EasyManua.ls Logo

Kenwood TM-271E User Manual

Kenwood TM-271E
46 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
© 2003-10 PRINTED IN JAPAN
B51-8663-00
(
N
)
743
VHF FM TRANSCEIVER
TM-271A/271E
SERVICE MANUAL
CIRCUIT DESCRIPTION ............................ 2
SEMICONDUCTOR DATA ........................ 8
COMPONENTS DESCRIPTION ................ 9
PARTS LIST ............................................. 10
EXPLODED VIEW.................................... 17
PACKING ................................................. 18
RESETTING THE TRANSCEIVER ........... 19
ADJUSTMENT ........................................ 20
TERMINAL FUNCTION ........................... 27
PC BOARD
DISPLAY UNIT (X54-3450-10) ............ 28
TX-RX UNIT (X57-685X-XX)............... 30
SCHEMATIC DIAGRAM.......................... 34
BLOCK DIAGRAM ................................... 38
LEVEL DIAGRAM .................................... 40
SPECIFICATION ................... BACK COVER
CONTENTS
Microphone
(T91-0624-05)
Cabinet
(A01-2193-01)
Panel assy
(A62-1088-03)
Knob (Encoder)
(K29-9293-03)
Knob (Volume)
(K29-9292-03)
Key top
(K29-9291-01)
Microphone
(T91-0641-05)
Cabinet
(A01-2193-01)
Panel assy
(A62-1088-03)
Knob (Encoder)
(K29-9293-03)
Knob (Volume)
(K29-9292-03)
Key top
(K29-9291-01)
TM-271A (M2,M4)
TM-271A/E (K,M3,E)
Question and Answer IconNeed help?

Do you have a question about the Kenwood TM-271E and is the answer not in the manual?

Kenwood TM-271E Specifications

General IconGeneral
BrandKenwood
ModelTM-271E
CategoryTransceiver
LanguageEnglish

Summary

Circuit Description

Frequency Configuration

Details the receiver's double conversion frequency setup.

Receiver System Overview

Explains the superheterodyne receiver signal path and filtering.

Wide/Narrow Switching Circuit

Describes the circuit for selecting wide or narrow filters.

Squelch Circuit Operation

Explains how the squelch circuit detects and controls signal muting.

AF Signal System Path

Outlines the audio signal processing chain from IF to speaker output.

PLL Frequency Synthesizer

Details the PLL circuit for generating local oscillator and RF signals.

Unlock Circuit Function

Describes the circuit that monitors PLL lock status during transmission.

Transmitter System Outline

Provides an overview of the transmitter signal generation and amplification.

Control Circuitry

Explains the CPU's role in controlling various transceiver functions.

Power Supply Circuit

Details the power management and protection circuits for the transceiver.

Data Terminal Interface

Describes the functions of the data terminal for communications.

Semiconductor Data

Microprocessor Terminal Functions

Lists the pin assignments and functions of the main CPU IC101.

Parts List

Exploded View

Packing

Resetting the Transceiver

Initial Settings Overview

Describes the factory default frequencies and settings.

Full Reset Procedure

Details methods for resetting all parameters to factory defaults.

VFO Reset Procedure

Explains how to reset VFO parameters while retaining memory data.

Adjustment

Items for Adjustment

Lists parameters configurable via panel keys in adjustment mode.

Panel Key Operation Method

Explains how to navigate and change values using panel keys.

Test Equipment Required

Lists necessary test equipment for performing alignments.

Adjustment Location Points

Identifies specific points on PCBs for adjustment procedures.

PCB Section Adjustments

Details specific adjustment steps for the PCB sections.

Transmitter Section Adjustments

Outlines adjustments for transmit power, deviation, and balance.

Receiver Section Adjustments

Describes adjustments for squelch, tuning, and signal levels.

Terminal Function

PC Board

Schematic Diagram

Block Diagram

Level Diagram

Specifications

General Specifications

Covers frequency range, mode, power, and physical characteristics.

Receiver Specifications

Details receiver sensitivity, selectivity, and audio output.

Transmitter Specifications

Lists transmitter power output, deviation, and distortion.

Related product manuals