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LG CJ65 Service Manual

LG CJ65
65 pages
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SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
Internal Use Only
MARCH, 2017
MODEL: CJ65 (CJ65, CJS65F)
MODEL: CJ65
(CJ65, CJS65F)
Mini Hi-Fi System
P/NO : AFN77612196

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LG CJ65 Specifications

General IconGeneral
TypeHome audio mini system
Cassette deckNo
Product colorBlack, Red
Disc loading typeFront
Optical disc playerYes
Number of optical discs1 discs
ColorationMonochromatic
RMS rated power- W
Number of speakers-
Peak Music Power Output (PMPO)900 W
Equalizer bands quantity7
Power sourceAC
Power consumption (standby)0.5 W
Power consumption (typical)115 W
Supported radio bandsFM
Preset stations quantity50
USB 2.0 ports quantity2
Playback modesRepeat
Disc types supportedCD-R, CD-RW
Playback disc formatsCD audio
Audio formats supportedMP3, WMA
Weight and Dimensions IconWeight and Dimensions
Rear speaker depth230 mm
Rear speaker height363 mm
Main unit dimensions (WxDxH)350 x 251 x 163 mm

Summary

Section 1 - Summary

Servicing Precautions

Guidelines for safe handling, transport, storage, and repair of the pick-up module.

ESD Precautions

Procedures to prevent damage from electrostatic discharge to sensitive components.

Hidden Key Mode

Instructions and descriptions for accessing and using hidden key modes for diagnostics.

Service Information for EEPROM

Steps for accessing and modifying EEPROM settings for service purposes.

Program Download Guide

Procedure for downloading and updating the device firmware via USB.

FOTA Update Step Using BT App

Step-by-step guide for updating device firmware wirelessly using a Bluetooth app.

Specifications

Technical specifications for the LG Mini Hi-Fi System, including power, inputs, and dimensions.

Section 2 - Cabinet & Main Chassis

Exploded Views

Visual diagrams showing the breakdown of the main chassis and cabinet components.

Packing Accessory Section

Details and diagrams of the packing materials and accessories included with the product.

Speaker Section

Information related to the front speaker unit and its components.

Disassembly Instructions

Step-by-step instructions for disassembling the unit's main chassis parts.

Section 3 - Electrical

One Point Repair Guide

Troubleshooting guide for common "no power" issues, including component checks.

Electrical Troubleshooting Guide

Comprehensive troubleshooting flowcharts for various electrical faults and symptoms.

Waveforms of Major Check Point

Visual examples of oscilloscope waveforms for key signal points during troubleshooting.

Wiring Diagram

Diagram illustrating the electrical connections and wiring paths within the system.

Block Diagrams

High-level block diagrams showing the functional units and their interconnections.

Circuit Voltage Chart

Table detailing expected voltage levels for ICs, connectors, and capacitors.

Printed Circuit Board Diagrams

Diagrams showing the layout of components on the SMPS, Main, Front, and MIC PCBs.

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