Agilent Technologies 8564EC Service Manual page 148

8. Disconnect the following connectors which are attached to the inside
of the A1 front panel assembly:
a. INPUT 50 Ω RF connector. Use a 5/16-inch open-end wrench to
disconnect cable W41 from the front panel. Loosen the opposite
end of cable W41, which is connected to the attenuator.
b. RF OUT 50 Ω connector for Option 002 spectrum analyzers. Use a
5/16-inch wrench to disconnect cable W47 from the front panel.
c. 1ST LO OUTPUT connector. Disconnect cable W42 from A7J3
and from the front panel 1st LO OUTPUT connector.
To remove the 1st LO OUTPUT connector use a 5/16 socket and
thread pliers. Use the pliers to hold the 1st LO connector in place,
while loosening the connector inside the instrument with the
5/16-inch socket.
d. 1ST LO OUTPUT connector For Option 002 spectrum analyzers.
Disconnect W46 from the front panel.
e. IF INPUT connector. Disconnect W36 from the front panel.
9. Remove the following from the face of the front panel:
a. VOLUME knob. Use a 0.050 Allen wrench to remove the two
screws (3030-0007) that secure the volume knob to the face of the
front panel. If necessary, use a 5/16-inch nut driver to drill out the
nut which secures the VOLUME potentiometer assembly. Cover
the tip with heatshrink tubing or tape to avoid scratching the
enameled front panel.
b. CAL OUTPUT connector. Use a 9/16-inch nut driver to remove
the dress nut that holds the front panel CAL OUTPUT connector
to the front panel. If necessary, drill out the nut driver to fit over
the BNC connectors and cover the tip with heatshrink tubing or
tape to avoid scratching the enameled front panel.
10.Remove the front frame from the chassis of the instrument.
a. Remove the screw (0515-1227) that secures the top of the
attenuator to the inside of the front frame of the instrument.
b. Remove the three screws (0515-1101) that secure the A1 front
frame assembly to the bottom of the spectrum analyzer.
c. Remove the three screws (0515-1101) that secure the A1 front
frame assembly to the top of the spectrum analyzer.
d. Remove the A1 front frame assembly from the chassis.
Note that the line switch cable is still attached to the front frame. To
remove the line switch you must first remove the display driver and
LCD assembly. For instructions on removing the line switch, see
"Removal of the Line Switch from the Front Panel" on page
Chapter 4
Procedure 2. A1 Front Frame/A18 LCD
Assembly Replacement
183.
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