Kenwood TK 3140 Manual

The Kenwood TK 3140 is a professional VHF two-way portable radio designed for commercial and industrial use. This compact, rugged radio features 16 channels, 5W output power, MIL-STD 810 C/D/E compliance for durability, programmable functions, built-in scrambler, and multiple signaling options. Below are key sections covering features, installation, operation, programming, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation and Setup 3. Basic Operation 4. Specifications 5. Controls and Functions 6. Programming 7. Battery and Charging 8. Advanced Features 9. Maintenance & Care 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Compact portable radio, LCD display, programmable buttons, antenna, battery pack, belt clip, and charger.

Feature	Description
Frequency Range	VHF 136-174 MHz
Channels	16 programmable channels
Output Power	5W (High), 1W (Low) selectable
Battery	7.4V 1500mAh Li-ion
Display	LCD with channel, battery, and status indicators
Durability	MIL-STD 810 C/D/E compliant
Scrambler	Built-in voice inversion scrambler
Signaling	2-tone, 5-tone, DTMF capabilities
Programming	PC programmable via KPG-46D software
Accessories	Charger, belt clip, earphone/mic options

Installation and Setup

Unpack and inspect contents. Install battery and antenna.

Battery installation: Align battery contacts, slide onto radio until it clicks.
Antenna installation: Screw antenna clockwise onto antenna connector.
Charging: Place radio in charger; charging indicator will light.
Power on: Rotate volume knob clockwise; radio beeps and display lights.

WARNING! Use only Kenwood-approved batteries and chargers. Do not use damaged batteries.

Basic Operation

Power on radio; select channel and adjust volume.

Channel selection: Use channel selector knob or up/down buttons.
Volume control: Rotate volume knob for desired audio level.
Transmit: Press and hold PTT button; speak into microphone.
Receive: Release PTT button to listen.
Monitor: Press monitor button to temporarily disable squelch.

CAUTION! Transmit only when necessary and authorized. Observe proper radio etiquette.

Specifications

Frequency Range: VHF 136-174 MHz
Channels: 16 programmable
Output Power: 5W (High), 1W (Low)
Battery Life: Approx. 10 hours (5-5-90 duty cycle)
Dimensions: 58W × 130H × 37D mm (with standard battery)
Weight: Approx. 420g (with standard battery)
Operating Temp: -30°C to +60°C
IP Rating: IP54 dust and water resistant
Modulation: 16KΦF3E / 11KΦF3E
Antenna Impedance: 50Ω

Controls and Functions

Front Panel: Volume knob, channel selector, PTT button, programmable buttons, LCD display.

Display Indicators: Channel number, battery level, transmit indicator, busy channel, scan status, power level.

Programmable Functions: Scan, power level selection, timeout timer, busy channel lockout, battery save, scrambler, signaling tones.

Programming

Requires KPG-46D programming software and programming cable.

Install KPG-46D software on Windows PC.
Connect programming cable to radio and PC.
Read current data from radio.
Program frequencies, tones, and functions as needed.
Write data to radio and verify operation.

Tip: Backup current programming before making changes. Only qualified personnel should program radios.

Battery and Charging

Standard battery: 7.4V 1500mAh Li-ion.

Charging: Use approved charger; charging time approx. 3 hours.
Battery life: 10 hours typical use (5% transmit, 5% receive, 90% standby).
Battery conditioning: Fully discharge and recharge monthly for optimal performance.
Storage: Store in cool, dry place when not in use.

WARNING! Do not short-circuit battery terminals. Dispose of batteries properly.

Advanced Features

Scanning: Programmable scan with priority channel. Scrambler: Voice inversion for privacy. Signaling: 2-tone, 5-tone, DTMF for selective calling. Timeout Timer: Prevents extended transmissions. Busy Channel Lockout: Prevents transmission on busy channels.

Maintenance & Care

Clean with dry cloth only. Avoid solvents and liquids. Regular inspection of antenna, battery contacts, and case integrity.

CAUTION! Do not disassemble radio. Service by qualified technicians only.

Regulatory Information

FCC Part 90 certified for land mobile radio service. Complies with relevant industry standards. This device may not cause harmful interference and must accept any interference received. For technical support and service, contact authorized Kenwood dealer or visit www.kenwood.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Battery discharged or faulty	Charge battery; check battery contacts; replace if necessary.
No transmission	PTT button or settings	Check PTT function; verify channel programming; check power level.
Poor reception	Antenna or location	Check antenna connection; move to better location; check squelch setting.
Battery drains quickly	Battery age or settings	Replace old battery; check battery save settings; reduce transmit power.
No audio	Volume or speaker	Adjust volume; check external speaker connection; inspect internal speaker.

Reset: Programming reset available through software. Hardware reset not recommended.

Service: Contact authorized Kenwood service center for repairs.