  8. Pull the PSU straight out of the chassis.
  9. Place the PSU in the antistatic bag or on the antistatic mat.
  10. If you are not replacing the PSU, install the cover panel over the PSU slot.

Install Power Supply Units in the SRX4120

Install the JPSU-450W-AC in the SRX4120

To install the JPSU-450W-AC in the SRX4120:

  1. Wrap and fasten one end of the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to the ESD point on the chassis.
  2. If the PSU slot has a cover panel on it, remove the cover panel. Save the cover panel for subsequent use.
  3. Taking care not to touch the pins, leads, or solder connections on the PSU, remove the PSU from the bag.
  4. Using both hands, place the PSU in the PSU slot. Slide the PSU straight into the chassis until the PSU is fully seated in the chassis slot. Ensure that the PSU faceplate is flush with the adjacent PSU faceplate.
  5. Connect the power cord.

Install the JPSU-650W-DC-AFO in the SRX4120

To install the JPSU-650W-DC-AFO in the SRX4120:

  1. Wrap and fasten one end of the electrostatic discharge (ESD) grounding strap to your bare wrist and connect the other end of the strap to the ESD point on the chassis.
  2. Switch off the circuit breaker on the panel board that services the DC circuit. Tape the handle of the circuit breaker in the OFF position. Ensure that the voltage across the power source cable leads is 0 V. You must ensure that the cables do not become active during the removal process.
  3. If the PSU slot has a cover panel on it, remove the cover panel. Save the cover panel for subsequent use.
  4. Taking care not to touch the terminals, leads, or solder connections on the PSU, remove the PSU from the bag.
  5. Using both hands, place the PSU in the PSU slot. Slide the PSU straight into the chassis until the PSU is fully seated in the chassis slot. Ensure that the PSU faceplate is flush with the adjacent PSU faceplate.
  6. Connect the power cables.