LG LH-CX640 Series User Manual

DVD/VCR COMBI RECEIVER
Combi
Receiver
System
SERVICE
MANUAL
MODELS
:
LH-CX245(LH-CX245X)/LH-CX246(LH-CX246X)
LH-CX247(LH-CX247X)/LH-CX640(LH-CX640X)
CAUTION
BEFORE SERVICING
THE
UNIT,
READ THE
\"SAFETY PRECAUTIONS\"
IN
THIS MANUAL.
LH-CX640(LH-CX640X)LH-CX245(LH-CX245X)
LH-CX247(LH-CX247X)
LH-CX246(LH-CX246X)
PROG./
PRESET
PROG.

LG LH-CX640 Series Specifications

General

Type	DVD player
Playable File Format	MP3, WMA, JPEG
Progressive Scan	Yes
Video Upconversion	1080p
Playable Media Format	CD
Supported Media	DVD-R/RW
Video Output	HDMI
Surround Sound	Dolby Digital
Outputs	Component, Composite

Summary

SECTION 1 SUMMARY

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

Essential guidelines for safe servicing of video products, covering electrical safety and precautions.

SERVICING PRECAUTIONS

General service precautions, including handling of sensitive devices and insulation testing procedures.

SPECIFICATIONS

Detailed technical specifications for the unit across various sections like DVD, VCR, tuner, and amplifier.

SECTION 2 CABINET & MAIN CHASSIS

EXPLODED VIEWS

Visual representation of the unit's components for identification and assembly reference.

Woofer Speaker Section (LHS-CX245W/LHS-CX247W)

Exploded view and part list for the woofer speaker assembly, specific to certain models.

Satellite & Center Speaker Section (LHS-CX245T/LHS-CX247T)

Exploded view and part list for satellite and center speaker assemblies, specific to certain models.

Packing Accessory Section

Illustrates and lists the packing materials and accessories included with the product.

SECTION 3 ELECTRICAL

ELECTRICAL ADJUSTMENT PROCEDURES

Step-by-step procedures for adjusting the VCR deck mechanism, including servo and head alignment.

ELECTRICAL TROUBLESHOOTING GUIDE (VCR Part)

Flowcharts for diagnosing and resolving electrical issues within the VCR section of the unit.

ELECTRICAL TROUBLESHOOTING GUIDE (DVD Part)

Flowcharts for diagnosing and resolving electrical issues within the DVD section of the unit.

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING

Explanations and oscilloscope waveforms for system tests, covering critical signals and timing for debugging.

SECTION 4 MECHANISM OF VCR PART (D-37)

POSITION DRAWING OF DECK MECHANISM PARTS

Diagrams illustrating the location and assembly sequence of VCR deck mechanism components.

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

Detailed instructions for disassembling and reassembling various parts of the VCR deck mechanism.

DECK MECHANISM ADJUSTMENT

Procedures and required tools for adjusting the VCR deck mechanism, including torque and head alignment.

MECHANISM TROUBLESHOOTING GUIDE (1.Deck Mechanism)

Troubleshooting flowcharts for common issues related to the VCR deck mechanism's operation.

SECTION 5 MECHANISM OF DVD PART

DECK MECHANISM PARTS LOCATION

Diagrams showing the location of DVD deck mechanism parts and their corresponding disassembly procedures.

DECK MECHANISM DISASSEMBLY

Step-by-step instructions for disassembling the DVD deck mechanism, covering parts like the holder clamp and tray disc.

EXPLODED VIEWS (1. Deck Mechanism Exploded View)

A comprehensive exploded view of the DVD deck mechanism, useful for parts identification.