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Icom IC-728 IC-729 user manual

1. TRANSMIT is Output power is too low No contact possible with another station Repeater cannot be ac cessed Transmitted signals are DISPLAY distorted The displayed frequency does not change properly Frequency changes while transmitting Scan does not stop Programmed scan does not start Selected mode memory scan does not start TROUBLESHOOTING 8 EN e AM or FM mode is selected without an e Transmitting in AM and FM modes re optional Ul 7 AM FM UNIT in the quires an optional Ul 7 AM FM UNIT IC 728 for the IC 728 e The operating frequency is not set to Set the frequency to a ham band a ham band e RF PWR is set too far counter e Rotate RF PWR clockwise clockwise e MIC GAIN is set too far counter Set MIC GAIN to a suitable position clockwise e The antenna is not connected properly Reconnect the antenna connector e The antenna feedline is cut or shorted Check the feedline and correct any im proper conditions e An antenna for another band is con Connect an antenna suitable for the nected operating frequency eThe antenna is not properly tuned Push TUNE to retune the antenna when using an optional AH 3 e RIT function is activated e Push RIT to turn the function OFF e Split function is activated e Push SPLIT to turn the function OFF e Split function is not activated e Push SPLIT to turn
2. The carrying handle facilitates carrying and transport ing of the transceiver Attach the MB 23 as shown in the figure at left NOTE Supplied screws with the MB 23 CANNOT be used with the IC 728 729 Please use the screws supplied with the IC 728 729 to correctly attach the MB 23 I q eit A A e e OPTIONS INSTALLATION 7 The FL 100 and FL 101 CW narrow filters provide CW 1 Remove the bottom cover Narrow mode reception 2 Insert the filter at the proper position The loca tion is shown in the figure at left e The filter works regardless of which direction it is in serted in 3 Replace the cover FL 100 500 Hz 6 dB FL 101 250 Hz 6 dB By replacing the original crystal unit with this unit the CR 64 frequency stability 0 5 ppm total frequency stability of the transceiver will be im 30 C 60 C 22 F 140 F 1 Remove the covers and the PLL unit following the disassembly procedures on pgs 35 36 2 Remove the regular crystal from the PLL unit 3 Unsolder the 4 positions on the PLL unit where the CR 64 will be installed e Use a de soldering braid 4 Install the CR 64 in the PLL unit paying attention to orientation e Symbols on the bottom of the CR 64 must be identi cally matched with symbols on the P C board 5 Bend the leads of the CR 64 at the foil side of the P C board and solder them 6 Trim the leads even with the solder points 7 Replace th
3. HEADPHONE JACK PHONES p 21 Accepts headphones e Headphones with 4 16 Q impedance can be used e When headphones are connected the internal speaker does not function EZL Power ON I Transmitting MICROPHONE CONNECTOR MICROPHONE Accepts the supplied microphone e An optional Icom desktop microphone can be used e See p 8 for microphone connector information NOISE BLANKER SWITCH NB p 21 Turns the noise blanker ON and OFF H o ML ON FUNCTION The noise blanker reduces pulse type noise such as that generated by automobile ignition systems This function is not available for AM and FM or non pulse type noise A Rn SON A er See pgs 3 4 DOWN MEMO UP ATTENUATOR SWITCH ATT p 21 Turns the 20 dB attenuator ON and OFF Ho N ON FUNCTION The attenuator prevents the desired signal from distort ing when very stong signals are near the desired frequency or when very strong electric fields from a broadcasting sta tion are near your location PREAMP SWITCH PREAMP p 21 Turns the preamp ON and OFF OFF ML ON FUNCTION The preamp amplifies received singals in the front end circuit to improve the S N ratio and sensitivity Turn this function ON when receiving weak signals AGC SWITCH AGC p 21 Changes the time constant of the AGC circuit m AGC slow FUNCTION The AGC controls receiver gain to produce a constant au dio output level even
4. RTTY RECEIVING External equipment is necessary 1 Turn power ON with POWER 2 Select VFO A or VFO B with VFO 3 Select LSB with SSB 4 Set the desired frequency with the main dial 5 Adjust the audio output level with AF GAIN OPERATION 3 Convenient functions for SSB receiving e NB Noise Blanker e ATT Attenuator e PREAMP Pre ampilifier e AGC Auto Gain Control e PBT Passband Tuning e RIT Receiver Incremental Tuning e LOCK Dial lock e SQUELCH Convenient functions for CW receiving e NB Noise Blanker e ATT Attenuator e PREAMP Pre amplifier e AGC Auto Gain Control e PBT Passband Tuning e RIT Receiver Incremental Tuning e LOCK Dial lock e SQUELCH e CW Narrow mode An optional CW filter is necessary Convenient functions for AM receiving e ATT Attenuator e PREAMP Pre amplifier eAGC Auto Gain Control e RIT Receiver Incremental Tuning eLOCK Dial lock e SQUELCH e AUTO TUNING STEP p 20 Convenient functions for FM receiving e SQUELCH e ATT Attenuator PREAMP Pre amplifier e RIT Receiver Incremental Tuning e LOCK Dial lock e AUTO TUNING STEP p 20 Operating notes for RTTY receiving e RTTY operating frequency differs from the displayed fre quency Refer to the following formula Your RX freq Displayed freq 2125 Hz when the frequencies of your RTTY demodulator are mark 2125 Hz and space 2295 Hz 22 o
5. elf SQUELCH is rotated too deeply clockwise the squelch will not open for weak signals hear oS a FT nee weenie ation u s u aa t RadioAmateur EU E Mode types VFO Memory The IC 728 729 has two VFOs which both receive and transmit in the VFO mode The VFOSs are called VFO A and VFO B This dual VFO system provides tremen dous operating flexibility VFO mode The IC 728 729 has 26 memory channels in the memory mode for storing your often used frequencies and operating modes See pgs 29 30 for the memory mode operation Memory mode MEMO e The differences between the VFO mode and the memory mode VFO MODE Each VFO has a frequency and operating mode If the frequency or operating mode is changed the VFO automatically memorizes the new frequency or new operating mode When the VFO is selected from another VFO or the memory mode the last used frequency and operat ing mode for that VFO appear EXAMPLE VFO A is selected The frequency is changed VFO B is selected VFO A is selected again MEMORY MODE pgs 29 30 Each memory channel has a frequency and operat ing mode like a VFO Even if the frequency or mode is changed the memory channel does not memo rize the new frequency or operating mode When the memory channel is selected from another memory channel or the VFO mode the memorized frequency and operating mode appear EXAMPLE Memory channel
6. C e Frequency stability 50 C 32 F 122 F less than 350 Hz e Power supply 13 8 V DC 15 requirement e Current drain Transmit 20 A at 13 8 V DC Receive squelched 13A max audio output 1 6 A e Dimensions 241 W x 94 H x 239 D mm 9 5 W x 3 7 H x 9 4 D in projections not included Weight IC 728 4 6 kg 10 1 Ib IC 729 4 9 kg 10 8 ib 4 W TRANSMITTER eOutput power s 1 8 30 MHz SSB CW FM 100W AM 40 W 50 54 MHz SSB CW FM 10W IC 729 only AM 4W e Spurious emissions 1 8 30 MHz Less than 50 dB 50 54 MHz Less than 60 dB IC 729 only e Carrier suppression More than 40 dB e Unwanted sideband More than 50 dB e Microphone 600 Q impedance E RECEIVER e Receive system SSB CW AM FM Triple conversion superheterodyne An optional UI 7 is required for the IC 728 e Intermediate frequencies z Rn peas a sa ues 70 4515 MHz 9 0115 MHz 455 kHz 70 4506 MHz 9 0106 MHz 455 kHz AM FM 70 4500 MHz 9 0100 MHz 455 kHz e Sensitivity Preamp ON 0 5 1 8 MHz AM Less than 13 0 y V for 10 dB S N 3826656852 21 et ER 1 8 30 MHz SSB CW Less than 0 16 uV for 10 dB S N AM Less than 2 0 uV for 10 dB S N FM 28 30 MHz Less than 0 5 uV for 12 dB SINAD 50 54 MHz IC 729 only SSB CW Less than 0 13 uV for 10 dB S N AM Less than 2 0 uV for 10 dB S N FM Less than 0 3 uV for 12 dB SINAD SSB CW More
7. E Transmitting 23 E RIT and AfP 25 WE PBT operation REY 25 H Split frequency operation 26 E Cross mode operation 26 E Optional antenna tuner operation 27 4 MEMORY CHANNELS a 29 32 B Memory channels 29 Ml Memory channel selection 29 E Memory channel programming 30 MB Frequency transferring 31 Bl Programming split memory channels for accessing a repeater 32 TABLE OF CONTENTS 5 SCANS ile 33 34 El Scan types A ease ET AAE 33 E Pre operati9f usan cece ale 33 Programmed scan operation 34 M Memory scan operation 34 E Selected mode memory scan operation 34 6 MAINTENANCE AND ADJUSTMENT 35 40 E Disassembling the transceiver 35 Ml Fuse replacement 37 M Resetting the CPU 37 E CPU backup battery 37 M Frequency calibration approximate 38 E Main dial brake adjustment 38 A z 2 ua ani encarta eae 38 M CW side tone level preset 39 Bg Advanced scan f
8. Set SQUELCH open or closed e See page at left for scan condition 2 Push FUNC then push MEMO to start the scan e The memory mode is automatically selected 3 When the scan detects a signal the scan pauses or ignores it depending on the squelch condition LOCK should be in the OUT position To change the scan type to selected mode memory 4 To cancel the scan rotate the main dial or push scan while scanning push LOCK IN VFO A B MEMO or MW D Set squelch NW Selected mode memory scan operation Selected mode memory scan can be started in either the VFO mode or the memory mode Stop Start 1 Set SQUELCH open or closed e See page at left for scan condition 2 Select the desired operating mode then push LOCK IN 3 Push FUNC then push MEMO to start the scan Push LOCK IN e The memory mode is automatically selected O Setequeleh O Select operaling mode 4 When the scan detects a signal the scan pauses or ignores it depending on the squelch condition The operating mode can be changed while scanning e When a mode is not memorized in 2 or more selected 5 To cancel the scan rotate the main dial or push memory channels the scan is canceled VFO A B MEMO or MW 34 PS TYT TT usss asna Y 35 MAINTENANCE AND ADJUSTMENT E Disassembling the transceiver Follow the transceiver disassembly procedures shown here when yo
