Kenwood TH-255A User Manual

Kenwood TH-255A Manual

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  • Kenwood TH-255A | User Manual - Page 1
    INSTRUCTION MANUAL 144 MHz FM TRANSCEIVER TH-255A © B62-1981-00 (K, M) 09 08 07 06 05 04 03 02 01 00
  • Kenwood TH-255A | User Manual - Page 2
    and excite serious hobbyists. This transceiver is no exception. Kenwood believes that this product will satisfy your requirements for both in this Manual The writing conventions described below have been followed to simplify instructions and avoid unnecessary repetition. Instruction Action Press
  • Kenwood TH-255A | User Manual - Page 3
    operation is punishable by fine and/or imprisonment. ◆ Refer service to qualified technicians only. Safety: It is important that between the transceiver and the battery pack. • Do not use options not specified by Kenwood. • If the die-cast chassis or other transceiver part is damaged, do not touch
  • Kenwood TH-255A | User Manual - Page 4
    at gasoline service stations. • Near explosives or blasting sites. • In aircrafts. (Any use of the transceiver must follow the instructions and regulations immediately, remove the battery pack from the transceiver, and contact your Kenwood dealer. • Use of the transceiver while you are driving may
  • Kenwood TH-255A | User Manual - Page 5
    radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made. INFORMATION TO
  • Kenwood TH-255A | User Manual - Page 6
    CONTENTS PREPARATION 1 Supplied Accessories 1 Installing the Optional PB-43N Ni-MH Battery Pack 2 Installing Alkaline Batteries 3 Installing the Antenna 4 Installing the Belt Clip 4 GETTING ACQUAINTED 5 Keys and Controls 5 Display 8 BASIC OPERATION 10 Switching the Power ON/OFF 10
  • Kenwood TH-255A | User Manual - Page 7
    Mode 35 SCAN 36 Selecting a Scan Resume Method 37 Band Scan 37 Program Scan 38 Memory Scan 39 Call Scan 40 Priority Scan 40 Memory Channel Squelch System (CTCSS 43 Digital Coded Squelch (DCS 46 DTMF FUNCTIONS 49 Manual Dialing 49 DTMF TX Hold 50 Automatic Dialer 50 Adjusting the DTMF
  • Kenwood TH-255A | User Manual - Page 8
    66 Speaker Attenuation 67 Power On Password 67 OPTIONAL ACCESSORIES 69 MAINTENANCE 70 General Information 70 Service 70 Cleaning 71 Microprocessor Reset 71 Operation Notices 73 Receiving Signals in Cities 73 Transmission 73 Internal Beats 73 TROUBLESHOOTING 74 SPECIFICATIONS 77 vi
  • Kenwood TH-255A | User Manual - Page 9
    , identify the items listed in the table below. We recommend you keep the box and packings for the shipping. Item Antenna Belt clip Screw set Instruction manual Part Number T90-1018-XX J29-0623-XX N99-2066-XX B62-1981-XX Quantity 1 1 1 1 Antenna Belt clip Screw set 
  • Kenwood TH-255A | User Manual - Page 10
    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
  • Kenwood TH-255A | User Manual - Page 11
    Installing Alkaline Batteries 1 To open the optional BT-14 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
  • Kenwood TH-255A | User Manual - Page 12
    Installing the Antenna 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
  • Kenwood TH-255A | User Manual - Page 13
    GETTING ACQUAINTED Keys and Controls Antenna Display SP/MIC jack cover Speaker Microphone 
  • Kenwood TH-255A | User Manual - Page 14
    q [PTT] Press and hold [PTT] to transmit. Press [F], [PTT] to toggle the transmit output power between High and Low {page 14}. w [MENU] Press [MEMU] to enter Menu mode {page 15}. Press [F], [MEMU] to turn the transceiver key lock function ON or OFF {page 59} e [UP]( )/ [DOWN]( ) Press [UP]/ [DOWN]
  • Kenwood TH-255A | User Manual - Page 15
    !0 [MON] Press [MON] to turn the Monitor function ON and OFF {page 62}. Press [F], [MON] to enter Squelch Level Adjustment mode {page 11}. !1 Numeric Keypad [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
  • Kenwood TH-255A | User Manual - Page 16
    Display Indicator  Description Appears while transmitting {page 14}. 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}.
  • Kenwood TH-255A | User Manual - Page 17
    Indicator Description Appears when the Key Lock function is ON {page 59}. Appears when the Offset direction is set to plus {page 19}. Appears when the Offset direction is set to minus {page 19}. Appears while using Low output power {page 14}. Appears when the Reverse function is ON {page 24}.
