Installing An M120 Xenpak Module; Figure 85: Removing A M120 Xenpak Module - Juniper Networks Hardware Manual

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Arrange the cable in the cable management system to prevent it from dislodging or
5.
developing stress points. Secure the cable so that it is not supporting its own weight
as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in
the cable management system. Placing fasteners on the loop helps to maintain its
shape.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend
radius. An arc smaller than a few inches in diameter can damage the cable
and cause problems that are difficult to diagnose.
Unscrew the thumbscrews at the top and bottom of the XENPAK module.
6.
Slide the module out of the PIC and place it in the electrostatic bag or on the antistatic
7.
mat.

Figure 85: Removing a M120 XENPAK Module

Installing an M120 XENPAK Module

To install a replacement XENPAK module (see Figure 86 on page 173):
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis.
Verify that a rubber safety cap covers the XENPAK transceiver. Install one if necessary.
2.
Orient the XENPAK module so that the optical port faces out, and the transmit (TX)
3.
port is above the receive (RX) port (see Figure 86 on page 173).
Slide the XENPAK module into the slot.
4.
Tighten the thumbscrews at the top and bottom of the XENPAK module. Verify that
5.
the module is seated properly.
Chapter 14: Replacing M120 Hardware Components
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