9. on the function display when this switch s setting is changed e e No function for the AT 150 and IC AT500 Either posi tion is acceptable for these tuners When the POWER switch is pushed IN these terminals are shorted to control the connected DC power supply AH 3 JW AT 160 Rear panel view CI V REMOTE CONTROL JACK pgs 15 16 ANTENNA CONNECTORS HF 50 M p 9 Accepts a 50 antenna with a PL 259 plug to each connector e The IC 728 has only the HF antenna connector Designed for use with a PC for remote operation of transceiver functions TECHNICAL INFORMATION e ACC SOCKETS Rear panel view aD Sp BOS le BS 0 ACC 1 SOCKET ACC 2 SOCKET ACC 1 SOCKET ere E Or on x Nocomecion GND Connects to ground Input output pin Ground level 0 5 0 8 V Goes to ground when transmitting Input current Less than 20 mA When grounded transmits Connected in parallel with ACC 2 pin 3 MOD Modulator input Input impedance 10kQ Connects to a modulator Input level Approx 100 mV rms AF AF detector output Output impedance 4 7 kO Fixed regardless of AF position Output level 100 350 mV rms SQLS Squelch output SQL open Less than 0 3 V 5 mA Goes to ground when squelch opens SQL closed More than 6 0 V 100 yA Output current Max 1A 13 8 V 13 8 V output when power is ON Connected in parallel with ACC 2 pin 7 Control voltage 4 0V ALC voltage input Input impe
10. 1 is selected The frequency is changed Another memory channel is selected Memory channel 1 is selected again 18 usan gc Stitt ote awaqa kath eaten ianea pia p 3 OPERATION E Frequency setting eFor ham band use 1 Push VFO to select the VFO mode e Then push VFO again to change to VFO A or VFO B VEO A or VFO B appears USB it AUTO FUT VEO A I Po LILA I 2 Push BAND y Y band change indicator appears 3 Rotate the main dial to select the desired band These digits change I porede rY uH sss These digits and the operating mode are also changed by the band stacking register 4 Push BAND again y Y disappears eFor general coverage receiver use 1 Push VFO to select the VFO mode e Then push VFO again to change to VFO A or VFO B VFO A or VFO B appears 3 Rotate the main dial to select the desired band These digits change 4 Push MHz again Y disappears NOTE If LOCK has been pushed IN the main dial is locked and does not function FUNCTION The band stacking register stores a frequency and an oper ating mode on each band If the ham band is changed the last used frequency and operating mode for the newly selected band automatically appear This function is convenient for band switching in contests and for quick monitoring of propagation conditions on other bands BA
11. 10 ZHW 00 10 6 ASN VECO fpe ZHIN 09010 6 038 1 M J aoedS o 81 ZHW 00010 6 dS1 81 lutod yoayo bal O48 9934 pe aeos in sajalu S OL Ly pe 6S Jajau S 911y In Sy 104 Bdeds O LN ey 10 oeds UONDBUUOD 0 1N 404 yun UOJ ay UO SF uono uuo2o 1N 9U 104 Ler tun 71d 84 uo ZLF WOI HF uono uuoo Bu 104 zar pe AA OL samod ult g0ZH pe AA 001 4emod xew 0L ZH UN 114 W014 Sr pe jana auo pis MO BETH tun yd wota LLP uun yd Wos4 ZIP midst iaaa A ra te DKK Z KF H I YI aLIEN ISHII II II II I IAI III I II I aa aea a ETE e A A A a EA P TIN Cylua lI lq e RAA aaae a Im A I e e tt A circa amaa ee e A aa aa O a rae T INSIDE VIEWS 9 t E 1C 728 PLL un yun urew ay UO pf OL zir wun Sad Hun O9A Wun urew ay uo sr ol ELL 46 A A A a RS RINA o2 Y9 49 ul 10 oeds pe ll 0Zy Asayeq dnxoeg 118 Nd9 891 xew Spolp A 1D yor ojluoo louu i A I BF pe Aouanba p9 Yy9 VELO 9 INSIDE VIEWS in uni E IC 729 ma uonoauuos 0 1n 104 yun judd ay UO CF uN 71d eu uo zif wos pr 101 114 40 001 714 34 10 adeds julod x08yo bal O49 t8LH pe ZHIN O9010 6 L MO 87 o39 HNW 000L0 6 8s1 281 ZHN O0 10 6 gS n t6z0 pe AA OL 4amod ZHW OS LLby pe AA 001 4emod xew dH OLZH pe AA OL samod ul 4H 8034 pe ajeos n 19 9u S OL Ly
12. PBT Passband Desired signal Interference a ed ae o sa ac eto an fe A A then tient tein ened a E Split frequency operation Split frequency operation allows you to transmit and receive on two different frequencies The split frequency operation is basically performed us ing 2 frequencies on VFO A and VFO B Following is a basic example for setting 21 250 MHz for receiving and 21 360 MHz for transmitting 1 Select VFO A then set 21 250 MHz USB in VFO A USB 2 I I r FIFA VFOA I L AL ALLI I 3 Select VFO A then push SPLIT e SPLIT appears USB LA Him T ILILI spurt i SPLIT appears Now you can receive on 21 250 MHz and transmit on 21 360 MHz eThe function display shows 21 250 while receiving and 21 360 while transmitting To change the transmit and receive frequencies push VFO to exchange VFOs E Cross mode operation Cross mode operation allows you to transmit and receive on two different operating modes Set the same frequency but different modes in VFO A and VFO B While receiving While transmitting OPERATION 3 NOTE The IC 728 729 has 2 split memory chan nels memory channel 23 and 24 which store 2 fre quencies for split frequency operation for details See p 32 PRACTICAL EXAMPLE When you find a DX station on 14 195 MHz USB and the station says UP 10 kHz for our calling frequency
13. PWR 4 Push and hold the PTT switch on the microphone and speak into the microphone CW TRANSMITTING An external CW keyer is necessary 1 Set for CW receiving 2 Set the frequency in your allowed frequency range for CW transmitting 3 Set the desired RF output power with RF PWR 4 Push the key down and start CW transmitting AM TRANSMITTING The IC 728 requires the Ul 7 unit 1 Set for AM receiving 2 Set the frequency in your allowed frequency range for AM transmitting 3 Set the desired RF output power with RF PWR 4 Push and hold the PTT switch on the microphone and speak into the microphone FM TRANSMITTING The IC 728 requires the Ul 7 unit 1 Set for FM receiving 2 Set the frequency in your allowed frequency range for FM transmitting 3 Set the desired RF output power with RF PWR 4 Push and hold the PTT switch on the microphone A and speak into the microphone RTTY TRANSMITTING External equipment is necessary 1 Set for RTTY receiving LSB should be selected 2 Set the frequency in your allowed frequency range for RTTY transmitting 3 Set the desired RF output power with RF PWR 4 Push TRANSMIT IN or send a TX control signal then start transmitting your RTTY signal OPERATION 3 Operating notes for SSB transmitting e MIC GAIN should be set correctly When using a non Icom microphone set MIC GAIN referring to SETTING PROCEDURE described on the left
14. Push TUNER to activate the AT 160 e The AT 160 presets the antenna for the displayed band e TUNE appears When you start transmitting the AT 160 automatically tunes the antenna To tune the antenna manually push and hold TUNER for 1 sec e TUNE blinks and CW appears while tuning To bypass the AT 160 manually push FUNC then push TUNER e THRU appears NOTE TUNE blinks irregulary during transmis sion if the AT 160 cannot tune the connected anten na In this case it is necessary to push and hold TUNER for 1 sec to re tune the antenna See the instruction manual included with each antenna tuner Either position of the tuner selection switch is acceptable for these tuners pesa DY a ae e s sasa il ii ig te i f MEMORY CHANNELS E Memory channels The IC 728 729 has 26 memory channels The memory mode is very useful for quickly changing to often used frequencies Memory channels 1 22 can be programmed with one frequency and one mode in each memory channel Memory chanrrels 23 26 also have the special func tions described in the diagram at right E Memory channel selection 1 Push MEMO to select the memory mode 2 Push UP or DOWN on the front panel several times to select the desired memory channel e UP and DN on the microphone also select memory channels 3 To return to the VFO mode push MEMO agai
15. is con nected eThe antenna is not properly tuned when using an optional AH 3 e The attenuator function is activated e The operating mode is not selected correctly ePBT function is activated e Noise blanker function is activated e Preamp is activated e Reconnect the power cable correctly e Check for the cause then replace the fuse with a spare one Fuses are installed in two places One is installed in the DC power cable and the other is installed in the PA unit eCheck the battery voltage with the POWER switch pushed IN e Rotate AF GAIN clockwise to obtain a suitable listening level e Rotate SQUELCH counterclockwise to open the squelch e Push TRANSMIT OUT or check the SEND line of the external unit if con nected e Check the external speaker or head phone plug connection e Check the speaker ON OFF switch or speaker A B switch when an optional SP 20 EXTERNAL SPEAKER is in use e Receiving in CW Narrow mode re quires an optional FL 100 or FL 101 CW narrow filter e Receiving in FM mode requires an op tional Ul 7 AM FM UNIT for the IC 728 e Reconnect the antenna connector e Check the feedline and correct any im proper conditions e Connect an antenna suitable for the operating frequency e Push TUNE to retune the antenna e Push ATT OUT e Select a suitable operating mode e Set PBT to the center position e Push NB OUT e Push PREAMP OUT
16. or PTT switch when the CW keyinON Then automatically returns to receive when the CW key is OFF The IC 728 729 is equipped with a semi break in system mm ON CW BREAK IN DELAY CONTROL DELAY p 24 Adjusts the transmit to receive switching delay time for the CW break in operation Short delay for y Long delay for fast speed CW slow speed CW _ Set delay time depending on the CW speed or your preference CW KEY JACK KEY p 10 Accepts a straight key or electronic keyer with a stan dard 1 4 inch 3 conductor plug acres part ACCESSORY SOCKETS ACC 1 and 2 Enables connection to external equipment such as a linear amplifier an automatic antenna tuner TNC for data communications e See the page at right for socket information ALC INPUT JACK ALC p 12 Connects to the ALC output jack of a non Icom linear amplifier e See p 2 for the ALC function SEND CONTROL JACK SEND p 12 Goes to ground while transmitting to control exter nal equipment such as a linear amplifier TUNER CONTROL SOCKET TUNER p 13 Accepts the control cable from the optional AH 3 or AT 160 antenna tuner hens pe saa iaei a aR RAR A been PANEL DESCRIPTION 1 DC POWER SOCKET DC 13 8V p 11 TUNER SELECTION SWITCH p 13 Accepts 13 8 V DC through the supplied DC power Selects the connected antenna tuner AH 3 or cable AT 160 e AH 3 or AT 160 appears for 1 sec