  • Kenwood TH-255A | User Manual - Page 18
    BASIC OPERATION Switching the Power ON/OFF 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
  • Kenwood TH-255A | User Manual - Page 19
    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. Adjusting the
  • Kenwood TH-255A | User Manual - Page 20
    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
  • Kenwood TH-255A | User Manual - Page 21
    Direct Frequency Entry In addition to rotating the Selector (or pressing [UP]/ [DOWN]), there is another way to select the frequency. When the desired frequency is far away from the current frequency, you can directly enter a frequency using the numeric keypad. 1 Press [VFO]. • You must be in the
  • Kenwood TH-255A | User Manual - Page 22
    Transmitting 1 To transmit, hold the transceiver approximately 5 cm (2 inches) from your mouth, then press and hold [PTT] and speak into the microphone in your normal tone of voice. • The " " icon appears. • If you press [PTT] while you are outside of the transmission coverage, a high pitched error
  • Kenwood TH-255A | User Manual - Page 23
    selected or configured via a software-controlled Menu rather than through the physical controls of the transceiver. Once you become familiar with the Menu system, you will appreciate its versatility. You can customize the various timings, settings, and programming functions on this transceiver to
  • Kenwood TH-255A | User Manual - Page 24
    4 Rotate the Selector (or press [UP]/ [DOWN]) to select your desired parameter. 5 Press [MENU] to store the new setting. 6 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. Menu Function List Menu No. Display Description Setting Values Default Ref. Setting Page 1 P.VFO
  • Kenwood TH-255A | User Manual - Page 25
    Menu No. Display 11 EMG 12 TOT 13 BCL 14 TXI 15 P.ON. MSG 16 BP Description Setting Values Emergency siren Time-out Timer Busy channel lockout TX inhibit Power On message Beep OFF/ VOL/ MED/ MAX 3/ 5/ 10 min ON/ OFF ON/ OFF 6 characters ON/ OFF Default Ref. Setting Page OFF 65 10 64
  • Kenwood TH-255A | User Manual - Page 26
    OPERATING THROUGH REPEATERS Repeaters are often installed and maintained by radio clubs, sometimes with the cooperation of local businesses involved in the communications industry. Compared to simplex communication, you can usually transmit over much greater distances by using a repeater. Repeaters
  • Kenwood TH-255A | User Manual - Page 27
    Repeater Access Most repeaters use a receive and transmit frequency pair with a standard or non-standard offset (odd-split). In addition, some repeaters must receive a tone from the transceiver in order to gain access to the repeater. For details, consult your local repeater reference. ■ Selecting
  • Kenwood TH-255A | User Manual - Page 28
    ■ Selecting an Offset Frequency To access a repeater which requires an odd-split frequency pair, change the offset frequency from the default which is used by most repeaters. 1 Enter Menu mode and access Menu No. 2 (OFFSET). 2 Press [MENU], then rotate the Selector (or press [UP]/ [DOWN]) to select
  • Kenwood TH-255A | User Manual - Page 29
    Selecting a Tone Frequency To select the tone frequency required to access your desired repeater: 1 Press [F], [2]. • The current tone frequency appears on the display. The default frequency is 88.5 Hz. 2 Rotate the Selector (or press [UP]/ [DOWN]) to select your desired frequency. 3 Press any key
  • Kenwood TH-255A | User Manual - Page 30
    , rotate the Selector (or press [UP]/ [DOWN]). • When the tone frequency is identified, a beep sounds and the identified frequency blinks. 2 Press [MENU] to program the identified frequency in place of the current tone frequency. • Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit the Scan
  • Kenwood TH-255A | User Manual - Page 31
    Repeater Offset (K type only) This function automatically selects an offset direction, according to the frequency on the 2 m band. The transceiver is programmed for offset directions as shown below. To obtain an up-to-date band plan for repeater offset direction, contact your national Amateur Radio
  • Kenwood TH-255A | User Manual - Page 32
    Reverse Function After setting a separate receive and transmit frequency, you can exchange these frequencies using the Reverse function. This allows you to manually check the strength of signals you receive directly from other stations, while using a repeater. If the station's signal is strong, move
  • Kenwood TH-255A | User Manual - Page 33
    • While direct contact is possible, without the use of a repeater, the " " icon will blink. Note: ◆ Pressing [PTT] will cause the icon to stop flashing. ◆ ASC does not function if you are using simplex operation. ◆ ASC does not function while scanning. ◆ Activating ASC while using Reverse will
  • Kenwood TH-255A | User Manual - Page 34
    and related data that you frequently use so that you do not need to reprogram that data every time. You can quickly recall a programmed channel through simple operation. A total of 100 memory channels (50 when using the Memory Name function) are available for storing frequencies, modes and
  • Kenwood TH-255A | User Manual - Page 35
    ◆ If you change the memory channel capacity from 50 channels to 100 channels after storing Memory names in those channels, all Memory name data will be erased. Simplex & Repeater or Odd-Split Memory Channel? You can use each memory channel as a simplex & repeater channel or as an odd-split channel.
