Yaesu FT-847 Manual

"",,- YAESU
FT -847
HF & V/UHF Band Transceiver
Technical Supplement
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEXSTANDARD
us Headquarters
17210 Edwards Rd., Cerritos, CA 90703, U.S.A.
International Division
8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166. U.S.A.
.-C) YAESU EUROPE B.V.
-,- P.o. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
-0 Unit 12, Sun Valley Business Park, Win nail Close
-"~ Winchester, Hampshire. S023 OLB, U.K.
YAESU GERMANY GmbH
.'-'" Am Kronberger Hang 2, 0-65824 Schwalbach. Germany
VERTEX STANDARD HK LTD.
Unit 5. 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
~~cc."" ---~~.._""~-, ,~~ "---

Contents
Introduction 1-1
Specifications 1-2
Chip Component Information 1-3
Mechanical Details (Exploded Views & Mechanical Parts) 2-1
Alignment 3-1
Block & Interconnection Diagrams 4-1
PCB Diagrams & Parts List
AF-CNTL Unit 5A-1
PLL Unit 5B-1
RF Unit 5C-1
V /U-P A Unit 5D-1
PA Unit 5E-1
DSP Unit 5F-1
Panel Unit 5G-1
SSB-Filter-l/ -2 Unit 5H-1
Phone-Jack Unit 5 I-I
Mic Unit 5 J-1
HPF Unit 5K-1
r~ ~ -
Cut out the labelattheright, and placei.tbehind the: FT -847
clearplastic window in the spineof abInder. I Technical Supplement
L~ -
,f;;~,-o-_,-

Introd uction
POWER CLMC)
05, !...!...1"' ;II' ,i".~_.- ID 0'iiiii""""I0'" .-we TUNE
~ 'I !"W U 35snBnnn,'" lu5DnBnn 0O"OX ~'~=--.::: , .U .UUU bRDI '"'l ..:JU .UU C~ M[DPJ~ YAESU "oce'RANsce'"",, FT-847 -"Te~- 808FT
'-J "" ---RFPWRAn RF [ CD C!E:J @EBJ ~ I
j~~la:aO~ ~~~~8 00Q-O~o~ ~~~~~ -"OF'LO"
c~N:oCH
0SOL-'#-:1110 AF-3-RF VO"E $~~~3~S~23 ~ -3-~~0
~ Jr!J~~ jf~l0 T L ~~~De5
~ ~~~I[ 1~~[ a ~&~:&;cb t~~~?;0 ~
This manual provides technical information covered by warranty. For the major circuit
necessaryfor servicing the YaesuFT-847HF & boards, eachside of the board is identified byiV/UHF-Band
Transceiver.It doesnotinclude in- thetype of the majority of componentsinstalled
formation on installation and operation, which on thatside.In mostcasesonesidehasonly chip
are described in the FT-847Operating Manual components,and the other has either a mixture
provided with the transceiver,or onaccessories of both chip and lead components (trimmers,
which aredescribed in their manuals. coils,electrolytic capacitors,packagedICs,etc.),
The FT-847is carefully designedto allow the or lead componentsonly.
knowledgeable operator to make nearly all ad- While we believe the technicalinformation in
justmentsrequired forvarious stationconditions, this manual is correct,Yaesuassumesno liabili-
modesand operatorpreferencessimply from the ty for damagethat may occurasa result of typo-
controls onthe panels,without opening the case graphical or other errors that may be present.
of the transceiver.TheFT-847Operating Manu- Your cooperation in pointing out anyinconsis-
al describestheseadjustments, plus certain in- tencies in the technical information would be
ternal settings. appreciated. Yaesu Musen reservesthe right to
Servicingthis equipmentrequiresexpertisein make changesin this transceiver and the align-
handling surface mount chip components. At- mentprocedures,in the interestof technological
tempts by unqualified persons to service this improvement, without notification of owners.
equipment mayresultin permanentdamagenot
1-1
FT -847 Technical SupplementI

": c,cc",::~'f:~~;~
Specifications
General
Frequency Range: Receive 100kHz -30 MHz, 36MHz -76 MHz, 108MHz -174 MHz, 420MHz -512 MHz
Transmit 160 -6 Meters, 2 Meters, 70Centimeters (Amateur bands only)
5.1675 MHz (Alaska Emergency Channel)
Emission Modes: USB, LSB, CW, AM, FM Fl (9600bps Packet), F2 (1200 bps Packet) AFSK
Synthesizer Steps (Min.): 0.1 Hz (CW, SSB),10 Hz (AM, FM) ,
Antenna Impedance: 50-0., Unbalanced
Operating Temp. Range: -10 °C to +50 °C (14 of to 122 OF)
Frequency Stability: Better than:f:2 ppm (0 °C to +40 °C) SSB/CW / AM/ AFSK
Better than:f:5 ppm (-10 °C to +50 °C) SSB/CW / AM/ AFSK
Better than :f:11 kHz :f:5ppm} FM
Power Requirements: DC 13.8 V = :f:l0 %,Negative Ground
Current Consumption: Receive: 1.5 A (Squelched), 2.0 A (Max. Audio)
Transmit: 22 A (@ 100 W RF output)
Case Size: 260 (W) x 86 (H) x 270 (D) mm (10.24" x 3.39" x 10.63")
Weight: Approximately 7 kg (14.4lbs.)
Transmitter
Power Output: 160 -6 m: 100Watts (25 Watts AM carrier)
2m/70 cm: 50 Watts (12.5 Watts AM carrier)
Modulation Types: SSB:Balanced Modulator
FM: Variable Reactance
AM: Early Stage (Low Level)
FM Maximum Deviation: :f:5kHz (:f:2.5kHz on FM-N)
Spurious Radiation: Harmonics: At least 40 dB down (1.8 -29.7 MHz)
At least 60dB down (50/144/430 MHz)
Non-harmonic: At least 50 dB down (1.8 -29.7 MHz)
At least 60dB down (50/144/430 MHz)
Carrier Suppression: At least 40dB
Opp. Sideband Suppression: At least 40dB
3rd-Order IMD: At least 31 dB down (14 MHz, 100W PEP output)
SSBFrequency Response: 400 Hz -2600 Hz (-6 dB)
Microphone Impedance: 2000.- 10 ko. (Supplied microphone: 600 Q.)
Receiver
Sensitivity: SSB/CW AM-N FM
500 kHz -1.8 MHz: -20 JIV -
1.8-28MHz: 0.25JIV 2JIV -
28-30MHz: 0.25JIV 2JIV 0.5JIV
50 -54 MHz: 0.20 JIV 1 JIV 0.25 JIV
144/430 MHz: 0.125 JIV -0.2 JIV
(Abovespecificationsareworst-case.SSB/CW/AM-N figures arefor 10 dB SIN, 12 dB SINAD on FM)
Squelch Sensitivity: SSB/CW/AM FM
500 kHz -1.8 MHz: 20 JIV -
1.8-28MHz: 2pV -
28 -30 MHz: 2 JIV 0.25 JIV
50 -54 MHz: 1 JIV 0.20 JIV
144/430 MHz: 0.5 JIV 0.16 JIV
Image Rejection: Better than 60 dB
IF Rejection: Better than 60 dB
Selectivity (-6/-60dB): SSB/CW: 2.2 kHz/4.5 kHz
CW-N: 0.5 kHz/2.0 kHz (Optional YF-115C installed)
AM: 9kHz/20 kHz
AM-N: 2.2kHz/4.5kHz
FM: 15 kHz/30 kHz
FM-N: 9kHz/20 kHz
Audio Output: At least 1.5 0. into 8 W @10 % THO
Audio output impedance: 40. -160.
Specificationsare subjectto change,in the interestof improvement, without noticeor obligation.
Specifications areguaranteed only within Amateur bands.
1-2 FT -847 Technical Supplement