17. page Convenient functions for SSB transmitting e COMP Speech compressor Operating notes for CW transmitting The break in function automatically starts transmitting when the key is down and then returns to receive If you want to switch transmitting receiving manually turn the break in function OFF with the BK IN switch on the rear panel Convenient functions for CW transmitting e Break in delay time adjustment by the DELAY control on the rear panel e CW side tone level preset See p 39 for details Operating notes for AM transmitting e MIC GAIN should be set correctly When using a non Icom microphone set MIC GAIN by monitoring another receiver Convenient functions for AM transmitting e COMP Speech compressor Operating notes for FM transmitting e MIC GAIN should be set correctly When using a non Icom microphone set MIC GAIN by monitoring another receiver Convenient functions for FM transmitting e COMP Speech compressor e FM TONE Subaudible tone Operating notes for RTTY transmitting e RTTY operating frequency differs from the displayed fre quency Refer to the following formula Your TX freq Displayed freq 2125 Hz when the oscillated frequencies of your AFSK generator are mark 2125 Hz and space 2295 Hz Frequency setting example for RTTY transmitting When operating at 14 090 MHz Set LSB 14 0921 and input 2125 Hz mark and 2295 Hz space AFSK sig
18. pe 6S 1919uu S 9L LH MUN 71d W014 Sr pe ian uol1 OPIS AO BETH HUN NANY I1 _ P n r rr 0 1N au 10 oeds un yd wos4 iir uun vd W014 498e q payew zir un Vd o y pai payiew er ioe sk maemo dae aa BAE aama a AE A HS RAI tin nya nn al and RAIL O pein 47 INSIDE VIEWS 9 Downloaded by EL 3 Q p lt y y x W IC 729 PLL uni jun urew ay uo pf 01 zir wun saa uun ODA tun urew y uo Gf OL err 48 pe Aouenbey 79 YO VELO ES 79 HO ayi 10 aoeds pe 118 OLY Asayeq dnyoeg 119 Nd 891 XLJeu POP A 1D yore onuoo louu 1 N 19 8r nse RAT iA st Indes ASA I dn a nt Bs A qD rum 49 10 Mi GENERAL e Frequency coverage Receive 500 kHz 30 MHz 50 MHz 54 MHz IC 729 only SPECIFICATIONS Transmit 1 800 1 99999 MHz 3 500 4 000 MHz 7 000 7 300 MHz 10 100 10 150 MHz 14 000 14 350 MHz 18 068 18 168 MHz 21 000 21 450 MHz 24 890 24 990 MHz 28 000 29 700 MHz 50 000 54 000 MHz IC 729 only e Mode SSB CW AM FM An optional Ul 7 is required for the IC 728 e Number of memory 26 channels e Antenna impedance 50 Q nominal e Usable temperature 10 C 60 C range 14 F 140 F Less than 200 Hz from 1 min to 60 min after power ON After that the rate of stability change is less than 30 Hz hr at 25 C 77 F Temperature fluctuations 0
19. than 2 1 kHz 6 dB Less than 4 0 KHz 60 dB AM More than 6 0 kHz 6 dB Less than 20 0 kHz 40 dB FM More than 12 kHz 6 dB Less than 30 kHz 50 dB e Selectivity e Spurious and image More than 70 dB rejection ratio e Audio output power More than 2 6 W with an 8 Q load e RIT variable range 11 2 kHz All stated specifications are subject to change without notice or obligation A A A A IC 4KL HF 1 kW LINEAR AMPLIFIER This is an all solid state full duty 1 kW linear amplifier The IC 4KL is fully con trolled from the 1C 728 729 No need to tune and no need to switch the operat ing band Full break in operation is possible The amplifier power supply unit and the remote control unit are separated Place the amplifier power supply unit under your operating desk IC AT500 HF AUTOMATIC ANTENNA TUNER 500 W automatic antenna tuner best match for the IC 728 729 with the IC 2KL Including an automatic antenna selector for 4 separate antennas AH 3 HF AUTOMATIC ANTENNA TUNER Matches the 1C 728 729 to a long i wire antenna for portable or mobile operation x e Input power rating 150 W AT 160 HF AUTOMATIC ANTENNA TUNER Can be attached to the IC 728 729 side panel Power and tuning oper ation is controlled through the IC 728 729 i AH 2b ANTENNA ELEMENT A 2 5 m long antenna element for mobile operation with the AH 3 UN OPTIONS 11 MN IC 2KL HF 500 W LINEAR AM
20. transceiver contro using a personal computer equipped with an RS 232C output port You can change frequencies operating mode memory channels etc via your computer keyboard Ul 7 AM FM UNIT Provides AM transmitting and FM transmitting receiving for the IC 728 MB 23 CARRYING HANDLE Carrying handle tor easy portable operation For MB 23 use some screws are supplied with the transceiver AAA AA OPTIONS 11 CR 64 HIGH STABILITY CRYSTAL UNIT Contains a temperature compensating oven heater and crys tal unit for improved frequency sta bility e Frequency stability 0 5 ppm 30 C 60 C 22 F 140 F UT 30 PROGRAMMABLE TONE ENCODER UNIT mene ms Provides 38 programmable subaudi ble tones HM 12 HAND MICROPHONE Same type as supplied with the IC 728 729 OPC 025A DC POWER CABLE Same type as supplied with the IC 728 729 Downloaded by RadioAmateur EU A O TSH Sass tokens Rn tose nett ets Hin creenertemap ti Count on us A 5196S 1EX Printed in Japan Copyright 1992 by Icom Inc i rsru rt U lt lt n rr aaaasusa CE ep rere rE AE E HH oc SSS PO A As Icom Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan sabes Ae nie te Ae ARO rc 2
21. when the received signal strength is varied by fading etc Use AGC slow for normal oper ation and select AGC fast depending on the receiving con dition AGC does not function in FM mode J AGC fast SecA in Abana ut mein a A adaa AE etn hn Nh tthe he ein tama mite assia gS SPEECH COMPRESSOR SWITCH COMP p 23 Turns the speech compressor ON and OFF e The compressing level must be adjusted properly See for details ML or FUNCTION The speech compressor compresses the audio input to increase the average audio output level Therefore talk power is increased This function is effective for long dis tance communication or when propagation conditions are poor SL ON SPEECH COMPRESSION LEVEL CONTROL LEVEL p 23 Adjusts the compression level e This control is available only when the speech compres sor is ON Recommended level mT Decreases increases LEVEL RF POWER CONTROL RF PWR p 23 Continuously varies the RF output power from mini mum to maximum Decreases O Increases RF PWR gt Min RF output Max RF output Max RF output output 100 W 10 W For the IC 729 2 An optional Ul 7 AM FM UNIT is required for the IC 728 HE MODE SWITCHES pgs 21 23 Select the desired operating mode selects USB and LSB alternately selects normal CW and CW Narrow al ternately e An optional FL 100 or FL 101
22. 1 Push A B e The rear VFO frequency and operating mode is equalized to the displayed VFO frequency and mode 2 Rotate the main dial to set the displayed frequency to 14 205 MHz e 14 195 MHz 10 kHz 14 205 MHz 3 Push VFO to exchange the VFOs e The transmit frequency is set to 14 205 MHz and the receive frequency is set to 14 195 MHz 4 Push SPLIT to select split frequency operation e SPLIT appears 5 Push and hold the PTT switch and call after the DX sta tion is standingby 1 Set the operating frequency on VFO A or VFO B 2 Push A B to equalize rear VFO frequency to the displayed VFO frequency 3 Select the mode for transmitting on the displayed VFO 4 Push VFO to change the VFO then select the mode for receiving on the newly displayed VFO 5 Push SPLIT to turn the split function ON 27 3 OPERATION E Optional antenna tuner operation AH 3 HF AUTOMATIC ANTENNA TUNER The AH 3 matches the IC 728 729 to an antenna more than 3 m 10 ft long 3 5 MHz and above or more than 12 m 40 ft long 1 8 MHz and above e See p 13 for the transceiver and AH 3 connection e See the AH 3 instruction manual for AH 3 installation and antenna connection details AH 3 setting example For mobile operation Optional AH 2b antenna element WARNING HIGH VOLTAGE NEVER touch the antenna element while tuning or transmitting CAUTIONS BE SURE to push the tu
23. CE AND ADJUSTMENT E CW side tone level preset CW side tone output can be controlled by AF GAIN If you want to change the basic CW side tone level perform the procedure described at right Breas By installing silicon diodes sold separately in the po sitions indicated the advanced scan functions can be changed BFO adjustment The BFO adjustment requires an accurate frequency counter less than 1 ppm Connect the frequency counter to R266 on the main unit See p 45 or 47 for the exact location Make the adjustments shown in the diagram at right in numerical order 39 anaana Aa cA A ia asas aus ana aasan an SN NN aN i Et Ree g ha e Aa tans a 1 Romove the top and bottom covers 2 Adjust the R238 as shown in the diagam at left 3 Replace the top and bottom covers MODIFICATION Faster scan speed Slower scan speed with mic UP DN with mic UP DN C Slower scan speed 1 Remove the top and bottom covers 2 Unscrew the 6 screws and remove the front panel from the transceiver body as shown in figure 1 3 Diode leads should be bent and cut before insert ing them into the P C board 4 Solder required diodes on the back of the P C board as shown in figure 2 Make sure they are inserted in the proper direction in the desired position 5 Replace the front panel top and bottom covers MODE FREQUENCY ADJUSTMENT CW CW s AM noosa TT a
24. CW filter is required for CW Narrow receiving AM FM selects AM and FM alternately e The IC 728 requires an optional Ul 7 AM FM UNIT for AM transmitting and FM transmit ting receiving PANEL DESCRIPTION 1 MIC GAIN CONTROL MIC GAIN p 23 Adjusts microphone input gain e See p 23 for mic gain setting details Recommended level for the supplied A microphone Decreases I 9 Increases S RF METER pgs 21 23 Shows the signal strength while receiving Shows the relative output power while transmitting SQUELCH CONTROL SQUELCH p 21 Adjusts the squelch threshold level Recommended level for FM 17 SQUELCH Shallow M Deep Recommended level for SSB CW and AM FUNCTION The squelch removes the noise output from the speaker closed condition when no signal is received The squelch is particularly effective for FM Itis also availa ble for other modes SETTING PROCEDURE Squelch setting When operating in FM first rotate the control fully counterclockwise Then rotate the control clockwise to the point where the noise just disappears This is the best position The squelch does not open for weak signals when it is set too deep AF GAIN CONTROL AF GAIN pgs 21 23 Varies the audio output level from the speaker AF GAIN Decreases M Increases Min audio output Max audio output TRANSMIT ALC INDICATOR TX p 23 Lights while transmitting e While ALC i
