Procedure 2. Al Front Frame/Al8 CRT

4 P L A C E S

w 4 7 ( O P T 0 0 2 )

W46

( O P T 0 0 2 )

1

/ ,W42

( S T A N D A R D )

\

\

I

5J15

Figure 3-3. A9, A18, and Line-Switch Assembly Mounting Screws

16.Remove screw (2) securing the A9 Input Attenuator Assembly to the center support on the front frame. See Figure 3-3.

17.Use a 5/16-inch open-end wrench to disconnect W41 from the front-panel INPUT 50R connector. Loosen the opposite end of W41.

18.For Option 002 analyzers: use a 5/16-inch open-end wrench to disconnect W47 from the front-panel RF OUT 50R connector.

19.Disconnect W42 from A7J3 and the front-panel 1ST LO OUTPUT connector. For Option 002 analyzers: disconnect W46 from the front-panel 1ST LO OUTPUT connector.

20.Disconnect W36, coax 86, from the front-panel IF INPUT connector.

21.Remove the VOLUME knob and potentiometer from the front panel. If necessary, drill out the nut driver used to remove the VOLUME potentiometer and cover the tip with heatshrink tubing or tape to avoid scratching the enameled front panel.

3-6 Assembly Replacement