--
Chip Component Information
The diagrams below indicate someof the dis-
tinguishing features of common chip compo-
nents.
Capacitors (Unit: mm)
~ L Type L W H
2125 2.0 1.25 0.35 ~ 0.5
~ 1608 1.6 0.8 0.65 ~ 0.95
H
T 1005 1.0 0.5 0.45 ~ 0.55
Tantalum Capacitors
w L (Unit: mm)
-L Type L W H
H P 2.0 1.25 1.2
+ T A 3.2 1.6 1.6
B 3.4 2.8 1.9
-C 5.8 3.2 2.3
Resistors
~ L Marking* 100,222, 473...
-L 473
H
TTens Ones Multiplier
0 0 100
1 1 101
Indicated Letters 2 2 102
1 2 3 45 &, : , 0.:: ~~
5 5 105
(Unit: mm) 6 6 106
Type L W H 7 7 107
1/10 2.0 1.25 0.5 8 8 108
9 9 109
1/16 1.6 0.8 0.45
1/165 1 0 0 5 035 Examples: l00==10Q
...222==2.2kQ 473==47kQ
1-3
FT-847TechnicalSupplement

Chip Component Information
Replacfng Chip Components Precautions for Chip Replacement
Chip components areinstalled atthe factory 0 Do not disconnecta chip forcefully, or the
bya seriesof robots. The first oneplacesasmall foil pattern may peeloff the board.
spotof adhesiveresin atthe locationwhere each 0 Never re-usea chip component.Disposeof
part is to be installed, and later robots handle all removed chip components immediate-
and place parts using vacuum suction. ly to avoid mixing with new parts.
Forsinglesidedboards,solderpasteisapplied 0 Limit soldering time to 3secondsor lessto
and the board is then baked to hardenthe resin avoid damagingthe componentandboard.
and flow thesolder. Fordouble sidedboards,no
solder paste is applied, but the board is baked Removing Chip Components
(orexposedto ultra-violet light) to curetheresin 0 Removethe solder at eachjoint, onejoint ata
before dip soldering. time, using solder wick whetted with nona-
In our laboratories and service shops,small cidic fluxes asshown below. Avoid applying
quantities of chipcomponentsaremounted man- pressure,and do not attempt to remove tin-
ually byapplying aspotof resin,placingthecom- ning from thechip's electrode.
ponents with tweezers, and then soldering by
very small dual streamsof hotair (without phys- , -
, ical contactduring soldering). We removeparts ~-~j byfirst removing solderusing avacuum suction ~
iron, which applies a light steadyvacuum atthe
iron tip, and then breaking the adhesive with
tweezers. 0 Graspthe chip on both sides with tweezers,
Special vacuum/ desoldering equipment is and gently twist the tweezersbackand forth
recommended if you expectto do a lot of chip (to breakthe adhesive bond) while alternate-
replacements. Otherwise, it is usually possible ly heating eachelectrode. Becareful to avoid
to remove and replace chip components with peeling the foil tracesfrom the board.
only a tapered, temperature-controlled solder- .Dispose of the chip when removed.
ing iron, a setof tweezers and braided copper 0 After removing thechip, usethe copperbraid
solderwick. Soldering iron temperature should and soldering iron to wick away any excess
be below 280°C(536°F). solderand smooth the land for installation of
the replacementpart.
C'c 1-4 FT-847 Technical Supplement
f

-Chip Component Information
Installing a Replacement Chip
As the value of somechip componentsis not
indicated onthe body of the chip, becareful to
getthe right part for replacement.
0 Apply a small amount of solder to the land
on one sidewhere the chip is to be installed.
Avoid too much solder, which may cause
bridging (shorting to other parts).
0 Hold the chip with tweezers in the desired
position, and apply the soldering iron with a
motion line asindicated by the arrow in the
diagram below. Do not apply heat for more
than 3 seconds.
0 Removethetweezersand soldertheelectrode
onthe othersidein themannerjustdescribed.
1-5
FT -847 Technical Supplement

':,
T -Exploded View & Miscellaneous Parts
RAOO70000
S4000045 RAOO7000A (Lot 3-)
TOPCA E
REI::: ___=~De~cription -~:~- Y~~- 9!¥-:-
-~ PAN HEAD SCREW M2.6x6 U00200iXI1 4
<2> PAN HEAD SCREWM3xB UOO3OBOO1 14
<3> PAN HEAD SCREW M3x30 UOO330001 4
@ PAN HEAD SCREW M4x6B U00406007 2
<5> SEMS SCREW ASM3x6 UO3300001 8
@ BINDING HEAD SCREWM2x4B U20104007 1
(1) BINDINGHEADSCREWM3x6 U20306001 3 @ R4150130
@ TAPTITE SCREW M3x6 U24306001 83 HANDLE HOLDER (2pcs)
@ TAPTITE SCREWM3xB U243OBOO1 9
<8 OVAL HEAD SCREW M4x6B U31406007 2
@ OVALHEADSCREWM4x1OB U31410007 4
@ OVAL HEAD SCREW M4x16B U31416007 2
@ TAPTITE SCREW M3x6 U34306001 4
@ TAPTITE SCREWM3x6 U44306001 8
@ TOOTHED LOCK WASHER OW4NI U72004002 1
@ HEX HEAD BOLT HSM4x16NI U9900076 1
BINDING HEAD SCREW M3x1B U20318001@ BINDING HEAD SCREW M3x2ONI (Lot 8-) U20320002 4 t B-)
Non-designated parts are available
only as part of a designated assembly. @
V/U-PA Unil
D
)
RAOO63000
RAOO6300A (Lot 4-) (SP)
RUBBER KNOB (MODE)
RA00651 00
KNOB (POW)
RA0065200
KNOB (MOX)
RA0063300
RA006330A (Lot 4-)
RUBBER KNOB (TU) )
17-)
~@
@ AF-GNTL Unit
"'"./ RA0070100
RA0063200 ./" RAOO7010A (Lot. 3-)
RA006320A (Lot 4-) IS\ BOTTOM CASE
RUBBER KNOB (ME) ~
RA00631 00
RA006310A (Lot 4-)
RAOO72400 RUBBER KNOB (KEY)
COIL SPRING
RA0065500
ENCODER KNOB (2pcs) RAOO63400
RAOO65600 RAOO6340A (Lol. 4-)
VOLUME KNOB RUBBER KNOB (CL)
RA0065400
RAOO64800 RA0070300 KNOB (OUT) (4pcs)
KNOB MAIN ASS'Y SHEET (SAT) RAOO65300
RA006530A (Lol. 4-)
RAOO65900 KNOB (IN ) (4pcs)KNOB (SHUTTLE)
R3100700
R3100700A (1.01. 12-)
FOOT (2pcs)
FT-847 Technical Supplement 2-1

