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Kenwood LS-M31 User Manual

Kenwood LS-M31
42 pages
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JK602
(HM-381MD)
MICRO HiFi COMPONENT SYSTEM
RXD-M31MD/
LS-M31
(
M
)
SERVICE MANUAL
© 1999-12/B51-5555-00 (K/K) 1853
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock
defeated.
AVOID DIRECT EXPOSURE TO BEAM
* Refer to parts list on page 42.
In compliance with Federal Regulations, following are repro-
ductions of labels on, or inside the product relating to laser
product safety.
Front cabinet
(A60-1745-08)
Top panel
(A21-3801-08)
Knob (MD EJECT)
(K29-7702-08)
Knob (VOLUME)
(K29-7690-08)
Control panel *
(A21-)
Knob (ON/STANDBY)
(K29-7700-08)
Cass door cover
(A02-2945-08)
Headphone jack
(E11-0398-08)
MD door
(A52-0376-08)
Knob (TAPE/STOP)
(K29-7699-08)
Knob (MD/CD PLAY)
(K29-7698-08)
Knob (PANEL BUTTON)
(K29-7701-08)
Knob (MENU)
(K29-7692-08)
Knob (TAPE REC)
(K29-7691-08)
Knob
(SET DEMO)
(K29-7694-08)
Knob (REPEAT)
(K29-7693-08)
Display lens
(B12-0386-08)
Cass door lens
(B10-3524-08)
Tuning panel
(A21-3779-08)
Knob (MD REC)
(K29-7696-08)
Knob (SOUND)
(K29-7697-08)
Knob (FF/TUNER/AUX)
(K29-7695-08)
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Kenwood LS-M31 Specifications

General IconGeneral
TypeMini Stereo System
Configuration2.0 Channel
CD PlayerYes
Radio TunerAM/FM
InputsAuxiliary Input
OutputsHeadphone Jack

Summary

Cautions and Precautions

Transportation and Handling Precautions

Procedures for safely moving the unit and its components.

Microcomputer Reset Procedure

Steps to reset the microcomputer to its factory default state.

External View and Connections

Rear Panel Connectivity

Detailed layout of rear panel input/output terminals and connectors.

System Block Diagram

Overall System Architecture

A high-level overview of how different modules connect and function within the system.

Circuit Description: Initialization and Tuning

Initialization Procedures

System and mechanism initialization steps, backup data handling.

Tuner and Microprocessor Details

Tuner settings, destination lists, and main microprocessor description.

Circuit Description: Microprocessor and MD Section

Main Microprocessor Pinout

Detailed explanation of the pins for the main microprocessor M30622MA-198FP.

MD Section Overview and Pins

Description of MD section composition, microprocessor pins, and test mode initiation.

Circuit Description: Test Modes

Deck and MD Player Test Modes

Procedures and operations for testing the cassette deck and MD player.

MD Player Specific Test Modes

Specific inspection and adjustment modes for the MD player.

Circuit Description: CD Player Test and MD Errors

CD Player Test Mode

Setting and operation for the CD player test mode.

MD Mechanism Error Messages

Explains various error codes and their meanings for the MD mechanism.

Adjustment Procedures

Tuner and CD Player Adjustments

Steps for adjusting the tuner and CD player sections.

Cassette Deck and PC Board Adjustments

Procedures for adjusting the cassette deck and PC board components.

Waveform Analysis: Playback

Playback Mode Waveforms

Oscilloscope waveforms during PIT PLAY and GROOVE PLAY.

Standby and Operation Waveforms

Waveforms observed during POWER OFF/STANDBY and POWER ON states.

Waveform Analysis: Digital and Conversion

Digital Signal Waveforms

Waveforms for digital signals like LRCK, DADATA, BCLK, DFCK.

Conversion Signal Waveforms

Waveforms for D/A CONV. PLAY and A/D CONV. ANALOG RECORD.

PCB Layout: MD Main Board (Top View)

MD Main PWB-A Component Placement

Component side view layout of the MD Main PWB-A.

PCB Layout: MD Main Board (Bottom View)

MD Main PWB-A Bottom View Components

Bottom side view layout of the MD Main PWB-A.

