Bird Technologies 8578B150 Series - Manual (Page 26)

Bird 8578 Series RF Load Resistor
14
Cleaning the Instrument Housing and Panels
1. Remove loose dirt and grime, gently, using a soft clean cloth dampened
with a warm solution of mild detergent and water.
Note:
A vacuum can be used to clean the load if necessary.
2. Do one of the following:
•
For 8578A100 or A150 models -
a. Remove the 22 truss head screws from the right side panel.
•
For 8578B100 and 150 models -
a. Remove the 16 truss head screws from the right side panel.
b. Remove the 6 screws from the top and bottom panels securing the
side panel to the unit.
3. Remove the right side panel.
4. Clean off dust and lint.
5. Check under the ribs of the air intake grille (at the side) for dust collec-
tion. If there is a buildup, remove the grille and clean under the ribs.
Note:
Replace right side panel and screws.
Cleaning the Connector and Outside Surface
Note:
Use a soft, clean cloth dampened with mild detergent.
•
Wipe dust and dirt from the outside surface of the unit
Note:
This should be performed at regular intervals.
•
Check the condition of the RF coaxial connector.
Clean the RF input connector, If needed, use a self-drying contact cleaner that
leaves no residue.
Disassembling the Enclosure
As mentioned previously, the Model 8578A100, 8578B100, 8578A150, and
8578B150 RF Loads are field repairable.
Do one of the following:
•
For 8578A series units:
a. Remove and retain the 22 Truss head machine screws from the
right side panel
b. Remove the housing panel.
•
For 8578B series units:
a. Remove and retain the 16 Truss head machine screws from the
right side panel.
b. Remove and retain the 6 Truss head machine screws from the top
and bottom panels that secure the right side panel.
c. Remove the right side panel.
With the RF housing panel removed, the resistor assembly can be tested and
replaced if necessary.
WARNING
Disconnect from RF power sources and the AC line before any disassembly
or service. Otherwise, there is a potential for electrical shock.