Section VI
Paragraphs 6-25 to 6-28
Before loosening any of the five nuts on the top
of the assembly, unsolder the bottom connec-
tion on trimmer capacitor C1529 to prevent
undue stress on the glass envelope andpossible
breakage.
6-28. REPLACEMENT OF Z1502.
a. Reverse the procedure in paragraph 6-26, taking
care not to damage the slug as it is inserted into the
coil.
b. Couple the attenuat or to the collar on the assembly.
NOTE
A bushing, which supports the attenuator tube,
is adjusted at the factory for proper fit. Do
not adjust or reposition this bushing unless
the attenuator tube binds in the bushing due to
improper alignment of the bushing with the
collar on the Z1502 assembly. Should this
condition arise, reposition the bushing by
loosening the hexagon nut which secures the
bushing to the chassis. Correct the alignment
and secure the bushing.
Switch Rotor Positions
d. To gain access to parts, remove the four nuts
securing the shield to the assembly. If necessary,
remove the bakelite plates.
e. When replacing the assembly, reverse the above
procedure, again taking care not to damage the slugs
as they are reinserted into the coils.
-.
2
a. Uncouple and slide back the attenuator until it is
clear of the collar on Z1502.
3
4
Do not attempt removal of Z1502 until the at-
tenuator is well clear of the collar.
b. Remove the two nuts mounting Z1502 (accessible
from the slug rack side).
c. Gently pull assembly straight out, taking care not
to damage the slug as it is withdrawn from the coil.
1,2,3,4 Set screws securtng attenuator shaft coupler
5 Attenuator plunger drive rack
6,7 Collar set screws
6-27. DISASSEMBLY OF Z1502.
8 Mounting bushing set screws
9 Mechanical stop
a. Remove the four nuts securing the shield.
10 Spur gear
11,12 Spur gear shaft bushing
b. Remove top or bottom plates only if absolutely
necessary.
