Yaesu FTDX-9000MP Operation Manual

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Page 83FT DX 9000MP OPERATION MANUALSSB/AM M ODE T RANSMISSIONFigure 1Figure 2PHANTOM V OLTAGE FOR C ONDENSER M ICROPHONESFor powering a studio-quality condenser microphone connected to the front panel’s XLR (“Cannon”) connector, it ispossible to enable a 48-volt DC line connected to that jack. Because the improper enabling of this voltage could causedamage to other microphone types, the simple process for enabling the voltage has been made somewhat complicated, so asto prevent the voltage from being enabled by accident.1. Turn the front panel POWER switch (# ) Off, thenTurn the FPS-9000H’s POWER switch Off.2. Unplug the DC power cable from the rear panel DCIN jack.3. Referring to Figure 1, remove the eight screws fromthe sides of the transceiver case.4. Now remove the six screws shown in Figure 1 fromthe bottom case.5. Referring to Figure 2, locate jack J28 on the AF Unit,and remove the jumper plug which is connected acrosspins 2 and 3 of J28.6. Connect the just-removed jumper plug so that it nowis connected across pins 1 and 2 of J28 (instead of theoriginal position across pins 2 and 3).7. Replace the six screws to affix the bottom case, and re-place the eight screws from the sides of the transceiver(these screws were removed in steps 3 and 4 above).8. Connect the DC power cable to the rear panel’s DCIN jack.9. Turn the FPS-9000H’s POWER switch on, then turnthe front panel POWER switch on.10. If the above process has been successfully completed,you will observe that a small red LED just above andto the right of the XLR connector is now illuminated.If this LED is not glowing red, please check the statusof the jumper plug once more.11. If the red LED is glowing properly, the modificationto enable the phantom 48 Volt line is now complete.Note When opening/closing the case, take care with yourscrewdriver not to short out internal components, ortouch them in a way that will cause them to shortout against other components. Avoid touching internal components with your hand,as static electricity can cause damage to certain com-ponents if appropriate anti-static bench techniquesare employed. Only engage the phantom power when you have noalternative but to use a condenser microphone requir-ing such voltage. The wide availability of studio-gradeDynamic microphones (that do not require the phan-tom voltage) generally makes the use of the phantomvoltage unnecessary over the life of the transceiver.Because damage can occur if the phantom voltage isenabled on a microphone not requiring it, we stronglyrecommend that the jumper plug at J28 (AF Unit) beleft in its original position across pins 2 and 3. The phantom voltage capability of the FT DX 9000MPis disabled at the factory, and the lack of this voltageis not a “defect” or other condition covered by theLimited Warranty on this product. Accordingly, ifyou do not feel capable of enabling the phantomvoltage and ask a service shop to do so on your be-half, a service fee may apply.TerminologyPhantom VoltagePhantom Voltage is a term describing the voltage (48 Voltsat 10 mA max.) provided via the front panel’s XLR (“Can-non”) microphone connector, for use with a studio-gradecondenser microphone. Although disabled at the factory,enabling of the voltage only requires that the position ofan internal jumper plug be moved.Enable48-volt Supply LineDisableMoveJumper Plug(Inside the Transceiver)