Bird Technologies 4412A - Manual (Page 28)

18
Meter Replacement
1. Remove back cover.
2. Loosen the two #8-32 nuts on the back of the meter that secure the meter leads.
3. Remove the leads.
4. Remove the two #10-32 oval head phillips screws that secure the meter
shock ring.
Note: These screws are located on each side of the meter housing
just opposite the meter.
5. Pull the meter out of the back of the housing.
6. Remove the meter retaining ring and shock mount.
7. Replace the meter by reversing the procedure above.
Note: Be sure to observe polarity when replacing the leads to the
meter, black to negative, etc.
Instrumentation Module Replacement
Note: The instrumentation module contains the line section and cir-
cuit board chassis as an integral part.
1. Loosen the set screw in the range switch knob by turning in a counterclock-
wise direction with a .050 allen wrench.
2. Pull the knob straight off.
3. Unsolder the leads from the connections on the top of the circuit board chassis.
Note: Take note of the color coding when unsoldering so the leads
can be reconnected to their original positions.
4. Remove the two oval head phillips screws located on the front face of the
unit on either side of the line section element port.
5. Pull the instrumentation module out of the back of the unit.
6. Replace the instrumentation module by reversal of the above procedure.
Note: Be sure to reconnect the wires to their original positions.
RF Connectors Replacement
1. Remove the four screws in the corners of the connector flange.
2. Pull the connector straight off carefully.
3. Replace the connector by reversing the procedure above.
Note: See Replacement Parts List for other available connectors.
CAUTION
If other than Female N type connectors are used, limit power and frequency to
the capabilities of the RF coaxial cable or connectors used. Damage to
connectors or errors in reading could result .