'::~:;';;:~iii!L
Exploded View & Miscellaneous Parts
REF. DESCRIPTION VALUE V/W TOL. MFR'S DESIG IYAESU PIN VERSo LOT.
""" MAIN ASS'Y """
C 0001 AL.ELECTRO.CAP. 100uF 16V RE3-16V101M 100UF K40129063 1-
FNOO01 FAN A0512 DC12V M2090017 1-
FNOO01 FAN F412R-12MB-32 DC12V M2090028 8-
FNOO02 FAN JF0625S1M-050 DC12V M2090023 1-
FNOO02 FAN JF0625S1M-050R1 DC12V M2090029 16-
J 0001 CONNECTOR FM-MDR-MI P1090352 1-
J 0002 CONNECTOR FM-MDR-MI P1090352 1-
J 0003 CONNECTOR FM-MDR-MI P1090352 1-
J 0004 CONNECTOR 020-0291 P1090547 1-
JPOO01 WIRE ASSY GRN 280 (2)1(2) T51528002 UNITED KINGDON 8-
POO01 WIREASSY A1179 T9206718 1-
P 0002 WIRE ASSY A1179 T9206702 1-
POO02 WIREASSY A1179 T9206702A 5-
P 0003 WIRE ASSY A1179 T9206703 1-
P 0003 WIRE ASSY A1179 T9206703A 5-
P 0004 WIREASSY A1179 T9206704 1-
P 0004 WIRE ASSY A1179 T9206704A 5-
POO05 WIREASSY A1179 T9206705 1-
POO05 WIREASSY A1179 T9206705A 2-
POO05 WIREASSY A1179 T9206705B 5-
P 0006 WIRE ASSY A1179 T9206706 1-
P 0006 WIRE ASSY A1179 T9206706A 2-
POO07 WIREASSY RED 280/400V5.5 T9318054 1-
P 0008 WIRE ASSY BLK 280/360 V5,5 T9318055 1-
P 0009 WIRE ASSY GRA 280 TMPITMP T9311201 1-
PO010 WIREASSY A1179 T9206707 1-
PO010 WIREASSY A1179 T9206707A 5-
PO011 WIREASSY A1179 T9206708 1-
PO011 WIREASSY A1179 T9206708A 5-
P 0012 WIRE ASSY A1179 T9206710A 1-
P 0012 WIRE ASSY A1179 T9206710B 5-
PO012 WIREASSY A1179 T9206710C 7-
PO013 WIREASSY A1179 T9206709A 1-
PO013 WIREASSY A1179 T9206709B 5-
P 0013 WIRE ASSY A1179 T9206709C 7-
PO014 WIREASSY A1179 T9206711 1-
PO014 WIREASSY A1179 T9206711A 5-
PO015 WIREASSY A1179 T9206712 1-
P 0015 WIRE ASSY A1179 T9206712A 5-
P 0016 WIRE ASSY BRN 330 TMPITMP T9318041 1-
P 0017 WIRE ASSY YEL 210 TMPITMP T9318042 1-
P 0018 WIRE ASSY BLK 340 TMPITMP T9318043 1-
P 0018 WIRE ASSY BLK 360 TMPITMP T9318056 2-
P 0019 WIRE ASSY ORG 200 TMPITMP T9318044 1-
PO020 WIREASSY A1179 T9206713 1-
PO020 WIREASSY A1179 T9206713A 5-
PO021 WIREASSY A1179 T9206714 1-
i PO022 WIREASSY BLK60TMPITMP T9318045 1-
J. P 0022 WIRE ASSY RED 60 TMPITMP T9318059 2-
i P 0023 WIRE ASSY ORG 120 TMPITMP T9318046 1-
I P 0023 WIREASSY GRN 110TMPITMP T9318060 2-
P 0024 WIRE ASSY BLK 140 TMPITMP T9318047 1-
P 0024 WIRE ASSY YEL 140 TMPITMP T9318061 2-
P 0025 WIRE ASSY ORG 150 TMPITMP T9318048 1-
P 0025 WIRE ASSY GRA 150 TMP/" T9318065 2-
PO026 WIREASSY A1179 T9206715 1-
P 0027 WIRE ASSY GRN 500 TMPITMP T9318049 1-
P 0028 WIRE ASSY RED 290 TMPITMP T9311404 1-
P 0028 WIRE ASSY RED 310 TMPITMP T9318058 2-
P 0028 WIRE ASSY RED 290 TMPITMP T9311404 7-
P 0029 WIRE ASSY A1179 T9206716 1-
PO029 WIREASSY A1179 T9206716A 5-
PO029 WIREASSY A1179 T9206716B 7-
P 0030 WIRE ASSY A1179 T9206717 1-
P 0032 WIRE ASSY A1179 T9206757 2-
S 0001 ROTARY ENCODER RSM20-250 09000631. 1-
S 0002 ROTARY SWITCH SRGPVJ-E N0190173 1-
SPOOO1SPEAKER 8-ohm VS-66Y 3W/8 OHM M4090066 1-
2-2 FT-847 Technical Supplement
i~_. --I'

_Alignment
Introduction and Precautions steps do not require all of the equipment listed,
The following procedures cover adjustments the interaction of some adjustments may require
that are not normally required once the trans- that more complex adjustments be performed af-
ceiver has left the factory. However, if damage terwards. Do not attempt to perform only a sin-
occurs and some parts subsequently are replaced, gle step unless it is clearly isolated electrically from
realignment may be required. If a sudden prob- all other steps. Rather, have all test equipment
lem occurs during normal operation, it is likely ready before beginning, and follow all of the steps
due to component failure; realignment should in a section in the order they are presented.
not be done until after the faulty component has Required Test Equipment
been replaced. 0 Digital DC Voltmeter (high-Z,1 MQ/V)
We recommend that servicing be performed 0 DC Ammeter
by authorized Yaesu service technicians, who are 0 RF Millivoltmeter
experienced with the circuitry and fully 0 AC Voltmeter
equipped for repair and alignment. If a fault is 0 RF St d d S.1 G /l'b d0 0 an ar Igna enerator w ca 1 rate
suspected, contact the sellIng dealer for mstruc- t t d dB 1 0 dB 0 5 Vou pu an sca e, p = .p
tions regarding repair. Authorized Yaesu service 0 AF so1G .h l ob dIgna enerator wIt ca 1 rate output
technicians have the latest modification informa- 0FCrequency ounter
tion, and realign all circuits and make compete 0 T 50 QD L d (150wo -ummy oa s -250 watts)
performance checks to ensure compliance with 0 150-Q Dummy Load (150 watts)
the factory specifications after repairs. 0I L.W(150 2500 )n- me attmeter -watts, 5 -Q
Those who do undertake any of the following 0L. D tmear e ector
alignments are cautioned to proceed at their own 0RF Att (150 40 dB) 1.enuator watts, or samp mg
risk. Problems caused by unauthorized attempts 1coup er
at realignment are not covered by the warranty 0St A 1 d 1 Gpec rum na yzer goo to at east 1 Hz
policy. Also, Yaesu must reserve the right to
change circuits and alignment procedures in the Alignment Preparation & Precautions
: interest of improved performance, without noti- A 50-Q dummy load and in-line wattmeter
~
~ fying owners. Under no circumstances should must be connected to the antenna jack in all pro-
f' any alignment be attempted unless the normal cedures that call for transmission, except where
function and operation of the transceiver are specified otherwise. Correct alignment is not
clearly understood, the cause of the malfunction possible with an antenna. Except where speci-
has been clearly pinpointed and any faulty com- fied otherwise, the transceiver should be tuned
ponents replaced, and the need for realignment to 14.2000 MHz, USB mode, and these control~
determined to be absolutely necessary. set as indicated:
The following test equipment (and thorough 0 MaX, PROC/KEYER, MONt OFF
familiarity with its correct use) is necessary for 0 MIC & RF PWR fully CCW
complete realignment. Correction of problems 0 A TT, RF AMP, AGC-F, NB OFF
caused by misalignment resulting from unautho- 0 AF as required
rized adjustments made with improper test equip- 0 SQL fully CCW
ment is not covered by warranty. Although most 0 SHIFT 12-o'clock
3-1
FT -847 Technical Supplement
1-