  • Kenwood TH-255A | User Manual - Page 36
    frequencies with a non-standard offset. If you store two separate frequencies in a memory channel, you can operate on those repeaters without programming the offset frequency and direction. 1 Store the desired reception frequency and related data by following the procedure given for simplex or
  • Kenwood TH-255A | User Manual - Page 37
    4 Press [PTT] + [MR]. • The transmission frequency is stored in the memory channel. Note: When you recall an odd-split memory channel, " " and " " appear on the display. To confirm the transmission frequency, press [F], [7] (Reverse function). Continuously Storing in Simplex or Split Channels Using
  • Kenwood TH-255A | User Manual - Page 38
    To also store a transmit frequency, proceed to step 6; otherwise proceed to step 10. 6 Press [ ], then rotate the Selector (or press [UP]/ [DOWN]) to select the desired transmit frequency. • The frequency selected in step 3 will be used as a receive frequency. 7 Press [ ], then rotate the Selector (
  • Kenwood TH-255A | User Manual - Page 39
    press [#], [9], [#]. You can also press [#], [0], [9]. Note: ◆ You cannot recall an empty memory channel. An error beep sounds. ◆ You cannot recall the Program Scan memory channels (L0/U0 ~ L2/U2), Priority Channel (Pr) using the numeric keypad. ◆ When you recall an odd-split memory channel, " " and
  • Kenwood TH-255A | User Manual - Page 40
    Note: ◆ Call Channel data cannot be cleared. ◆ You can also clear the Priority Channel, and L0/U0 ~ L2/U2 channels. ◆ While the transceiver is in Channel Display Mode or Lock function is activated, you cannot clear the channel data. Naming a Memory Channel You can name memory channels using up to 6
  • Kenwood TH-255A | User Manual - Page 41
    • After storing a Memory name, the Memory name appears in place of the operating frequency. However, you can still display the operating frequency, if desired. To display the frequency rather than Memory name, access Menu No. 6 (MDF) and select "FRQ". This menu toggles the display mode between the
  • Kenwood TH-255A | User Manual - Page 42
    ] again. Reprogramming the Call Channel 1 Select your desired frequency and related data (Tone, CTCSS, DCS, or offset direction, etc.). • When you program the Call Channel as an odd-split channel, select a reception frequency first. 2 Press [F], [CALL]. • The selected frequency and related data are
  • Kenwood TH-255A | User Manual - Page 43
    • The separate transmission frequency is stored in the Call Channel. Note: ◆ When you recall an odd-split Call Channel, " " and " " appear on the display. ◆ Transmit offset status and Reverse status are not stored in an odd- split Call Channel. Channel Display Mode While in this mode, the
  • Kenwood TH-255A | User Manual - Page 44
    Scan will increase your operating efficiency. This transceiver provides the following types of scans: ◆ Band Scan Scans all frequencies on the current band. ◆ Program Scan Scans the specified frequency ranges stored in Memory channels L0/U0 ~ L2/U2. ◆ Memory Scan Scans all frequencies stored in the
  • Kenwood TH-255A | User Manual - Page 45
    operating and receiving at 144.525 MHz, it scans all the frequencies available for the 2 m band. When the current VFO receive frequency is outside the Program Scan frequency range {page 38}, the transceiver scans the entire frequency range available for the current VFO. 37
  • Kenwood TH-255A | User Manual - Page 46
    [UP]) or counterclockwise (or press [DOWN]) . 4 To exit Band Scan, press any key other than [MON], [UP]/ [DOWN] or [ ]. Program Scan You can limit the scanning frequency range. There are 3 memory channel pairs (L0/U0 ~ L2/U2) available for specifying the start and end
  • Kenwood TH-255A | User Manual - Page 47
    example, if you selected L0 in step 3, select U0 for the end frequency. 6 Press [MR] to store the end frequency in the memory channel. ■ Using Program Scan 1 Press [VFO], then rotate the Selector (or press [UP]/ [DOWN]) to select a frequency within the frequency range of memory channel L0/U0 ~ L2/U2
  • Kenwood TH-255A | User Manual - Page 48
    2 To stop Memory Scan, press any key other than [MON], [UP]/ [DOWN] or [ ]. Note: ◆ You must have 2 or more memory channels that contain data, excluding special function memory channels (L0/U0 ~ L2/U2, and PRI). ◆ You can perform Memory Scan in Channel Display Mode {page 35}. Call Scan 1 Select the
