Aiwa LCX-137 User Manual

SERVICE MANUAL
DATA
COMPACT DISC STEREO
SYSTEM
LCX-137
S/M Code No. 09-003-340-2R1
LH(S) K(S) EZ(S)
REVISION
This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No. 09-003-340-2T1).
BASIC TAPE MECHANISM : TN-21ZSC-2003
BASIC CD MECHANISM : DA11T3C

Aiwa LCX-137 Specifications

General

Brand	Aiwa
Model	LCX-137
Category	Stereo System
Tuner Bands	AM/FM
CD Player	Yes
Cassette Deck	Yes
Radio Tuner	Yes
Remote Control	Yes
Type	Mini
Speakers	2

Summary

System Specifications

LH Model Specifications

Detailed specifications for the LH model unit, covering tuner, amplifier, and deck functions.

EZ, K Models Specifications

Detailed specifications for the EZ and K models, covering tuner, amplifier, and deck features.

Safety Precautions

Laser Beam Safety During Servicing

Critical warnings and distance guidelines for laser beam exposure during servicing procedures.

Optical Block Replacement Precautions

Precautions for replacing the optical block, including ESD prevention and grounding.

Electrical Main Parts List

Transistors, Diodes, Capacitors, and Resistors

Lists discrete electronic components such as transistors, diodes, capacitors, and resistors with part numbers.

Chip Resistor Coding System

Explanation of the coding system for chip resistors, including wattage, type, tolerance, and dimensions.

LEDs, ICs, Switches, Connectors, and Motors

Lists LEDs, integrated circuits, switches, connectors, and motors with their respective part numbers.

Circuit Board Components (CD, AC)

Lists components specific to the CD and AC circuit boards, including connectors and passive components.

Schematic Diagram 1 (Main LH, K, EZ Part 1/2)

Main CB Schematic (LH, K, EZ - Part 1)

Circuit diagram for the main control board (Part 1), showing connections and component layouts.

AC CB Schematic (Part 2/2)

Circuit diagram for the AC control board (Part 2), illustrating power supply and related circuits.

Integrated Circuit Block Diagrams

IC M62495FP Block Diagram

Block diagram illustrating the internal structure and pin functions of the M62495FP IC.

IC LA6541D Block Diagram

Block diagram detailing the internal structure and pin functions of the LA6541D IC.

IC LA1837NL Block Diagram

Block diagram showing the internal structure and pin functions of the LA1837NL IC.

IC LC72131 Block Diagram

Block diagram illustrating the internal structure and pin functions of the LC72131 IC.

Schematic Diagram 2 (Main LH Part 2/2)

Main CB Schematic (LH - Part 2)

Circuit diagram for the main control board (Part 2), detailing tuner, IF, and stereo decoding circuits.

Schematic Diagram 3 (Main K, EZ Part 2/2)

Main CB Schematic (K, EZ - Part 2)

Circuit diagram for the main control board (Part 2), detailing tuner, IF, and stereo decoding circuits for K/EZ models.