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Kenwood TL-120 User Manual

Kenwood TL-120
21 pages
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Kenwood TL-120 Specifications

General IconGeneral
BrandKenwood
ModelTL-120
CategoryAmplifier
LanguageEnglish

Summary

FEATURES

CIRCUIT DESCRIPTION: ALC

ALC Circuit Operation

Monitors output wave level and controls output power.

CIRCUIT DESCRIPTION: PROTECTION

Power Reduction Circuits

Protects against mis-matched loads and voltage drops by reducing amplifier power.

Thermal Fan and Band Setting Protection

Fan control by temperature and protection against incorrect band settings.

CIRCUIT DESCRIPTION: MEASUREMENT & OVERHEAT

Collector Current Measurement and Overheat Protection

Terminals for measuring collector current and overheat protection circuits.

SEMICONDUCTOR DATA

SRF 1714 Transistor Specifications

Technical specs and maximum ratings for the SRF 1714 power amplifier transistor.

EXTERNAL VIEWS

Front Panel Layout

Identification of controls and indicators on the front panel.

Rear Panel Connectors

Identification of input/output connectors on the rear panel.

Top View of Internal Components

Identification of major internal assemblies visible from the top.

PC BOARD LAYOUTS

PA Unit PC Board

Schematic and component layout for the Power Amplifier unit.

Filter Unit PC Board

Schematic and component layout for the Filter unit.

PC BOARD LAYOUTS

LED PC Board Layout

Schematic and component layout for the LED PC Board.

Control Unit PC Board

Schematic and component layout for the Control unit.

PARTS LIST

Resistor and Capacitor Details

Information on resistor types, wattage, value, tolerance, and capacitor types/values.

Capacitor Value Coding

Explanation of how capacitor values are coded and examples.

PARTS LIST

General and PA Unit Parts

List of general parts and detailed breakdown for the PA Unit.

PARTS LIST

Filter and Control Unit Parts

Detailed list of parts for the Filter and Control Units.

PACKING AND DISASSEMBLY

Packing Contents

List of items included in the product packaging.

Unit Case Disassembly

Diagram illustrating the removal of the unit's outer casing.

DISASSEMBLY PROCEDURES

Front Panel and PC Board Disassembly

Exploded view showing front panel and PC board mounting disassembly.

DISASSEMBLY PROCEDURES

Rear Panel and PA Unit Disassembly

Exploded views for rear panel and PA unit component disassembly.

TROUBLESHOOTING

Power, Voltage, and ALC Issues

Steps to diagnose and resolve problems with power supply, voltage, and ALC settings.

Fan and Protection Troubleshooting

Steps for troubleshooting inoperative fans and protection circuit activation.

ADJUSTMENTS

Equipment, Connection, and Settings

Required equipment, connection steps, and initial settings for adjustments.

9V Converter and Base Current Adjustment

Procedures for adjusting the 9V DC-DC converter and base current.

ADJUSTMENTS

PC Board Alignment Procedures

Alignment steps for the Control, Filter, and PA Unit PC boards.

ALC and Protection Adjustment

Procedures for adjusting the ALC circuit and protection functions.

REFERENCE DATA

Output Power vs. Input Level Graph

Graph showing output power as a function of input signal level.

Output Characteristic Curves Graph

Graph showing output power and efficiency across carrier frequencies.

SCHEMATIC DIAGRAMS

PA, Filter, and Control Unit Schematics

Complete schematic diagrams for the PA, Filter, and Control units.

REFERENCE DATA

Spurious Response (Harmonics) Graphs

Graphs illustrating spurious response (harmonics) at various frequencies and powers.

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