LG CJ45 Service Manual

SERVICE MANUAL
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.
“Any reproduction, duplication, distribution (including by way of email, facsimile or other
electronic means), publication, modification, copying or transmission of this Service Manual is
STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics
entity from which you received this Service Manual. The material covered by this prohibition includes,
without limitation, any text, graphics or logos in this Service Manual.”
Copyright © 2017 LG Electronics Inc. All right reserved.
Only for training and service purposes.
CONFIDENTIAL
MODEL: CJ45 (CJ45, CJS45F/W)
Mini Hi-Fi System
MODEL: CJ45
(CJ45, CJS45F/W)
P/NO : AFN77612178 FEBRUARY, 2017
jomi

LG CJ45 Specifications

General

Total Power Output	720W
Bluetooth	Yes
USB Playback	Yes
CD Player	Yes
FM Radio	Yes
Equalizer	Yes
Brand	LG
Model	CJ45
Category	Stereo System
Channels	2.0
Optical Input	No
AUX Input	Yes
Functions	CD, USB, FM, Bluetooth
Audio Inputs	USB

Summary

Section 1: Summary

Servicing Precautions

Guidelines for safe handling and servicing of the unit's components.

CD Player Repair Handling Notes

ESD Precautions

Procedures to protect components from electrostatic discharge damage.

Section 2: Cabinet & Main Chassis

Exploded Views

Case Top Disassembly

Steps to remove the top cover of the unit.

Panel Rear Disassembly

Steps to remove the rear panel of the unit.

Main & SMPS Board Removal

Steps to remove the main and SMPS circuit boards.

Main & SMPS PCB Removal

Steps to remove the main and SMPS printed circuit boards.

Panel PCB & Multi Knob Removal

Steps to remove the front panel PCB and multi-knob.

SMPS Bracket Removal

MD Module Removal

Section 3: Electrical

One-Point Repair Guide

Troubleshooting guide for common electrical issues.

Electrical Troubleshooting Guide

Detailed troubleshooting procedures for electrical faults.