,. ,
Alignment
0 LOW CUT fully CCW PLL Adjustments
0 HIGH CUT, RF GAIN fully CW HF-VCO VCVadjustment
The transceiver's Alignment Routine is re- 0 Connect the DC voltmeter to TP200l, and re-
quired for some procedures. If an Alignment ferring to table below, tune the transceiver to
Routine cannot be selected, power may have to eachfrequency, then confirm or adjust the list-
be switched off then back on to re-enable menu ed component for the required voltage.
selection. .HF VCO Adjustment
To begin, turn the transceIver off. Press the TAd./C f.f.une to: Just on Irm or
UP, DWN and FAST keys on the mIcrophone to- 10.495MHz adjustT2001 6.5V:t0.1V
gether while turning the transceiver on again. 0.100MHz confirm atleast0.4V
In the alignment procedure, each alignment 21.995MHz adjustT2002 6.5V:t0.1V
parameter is selected by rotating the SUB-TUNE 10.500MHz confirm atleast0.4V
dial. The alignment is performed by pressing the 36.995MHz adjustT2003 6.5V:t0.1V
MCK/W key while injecting a signal of the re- 22.000MHz confirm atleast0.4V
.dfd1 1 53.995MHz adjustT2004 6.5V:t0.1V
quIre requencyan eve. .
37.000MHz confIrm at least0.4V
Pressing the MENU key after a setting is made 75.995MHz adjust T2005 6.5V:t0.1V
stores the entry. To exit the alignment routine, 54.000MHz confirm atleastO.4V
press POWER. After performing the systemalign-
ment in its entirety, individual settings canbe re- VHF- VCO VCV check!
i turned to and adjusted should the need arise. 0 Connect the DC voltmeter to TP2002, and re-
,I Read 'each step to determine if the same test ferring to table below, tune the transceiver to
"-'1 equipment used in the previous step will be re- eachfrequency, then confirm that the required
I quired. If not, remove the test equipment (except voltage is present.
! dummy load and wattmeter, if connected) be- VHFVCO check
fore proceeding. Correct alignment requires that Tuneto: for
the ambient temperature be the same as that of 108.000MHz atleast0.5V
the transceiver and test equipment, and that this 139.995MHz lessthan7.2V
temperature be held constant within 20 ~ 30°C 140.000MHz atleast0.5V
(68 ~ 86°F). If the transceiver is brought into the 173.995MHz lessthan7.0V
I shop from hot or cold air, it should be allowed UHF-VCO VCV check
1 time for thermal equalization with the environ- 0 Connect the DC voltmeter to TP2003, and re-
j ment before alignment. Alignments must only ferring to table below, tune the transceiver to
j be made with oscillator shields and circuit.boards each frequency. Confirm that the required
i firmly affixed in place. Also, the test equIpment voltage is present.
must be thoroughly warmed up before begin-
.UHF VCO check
rung. ..Tune to: for
Note: Signal levelsin dBreferredto m alzgnmentare 420.000MHz atleast0.5V
basedon 0 dB/l = 0.5 /lV. 459.995MHz lessthan7.0V
TableNote: DC voltagesshould bewithin ::t:l0% of 460.000MHz atleast0.5V
thoselisted in thevoltage tables. 511.000MHz lessthan7.0V
3-2 FT-847 Technical Supplement

-Alignment
PA Unit Adjustments (HF) meter between J5001's pin 1 and chassis ground.
Pre-drive section Idling Current Adjustment 0 Key the transmitter, and with no microphone
a Connect the 50-.0. dummy load to the HF an- input, adjust TC5001 for minimum indication!
tenna jack, and remove the jumper connector on the DC voltmeter.
at J5006. Connect the ammeter to J5006 (pin 1 V/U-P A Unit Adjustments
"+" lead, pin 2 "-" lead). Tune the transceiver VHF-PA section Idling Current Adjustment
to 14.005 MHz, and select the CW mode. 0Tun th t .t 145 995 MH de e ranscelver o. z, an se-
a Press the MaX switch, and without closing the I t th CW d C t th 50 .0. dec e mo e. onnec e -ummy
"Key" line, adjust VR500l for 0.25 A (:to.025 I d t th 144MHz t .k R hoa 0 e an enna Jac. emove t e
A) on the ammeter. Then remove the amme- . b tw TP4001 d TP4002 dJumper e een an ,an con-
ter and reinstall the jumper connector at J5006. t th t b tw TP4001 ( " "
I d)nec e amme er e een -ea
Drive section Idling Current Adjustment and TP4002 ("+" lead).
0 Connect the 50-.0. dummy load to the HF an- 0 Press the Max switch, and without closing the
tenna jack, and remove the jumper connector Key line, adjust VR4002 for 0.3 A (:to.03 A) on
at J5007. Connect the ammeter to J5007 (pin 1 the ammeter. Then remove the ammeter and
"+" lead, pin 2 "-" lead). Tune the transceiver reinstall the jumper between TP4001 and
to 14.005 MHz, and select the CW mode. TP4002.
0 Press the MaX switch, and without closing the UHF PA t.Ldl 'CtAd 'tt-
-sec ton mg urren Jus men
"Key" line, adjust VR5002 for 1.5 A (:to.15 A) 0Tth t .t 439 995 MH dune e ranscelver o. z, an se-
on the ammeter. Then remove the ammeter I t th CW d C t th 50 .0. dec e mo e. onnec e -ummy
and reinstall the jumper connector at J5007. I d t th 430MH t .kR thoa 0 e z an enna Jac. emove e
Final section Idling Current Adjustment jumper between TP4003 and TP4004, and con-
0 Connect the 50-.0. dummy load to the HF an- nect the ammeter between TP4003 ("-" lead)
tenna jack, and remove the jumper between and TP4004 ("+" lead).
.' TP500l and TP5002. Connect the ammeter be- 0 Press the MOX switch, and without closing the
t tween TP5001 ("+" lead) and TP5002 ("-" "Key" line, adjust VR4001 for 0.3 A (:to.03 A)
!. lead). Tune the transceiver to 14.005 MHz, and on the ammeter. Then remove the ammeter
select the CW mode. and reinstall the jumper between TP4003 and
0 :ress ,~h~ MaX ~witch, and without closing the TP4004. .-Key lIne, adjust VR5003 for 0.42 A (:to.025 TX dRX IF Ad .tan Jus ments
A) on the ammeter. Then remove the amme-
ter and reinstall the jumper between TP500l Reference Output Adjustment
and TP5002. 0 Connect the RF millivoltmeter to TP1002, and
adjust T10l0 and T1007 for maximum indica.
CM coupler balance tion on the RF millivoltmeter.
0 Tune the transceiver to the 50 MHz high band 0 Replace the RF millivoltmeter with the fre.
edge (different in each country), and connect quency counter, and adjust TC1001 for 45.25{
the 50-.0. dummy load to the 50MHz antenna MHz (:t10 Hz) on the frequency counter.
jack. Preset the RF PWR control fully clockwise 0 Remove the coaxial plug from J1002 and con
and select the PM mode. Connect the DC volt- nect the RF millivoltmeter across the socket
3-3
FT -847 Technical Supplement
I

