EXFO QA-805 - Manual (Page 42)

Maintenance
34 QA-805 and W2CM Interface Module
Fan Tray Replacing
To replace the ATCA card cage air filter, perform the following:
1. Slowly remove the right fan tray.
2. Remove the screws from the filter on the fan tray.
3. Remove the filter from the card cage.
4. Remove the dust from the fan tray with a soft brush.
5. Insert a new filter in the frame and screw it on the fan tray.
6. Insert the fan tray in the system.
To replace the AC power supplies filter, perform the following:
1. Remove the front panel covering the power supply slots.
2. Carefully and slowly remove the old filter.
3. Install a new filter.
4. Replace the front panel.
The old air filter can be cleaned with a vacuum cleaner but this is not
recommended since the filter will never regain its original properties after
cleaning.
Fan Tray Replacing
Fan trays should be replaced due to wear and tear. The malfunction of a
fan tray will be reported via the shelf manager (fan tachometer sensors). In
case of failure, immediately replace the faulty fan tray, otherwise the
degradation in cooling performance may cause overheating of the ATCA
blades. For further details, see Fan Tray on page 9.
Power Supply Replacing
A power supply should be replaced in case of failure. The malfunction of
the power supply will be reported via the shelf manager (Power OK
sensor), the red LED at the front of power supply and additionally via the
front panel LED.