Nortel Passport 241-5101-200, Installation Manual

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Appendix A Replacing hardware 49
Passport 8250 Installation Guide R2.2
Passport 8250 board guidelines
Use caution when handling, storing, and transporting circuit boards. Follow
these guidelines:
• Do not stack or store boards without first replacing them in their
antistatic material and shipping material.
• Do not to damage any parts when inserting the boards into packages.
• Do not store boards in areas where the relative humidity can exceed 85
percent or temperature can exceed 70 C.
• Handle boards by the faceplate. Do not touch electrical connections,
pins, and soldered surfaces.
• Do not handle boards unless you are using appropriate antistatic
protections such as an antistatic wrist strap. It is recommended that you
use conductive carpet, conductive shoes, or heel grounders.
Replacing the fan module
If the fan module malfunctions, contact your Nortel Networks representative
to order a new fan module.
1 For each power supply module, turn the power supply breaker to off.
2
Loosen the two securing screws on the fan module.
3 Slide the fan tray out of the fan module slot.
WARNING
Rotating fan
Do not touch the fans immediately after removing the fan
tray. The fans may continue to rotate several seconds after
being removed.
Breaker is off