Alignment
Adjust T1003 for maximum indication on the 0 Remove the RF millivoltmeter, and replace the
RF millivoltmeter. plug into J1002.
0 Remove the RF millivoltmeter, and replace the RX IF Sensitivity
Plu ginto J1002. . R0 Preset the RF control fully clockwIse. emove
TX Local Adjustment the coaxial plug from J1001 and connect the
0 Connect the 50-,0 dummy load to the HF an- signal generator across the socket, and inject 0
tenna. jack and connect the DC voltmeter to dBm at 45.705 MHz (no modulation). Connect
TP1003. Select the CW mode. the DC voltmeter to TP1048.
0 Key the transmitter, and adjust T1009 for 3.0 0 Adjust T1005, T1008, T1015, and T1017 ~ T1019
V (:to.2 V) on the DC voltmeter. for minimum indication on the DC voltmeter.
0 Remove the signal generator, and replace the
TX DDS Adjustment
..plug into J1001.
0 Connect the RF ffilllIvoltmeter to TP1004, and
adjust T1020 for maximum indication on the Noise Blanker Adjustment
RF millivoltmeter. 0 Remove the coaxial plug from J1001 and con-
.nect the signal generator across the socket, and
RX DDS Adjustment .
connect the DC voltmeter to TP1049. Inject a
0 Connect the RF millivoltmeter to TP1005, and. I 705 MH ( d I t '
) tsIgna at 45. z no mo u a Ion so as 0
adjust T1021 for maximum indication on the
DC Iget a reading on the vo tmeter.
RF millivoltmeter. d T1006 f ... d.0 Adjust T1004 an or mInImum In Ica-
FM IF Adjustment tion on the DC voltmeter. Increase the signal
0 Connect the 50-,0 dummy load to the HF an- generator level, if necessary, to maintain a use-
tenna jack and connect the RF millivoltmeter ful DC voltage indication.
to TP1005. Select the PM mode. 0 Remove the signal generator, and replace the
0 Key the transmitter, and adjustT1012 ~ T1014 for plug into J1001.
maximum indication on the RF millivoltmeter.
...TX and RX Adjustments
0 Replace the RF millivoltmeter wIth the fre- ...
quency counter. Key the transmitter, and ad- VHF RXIF SenSltlvlty
just T1016 for 45.580 MHz (:t100 Hz) on the 0 Connect the signal generator to the 144MHz
frequency counter. antenna jack, and connect the SINAD meter and
4-Q dummy load to the EXT SPKR jack. Tune
Carrier Frequency Adjustment the transceiver to 145.995 MHz, and select the
0 Remove the coaxial plug from J1003 and con- FM mode. Preset the RF control fully clockwise
nect the frequency counter across the socket. and the SQl control fully counter-clockwise.
Select the CW mode. 0 Inject a signal from the signal generator at
0 Key the transmitter, and adjust TC1002 for 145.995 MHz (:t3.5 kHz deviation of a 1 kHz
45.580 MHz (:t10 Hz) on the frequency counter. tone), adjust the level to get a moderate SINAD
0 Replace the frequency counter with the RF mil- reading on the meter, and adjust T3006, T3012,
livoltmeter, and key the transmitter, and ad- T3014, T30l7, T3027, T3029, and T3031 for op-
just T1002 for maximum indication on the RF timum SINAD.
millivoltmeter.
3-4 FT -847 Technical Supplement

Alignment
0 Connect the DC voltmeter to TP1048and chas- 0 Selectthe FM mode. Key the transmitter, and
sis ground, and select the CW mode. adjustVR3003 for 50 Won the inline wattmeter.
0 Inject a signal at 145.995 MHz so as to get a 430 MHz TX Adjustment
reading on the DC voltmeter, and adjustT3006, 0 W.th th .1.tt t d 50 .Q d1 e m me wa me er an -ummy
T3012, T3014, T3017, and T3031 for minimum 1 d t d t th 430MH t . koa connec e 0 e z an enna Jac ,
indication on the DC voltmeter. t th AF t t th MIC .k ( .
connec e genera or 0 e Jac pm
0 Now inject a signal at 129.995MHz, and tune 8.. t . 7d) T th tr .
: ffilCmpu , pm : groun .une e anscelV-
the transceiver to 129.995MHz. Adjust T3007, er to 439.995MHz, and selectthe USB mode.
T3011, T3015, and T3018 for minimum indica- 0 Injecta1 kHz tone at3 mV level to the MIC jack.
tion on the DC voltmeter. Keythe transmitter, and adjust TC3001,TC3003,
50 MHz RX IF Sensitivity and TC3004in successionseveraltimes for max-
0 Connect the signal generator to the 50MHz imum indication on the inline wattmeter.
antenna jack, and connect the DC voltmeter 0 Selectthe FM mode. Key the transmitter, and
between TP1048and chassisground. Tune the adjust TC4001,TC4003, and TC4005 in succes-
transceiver to 50.295 MHz, and select the CW sion several times for maximum indication on
mode. Preset the RF control fully clockwise the inline wattmeter.
and the SQL control fully counter-clockwise. 0 Connect the DC voltmeter between pin 3 of
0 Inject a signal at 50.295 MHz so as to get de- J4007and chassis ground.
~ flection on the DC voltmeter, and adjustT3019, 0 Key the transmitter, and adjust TC4004 for
f T3021, T3025, and T3028 for minimum indica- minimum indication on the DC voltmeter.
I tion on the DC voltmeter. 0 Still in the FM mode, key the transmitter, and
..
,
!144MH TX Ad .t t adjust VR3002for 50 W on the inline wattmeter.
f z Jus men
I 0 With the inline wattmeter and 50-.Q dummy 50 MHz TX Adjustment
,load connected to the 144MHz antenna jack, 0 With the inline wattmeter and 50-.Q dummy
connect the AF generator to the MIC jack (pin load connected to the 50MHz antenna jack,
8:mic input, pin 7: ground). Tune the transceiv- connectthe AF generator to the MIC jack. Tune
er to 145.995MHz, and selectthe USBmode. the transceiver to 50.295 MHz, and select the
0 Inject a 1 kHz tone at 3 mV level to the MIC USBmode.
jack. Key the transmitter, and adjustT1002 on 0 Inject a signal from the AF generator at 1 kHzl
the AF-CNTL Unit and T3005, T3008, and tone. Key the transmitter, adjust the audio lev-
T3010 on the RF Unit in succession several el so as to produce power output that can be
times for maximum indication on the inline read on the external wattmeter, and then ad-
wattmeter. just T3003, T3009, T3013, and T3016 in succes-
0 Select the FM mode. Key the transmitter, and sion several times for maximum indication on
adjust TC4002 for maximum indication on the the external wattmeter.
inline wattmeter. 0 Tune the transceiver to 50.295MHz (for French
0 Connect the DC voltmeter between pin 3 of version) or 51.995 MHz (for other versions),
J4007 and chassis ground. Key the transmit- and select the FM mode. Key the transmitter,
ter, and adjust VR4004 for minimum indica- and adjust VR3004 for 100 W on the external
tion on the DC voltmeter. wattmeter.
3-5I
-fT-847T..hni.al Supp/.m.nt