25. INSTRUCTION MANUAL HF TRANSCEIVER 1IE 728 HF 50 MHz TRANSCEIVER IC 729 Downloaded by RadioAmateur EU Icom Inc ate ATT PREAMP AGC COMP LEVEL RF PWR VFO AH p SPLAT IMPORTANT caiste did i PRECAUTIONS uuu u asadas i EXPLICIT DEFINITIONS i UNPACKING ona i TABLE OF CONTENTS il 1 PANEL DESCRIPTION 1 8 E Pron Panel cars 1 ME Rear panel 5 MI Function display 7 H Microphone HM 12 8 2 INSTALLATION AND CONNECTIONS 9 16 E Unpacking atada 9 Mi Mounting the transceiver 9 E Antena carebat a 9 M Connections chart 10 Mi Power supply connections 11 Linear amplifier connections 12 Antenna tuner connections 13 AFSK terminal unit connections 14 Remote jack CI V information 15 3 OPERATION 17 28 BI Initial settings 17 M Basic operation 17 M Mode types VFO Memory 18 Bl Frequency Setting 19 B RECEIVING unusapa s sanhas E i 21
26. ION The backup battery should be replaced by an authorized Icom Dealer or Service Center 1 Turn power OFF 3 Release switches A A A A a aaa a ii meena A Lhe e da CIRCUITRY FUSE REPLACEMENT This fuse is installed in the PA UNIT 12 V of DC power are applied to the circuitry in the IC 728 729 through the DC line fuse and the PA unit PA unit 2 While pushing and holding MW and FUNC turn power ON e ALL indications are displayed for a couple of seconds then 14 10000 MHz USB is displayed e The CPU is now reset Downloaded by MAINTENANCE AND ADJUSTMENT 6 RadioAmateur EU E Frequency calibration approximate A very accurate frequency counter is required to calibrate the frequency of the IC 728 729 However a rough check may be performed by receiving radio station WWV or other standard frequency signals 6 Push MW to memorize the USB calibration value 7 Push SSB to select LSB The calibration can be performed in each operating mode and it is unnecessary to calibrate in each band The calibration range is 1 26 kHz in 10 Hz step 9 Push MW to memorize the LSB calibration value 8 Rotate the RIT control for a zero beat CAUTION Your IC 728 729 has been thoroughly adjusted and checked at the factory be fore being shipped You should not calibrate the frequency except for special reasons 10 Push CW N to s
27. MPLE IN THE MEMORY MODE Operating frequency 14 028 MHz CW MEMO 19 Previously used VFO VFO A HA T n To MEMORY CHANNELS 4 E Programming split memory channels for accessing a repeater Memory channels 23 and 24 are split memory chan These memory channels are especially useful for nels and can be programmed for both transmit and repeater operation receive frequencies and operating modes e Split memory channel selection Select memory channel 23 and 24 with UP or DOWN in the memory mode e SPLIT blinks then disappears if only 1 frequency has been programmed in that channel e SPLIT blinks then lights if 2 frequencies have been programmed in that channel e Split memory channel programming Following is a programming example of 29 680 MHz FM for receiving and 29 580 MHz FM for trans mitting in memory channel 23 e An optional Ul 7 is required for FM operation with the IC 728 1 Set 29 680 MHz RX freq and FM in VEO A ondaa SPLIT l SPLIT appears 6 Push MW to program the frequencies VFOA p seur 21 SPLIT L onl e Split memory channel operation When memory channel 23 or 24 is selected and the While receiving memory channel has been programmed with 2 fre quencies split frequency operation is automatically 4z selected L l 1 Transmit e Transmit frequency appears while transmitting 2 Return to receive e Receive
28. N and OFF in FM mode at the same time e To transmit a subaudible tone an optional UT 30 PROGRAMMABLE TONE ENCODER UNIT is re quired e Dial lock OFF e Tone encoder FM only OFF e Dial lock ON e Tone encoder FM only ON FUNCTION Subaudible tones are used to access a repeater which requires such tones The UT 30 offers you 38 kinds of subaudible tone frequencies to match your needs BAND SWITCH BAND p 19 urns the band change function ON and OFF Band change indicator While this indicator is displayed the main dial changes the operating band The previously used frequency on the selected band appears via the band stacking register See p 19 for details O AEA HRS MEMORY CHANNEL UP DOWN SWITCHES UP DOWN p 29 Changes the displayed memory channel number p in the VFO mode Changes the displayed memory channel in the memory mode ANTENNA TUNER SWITCH TUNER pgs 27 28 Turns the antenna tuning ON when an optional an tenna tuner is connected e Optional AH 3 and AT 160 HF automatic antenna tuners are available RIT CONTROL RIT p 25 Shifts the receive frequency while the RIT function is ON e Rotate the control clockwise to increase the receive fre quency or rotate the control counterclockwise to decrease the receive frequency 0 AG j 1 2 kHz 1 2 kHz RIT SWITCH RIT p 25 Turns the RIT function ON and OFF e Push it to turn the func
29. ND KON oe eS 14 195 00 15 18 128 00 15 gt When you do not use the band stacking register use the MHz switch instead of BAND to change the band The band stacking registers of the IC 728 and IC 729 are slightly different IC 728 IC 729 D D Qs Su SS to any position between the ms E aD ham bands D Es mM o mM Dj Da imeen naeia o tam A aana OPERATION 3 kHz TUNING STEP The operating frequency can be changed in kHz steps for quick tuning 1 Push kHz to display the kHz tuning indicator 2 Rotate the main dial to change the frequency in kHz steps 3 Push kHz again to turn OFF the indicator 4 Rotate the main dial for fine tuning if required NOTE When selecting AM or FM mode the kHz tun ing step is automatically selected by the auto tuning step function When fine tuning is required in AM or FM push kHz to turn OFF the kHz tuning step manually CHANGING THE MINIMUM TUNING STEP The IC 728 729 s minimum tuning step default setting is 10 Hz However this can be changed to 20 Hz or 50 Hz as follows 1 Push FUNC USB i rt FOA I 2 While pushing and holding kHz rotate the main ILI I dial to change the minimum frequency step Minimum tuning step 10 Hz A USB FUNC 3 Release kHz after the desired minimum frequen cr EG I cy step appears Li I Minimum tuning step 50 Hz AUTO TUNING STEP FUNCTION
30. O NOT short pin 2 to ground as this can damage the internal 8 V requiator o TRANSMIT wasan A a rs e 2 E Unpacking After unpacking immediately report any damage to the delivering carrier or dealer Keep the shipping cartons m Mounting the transceiver Select a location for the transceiver that allows ade quate air circulation free from extreme heat cold or vibrations and away from TV sets radios and other electro magnetic sources ADJUSTMENT ANGLES The stand on the bottom of the IC 728 729 provides two operating angles E Antenna Select an antenna such as a well matched 50 Q an tenna and feedline The transmission line should be a coaxial cable VSWR should be less than 1 5 1 PL 259 CONNECTOR INSTALLATION INSTALLATION AND CONNECTIONS For a list and a diagram of accessory equipment included with the IC 728 729 see UNPACKING on the inside front page p i of this manual For mobile installations an optional IC MB5 MOBILE MOUNTING BRACKET is available Select a location which can support the weight of the transceiver and that does not interfere with the operation of the vehicle WIRING THE DC POWER CABLE IN YOUR CAR Attach a rubber grommet to the DC power cable to prevent shorting o UI e CAUTION Protect your transceiver from lightn ing by using a lightning arrestor Solder Solder Slide the connector Slide the coupling ring body on and solder it down Strip th
31. PLIFIER This is an all solid state 500 W linear amplifier The power amplifier unit can be separately set up from the power supply unit AT 150 HF AUTOMATIC ANTENNA TUNER Style and size are matched with the IC 728 729 Including an automat ic antenna selector for 3 separate an tennas moreover a long wire antenna can be tuned EX 627 AUTOMATIC ANTENNA SELECTOR Automatically selects the antenna for the selected ham band Manual selection is also possible e Max input power 1000 W PEP 50 pre asprin nett Aah nein hte edad Rese NMR 11 OPTIONS IC PS15 DC POWER SUPLY Heavy duty power transformer sys tem power supply Power ON OFF is relayed to the transceiver power switch e Output voltage 13 8V DC e Max current drain 20 A IC SP3 EXTERNAL SPEAKER External speaker designed for base station operation e Input impedance 8 Q e Max input power 4 W SM 6 DESKTOP MICROPHONE Electret condenser type desktop microphone for base station operation IC PS30 DC POWER SUPPLY A lightweight switching regulator sys tem power supply equipped with 3 extra output connectors e Output voltage 13 8 V DC e Max current drain 25 A SP 7 EXTERNAL SPEAKER Designed for base station operation Style and size are matched with the IC 728 729 e Input impedance 8 Q e Max input power 5 W SM 8 DESKTOP MICROPHONE Electret condenser type desktop microphone including 2 connection c
32. Transceiver ETETE SOO 500 a Ground ACC 2 ACCIU OPC 118 sold separately To the IC 2KLPS CONNECTING THE IC 4KL Coaxial cable supplied with the IC 4KL To an HF antenna ACC cable supplied with the IC 4KL ACC Ic 4KL Hi pai Remote controller a as Oj Transceiver Remote control cable supplied with the IC 4KL Ground AC outlet CONNECTING A NON ICOM LINEAR AMPLIFIER To antenna 50 s cable 50 MHz Transceive O RF INPUTO RF OUTPUT NON ICOM ALCO LINEAR AMPLIFIER SEND O NOTE 1 The specifications tor the SEND relay are NOTE 2 The ALC output level of the linear ampli 16VDC2A lfthis level is exceeded a large exter fier must be in the range 0 V 4 V and the nal relay must be used IC 728 729 does not accept positive voltage RS O RR o d a Ea ene eae tt 12 2 INSTALLATION AND CONNECTIONS E Antenna tuner connections CONNECTING THE AT 160 Set the tuner selection switch to AT 160 TT HF antenna e Push the switch IN Control cable supplied with the AT 160 Coaxial cable ACC cable supplied with the AT 160 supplied with the AT 160 Set the tuner selection switch to AH 3 a sas e Push the switch OUT E To the AH 2b or an antenna element Transceiver CONNECTING THE AT 150 an HF antenna Coaxial cable supplied with the AT 150 ACC cable supplied with the AT 150 CONNECTING THE IC AT500 Coaxial cable supplied w
