Kenwood TM-741A- Manuals

Page 2 - Save this instruction manual.

Thank you for purchasing this new transceiver. IMPORTANT: Please read this instruction manual carefully before placing your transceiver in service. Save this instruction manual. CAUTION; Long transmission or extended operation in the HI power mode might cause the rear of this transceiver to get warm...

Page 3 - CONTENTS

CONTENTS 1. BEFORE OPERATION ......................................... 5 2. SPECIFICATIONS and ACCESSORIES .............. 63. INSTALLATION INSTRUCTIONS...................... 84. OPERATION ....................................................... 12 4-1 OPERATING CONTROLS..................................

Page 5 - Cleaning

1. BEFORE OPERATION To prevent electric shock, fire and other injury, please note the following: Never remove the case unless instructed to do in this Instruction Manual. If the internal parts are touched accidentally, a serious electric shock might occur. Do not place this unit where it will be exp...

Page 6 - SPECIFICATIONS and ACCESSORIES; low

2. SPECIFICATIONS and ACCESSORIES 2-1. SPECIFICATIONS 144 MHz Band 220 MHz Band 440/430 MHz Band G E N ER A L Frequency range MHz U.S. A and Canada 144 ~148 220 ~225 438 ~450 Other market 144 ~148 — 430 ~440 TM-741E 144 ~146 — 430 ~440 Mode F3E(FM) Antenna impedance 50D Operating temperature -20'C~+...

Page 10 - Battery Connections

3-2-2. Mobile Installations Battery Connections Cautions 1. Before installing the power cable, be sure to remove the negative lead from the battery for safety. 2. After installation and wiring, be sure to double check for correct installation before reconnecting the negative lead to the battery term...

Page 15 - I Function key Assignments

I Function key Assignments Press the F key for longer than 1 second so that the key indicator begins to flash, then press the key below. Key Function Refer to F 1 Sec, VFO Change Scan Hold/ Resume mode P.36 4-5-2 F 1 Sec, M R Memory channel lockout P.40 4-5-10 F 1 Sec, M Hz Automatic Power off funct...

Page 17 - issBBRBs; BBBB; Press and hold

(DPF(Programmable Function) key This key can be programmed to perform any of the following functions: BAND SEL (*^) key (Initial setting from the factory); or MHz, T.ALT, TONE, REV, DTSS, LOW, MUTE, or CONT SEL (^) key. To program the key use the following procedure: 1. Turn off the POWER switch on ...

Page 18 - ►Microphone terminal connection; Receive audio for; l O H S; ®CTCSS

►Microphone terminal connection 4-1-3. Display Panel (Front view) Receive audio for the selected TX band (100mV/l0kn) Receive Audio Output Band Selection (RD) connector The RD terminal will supply an audio signal during receive on the same band that has been selected for transmit. Press the F key fo...

Page 19 - SO; OFF; TOT

& Ts 8.8:8.8s Шв88:8.8.1 !Ts 88:8.8. *88 'Ш“!!1Ч“Ч!Ш SI *88 |ИРдаччч<Ш SI *88 в»'Ш!Ш|Ш! SI —+ REV CTCSS CO DTSS ^ SO. — + REV CTCSS CO DTSS ^ ■4ЕШ^ SO CTCSS CO m ON Ч ж г _ A.LOC C AP J TOT A.B.C MUTE ^ 1 8 8 Displays the operating frequency to the ® nearest kHz digit, or the tone frequency. ...

Page 20 - We recommend the use of the optional external speaker

4-1-4. Rear Panel and Side Case Example 144MHz. TM-741A/741E- 440/430MHZ TM-641A 220MHz P J ■ 144MHz ■TM-741A/741E 440/430MHZ TM-641A 220MHz 144MHz band w (DANTENNA connectorAttach an antenna with a low SWR and impedance of 50 ohms.(2) 13.8 VDC power input connectorConnect the supplied DC power cabl...

Page 22 - Mode selection; tons

7. Turn off the transceiver’s Power switch before you turn off the power supply, or in a vehicle, before you stop the engine. 4-2-2. Frequency Selection You can change the dial frequency while in the VFO mode. The frequency can also be stored in memory, or in the call channel. 1. Press the VFO key t...

Page 23 - more than; d j; lore than

The chart below illustrates the way the displayed frequency will change when you change from one step size to another. 5,10,15,20 to 12.5,25 12.5,25 to 5,10,15,20 0,5,10,15 0 20,25,30,35 25 40,45,50,55 50 60,65,70,75, 80,85,90,95 75 0 0 12.5 10 25 20 37.5 30 50 50 62.5 60 75 70 87.5 80 For example:A...

