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INSTRUCTION MANUAL
144 MHz FM TRANSCEIVER
TH-255A
© B62-1981-00 (K, M)
09 08 07 06 05 04 03 02 01 00
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Thank You We are grateful you decided to purchase this Kenwood FM transceiver. Kenwood always provides Amateur Radio products which surprise and excite serious hobbyists. This transceiver is no exception. Kenwood believes that this product will satisfy your requirements for both voice and data communications. Fea Tures • Compact design • Aluminum die-cast chassis • High output power (up to 5 W operation) • 100 memory channels or 50 channels with names • Long operation period with a Ni-MH
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Notices to the User ◆ Government law prohbts the operaton of unlcensedrad o transmtters wthn the terrtores under government control. ◆ Illegal operaton s punshable by fne and/or mprsonment. ◆ Refer servce to qualfed techncans only. Safety:It s mportant that the operators aware of,and understands, hazards common to the operaton ofany transcever. PrecaUtioNs • Do not charge the transcever and battery pack whenthey are wet. • Ensure that
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Turn the transceverpower off n the followng locatons: • In explosveatmospheres (nflammable gas, dustpart cles, metallc powders, gran powders,etc.). • Whle takng on fuelor whle parkedat gasolne servcestat ons. • Near explosves or blastng stes. • In arcrafts. (Any use of the transcever must follow the nstructons and regulatons provded by the arl ne crew.) • Where restrctonsor warnngs areposted regardng the useof rado devce
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One or more of the following statements may be applicable: FCC WARNING Ths equpmentgenerates or uses rado frequency energy. Changes ormod fcatons to ths equpment may cause harmful nterference unlessthe modfcatons are expressly approved n the nstructon manual. The user could lose the authorty to operate ths equpment f an unauthorzed change or modfcaton s made. INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE FCC Thsequ pment has been tes
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CONTENTS PREPARATION...............................................................1 Supplied Acce SSorie S ....................................................1 i n St Alling the o ption Al p B-43n n i -Mh B Attery p Ack ...............2 i n St Alling Alk Aline BAtterie S ...........................................3 i n St Alling the Antenn A ..................................................4 i n St Alling the Betl c lip .................................................4 GETTING.ACQUAINTED....
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Storing Si Mplex Frequencie S or St And Ard r epe Ater Frequencie S .. 28 Storing o dd -Split r epe Ater Frequencie S ............................ 28 c ontinuou Syl Storing in Si Mplex or Split c h Annel S ................ 29 r ec Alling A Me Mory c h Annel ......................................... 30 c le Aring A Me Mory c h Annel .......................................... 31 n AMing A Me Mory c h Annel ............................................ 32 Me Mory -to - VF o t r An SFer .............
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Beep Function .......................................................... 57 Bu Sy c h Annel l ockout ................................................ 57 Frequency Step Size ................................................... 58 BAck l ight ............................................................. 58 l ock Function .......................................................... 59 Selector u nlock ....................................................... 59 Microphone k ey l ock ....................