33. When selecting AM or FM the kHz tuning step indi cator is automatically selected by the auto tuning step function This function can be turned ON and OFF for your convenience 1 To turn OFF the function push FUNC then push AM FM 2 To turn ON the function again push FUNC then push AM FM again TURNING THE 10 Hz READOUT ON AND OFF The 10 Hz readout can be turned ON and OFF The frequency changes in the minimum tuning step set even if the readout is turned OFF 1 Push FUNC 2 Push BAND to turn OFF the 10 Hz readout m i VFOA 3 To turn the readout back ON repeat steps 1 and 2 IES 20 21 3 OPERATION MW Receiving RX Lights UP in green when receiving with the squelch open S RF METER Shows the receive signal strength PBT p 25 Rotate the PBT control outer to reduce interference e PBT does not function in FM SQUELCH p 2 When using squelch ro tate to close squelch RIT p 25 Push RIT to indicate ma then rotate the RIT control to shift your receive frequency e Transmit frequency is not shifted regardless of the RIT function FUNCTION DISPLAY Shows the receiving fre quency operating mode To turn OFF the RIT function push RIT again PHONES ans TUNER PHONES 6 AN GAIN SQUE CH MIC GAIN Push when Insert head using the phones when MICROPHONE ad nike c
34. ables for simultaneous connection of 2 transceivers UP DOWN switches also come with the microphone PS 55 DC POWER SUPPLY A heavy duty power transformer sys tem power supply Built in cooling fan for full duty operation The size is matched with the IC 728 729 e Output voltage 13 8V DC e Max current drain 20 A SP 20 EXTERNAL SPEAKER Designed for base station operation Equipped with 4 types of audio filters a headphone jack and can be con nected to 2 transceivers e Input impedance 8 Q e Max input power 5 W SM 20 DESKTOP MICROPHONE Unidirectional electret microphone for base station operation Includes UP DOWN switches and a low audio cut function ET AN s AAN CSS A A Sr Se E SVS SSSR CT 16 SATELLITE INTERFACE UNIT WL apt age ee Ci v REMOTE 4 15V DC iN Ealicom SATELLITE INTERFACE UIT 5 TRACKING UP titer HIGH BAND NORMA LOW BAND REVERSE ADDRESS SWITCHS HIGH BAND LOW BAND Easy tuning for instant satellite com munications FL 100 FL 101 CW NARROW FILTERS Have good shape factors and pro vide you with better CW reception during crowded band conditions Passband width e FL 100 500 Hz 6 dB eFL 101 250 Hz 6 dB IC MB5 MOBILE MOUNTING BRACKET Transceiver bracket for mobile operation CT 17 CI V LEVEL CONVERTER ANCOM CT 17 COMMUNICATION INTERFACE V Cit VJ LEVEL CONVERTER CI V REMOTE POWER 0 2 3 For remote
35. ange the operating frequency even a little bit PTT Ulu aY sss Downloaded by OPERATION 3 RadioAmateur EU AT 160 HF AUTOMATIC ANTENNA TUNER The AT 160 matches the IC 728 729 to the antenna automatically The AT 160 has memories for auto preset No preset operation is necessary When you change the operating band the AT 160 au tomatically presets for the band Then when you start transmitting the AT 160 tunes the antenna exactly No re tuning is necessary The AT 160 power is supplied from the transceiver and power ON OFF is relayed to the transceiver power switch CAUTIONS BE SURE to push the tuner selection switch IN on the transceiver rear panel before tuning with the AT 160 If the switch has been pushed OUT the transceiver and the AT 160 may be damaged e When the switch is pushed IN AT 160 appears for 1 sec on the function display as follows USB Cl Cf VFOA ri L _ L I FILI NEVER operate the AT 160 without an antenna The tuner and transceiver will be damaged The AT 160 cannot be used for 50 MHz DO NOT connect the AT 160 to the 50 MHz antenna connec tor of the IC 729 IC AT500 HF 500 W AUTOMATIC ANTENNA TUNER AT 150 HF AUTOMATIC ANTENNA TUNER AT 160 operation No re tuning is necessary when you change the operating frequency 1 Turn the transceiver power ON e The AT 160 power is turned ON and THRU appears USB Lt IAE rr VOA L I I Par LIL 2
36. cted MEMORY CHANNEL NUMBER READOUT Shows the selected memory channel number MEMORY INDICATOR Shows that the memory mode is selected FUNCTION INDICATOR n Shows that the FUNC switch has been pushed e Secondary functions can be used with some switches RIT INDICATOR Shows that the RIT function is ON MODE INDICATORS Show the operating mode SCAN INDICATOR Shows that one of the scan functions is being operated a O T Pe A E aa PANEL DESCRIPTION 1 I Downloaded by a Microphone HM 12 RadioAmateur EU o eo UP DOWN SWITCHES UP DN UP DOWN ON OFF SWITCH UP DN Change the operating frequency or memory channel Turns the UP and DN switches ON and OFF e Continuous pushing changes the frequency or memory channel number continuously PTT SWITCH The up down on off switch must be set to ON to use Push and hold to transmit release to receive these switches See TECHNICAL INFORMATION MICROPHONE CONNECTOR O AF output Front panel veiw Microphone input GND microphone ground 2 8 V DC output 6 GND PTT ground 3 Frequency up down 5 PTT 3 4 Squelch switch FUNCTION DESCRIPTION 8 V DC output Max 10 mA Frequency up Ground Frequency down Ground through 470 Q 4 Squelch open LOW level Squelch closed HIGH level e HM 12 SCHEMATIC DIAGRAM MICROPHONE MICROPHONE CABLE MICROPHONE PLUG CAUTION D
37. dance More than 10 kQ Connected in parallel with ACC 2 pin 5 N gt O ACC 2 SOCKET Output voltage 8 V 0 3 V Regulated 8 V output Output current Less than 10 mA GND Same as ACC 1 pin 2 SEND Same as ACC 1 pin 3 lt aun wasmman maan aasan o t 1 PANEL DESCRIPTION NW Function display SCAN LSBUSBCW NAMFM Gill FUNC MEM TUNE 11 4 p 1 I 1 31 SP TUNING STEP BAND CHANGE INDICATORS Show the selected tuning step or show that the band change function is ON kHz tuning indicator TUNING INDICATOR Shows that an optional antenna tuner is connected e TUNE lights when the connected antenna tuner optional has completed tuning when the tuning operation has not been performed after power ON e TUNE blinks when the antenna is being tuned THROUGH INDICATOR Shows that the connected antenna tuner optional is bypassed e THRU lights when the connected antenna does not match the antenna tuner matching range when the antenna tuner is manually bypassed O KW L FREQUENCY READOUT Shows the operating frequency VFO INDICATORS Show that the VFO mode is selected e Selected VFO is indicated SPLIT INDICATOR Shows that the split frequency operation is being per formed e This indicator blinks for 2 sec when a split memory chan nel memory channel 23 or 24 is sele
38. driver amplifier Adjust R19 to set 300 mA for the final amplifier 9 Turn transceiver power OFF 10 Re solder the de solder points 11 Reassemble the transceiver C28 EP21 Fig 3 shen Nl ty bth a tenance geen IA Tar Daa baa Tr YON A Tso O aiana A A pa pasaika sasina E batten ma ARN Ame atten AEN Ab A wana 40 41 OPTIONS INSTALLATION E Ul 7 AM FM unit For the ic 728 This unit provides AM transmitting and FM transmit ting receiving capabilities for the IC 728 1 Remove the bottom cover 2 Properly insert the 10 pin plug on the Ul 7 to J20 on the main unit 3 Connect the two 3 pin plugs from the Ul 7 to J21 and J22 on the main unit respectively 4 Connect the supplied brown wire between J5 on the front unit and J3 on the UI 7 5 Form a wire harness using the supplied wire tie 6 Replace the cover The UT 30 has 38 programmable tones available 1 Remove the bottom cover Jumper cable Ul 7 The IC 729 already 2 Remove the Ul 7 from the main unit supplied with the 1C 729 includes this unit or the Ul 7 me 3 Remove the protective paper from the back of the UT 30 to expose the adhesive strip 4 Attach the UT 30 in the location marked on the main unit 5 Connect all wires and cables as shown in the figure at left 6 Install the Ul 7 on the main unit again See the above box for the unit installation 7 Replace the cover
39. e O au he annassa 3 OPERATION m Transmitting SETTING PROCEDURE Mic gain setting While transmitting in SSB mode rotate MIC GAIN to adjust the mic gain so that the ALC indicator TX sometimes in tensifies with your normal voice level S RF METER Shows the relative output power TX FUNCTION DISPLAY Lights UP in red when Shows the transmitting transmitting frequency operating mode etc TRANSMIT ES AF GAIN SQUELCH MIC 3AIN 5358 PHONES TUNER Push IN when using the con transmit and nected an push OUT to o D 2 e tenna tuner receive AA AY a A eee eee oe optional TRANSMIT Push IN to AF GAIN p 39 While transmitting in CW mode set the desired side tone level LOCK FM TONE Push IN when activating the dial lock function When operating in FM a subaudible tone is su perimposed over your voice for repeater access COMP LEVEL p 2 When using the speech compressor to increase the level of average talk power push IN Then adjust the compression level the desited R Required operations Convenient functions a a nT s s s q m n t er ceaearenanameal SSB TRANSMITTING 1 Set for SSB receiving 2 Set the frequency in your allowed frequency range for SSB transmitting 3 Set the desired RF output power with RF