Page 25 - o c o; lllllllllllllll; BUSY

1. Press the F key for longer than 1 second. The F indicator will begin to flash.Press the BAND SEL key for the bands you wish to turn on/off. A Calender will be displayed. 4-2-6. Band Selection more than 1 second I n u c ‘ ^ u n n n l U T J I ’ ^ l . U U U 3 1 1 2 3 2. Press the BAND SEL key again....

Page 26 - ALT

The ALT system operates similar to an AFC (Automatic Frequency Control) system. This system is useful when the frequency of either station starts to drift. When this occurs distortion of the signal is the usual result. The ALT system will detect the drift and shift the frequency to compensate. 1. Pr...

Page 27 - - 3 . T R A N S M I T T E R O P E R A T I O N

4 - 3 . T R A N S M I T T E R O P E R A T I O N 4-3-1. Transmission CAUTIONS 1. Ensure that an antenna with a low standing wave ratio (less than 1.5 SWR) is attached to the antenna connector before attempting to transmit. Failure to provide proper termination may result in damage to the final amplif...

Page 28 - The F indicator will begin to flash. Press the LOW; Select the desired time-out time by rotating the; i i; lllllllllllfll

The transceiver has a time-out timer function to prevent possible problems caused by continuous transmission. This function forcibly stops continuous transmission after a certain time.The time-out time is 3, 5,10, 20, or 30 minutes or OFF (no limit).1. Press the F key for longer than 1 second. 2. Th...

Page 29 - RESET

4-4. MEMORY 4-4-1. Microprocessor Memory Back-up A lithium battery is contained in this transceiver fo retain memory. Turning off the POWER switch, disconnecting the power cable or an intermittent power failure will not erase the memories. The battery life is estimated at 5 years. When the battery h...

Page 30 - Can be stored in Memory.

VFO RESET The microprocessor’s VFO memory (without memory channels 1~100, CALL channel, and paging memory channel) will be initialized. ALL BAND mode 1. Turn the Power switch off. 2. Press and hold the VFO key and turn on the POWER switch. 3. Release the VFO key. INDIVIDUAL BAND mode 1. Turn the Pow...

Page 31 - lOHS; •Normal channel; TX frequency entry

1. Press the VFO key to select the VFO mode. 2. Select the desired receiver frequency, tone information etc. (For example 443.600MHz) 3. Press the F key momentarily. The F indicator will light on the display, and a memory channel number will appear. 4-4-5. Memory Entry 5. / lOHS , . , u n n n ° ^ D ...

Page 32 - •Memory Bank link

’ I 0 H 5 , . , u n n n I H i . u u u 9. To check the transmit frequency press the REV key. The transmit frequency will appear in the display. #Call Channel 1. Press the VFO key to select the VFO mode.2. Select the desired Call channel frequency, tone data, etc. 3. Press the F key momentarily. The F...

Page 33 - iLink status check

3. Press the band CONT SEL key for linking with the high-order bank. 03 I D H S , , u n n n ™ D l u n I ' i i . u u u H ' i J . i i u ----- ---- i ' i --------------- Number 14 indicates the previous memory channel. iLink status check 1. Press the CONT SEL key to select the desired operating band. 2...

Page 34 - •Memory Consolidation

•Memory Consolidation It is possible to rearrange the memory channels on the transceiver to optimize memory scan operations. This is an advantage especially if there are a large number of open channels separating those channels that actually contain data. Memory Consolidation causes the active memor...

Page 40 - Demonstration mode

This function allows you to specify which memorychannels you wish to skip during memory channel scan. 1. Press the MR key to select the memory channel mode. 2. Select the memory channel that you wish to skip by turning the Tuning control or pressing the microphone UP/DWN keys. 3. Press the F key for...

Page 41 - • Offset Direction; Band Plan with regard to transmitter offset direction.

4-6. REPEATER OPERATION 4-6-1. Transmitter Offset All amateur radio repeaters use a separate receive and transmit frequency. The receive frequency may be above or below the transmit frequency. The configuration of most repeaters fall into one of the categories listed below: 145.1 145.5 146.0 146.4 1...

