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Maintenance
6-24
1705A Spectrum Monitor
FRONT
J1
Remove these screws
to remove A3 Main bd.
Remove these screws
to remove 70MHZ T urner.
Remove this nut
to remove L-Band Turner.
Figure 6-11: Screws holding the Main board (A3) and the Tuners (A5 and A6) in
place
4. Remove the six screws that hold the cover on the 70 MHz tuner. (The cover
serves as a hold down for the L--Band tuner.)
5. Slide the tuner back and upward until the L--BAND INPUT connector is
clear of the rear panel.
1. Unsolder the three wires from the feed-through capacitors at the back of the
70 MHz tuner.
2. Unplug the coax connector from the rear of the 70 MHz tuner.
3. Remove the 70 MHz tuner cover. It is held on by six screws. See Fig-
ure 6-11.
4. Turn the 1705A on its left side (crt down) and remove the two screws that
secure the 70 MHz tuner to the main chassis.
5. Slide the tuner back and upward to remove.
6. Reverse the procedure to re-install the tuner.
1. Remove both tuners.
Removing the 70 MHz
Tuner
Removal and
Replacement of the Main
Board