Kenwood TM-V708A instruction manual Troubleshooting, Problem Probable Cause Corrective Action

Page 88

TROUBLESHOOTING

The problems described in this table are commonly encountered operational malfunctions and are usually not caused by circuit failure.

 

Problem

 

Probable Cause

Corrective Action

Page

 

 

Ref.

 

 

 

 

 

 

The transceiver will not power up

1

The power cable was connected

1 Connect the supplied DC power cable

5, 6

 

after connecting a 13.8 V DC

 

backwards.

correctly: Red → ( + ); Black → ( – ).

 

 

power supply and pressing the

2

One or more of the power cable

2 Look for the cause of the blown fuse(s). After

7

 

PWR switch. Nothing appears on

 

fuses are open.

inspecting and correcting any problems, install

 

 

the display.

 

 

a new fuse(s) with the same rating.

 

 

 

 

 

 

 

 

 

3

The modular plug cable was not

3 Correctly connect the modular plug cable

4

 

 

 

connected correctly.

between the front panel and main unit.

 

 

The display is too dim, even

The supply voltage is too low.

The supply voltage requirement is 13.8 V DC

—

 

though you selected a high

 

 

15% (11.7 V to 15.8 V DC). If the input voltage

 

 

dimmer level.

 

 

is outside this range, recharge your battery,

 

 

 

 

 

adjust your regulated power supply, and/or check

 

 

 

 

 

all power cable connections.

 

 

The frequency cannot be selected

Memory Recall was selected.

Press [VFO].

15

 

by turning the Tuning control or

 

 

 

 

 

by pressing Mic [UP]/ [DWN].

 

 

 

 

 

Most keys and the Tuning control

One of the Lock functions is ON.

Unlock all of the Lock functions.

65

 

do not function.

 

 

 

 

 

 

 

 

 

 

Memory channels cannot be

No data has been stored in any

Store data in some memory channels.

34

 

selected by turning the Tuning

memory channels.

 

 

 

control or by pressing Mic [UP]/

 

 

 

 

 

[DWN].

 

 

 

 

 

You cannot transmit even though

1

The microphone plug was not

1 Switch the power OFF, then insert the

8

 

you press Mic [PTT].

 

inserted completely into the front

microphone plug until the locking tab clicks in

 

 

 

 

panel connector.

place.

 

 

 

 

 

 

 

 

2 You selected a transmit offset that

2 Press [F], [SHIFT] repeatedly so neither “+”

27

 

 

 

places the transmit frequency

nor “–” is visible.

 

 

 

 

outside the allowable transmission

 

 

22

 

 

range.

 

 