""'-':":::Y1~~.J[:tc-
Alignm ent
HF TX Adjustment ..
...mg IS less than 4.0 A below that measured in
0 WIth the mllne wattmeter and 50-0 dummy the previous step, adjust VR3009 for a read-
load connected to the HF antenna J"ack tune ing 40 A (+0 2 A) 1 th h f h .
, .-.ower an t at 0 t e prevI-
the transceiver to 3.505 MHz, and select the ous step.
FM mode.
0 Key the transmitter, and adjust VR3006 for 100 TX and RX Adjustments
Won the inline wattmeter. (Alignment Menu Adjustments)
0 Tune the transceiver to 1.830MHz, and select 144MHz BandFM-S1 Adjustment
the PM mode. Key the transmitter, and adjust 0 Connect ~hesignal generator to the 144MHz
VR3005 for 100 W on the inline wattmeter. antenna Jack, and tune the transceiver to
AFP d.145.995 MHz. Selectthe PM mode.
a Justment .
0 Select alIgnment menu [FM-S1] and inject a
0 Preset VR3007, VR3008, and VR3009 full y-6 dB .1( 3 5 kH d ..'
" p sIgna :t. Z evIahon of a 1 kHz
clockwIse, and connect the ammeter between tone). Then press the MCK/W key
the transceiver's 13.8VDC connector and the .
! DC power supply. 144MHz BandFM-Full ScaleAdjustment
: 0 Tune the transceiver to 145.995 MHz and se- 0 Connect the signal generator to the 144M Hz
lect the CW mode (with no connection to the antenna jack, and tune the transceiver to
144MHz antenna jack). Key the transmitter, 145.995MHz. Selectthe PM mode.
and adjust VR1001 for 8.0 A (:to.1 A) on the 0 Select alignment menu [FM-FULL], and inject
ammeter. a +20.0 dBp signal (:t3.5 kHz deviation of a 1
0 Tune the transceiver to 439.995 MHz and se- kHz tone). Then press the MCK/W key.
lect the CW mode (with no connection to the 144MHz Band ScanDiscriminator
430MHz antenna jack). Key the transmitter, Center-StopAdjustment
and confirm the current on the ammeter. If 0 Connect the signal generator to the 144MHz
over 8.0 A on the ammeter, adjust VR1001 for antenna jack, and tune the transceiver to
8.0 A (:to.1 A) on the ammeter. If under 8.0A 145.995MHz. Selectthe PM mode.
on the ammeter, adjust VR3007 for 8.0 A (:to.1 0 Select alignment menu [DISC-L], and inject a
A) on the ammeter. signal at 145.992 MHz, level +20.0 dBp (:t3.5
0 Connect the 50-0 dummy load to the HF an- kHz deviation of a1 kHz tone). Then press the
tenna jack. Tune the transceiver to 14.005MHz MCK/W key.
and select the CW mode. Key the transmitter, 0 Select alignment menu [DISC-H], and inject a
and make anote of the current on the ammeter. signal at 145.998 MHz, level +20.0 dBp (:t3.5
0 Disconnect the 50-0 dummy load and connect kHz deviation of a1 kHz tone). Then press the
the 150-0 dummy load (or three 50-0 loads in MCK/W key.
parallel) to the HF antenna jack. Key the trans- 144MHz Band SQL ThresholdAdjustment
mitter, and compare the current with the above 0 Tune the transceiver to 145.995MHz, and the
step. If the ammeter reading is more than 4.0 select the PM mode.
A lower than that measured in the previous 0 Select alignment menu [SQL- TH-L], and in-
step, adjust VR1001 for 4.0 A (:to.2 A) lower ject no RF input. Then press the MCK/W key.
than the previous step. If the ammeter read- 0 Press the A~B key ([SQL- TH-H] will appear
3-6 FT -847 Technical Supplement

~Alignment
onthe display), and apply no RFinput. Then 0 Selectalignment menu[RX-GAIN], and select
pressthe MCK/W key. the USBmode. Inject a signal of level-6 dBp
44MHz BandSQLTightAdjustment (nomodulation), and adjusttheMEMNFO CH
~ Connectthe signal generator to the 144MHz control for just1 segmentindication on the S-
..meter. Thenpressthe MCK/W keyantenna Jack, and tune the transceIver to .~
145.995MHz. Selectthe FM mode. 430MHz BandRX GainAdjustment .
CJSelectalignment menu [SQL-TI-L], and inject 0 Connect the signal generator to the 430MHz
asignal at145.995MHz, level0 dBp(::t3.5kHz antenna jack, and tune the transceiver to
deviation of a 1 kHz tone). Then press the 439.995MHz.
MCKIW key. 0 Selectalignment menu [RX-GAIN], and select
CJPressthe A~B key ([SQL-TI-H] display), and the USBmode. Inject a signal of level-6 dBp
injectasignalat145.995MHz, level0dBp(::t3.5 (nomodulation), and adjusttheMEMNFO CH
kHz deviation ofa1 kHz tone).Thenpressthe control for just 1 segmentindication on the S-
MCKIW key. meter.If thehexadecimaldataonthe transceiv-
144MHz BandSSB-S1Adjustment er's display is lessthan "40H", turn the MEMI
0 Selectalignment menu[SSB-S1],andtunethe VFO CH control for just "40H" indication on
transceiver to 145.995MHz. Selectthe USB the display. Thenpressthe MCK/W key.
mode, preset the RF control to the 2-0'clock 50 MHz BandRX GainAdjustment -
position, and inject no RFinput. Then press 0 Connect the signal generator to the 50MHz
the MCK/W key. antennajack,andtunethe transceiverto 51.995
144MHz BandSSB-S9Adjustment MHz (forversoA, C,D, H) or 50.295MHz (for
0 Connectthe signal generator to the 144MHz versoB,~).
t.k d t th t . t o Select alIgnment menu [RX-GAIN], and select
an enna Jac , an une e ransceiver 0
145.995MHz. the CW mode. Inject asignal of level-3 dBp
0 Selectalignment menu [SSB-S9], selectthe (nomodulation), and adjusttheMEMNFO CH
USBmode, and preset the RF control fully control for just 1 segmentindication on the S-
1 k .I.t.1 fl 1+25dB (meter. Thenpressthe MCK/Wkey.
c oc WIse. nJec asIgna 0 eve p no .
~ modulation), thenpressthe MCK/W key. HF BandRXGainAdjustment
~ 144MHz BandSSB-FullScaleAdjustment 0 Connectthesignal generatorto the HF anten-
0 C t th .1t t th 144MH na jack, and tune the transceiver and RF sig-
onnec esIgna genera or 0 e z
..nal generatorto 28.995MHz.
antenna Jack, and tune the transceIver to .
145.995MHz. Selectalignment menu [SSB- 0 Selectalignment menu[RX-GAIN], and select
FULL] d .. t.1 f11+85 dB (the USBmode. Inject a signal of level 0 dBp
, an ffiJecasIgna 0 eve p no
d 1 t.)Th th MCK/W k (nomodulation), and adjusttheMEMNFO CH
mo u a Ion. enpress e ey. control for just1 segmentindication onthe S-
144MHz BandRX GainAdjustment meter. Thenpressthe MCK/W key.
0 Connect the signal generator to the 144MHz 0 Tune the transceiver and RFsignal generator
antenna jack, and tune the transceiver to to 14.005MHz, and selectthe USBmode. In-
145.995MHz. jecta signal of level 0 dBp (no modulation),
3-7 IFT -847 Technical Supplement
I

