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FCC ID: K66-8800R

Alignment

Vertex Standard Co., Ltd.

1

Introduction and Precautions

The 

FT-8800R

 has been carefully aligned at the factory for the specified performance

across the 144 MHz and 430 MHz amateur bands. Realignment should therefore not be
necessary except in the event of a component failure. All component replacement and
service should be performed only by an authorized Yaesu representative, or the
warranty policy may be voided.

The following procedures cover the sometimes critical and tedious adjustments that

are not normally required once the transceiver has left the factory. However, if damage
occurs and some parts are replaced, realignment may be required. If a sudden problem
occurs during normal operation, it is likely due to component failure; realignment
should not be done until after the faulty component has been replaced.

We recommend that servicing be performed only by authorized Yaesu service

technicians who are experienced with the circuitry and fully equipped for repair and
alignment. Therefore, if a fault is suspected, contact the dealer from whom the
transceiver was purchased for instructions regarding repair. Authorized Yaesu service
technicians realign all circuits and make complete performance checks to ensure
compliance with factory specifications after replacing any faulty components.

Those who do undertake any of the following alignments are cautioned to proceed at

their own risk. Problems caused by unauthorized attempts at realignment are not
covered by the warranty policy. Also, Yaesu must reserve the right to change circuits
and alignment procedures in the interest of improved performance, without notifying
owners.

Under no circumstances should any alignment be attempted unless the normal

function and operation of the transceiver are clearly understood, the cause of the
malfunction has been clearly pinpointed and any faulty components replaced, and the
need for realignment determined to be absolutely necessary.

Содержание FT-8800R

Страница 1: ...ormed only by authorized Yaesu service technicians who are experienced with the circuitry and fully equipped for repair and alignment Therefore if a fault is suspected contact the dealer from whom the transceiver was purchased for instructions regarding repair Authorized Yaesu service technicians realign all circuits and make complete performance checks to ensure compliance with factory specificat...

Страница 2: ...illoscope Spectrum Analyzer Deviation Meter linear detector AF Milivoltmetr AF Dummy Load 4 Ohm 5 W DC Voltmeter high impedance Inline Wattmeter with 5 accuracy at 500 MHz 50 Ohm non reactive Dummy Load 100 watts at 500 MHz VHF UHF Sampling Coupler Alignment Preparation Precautions A dummy load and inline wattmeter must be connected to the main antenna jack in all procedures that call for transmis...

Страница 3: ...nter frequency is within 100 Hz of 435 05 MHz Transmitter Deviation With the wattmeter dummy load and deviation meter connected to the antenna jack Inject a 1 kHz audio signal as a level of 80 mV to pin 5 of the MIC jack pin 4 is Ground Key the transmitter on 146 05 440 05 MHz Adjust the frequency deviation is within 4 0 4 4 KHz on the deviation meter CTCSS Deviation With the wattmeter dummy load ...

Страница 4: ...djust the output power is within 20 0 5 W on the power meter MID2 Key the transmitter on 146 05 440 05 MHz Adjust the output power is within 10 0 5 W on the power meter MID1 Key the transmitter on 146 05 440 05 MHz Adjust the output power is within 5 0 5 W on the power meter LOW Receiver Sensitivity With the dummy load and SINAD meter connected to the external speaker jack Inject a RF signal as a ...

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