Shure LX4 Diversity Receiver
Service Procedures1725D1008 (BK)
turns before full clockwise rotation, or 13 mm (1/4-inch) below
the top of the can. Minimum inductance occurs when the core
is level with the top of the can.
Use care when turning the core to avoid locking it against the
pcb and causing it to break. Should this happen, the core can be
repaired either by removing the coil assembly and replacing it or
by drilling out the core and inserting a new one, after removing
any broken pieces that remain. Sometimes a broken core may
be removed using a metallic Allen wrench of the correct size.
For coils other than L108 and L208, “sharpness” of tuning
depends on the operating frequency within the frequency group.
At the upper and lower edges of the group, a distinct peak may
be difficult to observe. In this case, the core should be adjusted
for maximum inductance and remain there. At frequencies near
the high end of the group (where coils are adjusted to minimum
inductance), do not back cores beyond the point where they are
level with the top of the can. Only minimum change in induc-
tance occurs beyond this point.
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