156 Chapter3
Assembly Replacement
Procedure 2A. A1 Front Frame/A18 LCD (8560EC)
while tightening the connector inside the instrument with the
5/16-inch socket.
d. 1ST LO OUTPUT connector for Option 002 spectrum analyzers.
Connect W46 from the front panel.
e. IF INPUT connector. Connect W36 from the front panel.
6. Replace the following from the face of the front panel:
a. VOLUME knob and potentiometer. Use a 5/16-inch nut driver to
secure the VOLUME potentiometer assembly. Use a 0.050 Allen
wrench to replace the two screws (3030-0007) that secure the
volume knob to the face of the front panel.
b. CAL OUTPUT connector. Replace the dress nut that holds the
CAL OUTPUT connector to the front panel.
7. If the line switch has been disconnected from the power supply you
will have to route the W3 line switch cable from the right side of the
instrument, through the opening behind FL 1, to the power supply
on the left side of the instrument.
a. Loosen the two screws (0515-2332) that secure FL 1 to the
instrument’s chassis.
b. Route the W3 line switch cable from the right side of the
instrument to the left side, through the opening that can now be
accessed, since FL 1 has been loosened. If the opening is still
tight, loosen or remove FL 1 using a 5/16 -inch wrench.
c. Secure the W3 line switch cable to the instrument chassis by
routing it through the white collar, that is adjacent to the power
supply assembly, on the chassis of the instrument.
d. Route the W3 line switch cable through the notched opening on
the right side of the power supply, and insert the line switch
connector into A6J2.
If the line switch has been disconnected from the front panel, see the
instructions for its replacement on page 159.
8. Replace the power supply cover by inserting the 3 screws
(0515-2309) that secure the power supply cover to the power supply.
9. If the LCD assemblies have not been removed from the front panel
assembly, you will need to reconnect the following cables, which are
routed through openings in the display driver shield.
a. W60, the large ribbon cable (80 lines) that goes to J8 on the A2
controller board.
b. W61, a coax cable that connects to J10 on the A2 controller board.
c. W64, the VGA ribbon cable (10 lines), that goes to J1 on the rear
panel.
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