Alignment
and adjust the MEMNFO CH control for just 1 HF BandPO Meter Adjustment
segment indication on the S-meter. Then press 0 Connect the 50-.0;dummy load to the HF an-
the MCK/W key. tenna jack. Tune the transceiver to 14.005MHz,
0 Tune the transceiver and RF signal generator and select the PM mode.
to 3.505 MHz, and select the USBmode. Inject 0 Select alignment menu [PWR-1 00]. Key the
a signal of level +3 dBp (no modulation), and transmitter, and adjust the RF PWR control
adjust the MEMNFO CH control for just 1 seg- for 100 W indication on the external wattme-
mentindication on the S-meter. Then press the ter. Then press the MCK/W key.
MCK/W key. 0 Select alignment menu [PWR-50]. Key the
SHIFT Control Center Preset transmitter, and adjust the RF PWR control
P h SHIFT 1 th 12 ' 1 kfor 50 W indication on the external wattme-
0 reset t e contro to e -0 c oc po-
.. Sel t 1.t [SFT CTR] d ter. Then press the MCK/W key.
sition. ec a Ignmen menu -, an
h MCK/W k Aft th O t o Select alignment menu [PWR-20]. Key the
press t e ey. er 1S prese proce-
d d h SHIFT t I I rj." 0 transmitter, and adjust the RF PWR control
ure, 0 not turn t e con ro. J you aCC1-
for 20 W indication on the external wattme-
dentally turn it, repeat the above procedure for pre-
.hSHIFT tIter. Then press the MCK/W key.
sethng t e con ro . 0 Select alignment menu [PWR-10]. Key the
RX SSBCarrier Point Adjustment transmitter, and adjust RF PWR control for
0 Tune the transceiver to 145.995 MHz. Select 10 W indication on the external wattmeter.
alignment menu [RXC-PNT], and inject no RF Then press the MCK/W key.
input. Ad...1.9 MHz Band PO Meter Justment
0 Adjust the MEMNFO CH control for Identical
h HF.0 Connect the 50-.0; dummy load to t e an-
"sound" of the noise from the speaker whIle
.. USB d LSB Th tenna jack. Tune the transceiver to 1.910 MHz
swItchIng between an .en press
CK/W k (for verso A, H), 1.850 MHz (for verso B, C, D)
the M ey. or 1.840 MHz (for verso E), and select the CW
TX SSB Carrier Point Adjustment mode.
0 Connect the 50-.0;dummy load to the 144MHz 0 Select alignment menu [PWR-1 00]. Key the
antenna jack, and connect the ammeter be- transmitter, and adjust the RF PWR control
tween the transceiver's 13.8VDC connector for 100 W indication on the external wattme-
and DC power supply. Tune the transceiver ter. Then press the MCK/W key.
to 145.995 MHz, and select alignment menu 0 Select alignment menu [PWR-50]. Key the
[TXC-USB]. transmitter, and adjust the RF PWR control
0 Set "regular" Menu #92 and #93 to "0" if they for 50 W indication on the external wattme-
are not already setto that value. ter. Then press the MCK/W key.
0 Key the transmitter, and adjust the MEMNFO 0 Select alignment menu [PWR-20]. Key the
CH control for minimum indication on the transmitter, and adjust the RF PWR control
ammeter. for 20 W indication on the external wattme-;
,I 0 Select alignment menu [TXC-LSB]. Key the ter. Then press the MCK/W key.
Ii
i transmitter, and adjust the MEMNFO CH con- 0 Select alignment menu [PWR-10]. Key the
c,i" trol for minimum indication on the ammeter. transmitter, and adjust the RF PWR control
:
1;/r j.
: :~ 3-8 FT -847 Technical Supplement
[. ,..
,jl:

-Alignment
for 10 W indication on the external wattme- for 10 W indication on the external wattme-
ter. Then press the MCK/W key. ter. Then press the MCK/W key.
50 MHz Band PO Meter Adjustment ALC Meter Adjustment
0 Connect the 50-.0.dummy load to the 50MHz 0 With the inline wattmeter and 50-.0. dummy
antenna jack. Tune the transceiver to 51.995 load connected to the 144MHz antenna jack,
MHz (for versoA, C, D, H) or 50.295 MHz (for connect the AF generator to the MIC jack. Tune
versoB, E), and select the CW mode. the transceiver to 145.005MHz, and select the
0 Select alignment menu [PWR-1 00]. Key the USB mode.
transmitter, and adjust the RF PWR control 0 Select alignment menu [ALC-1] and inject no
for 100 W indication on the external wattme- microphone input. Key the transmitter, then
ter. Then press MCK/W key. press the MCK/W key. Now adjust the MEMI
0 Select alignment menu [PWR-50]. Key the VFO CH control for a (hexadecimal data) "+4"
transmitter, and adjust the RF PWR control indication on the display.
for 50 W indication on the external wattme- 0 Select alignment menu [ALC-9] and inject a 1
ter. Then press the MCK/W key. kHz tone signal of level 3 mV to the MIC jack.
0 Select alignment menu [PWR-20]. Key the Key the transmitter, and adjust the MIC con-
transmitter, and adjust the RF PWR control trol for just 1 segment indication on the ALC
for 20 W indication on the external wattme- meter.
ter. Then press the MCK/W key. 0 Without touching the setting of the MIC con-
0 Select alignment menu [PWR-10]. Key the trol, inject a 1 kHz tone at 10 mV to the MIC
transmitter, and adjust the RF PWR control jack. Then press the MCK/W key.
for 10 W indication on the external wattme- 144MH B d TXAd '
z an Justment
ter. Then press the MCK/W key. W.hh.1.
0 It t e m me wattmeter and 50-.0. dummy
144/430MHz BandPO Meter Adjustment load connected to the 144M Hz antenna jack,
0 Connect the 50-.0.dummy load to the 144MHz connect the AF generator to the MIC jack (pin
antenna jack. Tune .the transceiver to 145.995 8: mic input, pin 7: ground). Tune the trans-
MHz, and select the PM mode. ceiver to 145.995 MHz, and select the USB
0 Select alignment menu [PWR-1 00]. Rotate the mode. Preset the MIC control to the I-o'clock
MEMNFO CH control to selectthe (hexadeci- position.
mal data) value of "FF". 0 Selectalignment menu [TX-GAIN] and inject a
0 Select alignment menu [PWR-50]. Key the 1 kHz tone at 1 mV level to the MIC jack. Key
transmitter, and adjust the RF PWR control the transmitter, and adjust the MEMNFO CH
for 50 W indication on the external wattme- control for 25 Won the external wattmeter. If
ter. Then press the MCK/W key. the hexadecimal data on the transceiver's dis-
0 Select alignment menu [PWR-20]. Key the play is lessthan "8FH", turn the MEMNFO CH
transmitter, and adjust the RF PWR control control for just "8FH" indication on the display.
for 20 W indication on the external wattme- 430 MHz Band TX Adjustment
ter. Then press the MCK/W key. 0 W 'th th .1.tt t d50 .0.d.1 e m me wa me er an -ummy
0 Select alIgnment menu [PWR-10]. Key the 1 d t d t th 430MH t .
koa connec e 0 e z an enna Jac ,
transmitter, and adjust the RF PWR control 3-9
FT-847 Technical Supplement

