LG LF-U850D User Manual

MICRO HI-FI SYSTEM
SERVICE MANUAL
MODEL: LF-U850D, LF-U850A,
LFS-U850
SERVICE MANUAL MODEL: LF-U850D, LF-U850A, LFS-U850
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL.

LG LF-U850D Specifications

General

Brand	LG
Model	LF-U850D
Category	Stereo System
Language	English

Summary

Section 1. General

Servicing Precautions

ESD Precautions

Guidelines for handling Electrostatic Sensitive Devices (ESD) to prevent damage.

Section 2. Electrical Section

Troubleshooting Guide

Step-by-step guide to diagnose and resolve electrical issues.

System Block Diagram

Main Schematic Diagram

The main schematic diagram for the audio system's circuitry.

Front Schematic Diagram

SMPS Schematic Diagram

Schematic diagram for the Switched-Mode Power Supply (SMPS) unit.

CD Part Diagrams

USB Part Diagrams

Wiring Diagrams

Main PC Board Component Layout

Component layout view of the main printed circuit board.

Main PC Board Solder Side

Solder side view of the main printed circuit board.

SMPS PC Board Layout

Component layout view of the SMPS printed circuit board.

Front PC Board Layout

Component layout view of the front panel printed circuit board.

CD PC Board Layouts

Component and solder side layouts for the CD printed circuit board.