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PREPARATION Supplied Acce SSorie S After carefully unpacking the transceiver, identify the items listed in the table below. We recommend you keep the box and packings for the shipping. Item Part Number Quantity Antenna T90-08-XX Belt clip J29-0623-XX Screw set N99-2066-XX Instruction manual B62-98-XX Antenna Belt clip Screw set
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i n St Alling the o ption Al p B-43n n i -Mh B Attery p Ack Note: The battery pack is not charged at the factory, you must charge the battery pack before using it with the transceiver. 1 Unlock (open) the safety catch located at the bottom of the battery pack. 2 Match the guides of the battery pack with the corresponding grooves on the upper rear of the transceiver, then firmly press the battery case to lock it in place. 3 Flip the safety catch into place to prevent accidentally pressing
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i n St Alling Alk Aline BAtterie S 1 To open the optional BT- 4 battery case lid, insert your thumb or finger into the hole on the top of the battery case, then pull the cover up. 2 Insert (or remove) six AA (LR6) Alkaline batteries. • Be sure to match the battery polarities with those marked in the bottom of the battery case. 3 Align the two tabs at the bottom of battery case, then close the cover until the locking tabs on top click. 4 To install the battery case onto (or remove it fr
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i n St Alling the Antenn A Screw the antenna into the connector on the top of the transceiver by holding the antenna at its base and turning it clockwise until secure. Note: The antenna is neither a handle, a key ring retainer, nor a speaker/ microphone attachment point. Using the antenna in these ways may damage the antenna and degrade your transceiver’s performance. i n St Alling the Btel c lip If necessary, attach the belt clip using the two supplied 3 x 4 mm screws. Note: If the belt
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GETTING ACQUAINTED k ey S And c ontorl S Antenna Display SP/MIC jack cover Speaker Microphone 5
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q [PTT] Press and hold [PTT] to transmit. Press [F], [PTT] to toggle the transmit output power between High and Low {page 4}. [MENU] w Press [MEMU] to enter Menu mode {page 5}. Press [F], [MEMU] to turn the transceiver key lock function ON or OFF {page 59} e [UP]( )/ [DOWN]( ) Press [UP]/ [DOWN] to adjust the Volume Level {page 0}. r Selector Rotate the Selector to select an operating frequency or Memory channel, change the scan direction, select a Menu, etc. t [CALL] Press [CALL]
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! 0 [MON] Press [MON] to turn the Monitor function ON and OFF {page 62}. Press [F], [MON] to enter Squelch Level Adjustment mode {page }. Numeric Keypad ! 1 [1] Press [F], [1] to select the Signaling (Tone, CTCSS and DCS) function {pages 20, 43, 46}. [2] Press [F], [2] to enter the Tone frequency setup mode {page 2 }. Press [F], [2] (1s) to start Tone frequency ID scan {page 22}. [3] Press [F], [3] to change the Frequency step size {page 58}. [4] Press [F], [4] to enter the DCS code se
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d i Spl Ay Indicator Description Appears while transmitting {page 4}. Remaining battery capacity indicator (when you transmit in low power) {page 54}. Appears when the Tone function is ON {page 20}. Appears when the CTCSS function is ON {page 43}. Appears when the DCS function is ON {page 46}. Appears when the Speaker Attenuation function is ON {page 67}. Appears when a Priority Scan function is ON {page40}. Displays the strength of received signals. An antenna and all 3 strength bars
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Indicator Description Appears when the Key Lock function is ON {page 5 }. Appears when the Offset direction is set to plus {page 1 }. Appears when the Offset direction is set to minus {page 1 }. Appears while using Low output power {page 14}. Appears when the Reverse function is ON {page 24}. Appears when the ASC function is ON. Blinks when the ASC function is performing an OK check {page 24}. Appears when the [F] key is pressed. Note: While the Battery Saver is operating {page 55}, t
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BASIC OPERATION Switching the p ower on /o FF 1 Press [ ] (POWER) to switch the transceiver ON. • The power on message momentarily appears on the display. • If the transceiver power on password has been activated {page 67}, you must first enter your password before you can operate the transceiver. 2 To switch the transceiver OFF, press [ ] (POWER) again. Adju Sting the Volu Me Press [UP] to increase the audio output level and press [DOWN] to decrease the output level. • If you are not re
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2 Press [F], [#] to toggle the setting between “SEL” and “UP/DN”. SEL: Adjust the volume using the Selector. To change the channel number or frequency, use [UP]/ [DOWN] keys. UP/DN: Adjust the volume using [UP]/ [DOWN] keys. To change the channel number or frequency, use the Selector. Adju Sting the Squelch l e Vel The purpose of Squelch is to mute the speaker when no signals are present. With the squelch level correctly set, you will hear sound only while actually receiving signals. T
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Selecting A Frequency ■ VFO Mode This is the basic mode for changing the operating frequency. Rotate the Selector clockwise (or press [UP]) to increase the frequency and counterclockwise (or press [DOWN]) to decrease the frequency. ■ MHz Mode If the desired operating frequency is far away from the current frequency, it is quicker to use the MHz Tuning Mode. To adjust the MHz digit: 1 Press [F]. • The MHz digit blinks. 2 Rotate the Selector (or press [UP]/ [DOWN]) to select the desi