Page 44 - I D 4 S; T u; more than 1

4-7. DTSS (Dual Tone Squelch System) (Requires optional DTU-2) This function allows the squelch to be turned on in the receive mode on reception of a three-digit code matching the DTSS code selected in your radio.Once the squelch is turned on by reception of a matching code, it operates normally fro...

Page 47 - Paging Code

Seven different paging code memories have been priovided. 4-8-1. Paging Code Memories Paging Code Memory No. Usage A Stores your own station code. 0 Automatically stores the calling station’s code during receive. Can be used to temporarily store the code for the station to be called. 1~5 Stores grou...

Page 48 - Code Setting; Tuning control; dj; Tuning control

Code Setting ? ^DTSS^ ^DTSS^ -1 ^ (^DTSS^ / n u r _ ^ ^ n n n n i u “ j f%,r H H u . u u u P R . Tuning control End of code setting Tuning control 1 n u r n t > t l u n j r ' 1 1 1 ^ ^ n n n n R R u . u u u P R ______ ^ ^DTSs) . except ^ (^DTSS^ Your station ID code should be programmed in Paging...

Page 49 - Stand by with individual code

For example, the following groups communicate with each other. Predetermined frequency 144.660MHz Group code Member 1 Member 2 Member 3 Member 4 789Individual code 111 Individual code 222 Individual code 333 Individual code 444 Member 1 A 111 0 1 23 7894 444 ★5 Member 2 Member 4 A 222 A 444 2 789 4 ...

Page 50 - Stand by with group code.; Error

Stand by with group code. If the calling station transmits the group code, the group code and the Paging Mode Memory Channel Number that contains that code will display.(Example : For member 2, group code 789 is stored in Paging Mode Memory Channel 2.) This Paging Mode Memory Channel Number is somet...

Page 52 - Alarm Sound Selection; b E; b E L E; b E L 3

Alarm Sound Selection The transceiver provides three different Alarm sound. 1. Press the CONT SEL key for the band to select the Alert tone. 2. Turn the Power switch off.3. Press and hold the F key and the SHIFT key then turn the Power switch on. The current Alert sound indicator will light. Alert s...

Page 53 - ADJUSTMENT; Press the F key for longer than a second, then press; dJ; more than 1 SEC; GfD; b s; The number 0 to 9 on the frequency display are assigned

dj d d ,. . O fl o n H H u . u u u Select the desired value (D1 to D4) with the tuning control or the UP/DWN key on the microphone.If, after 10 seconds, no key has been pressed, the displayed level is set and the previous frequency is redisplayed. 4-12. BEEP TONE LEVEL ADJUSTMENT The beep can be set...

Page 54 - n n n n LOOK

4-14. KEY LOCKS There are three types of lock function. ® Microphone key lock When the switch on the rear of the microphone is set to the LOCK position, all the microphone keys except the PTT switch are disabled. LOCK »LOCK All the panel keys and the Tuning control are disabled. However, the microph...

Page 55 - R d J; n n n n; Week

i 5. CLOCK 5-1. CURRENT TIME AND DATE There is a Backup Switch to retain clock memory. If you set the switch ON ,turning off the POWER switch, disconnecting the power cable or an intermittent power failure will not erase the clock memories. 5-1-1. Back-up Switch Before setting the clock Backup Switc...

Page 57 - I n u c; loff

5-2-2 Time-ON/Time-OFF programming 1. In the clock mode, press and hold the F key, then press the CONT SEL key. The ON indicator will flash. dj t CD I n u c l u n j i □ O N 2. Selecting the TIME-ON or TIME-OFF Within 10 seconds press the MUTE key. The ON indicatoe will turn off then the OFF indicato...

Page 59 - CiD; •Return to Frequency Display; •Return to Frequency Display

When the F key is pressed for longer than 1 second, then the BAND SEL key for the last frequency band is pressed, the STOP WATCH will turn on or off. CiD more than 1 sec i c p n „ „ n n n n I D L U u u U U . U U -•,23 ummmmlllt ^ j mmiraiH) •Return to Frequency Display Press the F key for longer tha...

Page 62 - •IN CASE OF DIFFICULTY

•IN CASE OF DIFFICULTY The problems described in this table are failures caused, in general, by improper operation or connection of the transceiver, not by defective components. Examine and check according to the following table. Symptom Probable cause Corrective action Indicators do not light and n...

Page 63 - or

Some dial frequency relationships may result in internal heterodyne tones being generated by the TM-641A/ 741A/ 741E. This is not a defect.The following formulas may be used to determine if a tone will be present with a particular frequency relationship.If any of the following equations are true, a ...