~
Alignment
connect the AF generator to the MIC jack (pin hexadecimal data on the transceiver's display
8: mic input, pin 7: ground). Tune the trans- is lessthan "8FH", turn the MEMNFO CH con-
ceiver to 439.995 MHz, and select the USB trol for just "8FH" indication on the display.
mode. Preset the MIC control to the I-o'clock 0 Tune the transceiver to 14.005MHz and inject
position. 1 mV at 1 kHz tone to the MIC jack. Key the
0 Select alignment menu [TX-GAIN] and inject a transmitter, and adjust the MEMNFO CH con-
I kHz tone at 1 mV level to the MIC jack. Key trol for 50 W on the inline wattmeter. If the
the transmitter, and adjust the MEMNFO CH hexadecimal data on the transceiver's display
control for 25 W on the external wattmeter. If is lessthan "8FH", turn the MEMNFO CH con-
the hexadecimal data on the transceiver's dis- trol for just "8FH" indication on the display.
play is less than "8FH", turn the MEMNFO CH 0 Tune the transceiver to 1.910 MHz (for verso
control for just "8FH" indication onthe display. A, H), 1.850 MHz (for verso B, C, D) or 1.840
50 MHz Band TX Adjustment MHz (for verso E), and inject 1 mVat 1 kHz
0 W.th th . 1 . tt t d 50 0 d tone to the MIC jack. Key the transmitter, and
1 e m me wa me er an -ummy
1 d t d h SOMH . k adjust the MEMNFO CH control for 50 W on
oa connec e to t e z antenna Jac ,
t th AF t t th MIC . k ( .the inline wattmeter. If the hexadecimal data
connec e genera or 0 e Jac pm
8 .. t . 7 d) T th t on the transceiver's display is less than "8FH",
: mic mpu , pm : groun .une e rans-
.51 995 MH (f A C D H) turn the MEMNFO CH control for just. "8FH"
ceiver to. z or verso , " or
50.295 MHz (for versoB, E), and selectthe USB indication on the display.
mode. Preset the MIC control to the I-o'clock 5WRMeter Adjustment
position. 0 With the inline wattmeter and 50-0 dummy
0 Select alignment menu [TX-GAIN] and inject a load connected to the HF antenna jack, select
1 kHz tone at 1 mV level to the MIC jack. Key the CW mode. Tune the transceiver to 14.005
the transmitter, and adjust the MEMNFO CH MHz. Select alignment menu [SWR 1.5].
control for 50 W on the external wattmeter. If 0 Key the transmitter, and adjust the RF PWR
the hexadecimal data on the transceiver's dis- control for 10 W on the external wattmeter.
play is less than "8FH", turn the MEMNFO CH 0 Replace the 50-0 dummy load with a 100-0
control for just "8FH" indication on the display. dummy load (two 50-0 loads in parallel) con-
HF Band TX Ad 'ustment nectedto the HF antenna jack.
JOKey the transmitter, and press the MCK/W key.
0 With the inline wattmeter and 50-0 dummy R d 1 d .h h 50-0.0 eplace the 100-0 ummy oa wIt t e
load connected to the HF antenna Jack, connect
MIC . k ( . 8 .dummy load connected to the HF antenna jack,
the AF generator to the Jac pm : miC d1 1.[SWR 3 0]an se ect a Ignment menu ..
input, pin 7: ground). Select alignment menu K.d d .h RF PWR
[TX-GAIN], and select the USB mode. Preset the 0 ey the transmItter, an a Just t e
control for 50 W on the inline wattmeter.
MIC control to the 1-0'clock position. .0 Re lace the 50-0 dummy load with the 150-0
0 Tune the transceiver to 28.995 MHz and inject dp1 d ( hr 50 0.II 1)t thummy oa or t ee -s m para e 0 e
a1 kHz tone at1 mV level to the MIC jack. Key H.
Fantenna Jack.
the transmitter, and adjust the MEMNFO CH 0Kh.d th MCK/W key t e transmItter, an press e ey.
control for 50 W on the inline wattmeter. If the
3-10 FT-847TechnicalSupplement
imj~..-

Alignment
mode, and inject a 1 kHz tone at 1 mV level to
the MIC jack. Key the transmitter, and adjust
VRI005 for at least a 5-segment indication on
the ALC meter.
,t
:' AF generator to the MIC jack (pin 8: mic input, Carrier Balance Adjustment
Pin 7: ground). Tune the transceiver to 145.995 0 C t th RF tt t ( 50 ndonnec e a enua or or -~~ ummy.I
MHz and selectthe FM mode. Iddo
, oa an samplmg coupler) and spectrum an-
(J InJoecta 1 kHz tone at 15 mV level. Key the al t th 144MH t ok T hyzer 0 e z an enna Jac .une t e
transmitter, and adjust VRI004 for ::1:4.5kHz t.t 145 995 MH IhUSBranscelver o. z, se ect t e
deviation on the linear detector. d d .. toh0
mo e, an mJec no mlcrop one mput.
D Select the 88.5 Hz (default) subaudible tone, 0 K th t .tt d d ot VRI007 fey e ransml er, an a Jus or
and activate CTCSSEncode operation. Key the mOO' I k ( hld bt Imlmum carner ea age s ou e a east
transmitter, and adjust VRI003 for ::1:0.7kHz 45 dB bI.t.tt d he ow a carrIer ranSD1l e on t e same
deviation on the linear detector. fr ).d.t d th Iequency asmIca e on e ana yzer.
Speech Processor Adjustment 0 Select the LSB mode, and again inject no mi-
D With the inline wattmeter and 50-0 dummy crophone input. Key the transmitter, and con-
load connected to the 144MHz antenna jack, firm that the carrier leakage is at least 45 dB
connect the AF generator to the MIC jack (pin down, as indicated on the analyzer.
8: mic input, pin 7: ground). Tune the trans- 50 MHz band Power Re-adjustment
ceiver to 145.995 MHz, select the USB mode, (for French version)
and leave the PROC switch off for now. 0 With the inline wattmeter and 50-0 dummy
D Inject a1 kHz tone at1 mV level. Key the trans- load connected to the 50MHz antenna jack,
mitter, and adjust the MIC control for 12.5 W tune the transceiver to 50.295MHz, and select
on the wattmeter. the FM mode.
D Switch PROC on, key the transmitter, and ad- 0 Key the transmitter, and adjust VR3004 for 10
just VRI002 for 25 W on the wattmeter. Won the inline wattmeter.
Carrier Level Adjustment 1.9 MHz band Power Re-adjustment
0 Connect the 50-0 dummy load to the HF an- (for Belgian version)
tenna jack. Tune the transceiver to 1.910MHz 0 With the inline wattmeter and 50-0 dummy
(for versoA, H), 1.850 MHz (for versoB, C, D) load connected to the HF antenna jack, tune
or 1.840MHz (for versoE), selectthe CW mode, the transceiver to 1.850 MHz, and select the
and set PROC off. Selectthe TX meter to read FM mode.
ALC. Preset VRI006 fully clockwise. 0 Key the transmitter, and adjust VR3005 for 10
0 Connect the AF generator to the MIC jack (pin Won the inline wattmeter.
8: mic input, pin 7: ground). Select the AM,!
3-11
FT -847 Technical Supplement
1