40. e PLL unit and covers After changing the crystal unit frequency adjustment is necessary with C134 on the PLL unit e Ask your Icom Dealer or Icom Service Center for details The CR 64 is an oven heat type crystal unit and the specified frequency stabiity described above is guaranteed 1 min after power ON MM 8 TROUBLESHOOTING E Troubleshooting The following chart is designed to help you correct problems which are not equipment malfunctions If you are not able to locate the cause of a problem or solve it through the use of this chart contact your Power does not come on when the POWER switch is pushed IN POWER SUPPLY No sound comes from the speaker Sensitivity is low RECEIVE 2 ARS RAN ee a Receive audio is dis torted x Receive signal is distort ed with strong signals nearest Icom Dealer or Service Center DC power cable is improperly con nected e Fuse is blown e Battery is exhausted if you are using a 12 V battery as a power source e Volume level is too low e The squelch is closed e The transceiver is in the transmitting condition e An external speaker or headphones are connected e CW Narrow mode is selected without an optional CW filter e FM mode is selected without an option al Ul 7 AM FM UNIT in the IC 728 e The antenna is not connected properly e The antenna feedline is cut or shorted e The antenna for another band
41. e cable jacket and soft solder 10mm Soft I Solder Screw the coupling ring onto the connector body Strip the cable as shown at left Soft solder the center con ductor 10 mm 3 8 in For best results connect a heavy gauge wire or strap to a long earth sunk copper rod Make the distance between the GROUND terminal and ground as short as possible GROUNDING To prevent electrical shock TVI BCI and other problems ground the transceiver through the GROUND terminal on the rear panel ath ne ARON NLA A A atin hint ele Lda ha ebm INSTALLATION AND CONNECTIONS 2 E Connections chart HF ANTENNA Dipole antenna Cl V REMOTE CONTROL Transceive function connec Computer control connection tion with another Icom HF through an optional CT 17 transceiver or receiver CI V LEVEL CONVERTER Yagi beam antenna See pgs 15 16 50 MHz ANTENNA For the IC 729 PS 55 DC POWER SUPLY or IC PS30 DC POWER SUPPLY GROUND The transceiver MUST be grounded through this terminal The IC 728 does not have this connector The left figure shows the rear panel of the EXTERNAL EQUIPMENT See p 6 NON IGOM LINEAR AMPLIFIER See p 12 EXTERNAL SPEAKER AH 3 AUTOMATIC ANTENNA TUNER or AT 160 AUTOMATIC ANTENNA TUNER See p 13 AH 2b ANTENNA ELEMENT sold separately KEY JACK Straight key
42. ee pgs 45 46 for plug connection information e See pgs 47 48 for plug connection information 36 ua 37 6 MAINTENANCE AND ADJUSTMENT E Fuse replacement If a fuse blows or the transceiver stops functioning try to find the source of the problem then replace the damaged fuse with a new rated fuse CAUTION DISCONNECT the DC power cable from the transceiver when changing the fuse The IC 728 729 has 2 types of fuses installed for tran sceiver protection DC power Cable fuses 20A Circuitry fuse F G M B 125 V 4 A DC POWER CABLE FUSES REPLACEMENT y m E TI E 20 A fuse E Resetting the CPU The function display may occasionally display errone ous information e g when first applying power This may be caused externally by static electricity or other factors If this problem occurs turn the power OFF Wait a few seconds then turn power ON again If this problem continues follow this procedure CAUTION CPU resetting CLEARS all contents in memory channels and returns programmed values to default settings NW CPU backup battery The IC 728 729 has a lithium backup battery for re taining memory information The usual life of the backup battery is approximately 5 years When the battery is exhausted the tran sceiver transmits and receives normally but cannot retain memory information CAUT
43. elect CW 11 Rotate the RIT control for a zero beat 1 Set the displayed frequency to 10 00000 MHz USB 12 Push MW to memorize the CW calibration value or 15 00000 MHz USB to receive a standard fre quency station 13 Push RIT to exit the calibration mode e Other standard frequencies can also be used Calibration for AM or FM can also be performed 2 Turn the transceiver power OFF but an accurate frequency counter is necessary 3 While pushing and holding FUNC and RIT turn The calibration value is effective after exit from power ON the calibration mode 4 Release FUNC and RIT To clear the calibration value push FUNC then e RIT blinks and calibration mode is selected push MW in the calibration mode tt 5 Rotate the RIT control for a zero beat WE Main dial brake adjustment The tension of the main dial may be adjusted to suit your preference The brake adjustment screw is located on the right side of the main dial See the figure at right Turn the brake adjustment screw clockwise or coun terclockwise to a comfortable tension level while turn ing the main dial continuously and evenly in one direction E Cleaning If the transceiver becomes dusty or dirty wipe it clean AVOID the use of strong chemical agents such as with a dry soft cloth thinner benzine or alcohol to clean the cabinet as they may damage the transceiver s surfaces 6 MAINTENAN
44. frequency appears while receiving While transmitting To turn the split frequency operation OFF push SPLIT For accessing a repeater which needs a subaudible e SPLIT disappears tone push LOCK IN to turn the tone encoder ON e Simplex operation is selected with the receive frequency e An optional UT 30 is necessary to generate a tone programmed in the selected split memory channel 32 i i d lo SCANS E Scan types The IC 728 729 has 3 types of scan functions which provide tremendous scanning versatility at the touch of a few switches Select the scan which matches your operating needs MEMORY SCAN Repeatedly scans all memory channels This scan operates in the memory mode E Pre operation Program the memory channels before operating a scan as follows Dian scan edge frequencies into memory channels 25 and 26 PROGRAMMED SCAN Program desired scan frequencies MEMORY SCAN into memory channels Program desired scan frequencies and operating mode into 2 or more memory channels SELECTED MODE MEMORY SCAN For the IC 729 program frequencies in the same range 0 03 33 MHz HF or 46 2 61 1 MHz 50 MHz into memory channels 25 and 26 Programmed scan does not start if 2 scan edge frequencies have been programmed beyond the range PROGRAMMED SCAN Repeatedly scans between two scan edge frequen cies memory channels 25 and 26 Scan Scan edge A
45. ith the IC AT500 ACC cable supplied with the C 2KL Coaxial cable supplied with the IC 2KL r ACC cable Hhh supplied with the Dic aT5s00 E To an HF antenna ARAI US ACC 2 ACC 1 f a u OPC 118 Ground Le sold separately 13 etn Bor Si SA w T u att sit AAA A INSTALLATION AND CONNECTIONS 2 MW AFSK terminal unit connections When operating an AFSK such as RTTY AMTOR or See pgs 6 and 8 for ACC 1 socket information and packet connect external equipment to the ACC 1 microphone connector information socket on the rear panel or to the microphone con nector on the front panel as in the diagram below USING THE ACC 1 SOCKET Rear panel view O AFSK output AF input SQUELCH input PTT Ground GND _ AFSK TERMINAL UNIT OD O a O USING THE MICROPHONE CONNECTOR Front panel view 0000 OS ua a n m A ma anakana o MGs aqsu a eae et mirae ta a ictal sanan amaaa At A AEA a a an a aaa k 2 INSTALLATION AND CONNECTIONS E Remote jack Cl V information The IC 728 729 can be connected through an optional CT 17 Cl V LEVEL CONVERTER to a personal com puter equipped with an RS 232C port Icom Commu nication Interface V CI V controls frequency operating mode memory channels etc AC outlet 9 15V DC i s ORL Personal computer CI V bus line ye e mm 729 Up to f
46. main dial while holding kHz p 20 Turns the 10 Hz digit indication ON and OFF p 20 Turns the auto tuning step func tion ON and OFF for AM and FM p 20 dary functions can be activated e To turn OFF FUNC push the switch again MEMORY READ SWITCH MEMO p 18 Selects the memory mode and VFO mode alter nately SPLIT SWITCH SPLIT p 26 Turns the split frequency operation ON and OFF e Push the switch to turn the function ON and push it again to turn the function OFF e SPLIT is indicated when the function is ON VFO EQUALIZATION SWITCH A B p 26 Equalizes the frequency and mode of the two VFOs e The rear undisplayed VFO frequency and mode are equalized to the front displayed VFO frequency and mode VFO SWITCH VFO p 18 Selects VFO A and VFO B alternately e When the memory mode has been selected the previ ously used VFO is selected by pushing this switch q 1 PANEL DESCRIPTION WE Rear panel The figure below shows the rear panel of the IC 729 GROUND TERMINAL p 9 Connect this terminal to a ground to prevent electri cal shocks TVI BCI and other problems EXTERNAL SPEAKER JACK EXT SP p 10 Accepts a 4 16 speaker CW BREAK IN SWITCH BK IN p 24 Turns the CW break in operation ON and OFF JE cF FUNCTION The CW break in function starts transmission without pushing the transmit switch
47. n NOTE When the dial lock function has been acti vated LOCK has been pushed IN selected mode memory channel selection can be used See the box below SELECTED MODE MEMORY CHANNEL SELECTION Only memory channels programmed with the same operating mode can be selected for quick memory channel selection 1 Push MEMO to select the memory mode 2 Select the desired operating mode 3 Push LOCK IN 4 Push UP or DOWN to select the desired memory channel e When no memory channel has been programmed with the selected operating mode the operating mode returns to the previous one automatically 5 Push LOCK OUT to turn this function OFF Normal memory channels MEMO 1 MEMO 22 Split memory channels MEMO 23 MEMO 24 Scan edge memory channels MEMO 25 MEMO 26 One frequency and one mode in each memory channel Independent transmit and receive frequencies and operating modes in each memory channel for split operation p 32 One frequency and one mode in each memory channel as scan edges for programmed scan p 33 EXAMPLE Selecting memory channel 17 Select the memory mode ws Select a memory channel Push LOCK IN Push LOCK OUT 2 Select operating mode MEMORY CHANNELS 4 E Memory channel programming Memory channel programming can be performed either in the VFO mode or in the memory mode e Programming in the VFO mode EXAMPLE Pr
