FT3DR/DE Technical Supplement
Alignment
ALIGNMENT-1
Introduction and Precautions
TheFT3DR/FT3DEhasbeencarefullyalignedat
thefactoryforperformanceacrossthespecified
amateur bands. Realignment should therefore
notbe necessaryexceptintheeventofacompo-
nentfailure.Allcomponentreplacement andser-
viceshouldbeperformedonlybyanauthorized
YAESUrepresentative,orthewarrantypolicymay
be voided.
Thefollowingprocedurescoverthesometimescrit-
icalandtediousadjustmentsthatarenotnormally
requiredoncethetransceiverhasleft the factory.
However,ifdamageoccursandsomepartsarere-
placed,realignment may be required. If a sudden
problemoccursduringnormaloperation,itislike-
lyduetocomponentfailure;realignmentshould
notbedoneuntilafterthefaultycomponenthas
beenreplaced.
Werecommend that servicingbeperformedonly
byauthorizedYAESUservicetechnicians,whoare
experiencedwiththecircuitryand fully equipped
for repair and alignment. Therefore, if a fault is
suspected,contactthedealerfromwhomthetrans-
ceiverwaspurchasedforinstructionsregardingre-
pair.AuthorizedYAESUservicetechniciansrealign
allcircuitsandmakecompleteperformancechecks
toensurecompliancewithfactoryspecifications
afterreplacinganyfaultycomponents.
Those who do undertake any of the following
alignmentsare cautionedto proceedat theirown
risk.Problemscausedbyunauthorizedaemptsat
realignmentare not coveredbythe warrantypol-
icy.Also,YAESUmustreservetherighttochange
circuitsandalignmentproceduresintheinterestof
improvedperformance,withoutnotifyingowners.
Underno circumstances should anyalignment be
attemptedunless the normalfunctionand opera-
tionof the transceiver areclearly understood, the
causeofthemalfunctionhasbeenclearlypinpoint-
edandanyfaultycomponentsreplaced,andthe
need for realignment determined to be absolutely
necessary.
Required Test Equipment
RFSignalGeneratorwithcalibratedoutputlevel
at 500 MHz
DeviationMeter(lineardetector)
In-lineWameterwith5%accuracyat500MHz
50-ohm, 10-W RF Dummy Load
8-ohm AF Dummy Load
RegulatedDCPowerSupplyadjustablefrom
8 to 16 V DC, 3 A
FrequencyCounter:0.2-ppmaccuracyat
500 MHz
AF Signal Generator
AC Voltmeter
DCVoltmeter:highimpedance
UHF Sampling Coupler
SINAD Meter
Alignment Preparation & Precautions
A 10-W RF dummy load and in-line wattmeter
mustbeconnectedtothemainantennajackinall
proceduresthatcallfortransmission;alignment
isnotpossiblewithanantenna.Aftercomplet-
ing one step, read the next step to see if the same
test equipment is required. If not, remove the test
equipment(exceptdummyloadandwattmeter,
ifconnected)beforeproceeding.Correctalign-
mentrequiresthetransceiverandtest equipment
bemaintainedat a constantambient temperature
between68~86°F (20~30 °C).When the transceiv-
erisbroughtintotheshopfromhotorcoldair,
itshouldbeallowedsometimetocometoroom
temperature before alignment. Whenever possible,
alignmentsshouldbemadewithoscillatorshields
andcircuitboardsrmlyaxedinplace.Also,the
test equipment must be thoroughly warmed up be-
fore beginning.
Note: Signal levels in dB referred to in the alignment
procedure are based on 0 dBμ=0.5 μV (closed circuit).
Important Notice
Donot adjust the alignmentmenus that are
not mentioned in this manual.
