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Figure 142: Installing the Quiet Lower Front Fan Tray

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FA N T-F BOT -S

LOWER FANTR AY

Documentation

T640 Cooling System Description on page 31•

• Maintaining the T640 Fan Trays on page 445

• Troubleshooting the T640 Cooling System on page 469

• T640 Preventing Electrostatic Discharge Damage on page 506

Replacing the T640 Quiet Upper Front Fan Tray

The upper front fan tray is located above the FPC card cage. Each quiet front fan tray

weighs about 17.8 lb (8.1 kg). The fan trays are hot-insertable and hot-removable. The

quiet upper and lower fan trays are not interchangeable with each other. The quiet upper

front fan tray is labeled FAN-T-FTOP-S UPPER FANTRAY.

Removing the T640 Quiet Upper Front Fan Tray on page 302

Installing the T640 Quiet Upper Front Fan Tray on page 303

Removing the T640 Quiet Upper Front Fan Tray

To remove a quiet upper front fan tray (see Figure 143 on page 303):

1. Attach an electrostatic discharge (ESD) grounding strap to your wrist, and connect

the strap to one of the ESD points on the chassis.

2. Loosen the captive screws on the corners of the fan tray faceplate.

3. Grasp both sides of the fan tray, and pull the fan tray out of the chassis approximately

1 to 3 inches.

WARNING: To avoid injury, keep tools and your fingers away from the fans

asyou slide the fan tray out of the chassis. The fansmight still be spinning.

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