  • Kenwood TH-255A | User Manual - Page 49
    when the Priority Scan is ON. Note: ◆ If a signal is received on a Priority Channel with a CTCSS or DCS code programmed, the Priority Channel is recalled only when the programmed tone/ code matches. ◆ Press and hold [MON] to pause Priority Scan when the transceiver is not displaying the Priority
  • Kenwood TH-255A | User Manual - Page 50
    Press [F], [9] to toggle locked out ON and OFF. • The " " icon appears below the memory channel number, indicating the channel is locked out. Note: ◆ The Program Scan memories (L0/U0 ~ L2/U2), Priority Channel (Pr) cannot be locked out. ◆ Even if a memory channel is locked out, you can perform Call
  • Kenwood TH-255A | User Manual - Page 51
    a high CTCSS frequency, receiving audio or noise that contains the same frequency portions may cause CTCSS to function incorrectly. To prevent noise from causing this problem, select an appropriate squelch level. 43
  • Kenwood TH-255A | User Manual - Page 52
    ■ Selecting a CTCSS Frequency 1 Press [F], [5]. • The current CTCSS frequency appears on the display. 2 Rotate the Selector (or press [UP]/ [DOWN]) to select your desired frequency. 3 Press any key other than [MON], [UP]/ [DOWN] or [ ] to store the setting. • The selectable CTCSS frequencies are the
  • Kenwood TH-255A | User Manual - Page 53
    direction, rotate the Selector (or press [UP]/ [DOWN]). • When a CTCSS frequency is identified, the identified frequency appears and blinks. 2 Press [MENU] to program the identified frequency in place of the current CTCSS frequency. • Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit the
  • Kenwood TH-255A | User Manual - Page 54
    Digital Coded Squelch (DCS) Digital Code Squelch (DCS) is another application which allows you to ignore (not hear) unwanted calls. It functions the same way as CTCSS. The only differences are the encode/ decode method and the number of selectable codes. For DCS, you can select from 104 different
  • Kenwood TH-255A | User Manual - Page 55
    Available DCS Code 023 025 026 031 032 036 043 047 051 053 054 065 071 072 073 074 114 115 116 122 125 131 132 134 143 145 152 155 156 162 165 172 174 205 212 223 225 226 243 244 245 246 251 252 255 261 263 265 266 271 274 306 311 315 325 331 332 343 346 351 356 364 365 371 411 412 413 423 431 432
  • Kenwood TH-255A | User Manual - Page 56
    2 Press [MENU] to program the identified DCS code in place of the current DCS code. • Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit the Scan function.
  • Kenwood TH-255A | User Manual - Page 57
    dedicated DTMF memory channels. You can store a DTMF code (16 digits max.) in each of these channels to recall later for speed dialing. Manual Dialing The numeric keypad functions as a DTMF keypad; the 12 keys found on a touch-tone phone plus 4 additional keys (A, B, C, D) on the rightmost column
  • Kenwood TH-255A | User Manual - Page 58
    DTMF TX Hold This function causes the transceiver to remain in Transmission Mode for 2 seconds after you release each key. So, you can release [PTT] while sending the DTMF tones. 1 Enter Menu mode and access Menu No. 21 (DT.H). 2 Press [MENU], then rotate the Selector (or press [UP]/ [DOWN]) to
  • Kenwood TH-255A | User Manual - Page 59
    complete the entry, press [MENU] without selecting a DTMF code. To confirm the stored DTMF code, perform steps 1 and 2, then press [MON]. The programmed DTMF code scrolls through the display without transmitting. 8 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. ■ Transmitting
  • Kenwood TH-255A | User Manual - Page 60
    Note: If you select an empty DTMF memory channel and press [MENU], the frequency display is restored. Adjusting the DTMF Tone Transmission Speed This transceiver allows you to configure the DTMF code transmission speed between Fast (default) and Slow. If a repeater cannot respond to the fast speed,
  • Kenwood TH-255A | User Manual - Page 61
    DTMF Lock Assuming you have a transceiver with the optional speaker microphone installed and you are carrying it in the holder or bag, you sometimes may want to disable the keypad to avoid accidental DTMF transmission. In this case, turn the DTMF Lock function ON. 1 Enter Menu mode and access Menu
  • Kenwood TH-255A | User Manual - Page 62
