Icom IC-821H Instruction Manual page 55

Wi UT-102 Voice SYNTHESIZER UNIT
The UT-102 announces the accessed band's fre-
quency, mode, etc. in a clear, electronically-
generated voice, in English (or Japanese).
@ Remove both the top and bottom covers. (p. 50)
D Remove the protective paper attached to the
bottom of the UT-102 to expose the adhesive
strip.
@) Plug UT-102 to J25 on the MAIN unit as shown
at right.
@ Adjust R469 to set the speech level if desired.
©) After installing the unit, replace the top and
bottom covers.
OPTION INSTALLATIONS 12
R469
Voice synthesizer
level adj.
Space for UT-102
Voice synthesizer
unit
ZN Alp
fh =- ===
Mi CR-293 HIGH STABILITY CRYSTAL UNIT
A temperature-compensating crystal with a stability
of +3 ppm is built-in to the transceiver. For more
demanding operation, such as during transverter
use, etc., the CR-293 HIGH-STABILITY CRYSTAL
UNIT is available. It has a stability of +0.5 ppm.
@) Remove both the top and bottom covers. (p. 50)
© Open the MAIN unit chassis. (p. 50)
@) Remove the shield cover from the PLL unit.
(Fig. 1)
@) Remove 7 screws from the PLL unit, then lift up
the PLL unit to expose the bottom side of the
unit. (Fig. 2)
©) Unsolder the 3 points of the built-in crystal's lead
on the bottom of the PLL unit and the 1 point of
the crystal's case.
- Use a desoldering braid.
© Replace the built-in crystal with the CR-293 and
solder the leads of the CR-293.
@ Replace the PLL unit and the 7 screws.
Replace the PLL unit cover, MAIN unit chassis,
and top/bottom covers.
NOTE: The CR-293 is an oven-type crystal unit,
and specified frequency stability described above
is guaranteed 1 min. after power ON.
PLL unit cover
52