48. nal 24 25 3 OPERATION E RIT and Af e RIT function FUNCTION The RIT function shifts the receive frequency up to 1 2 kHz in 10 Hz steps without moving the transmit frequency This is useful for fine tuning stations which transmit us ing an off frequency or for compensating for frequency drift 1 Push the RIT switch Cul appears 2 Rotate the RIT control RIT PBT 0 1 2 kHz 1 2 kHz 3 To cancel the RIT function push RIT again Eu disappears 7 E PBT operation The PBT function electronically narrows the F pass band width to reduce interference The PBT control should usually be left in the center po sition when there is no interference PBT OPERATION EXAMPLE Cutting a lower Center passband RIT PBT RIT PBT i Passband IF center frequency Interference Desired signal e Af function FUNCTION The A f function adds the RIT shift frequency to the displayed frequency This is useful for transmitting on the real receiving frequen cy shifted by the RIT 1 Set the RIT shift e Proceed with steps 1 and 2 described at left RIT PBT 2 Push FUNC then push RIT CTU LAT FOA OLLI oe 1 Rit shift frequency is added This function is available only when Emi is indicated NOTE When PBT is used the audio tone may be changed Cutting a higher passband RIT
49. ner selection switch OUT on the transceiver rear panel before tuning with the AH 3 If the switch has been pushed IN the transceiver or the AH 3 may be damaged e When the switch is pushed OUT AH 3 appears for 1 sec on the function display as follows USB at x VFOA I y in Y I NEVER operate the AH 3 without an antenna wire The tuner and transceiver will be damaged NEVER operate the AH 3 when it is ungrounded The AH 3 cannet be used for 50 MHz DO NOT con nect the AH 3 to the 50 MHz antenna connector of the IC 729 Transmitting before tuning or transmitting while the THRU indicator lights may damage the transmit ter circuit AH 3 operation Re tuning is necessary when you change the oper f ating frequency 1 Turn the transceiver power ON e TUNE appears 2 Set the desired frequency in a ham band e The AH 3 will not operate on frequencies out of ham bands 3 Push TUNER e TUNE blinks and CW apears while tuning TUNE lights constantly when the tuning is complete THRU appears when the AH 3 cannot tune the connected antenna wire e When THRU appears the AH 3 is bypassed and the antenna wire is connected to the antenna connector on the transceiver directly To bypass the AH 3 manually push FUNC then push TUNER e THRU appears Tuning is necessary for each frequency Be sure to re tune the antenna before transmitting when you ch
50. nsferring The frequency and operating mode in the memory mode can be transferred to the VFO mode e Transferring in the VFO mode This way is useful for transferring the programmed contents to VFO 1 Select VFO A or VFO B with VFO 2 Select a memory channel with UP or DOWN eTo confirm the memory channel contents push MEMO then push MEMO again to return to the VFO mode 3 Push FUNC then push MW to transfer the fre quency and operating mode e Transferred frequency and operating mode appears on the display e Transferring in the memory mode This is useful for transferring frequency and operat ing mode while operating in the memory mode NOTE When you have changed the frequency or operating mode in the selected memory channel Displayed frequency and mode are transferred Programmed frequency and mode are not trans ferred but they remain in the memory channel 1 Select a memory channel with UP or DOWN e And set the frequency or operating mode if required 2 Push FUNC then push MW to transfer the fre quency and operating mode e The memory contents are transferred to the VFO previ ously used 3 To return to the VFO mode push VFO The frequency tranferring can be performed in either the VFO mode or in the memory mode TRANSFERRING EXAMPLE IN THE VFO MODE Operating frequency 21 320 MHz USB VFO A Contents of MEMO 18 14 020 MHz CW TRANSFERRING EXA
51. ogramming 7 088 MHz LSB into memory channel 12 1 Set the desired frequency and operating mode in the VFO mode 2 Push UP or DOWN several times to select the desired memory channel to be programmed eTo confirm the memory channel contents push MEMO then push MEMO again to return to the VFO mode 3 Push MW to program the displayed frequency and operating mode into the memory channel To check the programmed contents push MEMO to select the memory mode e Programming in the memory mode EXAMPLE Programming 21 280 MHz USB into memory channel 18 1 Select the desired memory channel to be programmed with UP or DOWN in the memory mode 2 Set the desired frequency and operating mode in the memory mode I 3 Push MW to program the displayed frequency and operating mode into the memory channel PRACTICAL EXAMPLE When you find a station on 21 015 MHz CW in the VFO 2 Push MW to store 21 015 MHz CW into memory chan mode and you want to keep watching for other stations nel 11 e You have decided to use memory channels 11 15 for storing frequencies temporarily 3 Rotate the main dial to continue watching 1 Push UP or DOWN several times to select memory 4 Push MEMO to quickly select the stored frequency channel 11 in the VFO mode 5 To return to the VFO mode push MEMO again 30 A sete A A n Ao ene must 4 MEMORY CHANNELS W Frequency tra
52. onnected required 39 antenna tuner We AH 3 or DOWN MEMO UP 0 e A PA ES AH 160 LOCK Push IN when activating the dial lock function NB p 1 When using the noise blanker function for reduc ing pulse type noise push ATT p 1 When using the attenua tor for reducing distortion against strong signals push IN PREAMP p 1 Required operations When using the preamp for receiving weak sig nals push IN AGC p 1 When AGC fast is neces sary push IN E Convenient functions Y SSB RECEIVING 1 Turn power ON with POWER 2 Select VFO A or VFO B with VFO 3 Select USB or LSB with SSB 4 Set the desired frequency with the main dial 5 Adjust the audio output level with AF GAIN CW RECEIVING 1 Turn power ON with POWER 2 Select VFO A or VFO B with VFO 3 Select CW with CW N 4 Set the desired frequency with the main dial 5 Adjust the audio output level with AF GAIN AM RECEIVING 1 Turn power ON with POWER 2 Select VFO A or VFO B with VFO 3 Select AM with AM FM 4 Set the desired frequency with the main dial 5 Adjust the audio output level with AF GAIN FM RECEIVING The IC 728 requires the UI 7 AM FM unit 1 Turn power ON with POWER 2 Select VFO A or VFO B with VFO 3 Select FM with AM FM 4 Set the desired frequency with the main dial 5 Adjust the audio output level with AF GAIN
53. or B Ne Scan edge B or A Jump This scan operates in the VFO mode SELECTED MODE MEMORY SCAN Repeatedly scans all memory channels with the same selected operating mode This scan operates in the memory mode Before starting a scan open or close the squelch as desired The scan continues until it is stopped and does not pause even if it detects signals SQUELCH OPEN The scan pauses for a set time when it detects signals then resumes The set time is 10 sec for nor mal signals and 3 sec for sin gle tones SQUELCH CLOSED See p 39 for advanced scan functions e er _ i YE nn OO I EE gt 2 D2 s E P m SCANS 5 E Programmed scan operation Programmed scan can be started in either the VFO mode or the memory mode 1 Select the desired operating mode Stop Start eThe operating mode can also be changed while scanning 2 Set SQUELCH open or closed e See page at left for scan condition 3 Push FUNC then push VFO to start the scan e The VFO mode is automatically selected 2 Set squelch Select operating mode 4 When the scan detects a signal the scan pauses or ignores it depending on the squelch condition b 5 To cancel the scan rotate the main dial or push VFO A B MEMO or MW E Memory scan operation Memory scan can be started in either the VFO mode Stop Start or the memory mode 1
54. or external electronic keyer connection eertse e See ee Seb ug ee 2 INSTALLATION AND CONNECTIONS WE Power supply connections Use an optional PS 55 or IC PS30 DC POWER SUP PLY when operating the IC 728 729 with AC power Refer to the diagram below CAUTION Before connecting the DC power ca ble check the following important items Make sure e The POWER switch is OFF e Output voltage of the power source is 12 15 V when you want to use a non lcom power supply e DC power cable polarity is correct Red positive G terminal Black negative terminal CONNECTING AN ICOM DC POWER SUPPLY Transceiver DC power socket M AC outlet p p When the PS 55 is connected the AC cable PS 55 power is synchronized with the POWER switch of the 1C 728 729 DC power cable CONNECTING A NON ICOM DC POWER SUPPLY Transceiver DC power socket DC power supply 13 8 V 20 A Black Red E To AC outlet Supplied DC power cable CONNECTING A VEHICLE BATTERY NEVER connect to NOTE Use terminals for a 24 V battery the cable connections black 12 V battery Supplied DC power cable AWT RONEN Af ob unan uama e t INSTALLATION AND CONNECTIONS 2 E Linear amplifier connections CONNECTING THE IC 2KL ACC cable supplied with the IC 2KL To an HF antenna Glan EAN Coaxial cable 2 supplied with the i EY IC 2KL HF ES
55. our Icom Cl V transceivers or receivers can be connected to a personal computer equipped with an RS 232C port To control the transceiver see the CT 17 instruction manual for details IC 728 e Setting the Cl V condition with the diode matrix Transmitters and receivers using the Icom Cl V system Insert the required diodes 155133 15853 etc or cut exchange serial information in the packet format the unnecessary diodes to change the diode matrix The contents of a data packet can be changed by the See the figure on the right page for the location of diode matrix diodes BAUD RATE Baud rate is the data transfer rate The standard ee y baud rate for the Icom Cl V is 1200 bps q se iS FREQUENCY DATA D lODE D When connecting the transceiver with the IC 735 for No diode Cut D4 a transceive function change the value to 4 bytes Default oh ADDRESS You can designate an address for your IC 728 or IC 729 D60 D61 8 16 The IC 728 has the address of 38H 56 and the IC 729 fase Vinsoni peon e has the address of 3AH 58 as default values preset diode diode diode at the factory Figures marked with an H are hexadecimals and bracketed figures are decimals Default A da A A a qg A TEIN NWT WOU CONIC s TRANSCEIVE Transceive operation is possible with the IC 728 729 and another Icom transceiver or receiver Transceive operation means the IC 728 729 is