    AUXILIARY FUNCTIONS APO (Auto Power Off) The transceiver switches OFF automatically if no keys or controls are pressed or adjusted for 30 minutes (default). One minute before the transceiver switches OFF, warning beeps sound for a few seconds and "APO" blinks. You can select the APO time from OFF (
  • Kenwood TH-255A | User Manual - Page 63
    for more than 10 seconds. To reduce battery consumption, this function shuts the receiver circuit OFF for the programmed time, then momentarily turn it back ON to detect a signal. To program the receiver shut-off period for the battery saver: 1 Enter Menu mode and access Menu No. 7 (SAV). 55
  • Kenwood TH-255A | User Manual - Page 64
    2 Press [MENU], then rotate the Selector (or press [UP]/ [DOWN]) to select the receiver shutoff period from OFF, 0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 3.0, 4.0, or 5.0 seconds. 3 Press [MENU] to store the setting. 4 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. Note: ◆ The longer
  • Kenwood TH-255A | User Manual - Page 65
    Beep Function The Beep function provides confirmation of entry, error status, and malfunctions of the transceiver. We recommend you leave this function ON in order to detect erroneous operations and malfunctions. However, to turn the beep function OFF: 1 Enter Menu mode and access Menu No. 16 (BP).
  • Kenwood TH-255A | User Manual - Page 66
    3 Press [MENU] to store the setting. 4 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. Frequency Step Size Choosing the correct frequency step size is essential in order to select your exact receive frequency using the Selector (or [UP]/ DOWN). You can select your desired
  • Kenwood TH-255A | User Manual - Page 67
    Press [ ] (1s). • The light remains ON until you press [ ] (1s) again. Lock Function The lock function disables most of the keys to prevent you from accidentally activating a function. 1 Press [F], [MENU] to turn the Lock function ON. • The " " icon appears when the Lock function is ON. • The
  • Kenwood TH-255A | User Manual - Page 68
    . 24 (M.PF.) is "OFF" or the Lock function is ON, you cannot program PF keys. ◆ If the LOCK switch on the rear of the microphone is ON, you must move the switch to the OFF position to program the keys. 1 Press one of the following key combinations to reprogram the keys on
  • Kenwood TH-255A | User Manual - Page 69
    Key name [UP] [DOWN] [MENU] [CALL] [VFO] [MR] [MON] [1] [2] [3] [4] [5] [6] [7] [8] [9] [0] [] [#] [PTT] Selector [REMO 1] 3 ~ [REMO 3] [KEY] [F] + [KEY] Volume or Function Up 1 Volume or Function Down 1 MENU Key lock CALL CALL IN VFO MR to VFO MR MR IN MON Squelch level Recalling CH 1
  • Kenwood TH-255A | User Manual - Page 70
    Monitor When you are receiving while the squelch function is ON, weak signals may become intermittent. If the CTCSS or DCS function is ON, you may want to disable the squelch function temporarily to monitor the current channel activities. In both of these cases, use the Monitor function to
  • Kenwood TH-255A | User Manual - Page 71
    any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. Programmable VFO If you want to limit the operating frequencies within a certain range, program the upper and lower frequency limits to the programmable VFO parameters. For example, if you select 144 MHz for the lower limit and 145 MHz
  • Kenwood TH-255A | User Manual - Page 72
    Note: ◆ You cannot program the 100 kHz or lower digits. ◆ The upper limit frequency cannot be set lower than the selected lower limit frequency. Time-Out Timer The Time-
  • Kenwood TH-255A | User Manual - Page 73
    3 Press [MENU] to store the setting. 4 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. • "TX INH" appears and an error beep sounds if the transceiver tries to transmit while TX Inhibit is ON. Emergency Siren Press and hold the [0] key for at least 1.5 seconds to emit the siren
  • Kenwood TH-255A | User Manual - Page 74
    ■ Using the Emergency Siren 1 Press [0] (1.5s), to turn the Emergency siren ON. • "EMG" appears. 2 Press [0] (1.5s), [PTT] or power OFF, to turn the Emergency siren OFF. • When the Emergency siren sounds, press [PTT] to turn it OFF. • While the Emergency siren is sounding and a signal is being
  • Kenwood TH-255A | User Manual - Page 75
