Icom IC-751A Instruction Manual page 51

10 - 3 IC-EX310 VOICE SYNTHESIZER
UNIT
•INSTALLATION
lnsert 2-pin plug into J2.
•ADJUSTMENT
After being installed, the voice synthesizer announces the displayed
frequency when the SPEECH SWITCH on the front panel is pushed.
1) Turn the transceiver upside down.
2) lnstall the IC-EX310 unit as shown in the photo using the four
supplied screws. lnsert the 2-pin plug shown in the photo into
J2 of the IC-EX310 unit.
3) Plug the 8-pin plug from the IC-EX310 into J12 on the LOGIC
unit.
4) Adjust the volume and speech speed if necessary. The procedure
is described below.
5) Replace the top and bottom covers on the IC-751A.
1) Adjust the speech-volume and speech speed, if necessary, before
the top and bottom covers are replaced.
2)
Connect a power source to the transceiver and turn ON the
POWER SWITCH. Push the SPEECH SWITCH on the transceiver
to have the displayed frequency announced in English.
3) The volume of the announcement is adjustable with R 16 on the
voice synthesizer. Adjust R 16 for a comfortable audio level.
4) The W1 jumper wire controls the speech speed. Cut W1 to
i ncrease the speech speed.
5) Replace the top and bottom covers of the transceiver when
adjustments are completed.
10 - 4 CR-64 HIGH-STABILITY CRYSTAL UNIT
•INSTALLATION
Space for CR-64
(Bottom
View)
1) Turn the transceiver upside down.
2) Unscrew the six screws retaining the PLL board. Unplug the
connectors indicated in the photo, then turn the board over to
view the printed circuit side.
3) Using de-soldering braid, remove the solder from the original
crystal unit terminais and grounding lead. Remove the original
crystal unit an9 grounding lead from the board.
4) The mounting location for the high-stability crystal unit is shown
in the photo. The hales for the unit terminais are predrilled. If
the hales are filled with solder, remove the solder using desolder-
ing braid.
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