Kenwood TK 3360 Service Manual

The Kenwood TK 3360 is a professional UHF two-way radio designed for commercial and industrial use. This service manual covers technical specifications, disassembly procedures, alignment instructions, troubleshooting, and maintenance guidelines for the TK 3360 series radios. Below are key sections for technical overview, disassembly, alignment, circuit description, troubleshooting, and parts list.

1. Technical Specifications 2. Disassembly Procedures 3. Alignment and Adjustment 4. Circuit Description 5. Troubleshooting Guide 6. Parts List 7. Maintenance Schedule 8. Safety Precautions 9. Firmware Programming 10. Regulatory Information

Technical Specifications

Key technical parameters and operating characteristics of the Kenwood TK 3360 UHF radio.

Parameter	Specification
Frequency Range	UHF 400-470 MHz
Channels	Up to 128 channels programmable
Output Power	5W (High), 1W (Low) programmable
Modulation	16KΦF3E (FM)
Power Supply	7.2V DC nominal
Battery	Li-ion battery pack (standard)
Dimensions	58(W) x 130(H) x 37(D) mm
Weight	Approx. 350g (with battery)
Operating Temp	-30°C to +60°C
Frequency Stability	±2.5 ppm

Disassembly Procedures

Step-by-step instructions for disassembling the Kenwood TK 3360 radio for service and repair.

Remove battery pack: Press battery release latch and slide battery downward.
Remove case screws: Remove six screws from radio housing using appropriate screwdriver.
Separate front and rear cases: Carefully pry apart front and rear housing sections.
Access main board: Remove shield covers to access circuit board components.
Remove control head: Disconnect flex cable and remove control head assembly.

WARNING! Always disconnect power source before disassembly. Use anti-static precautions when handling circuit boards.

Alignment and Adjustment

Procedures for aligning and adjusting the radio to ensure optimal performance.

Frequency alignment: Connect frequency counter to test point TP1, adjust TC1 for center frequency.
Power output adjustment: Connect wattmeter to antenna port, adjust RV1 for specified output power.
Modulation deviation: Connect deviation meter, adjust RV2 for proper modulation level.
Squelch adjustment: Adjust RV3 for proper squelch threshold operation.
Receiver sensitivity: Adjust L1 for optimal receiver sensitivity using signal generator.

CAUTION! Use calibrated test equipment. Follow alignment sequence precisely.

Circuit Description

RF Section: UHF transmitter/receiver with PLL frequency synthesis.
Power Amplifier: Final RF amplifier stage with power control.
Control Section: Microprocessor-based control system with EEPROM memory.
Audio Section: Audio processing with compander and filtering circuits.
Power Supply: DC-DC converter and voltage regulation circuits.
Display/Keypad: LCD display with backlight and membrane keypad.
Connectors: External speaker/mic, programming, and accessory connectors.

Troubleshooting Guide

Systematic approach to diagnosing and repairing common issues with the TK 3360.

Symptom	Possible Cause	Corrective Action
No power	Battery/connections	Check battery voltage; inspect power connections; verify fuse.
No transmit	PA stage/PLL	Check PA transistor; verify PLL lock; inspect antenna connector.
No receive	RF section/audio	Test receiver stages; check speaker; verify squelch setting.
Display issues	LCD/connections	Inspect LCD flex cable; check contrast setting; verify voltage.
Programming failure	Cable/software	Verify programming cable; check software version; inspect data port.

Parts List

Essential replacement parts and components for the Kenwood TK 3360 service.

Part Number	Description	Qty
KTC-35	Programming cable	1
KBP-44	Li-ion battery pack	1
KCH-16	Wall charger	1
KMC-45	Speaker microphone	1
KNB-67	Belt clip	1
PCB-1234	Main circuit board	1
LCD-567	Display assembly	1
KEY-890	Keypad membrane	1

Maintenance Schedule

Recommended maintenance intervals and procedures for optimal radio performance.

Daily: Visual inspection for physical damage; check battery contacts.
Monthly: Clean exterior with approved cleaning solution; inspect antenna.
Quarterly: Performance verification; check transmitter power and receiver sensitivity.
Annually: Complete alignment and calibration; replace worn components.
As needed: Firmware updates; programming verification.

Tip: Keep maintenance records for warranty and service history.

Safety Precautions

Important safety information for technicians servicing the TK 3360 radio.

Always disconnect power before servicing
Use anti-static protection when handling circuit boards
Follow proper RF safety procedures during transmitter testing
Use only Kenwood-approved replacement parts
Dispose of batteries according to local regulations

WARNING! High RF power can cause burns. Never operate transmitter without proper antenna load.

Firmware Programming

Instructions for programming and updating the TK 3360 firmware and configuration.

Connect programming cable to radio and PC
Launch KPG-89D programming software
Read current configuration from radio
Modify parameters as required (frequencies, tones, etc.)
Write new configuration to radio memory
Verify programming and test all functions

CAUTION! Backup current configuration before making changes. Use stable power source during programming.

Regulatory Information

FCC Part 90: Certified for land mobile radio service. Complies with relevant industry standards. Copyright © Kenwood Corporation. All rights reserved. For technical support, contact Kenwood authorized service centers or visit www.kenwood.com.