Icom IC-R8500 - Page 7

•
CR-293 HIGH
STABILITY
CRYSTAL UNIT
©
Remove the bottom
cover
as
shown in the previous
page.
@
Unscrew
6
screws as shown in the
diagram, then remove
the
shield plate and PLL
cover.
®
Unscrew 1
0
screws
from the PLL
unit
then open the unit to
expose the bottom.
®
Unsolder the feet
of
the
internal crystal unit, then remove it.
<f)
Place the
CR'293
in the
space
available as
shown
iq
the
diagram, then solder its
feet into place
(6
points).
®
Adjust the reference
frequency using a
frequency counter.
Ground
spring
n n 63
0
Replace the ground
spring
to
its original position.
®
Return the PLL
cover, shield plate and bottom cover
to
their
original positions.
I
NOTE: The CR-293 is
an oven-type crystal unit, and
the specified frequency
stability described above is
guaranteed 1
min.
after power
ON.
3'2