Page 64 - OPTIONAL ACCESSORIES

7. OPTIONAL ACCESSORIES CTCSS UNIT DTMF UNIT TSU-7 DTU-2 7-1. ACCESSORIES MOBILE MOUNT BRACKET MB-11 DE'I ACHABLE FRONT PANEL KIT PG-4K DETACHABLE FRONT PANEL KIT PG-4L MULTI FUNCTION MULTI FUNCTION DC LINE MICROPHONE MICROPHONE WITH DTMF NOISE FILTER MC-45/45E MC-45DM/45DMEPG-3G (E;European version...

Page 65 - INSTALLING OPTIONAL ACCESSORIES

INSTALLING OPTIONAL ACCESSORIES CAUTION Before installation, be sure to disconnect the DC power supply, or damage may occur to the equipment. 7-2. CTCSS UNIT (TSU-7) 1. Slide the release button on the front panel to the right. Pull the front panel toward you from the right, then remove the whole pan...

Page 66 - Microphone; PF

■With the optional DTU-2 DTMF unit is installed, the DTSS key functions the signaling mode selection key. We recommend that to perform the microphone PF key to program the Tone Representation function.See page 53 BEEP TONE FREQUENCIES 7-3-2. Frequency Entry with DTMF Microphone With the optional DTM...

Page 67 - ■Storing the DTMF codes; ■Recalling stored DTMF code in receive mode; l г з; ■Making a DTMF Call

7-3-3. DTMF Memory With the optional DTMF unit DTU-2, DTMF telephone numbers can be stored into memory. ■Storing the DTMF codes 1. Press and hold the F key and the CALL key, then turn the POWER switch ON to select the DTMF code entry mode. C£) (HD POWER (( '¡¡) p -------------------- ■Recalling stor...

Page 68 - Unplug the microphone from the main unit, and

7-4. PANEL SEPARATION KIT (PG-4K/4L) PG-4K PowerSupply PG-4L DC Cable (6m) Speaker Cable (5m) 1. Slide the release button on the front panel to the right. Pull the front panel unit toward you from the right, then remove the whole panel unit. Be careful with the cord connecting the front panel unit a...

Page 70 - •Installation Using Velcro Fastener; NOTE

7-5. BRACKET Loosen the bracket screws and put the two plates at right angles. Attach the front panel unit to the bracket using the three supplied screws. Install the bracket using the supplied flat washers and •Installation Using Velcro Fastener NOTE The bracket may come off due to vibration or sho...

Page 71 - Before installing any band unit be

7-6 BAND UNITS Any of the following optional band units may be installed in the TM-741A/741E.The same instructions apply for the Tri-Bander as for the Dual-bander. ®. Remove the cases. ©Loosen the 4 screws on the top and bottom cover. ©Remove the 4 screws securing the top case. ©Remove the 4 screws ...

Page 72 - Remove the cooling fan assembly.; ®. Be sure to unplug the dc cable before; Remove the 4 screws

Remove the cooling fan assembly. Disconnect the conector. Remove the 4 screws securing the fan case. Remove the fan case. 0 REmove the spacer. Remove the 2 long screws securing the spacer. Remove the spacer. 72 ®. Be sure to unplug the dc cable before removing the terminal plate. 0 Remove the 4 scre...

Page 73 - Replace the cooling fan assembly.; Attach the connector.

(6). Tighten the new band unit. ® Tighten the 2 side screws to secure the new band unit in place. d) Insert the 2 long screws. (3) Tighten the 2 long screws while holding the nuts and lock rings from the opposite side. (7). Attach the 3 unit terminal plate. ® Insert the 3 unit terminal plate. (2) Ti...

Page 75 - SOM Hz band

3. To activate the optional band unit, reset the memory for the band. 1. Turn the POWER switch OFF. 2. Press and hold the F key and the BAND SEL key for the band, then turn ON the POWER switch. After 1 second all the indicators for the band will light. ’ress and Hold Then turn ON 3. Confirm the indi...

Page 76 - T r ansmitter Offsets; son

4-2-7. Attenuator ON/OFF (With the UT-28S/50S) See page 25. 4-2-8. ALT (Automatic Lock Tuning) (With the UT-1200) See page 26. 4-3-4. Bandwidth Selection (With the UT-28S) See page 28. 4-4-2. Microprocessor Initialization band 28MHz 50MHz 1200MHz VFO, Call and Memory channel 1 frequency 29.000 MHz 5...