TM 11-6625-1633-45
(1) Loosen the high frequency stop screw locknut.
b. Replacement.
(1) Fasten one end of the spring to the hook and
(2) Remove the stop screw.
plate.
(2) Push the spring through the cavity in the block.
d. Replacement of High Frequency Travel Stop Screw.
(3) Stretch the spring away from the block and
(1) Rotate the center frequency selector handwheel
hook the end to the eye coupling on the yoke.
for a frequency indication of 1862 MHz.
4-11. Replacement of Coaxial Relay K4
(2) Insert the stop screw with lockwasher and
locknut until the screw is stopped by the carriage.
a. To
remove the coaxial
relay, proceed as
follows:
(3) Tighten the locknut.
(2) Remove the two screws holding the rf oscillator
4-10.
Replacement of Frequency Tracking
support tray closest to the front panel (fig. 3-3) and re-
Springs
move the tray.
(3) Unsolder and tag the leads to the relay coil.
The two frequency tracking springs are connected to the
yoke which drives the rf choke. To replace the springs,
(4) Remove the four mounting screws grouped
proceed as follows:
about RF OUTPUT jack J5 on the front panel and remove
the coaxial relay.
a. Removal.
b. Replace the relay as follows:
(1) Rotate the center frequency selector handwheel
for an indication of 1000 MHz.
(1) Mount the relay and install the four mounting
screws.
(2) Unhook one end of the spring from the yoke and
(2) Solder the leads to the relay coil.
push the spring out of the cavity block.
(3) Mount the tray and install the two screws.
(3) Unhook the other end of the spring from the
hook and plate.
Section II. ADJUSTMENT PROCEDURES
4-12. Test Equipment and Special Tools
Required for Adjustment
i.. Electronic Tool Kit TK-100/G.
4-13. Power Supply Voltage Adjustments
The following test equipment and special tools are re-
quired for adjustment of the signal generator.
a. Connect the test equipment input terminals be-
tween the test points indicated in the chart below. Use
the least sensitive scale range available prior to taking
measurements to avoid overloading the test equipment.
NOTE
All measurements and adjustments are
made with Differential Voltmeter ME202.
e. Frequency Meter TS-186/UP.
b. Connect the signal
generator to a
power source.
f. Modulation Meter, ME-57/U.
Set the POWER OFF toggle switch to the up position
g. Spectrum Analyzer TS-723D/U.
and allow the unit to warm up for 15 minutes.
4-5