82

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Contents TM-V708A Features Thank YOUWhen condensation occurs inside the transceiver One or more of the following statements may be applicableContents Selecting the Number of Channels Using Visual Scan Setting Scan Limits Using Program ScanRecalling the Call Channel Reprogramming the Call Channel Locking Out a Memory ChannelPacket Operation Supplied Accessories Conventions Followed in this ManualMain Unit Installation Mobile InstallationPreparation Front Panel Installation Slide the front panel down until its locking tab clicksFixed Station Installation Modular Plug Cable ConnectionDC Power Cable Connection Mobile OperationFixed Station Operation Transceiver 15 a Supplied Accessory 20 a DC Power Cable Antenna ConnectionReplacing Fuses Fuse Location Fuse Current RatingExternal Speakers Accessory ConnectionsMicrophone Your First QSO Ewwew wGetting Acquainted Front Panel3SQL control Main Unit Front Microphone Indicators VFO mode Memory Recall modeProgrammable Memory PM mode Menu modeKEY Function Display Band a & B TX Band and Control BandTX Band Control BandMIC Keypad Direct Entry MC-58DM only Switching the Power ON/OFF Adjusting the VolumeOperating Basics Selecting a BandPress VFO to select VFO mode Adjusting the SquelchSelecting a Frequency When you finish speaking, release Mic PTT Selecting Output PowerTransmitting Menu Setup Menu AccessMenu Configuration Level Selections DefaultAuto PM Channel Store Channel DisplayMemory Channel Lockout Memory channel name See reference Number StoreRemote Control Automatic Power Off APOAcknowledgement Operating Through Repeaters Offset Programming FlowProgramming Offset Selecting Offset DirectionSelecting Offset Frequency Press c / d to select Repeater Then press OKActivating Tone Function Selecting a Tone FrequencyPress Tone to activate the Tone function Press F, T.SELAutomatic Repeater Offset Transmitting a 1750 Hz Tone Press c/ d to select TX Hold 1-7-4, thenReverse Function Press REV to switch the Reverse function on or OFFAutomatic Simplex Check ASC Tone Frequency ID Press Scan to activate the Tone Frequency IDSimplex & Repeater or ODD-SPLIT Memory CHANNEL? Memory ChannelsParameter Simplex Odd-split Press M.IN 1 s Storing ODD-SPLIT Repeater FrequenciesSelect your desired transmit frequency Press M.IN Select band a or B Press MR to enter Memory Recall mode Press MHz Tuning control+ Power onRecalling a Memory Channel Clearing a Memory ChannelTurn the Tuning control to select the first digit Naming a Memory ChannelPress a Repeat steps 5 and 6 to enter up to 8 digitsCall Channel Recalling the Call ChannelReprogramming the Call Channel Press VFOMEMORY-TO-VFO Transfer Channel DisplayPartial or Full RESET? Parameter Band a Band BProgrammable Memory PM Programmable InformationApplication Examples Situationit tiRecalling a PM Channel Storing in PM ChannelsPress F, P.IN Press PM+ Power on PM Channel ResetAuto PM Channel Store Scan Scan Type Scan RangeMode 1 31 ch Mode 2 61 chVisual Scan Selecting the Number of ChannelsPress F, Visual to start Visual Scan Using Visual ScanTo exit Visual Scan, press ESC Time-Operated mode Carrier-Operated modeSeek mode Selecting Scan Resume MethodVFO Scan Memory ScanPress VFO 1 s Select band a or BPress MHz Tuning control 1 s Group ScanLocking Out a Memory Channel To exit Group Scan, press MHz againProgram Scan Setting Scan LimitsSelect your desired frequency for the lower limit Press F Using Program Scan Select the appropriate bandTo exit Program Scan, press VFO again To exit MHz Scan, press MHz againCALL/VFO Scan CALL/MEMORY ScanTo exit Call/VFO Scan, press Call again To exit Call/Memory Scan, press Call againUsing Ctcss Continuous Tone Coded Squelch System CtcssPress the left or right Band SEL to select band a or B Press Tone to activate the Ctcss functionCtcss Frequency ID Press Scan to activate the Ctcss Frequency IDDigital Code Squelch DCS Using DCSPress Tone to activate the DCS function DCS Code ID Press Scan to activate the DCS Code IDDtmf Monitor Manual DialingFreq. Hz 1209 1336 1477 1633 Turn the Tuning control to select a character Automatic DialerStoring a Dtmf Number in Memory Repeat steps 4 and 5 to enter up to 8 digitsSelecting TX Speed Transmitting a Stored Dtmf NumberSelecting Pause Duration Programmable Function PF Keys PF PF1MR PF2 VFO PF3Press VFO Press Mic Enter Auxiliary FunctionsPress the numeric keys in sequence on the keypad Changing Frequency Step Size Programmable VFOPress VFO Press F, Step Press c/ d to select your desired step sizeDisplay Contrast Adjust Display DimmerAuto Dimmer Change POSITIVE/ Negative ReversalBlanking a Band Display Automatic Band Change ABCPWR switch MHz SQL controls VOL controls Press MNU to exit Menu modeTransceiver Lock ALL-CONTROL LockChanging Beep Volume Switching FM/AM ModeKEY Beep ON/ OFF Squelch Hang TimeTIME-OUT Timer TOT Automatic Power OFF APOIntermodulation and Sensitivity Adjustments Advanced Intercept Point AIPPOWER-ON Message Display Demonstration14 4 Press a Repeat steps 3 and 4 to enter up to 8 digitsConnection Mode Band a Band B Changing Speaker ConfigurationsSpeaker Mute Packet Operation Connecting with a TNC and Personal Computer FunctionSelecting a Data Transfer Rate Microphone Control with MC-58DM only KeyWireless Remote Control PreparationControl Operation Access Menu 1-A-3 Control and select onSelect the receive frequency on band B UHF Repeater Function VS-3 Voice Synthesizer Optional Band SELOptional Accessories PS-33 SP-50B VS-3PG-2N PG-3B PG-4X PG-5A MC-45Installing Options Installing the PG-4X Extension Cable KITRemove the 6 screws from the lower cover of the main unit Replace the lower cover 6 screwsConnections Using One PG-4X Kit Connections Using Two PG-4X KitsMaintenance ServiceService Note CleaningTroubleshooting Problem Probable Cause Corrective ActionSpecifications VHF Band UHF BandTransmitter Index

TM-V708A specifications

The Kenwood TM-V708A is a versatile and powerful dual-band transceiver that caters to amateur radio enthusiasts seeking advanced communication capabilities. Designed for operation in the 144 MHz and 440 MHz bands, this mobile radio provides exceptional performance in various modes, making it ideal for both casual users and serious operators alike.

One of the standout features of the TM-V708A is its ability to operate in both VHF and UHF frequencies simultaneous, enabling users to monitor multiple channels at once. With a powerful output of up to 50 watts on VHF and 35 watts on UHF, the TM-V708A ensures strong, clear signals that can reach distant stations. The user-friendly interface includes a large display that provides clear readings of the frequency and other operational parameters, enhancing the overall experience for operators.

The Kenwood TM-V708A is equipped with advanced digital signal processing (DSP) technology. This feature minimizes background noise, ensuring that voice communications remain crystal clear even in challenging conditions. The built-in CTCSS and DCS capabilities add further functionality, allowing for selective calling and improved privacy during conversations.

This transceiver comes with a wide range of operating modes. It supports FM, AM, and SSB, providing flexibility based on operator preference and environmental conditions. Furthermore, the inclusion of APRS (Automatic Packet Reporting System) capabilities allows for real-time tracking and position reporting, making it an excellent tool for emergencies and outdoor adventures.

Another notable characteristic is its built-in memory. The TM-V708A can store a substantial number of memory channels, allowing users to quickly access their preferred frequencies. Additionally, the dual-receive function permits the monitoring of two different frequencies simultaneously, providing seamless communication in dynamic environments.

For enhanced usability, the TM-V708A includes multiple connectivity options. It features a variety of ports for connecting external equipment, allowing operators to customize their setup according to their specific needs. The unit also balances robust performance with portability, making it suitable for both mobile and stationary use.

In summary, the Kenwood TM-V708A is a powerful and feature-rich transceiver that combines advanced technologies and user-friendly design. Its dual-band capabilities, robust power output, and extensive operational modes make it an invaluable tool for amateur radio operators seeking to enhance their communication experience. Whether for casual chatting or emergency response, the TM-V708A stands as a premier choice in the market.
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