PCB Layout: Control and Display Units

Control and Display Unit PCBs

Component placement diagrams for the Control Unit and Display Unit PCBs.

PCB Layout: Cassette Deck and Power Units

Cassette Deck and Power Unit PCBs

Component layouts for the Cassette Deck and Power Unit PCBs.

PCB Layout: Power and Motor Units

Power Unit and Motor Board PCBs

Component layouts for the Power Unit and Main Unit Motor Board.

PCB Layout: Main Unit

Main Unit PCB Component Placement

Detailed component layout for the Main Unit PCB.

Schematic Diagrams: Mechanism

Mechanism SW PWB and Motor PWB Schematics

Circuit diagrams for the MD Mechanism SW PWB and Motor PWB.

Schematic Diagrams: MD Mechanism Core

MDM-98A Mechanism Schematic

Detailed schematic for the MDM-98A MD mechanism.

Schematic Diagrams: Main Board

Main Board Tuner and RDS Schematics

Circuit details for the main board, including tuner and RDS sections.

Schematic Diagrams: Control and Interfaces

Control Unit and System Interface Schematics

Circuit diagrams for the control unit and system interfaces.

Schematic Diagrams: Cassette Board

Cassette Board Circuit Details

Circuit schematic for the cassette board.

Schematic Diagrams: Power and Motor

Power Unit and Motor Board Schematics

Circuit diagrams for the power unit and motor control boards.

Exploded View: MD Mechanism

MD Mechanism Parts Breakdown

Illustrated breakdown of the MD mechanism with part numbers.

Exploded View: Cassette Deck Mechanism

Cassette Deck Mechanism Parts Breakdown

Illustrated breakdown of the cassette deck mechanism with part numbers.

Exploded View: Unit Assemblies

Unit Components Exploded View

Illustrated breakdown of various unit components.

Parts List: Mechanical and Electrical Components

Mechanical Parts List

List of mechanical parts including covers, panels, gears, and screws.

Electrical Parts List (Part 1)

List of electrical components like LEDs, knobs, and cables.

Parts List: Electrical Components (Part 2)

Capacitors List

Detailed list of capacitors used in the unit.

Connectors, Diodes, and Transistors

List of connectors, diodes, and transistors.

Parts List: Electrical Components (Part 3)

Capacitors List (Continued)

Further listing of capacitors, including various types and voltage ratings.

Parts List: Electrical Components (Part 4)

Fuses and Resistors List

List of fuses and resistors, including their specifications.

Parts List: Resistors (Part 1)

Resistor List (R605A-R745A)

Comprehensive list of resistors R605A through R745A.

Parts List: Resistors (Part 2)

Resistor List (R747A-R879A)

Continued listing of resistors R747A through R879A.

Parts List: Resistors (Part 3) and Diodes

Resistor List (R881A-R1033A)

Final part of the resistor list, R881A to R1033A.

Diodes and Semiconductors

List of diodes, transistors, and voltage regulators.

Parts List: Semiconductors and ICs

Transistors and ICs (Part 1)

List of transistors and integrated circuits used in the unit.

MD Mechanism Components

Specific parts list for the MD mechanism.

Parts List: Capacitors and Connectors

Capacitors and Resistors (Part 1)

List of capacitors C1400-C1716 and resistors R1100-R1223.

Connectors and Resistors (Part 2)

List of connectors CN1101-CN1501 and resistors R1224-R1411.

Exploded View: MD Mechanism

MD Mechanism Assembly Breakdown

Detailed exploded view of the MD mechanism.

Exploded View: Unit Assemblies

Unit Components Exploded View

Illustrated breakdown of unit assemblies like CD Mechanism and Speaker system.

Specifications

Amplifier and Tuner Specifications

Technical specifications for amplifier output power, frequency response, and tuner ranges.

Recorder, Player, Deck, and General Specs

Specifications for recorder, player, cassette deck, and general system details.

Manufacturer Information

Kenwood Corporation Contact Details

Contact information and addresses for Kenwood Corporation and its service centers.

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