    3 Press [MENU], then rotate the Selector (or press [UP]/ [DOWN]) to select the maximum volume level (0 - 31). 4 Press [MENU] to store the setting. 5 Press any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. Speaker Attenuation Speaker Attenuation decreases the volume level of the
  • Kenwood TH-255A | User Manual - Page 76
    any key other than [MON], [UP]/ [DOWN] or [ ] to exit Menu mode. When turning the transceiver power ON while the Password function is programmed, "PASSWD" appears on the display. You must enter the password to unlock the transceiver. To enter the password: 1 Press the [0] ~ [9] keys corresponding to
  • Kenwood TH-255A | User Manual - Page 77
    OPTIONAL ACCESSORIES The following options are available for use with this transceiver: • PB-43N Ni-MH battery pack • BT-14 Battery case • SMC-32 Speaker microphone • SMC-33 Speaker microphone • SMC-34 Speaker microphone • HMC-3 Headset • HMC-4 Headset • KHS-21 Headset • EMC-3
  • Kenwood TH-255A | User Manual - Page 78
    return accessory items unless you feel they are directly related to the service problem. You may return this product for service to the authorized Kenwood dealer from whom you purchased it, or any authorized Kenwood service center. Please do not send subassemblies or printed circuit boards; send the
  • Kenwood TH-255A | User Manual - Page 79
    written record of any maintenance performed on this product. ◆ When claiming warranty service, please include a photocopy of the bill of sale or other proof-of- seems to be malfunctioning, resetting the microprocessor may solve the problem. The following 2 reset Modes are available. When performing
  • Kenwood TH-255A | User Manual - Page 80
    2 Press [VFO] to proceed. • "SURE ?" appears. • Press any key other than [ ] or [VFO] to exit the Reset Mode. 3 Press [VFO] to reset the transceiver. ■ Full Reset When the transceiver is turned OFF: 1 Press [PTT] + [F] + Power ON. • The full reset confirmation message, "FL.RST?" appears. 2 Press [F]
  • Kenwood TH-255A | User Manual - Page 81
    Operation Notices The transceiver has been designed and engineered to avoid possible hardware glitches. However, you may notice the following symptoms when you operate the transceiver. These symptoms are not malfunctions. Receiving Signals in Cities When you receive signals in cities, the receiver's
  • Kenwood TH-255A | User Manual - Page 82
    TROUBLESHOOTING The problems described in this table are commonly encountered operational malfunctions and are usually not caused by circuit failure. Problem Nothing appears on the display when the transceiver is switched ON, or the display is blinking ON and OFF. Most keys and the Selector do
  • Kenwood TH-255A | User Manual - Page 83
    Problem Solution You selected a frequency outside the allowable range. Select a frequency within the allowable transmit frequency range. You cannot transmit by pressing [PTT]. You selected a transmit
  • Kenwood TH-255A | User Manual - Page 84
    Problem Solution The transceiver switches OFF for no apparent reason. The Automatic Power OFF". The transceiver returns to Reception Mode during a long transmission. The transmission time exceeded the programmed TOT time. Access Menu No. 12 (TOT) to select your desired transmission length. The
  • Kenwood TH-255A | User Manual - Page 85
    SPECIFICATIONS Note: All specifications are guaranteed within the amateur radio band. Specifications are subject to change without notice due to advancements in technology. General Frequency range K type TX M type 144 ~ 148 MHz 136 ~ 174 MHz RX 136 ~ 174 MHz Mode F3E Antenna impedance
  • Kenwood TH-255A | User Manual - Page 86
    Transmitter RF output power (approx.) High: 5.5 W Low: 0.5 W Modulation Reactance modulation Maximum frequency deviation Within ±5 kHz Spurious emission Modulation distortion (300 Hz ~ 3 kHz) Less than -60 dB Less than 3 % 78
  • Kenwood TH-255A | User Manual - Page 87
    Receiver Circuit type Intermediate Frequency (IF) Sensitivity (12 dB SINAD) Double super heterodyne 1st IF: 38.85 MHz 2nd IF: 450 kHz Less than 0.18 µV Squelch sensitivity Less than 0.13 µV Selectivity -6 dB -40 dB More than 10 kHz Less than 28 kHz Audio output (10 % distortion) More than
  • Kenwood TH-255A | User Manual - Page 88
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INSTRUCTION MANUAL
© B62-1981-00 (K, M)
09 08 07 06 05 04 03 02 01 00
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