Icom IC-R75 Instruction Manual

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Icom IC-R75 Instruction Manual Manual pdf 38 page image

1034OPTION INSTALLATIONS■ Opening the receiver’s caseFollow the case and cover opening procedures shownhere when you want to install an optional unit oradjust an internal unit, etc.CAUTION: DISCONNECT the DC power cablefrom the receiver before performing any work onthe receiver. Otherwise, there is danger of electricshock and/or equipment damage.q Remove the 2 screws from the left side of thereceiver to remove an optional carrying handle, ifnecessary.w Remove the 4 screws from the top of the receiverand 4 screws from the sides, then lift up the topcover.e Remove the 2 screws from the bottom of thereceiver, slide the cover backward, then removethe bottom cover.The UT-102 announces the received frequency, mode,S-meter level and current time in a clear, electronically-generated voice, in English (or Japanese).➥ P u s h [ L O C K ] fo r 2 s e c . t o a n n o u n c e t h efrequency, etc.q Remove the top cover as shown above.w Remove the protective paper attached to thebottom of the UT-102 to expose the adhesive strip.e Plug UT-102 into J1271 on the MAIN unit asshown at right.r Return the top cover to its original position.■ CR-282 high stability crystal unitBy installing the CR-282, the total frequency stabilityof the receiver will be improved.q Remove the top cover as shown in the diagramabove.w Remove 5 screws from the PLL unit, disconnectP1 from J491 (MAIN unit), then remove the PLLunit.e Remove the supplied internal crystal and replacewith the CR-282.r Adjust the reference frequency at L2 using afrequency counter.t Return the PLL unit and top cover to their originalpositions.PLL unitMAIN unitCR-282InternalcrystalConnect a frequency counterhere and adjust the frequencyto 60.00000 MHz.L2PLL unit■ UT-102 voice synthesizer unit