56. s activated the LED brightness increases FUNCTION The ALC circuit automatically limits RF output power by controlling the input level of the RF power amplifier This prevents transmitting distorted signals when the input sig nal level exceeds the allowable level RECEIVE INDICATOR RX p 21 _Lights during receiving when the squelch is open a N I u a s 1 PANEL DESCRIPTION See pgs 1 2 3 ICOM PHONES MICROPHONE Oo a Or LEVEL MAIN DIAL p 19 Changes the displayed frequency e When the band change indicator is displayed the main dial changes the band BRAKE ADJUSTMENT SCREW p 38 Adjusts the main dial tension Light 8 Heavy kHz TUNING STEP SWITCH kHz p 20 Turns the 1 kHz tuning step ON and OFF kHz tuning indicator USB e While this indicator is displayed the main dial changes the displayed frequency in 1 kHz steps MHz TUNING STEP SWITCH MHz p 19 Turns the 1 MHz tuning step ON and OFF MHz tuning indicator lea e While this indicator is displayed the main dial changes the displayed frequency in 1 MHz steps AF GAIN SQUELCH MIC GAIN TUES et A Si MCR tee ans tal See p 7 IL ME Debio Tre TES DIAL LOCK SWITCH LOCK pgs 21 23 Turns the dial lock function ON and OFF e The dial lock function electronically locks the main dial Also turns the subaudible tone encoder O
57. s sss a A e a MAINTENANCE AND ADJUSTMENT 6 E RIT adjustment When the RIT control center position RIT 0 is shifted it can be adjusted by the internal variable resistance 2 Set the RIT control to the center position and turn OFF the RIT function if it is turned ON 1 Remove the top cover and turn power ON 3 Receive a standard frequency station such as WWV 4 Push the RIT switch to turn the RIT function ON Adjust R70 on the PLL unit as shown in the figure at left to the same tone pitch as that received 5 Turn the RIT function OFF and ON with the RIT switch to compare the two tone pitches and adjust R70 until both tone pitches are the same 6 Replace the top cover The PA unit operates with a linear amplifier and re 1 Preparation quires some idling current to flow through the driver POWER OFF and final transistors to obtain bias voltage MIC GAIN Max counterclockwise RF PWR Max counterclockwise PA UNIT Microphone Disconnect Ammeter 500 mA range 2 Remove the covers and open the PA unit follow ing the disassembly procedures on pgs 35 36 3 Unsolder points indicated by 1 and 2 4 Properly connect test leads to these points See figure 2 for the driver amplifier and figure 3 for the final amplifier adjustments 5 Turn transceiver power ON 6 Push SSB to select LSB or USB 7 Push TRANSMIT IN to transmit 8 Adjust R8 to set 100 mA for the
58. the function ON e An incorrect transmit frequency is set Set the proper frequencies into VFO A and B or into memory channel 23 or 24 e Subaudible tone encoder has been Push LOCK IN turned OFF to access a repeater which An optional UT 30 is necessary to gener requires a tone for access ate the subaudible tone e MIC GAIN is rotated too far clockwise Set MIC GAIN to a suitable position e LEVEL is rotated too far clockwise Set LEVEL to a suitable position with the speech compressor ON e The dial lock function is activated e Push LOCK OUT e The internal CPU has malfunctioned e Perform CPU resetting While pushing and holding FUNC and MW turn power ON e Split function is activated e Push SPLIT to turn the function OFF p 2 e Squelch is open Set SQUELCH to the threshold point e The same frequencies have been Program different frequencies into programmed in memory channels 25 memory channels 25 and 26 and 26 eScan edge frequencies have been Program frequencies in the same programmed beyond the receive fre range 0 03 33 MHz or 46 2 61 1 quency range of the IC 729 MHz into memory channels 25 and 26 in the IC 729 e 2 or more memory channels contain Program 2 or more memory channels ing the selected mode have not been with the same operating mode for the programmed scan 44 INSIDE VIEWS sss 9 MW IC 728 main uni LOk 40 001 714 3U
59. tion ON and push it again to turn the function OFF e Gli is indicated when the function is ON e Use the RIT control to vary the RIT frequency PASSBAND TUNING CONTROL PBT p 25 Adjusts the passband selectivity of the IF filter for through frequencies e Set to the center position when not in use FUNCTION The PBT function makes the IF passband width narrow to reject interference The PBT is specially effective in SSB operation and not available in FM operation Simplified example of the PBT function Cutting a lower Center passband Cutting a higher passband PANEL DESCRIPTION 1 MEMORY WRITE SWITCH MW Stores the displayed frequency and mode into the displayed memory channel FUNCTION SWITCH FUNC Activates the secondary functions of some switches While FUNC is indicated in the function display secon By SWITCH aoe FUNC MEMO FUNC VFO FUNC MW FUNC RIT FUNC TUNER FUNC kHz FUNC BAND FUNC AM FM Starts programmed scan p 34 Starts memory scan p 34 Starts selected mode memory scan when LOCK has been pushed IN in advance p 34 Transfers the memory contents to the selected VFO p 31 Adds the RIT frequency to the displayed frequency p 25 Bypasses the connected anten na tuner pgs 27 28 Changes the tuning step with the
60. u want to install an optional unit adjust CAUTION DISCONNECT the DC power cable the internal units or to replace an internal fuse etc from the transceiver before performing any work on the transceiver A REMOVING COVERS PREPARING FOR THE PA UNIT REMOVAL 1 To remove top and bottom covers unscrew the 16 Unscrew the 4 screws as shown in the figure below screws as shown in the figure below PREPARING FOR THE PA UNIT REMOVAL 2 FOR THE IC 728 FOR THE IC 729 Unplug the 2 coaxial cables from J11 and J12 then Unplug the 3 coaxial cables from J11 J12 and J31 unplug the 3 pin connector from J13 as shown in the then unplug the 3 pin connector from J13 as shown figure below in the figure below ee a J31 Red ee nn nn II I O T MAINTENANCE AND ADJUSTMENT 6 REMOVING THE PA UNIT 1 Disconnect the 7 pin connector from J7 on the PLL unit as shown in the figure below OPENING THE PA UNIT 1 Remove the PA unit as shown in the box at left 2 Unscrew the 19 screws to remove the PA unit shield cover as shown in the figure below from the holder 2 Slide the tuner control socket up and remove it REMOVING THE PLL UNIT FOR THE IC 728 FOR THE IC 729 To remove the PLL unit unplug the 2 coaxial cables To remove the PLL unit unplug the 2 coaxial cables from J4 and J5 on the main unit as shown in the figure from J4 and J5 on the main unit as shown in the figure below below e S
61. unctions 39 BPO adjustment 39 AIT adjustment viscosa lan 40 B HF bands PA idling current 40 7 OPTIONS INSTALLATION 41 42 E UI 7 AM FM unit 41 E UT 30 programmable tone encoder unit 41 E MB 23 carrying handle 41 E FL 100 or FL 101 CW narrow filter 42 CR 64 high stability crystal unit 42 8 TROUBLESHOOTING 43 44 9 INSIDE VIEWS 45 48 E IC 728 main unit 45 B IC 728 PLL unit asar taa dos 46 IB C 729 main unit tala 47 E IC 729 PLL unit usarla 48 10 SPECIFICATIONS 49 14 OPTIONS tasa 50 52 SCHEMATIC DIAGRAM SEPARATE Technical information AGG sockets ad pees 6 e Microphone connector A aN ana A aa R a a aa a Ct CN IIE LAA LA and HM 12 schematic diagram 8 a au L a m tnt ite I PANEL DESCRIPTION E Front panel See p 7 R TRANSMIT rr s Gn PHONES AF GAIN e ON NN TV Ga ae u q ig POWER SWITCH POWER pgs 21 23 Turns power ON and OFF CT Power OFF TRANSMIT SWITCH TRANSMIT p 23 Selects transmitting or receiving Cl Receiving
62. used as a transmitter and another connected transceiver or receiver is used as a receiver or vice versa DIODE LOCATION Diodes are located on the PLL UNIT as shown in the figure below See pgs 35 36 for transceiver disassembly infor mation Diode location INSTALLATION AND CONNECTIONS 2 N ae E No dodo Cut DSA EE Default MAGNIFICATION OF THE DIODE LOCATION J4 D62 O eCe abe 04 J4 ESA D62 O O02 O OD57 ae 60058 D4 O OD59 E00D60 G0061 O 0063 e Setting the Cl V condition with the front panel switches With the front panel switches of the IC 728 729 you can change the transceive function and frequency FREQUENCY DATA e Setting the frequency data to 4 bytes 1 Turn the transceiver power OFF 2 Push LOCK IN then while pushing FUNC kHz and MHz turn power ON e Setting the frequency data to 5 bytes 1 Turn the transceiver power OFF 2 Push LOCK OUT then while pushing FUNC kHz and MHz turn power ON e Returning to the diode matrix setting 1 Turn the transceiver power OFF 2 Push LOCK OUT then while pushing FUNC MHz and BAND turn power ON data in the same way as functions are changed via the diode matrix TRANSCEIVE e Setting transceive ON 1 Turn the transceiver power OFF 2 Push LOCK IN then while pushing FUNC kHz and BAND turn power ON e Setting transceive OFF 1 Turn the transceiver power OFF 2 P
63. ush LOCK OUT then while pushing FUNC kHz and BAND turn power ON e Returning to the diode matrix setting 1 Turn the transceiver power OFF 2 Push LOCK OUT then while pushing FUNC MHz and BAND turn power ON ee i 17 E jN 3 OPERATION E Initial settings Before performing the initial settings make sure all con Before power ON set controls and switches as shown nections required for your system are complete by in the figure below referring to section 2 CW Max clockwise CCW Max counterclockwise MIC GAIN CENTER SQUELCH CCW PBT CENTER TRANSMIT OUT e E Z m k Efe IAL Cm fol r 259 z RIT CENTER LOCK OUT LEVEL CENTER RF PWR CW COMP OUT 4 E Basic operation 1 After the initial settings are complete push 4 Rotate the main dial to set the desired frequency POWER IN to turn power ON e See p 19 for frequency setting details a E 2 Rotate AF GAIN clockwise to adjust the desired 5 After checking that SPLIT or RIT are not indi audio output level cated push the PTT switch on the microphone to transmit Then release the PTT switch to return to receive eFor CW or RTTY operation see pgs 22 24 3 Select the desired operating mode by SSB CWIN or AM FM To eliminate noise rotate SQUELCH clockwise until the noise disappears

Icom IC-728 IC-729 user manual

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