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LG HT353SD-A2 - Service Manual

LG HT353SD-A2
81 pages
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MODEL: HT303SU(HT303SU-A2, SH33SU-S/W)/HT353SD(HT353SD-A2, SH33SD-S/W)
SERVICE MANUAL
P/NO : AFN37064402 JANUARY, 2008
DVD/CD RECEIVER
SERVICE MANUAL
MODEL: HT303SU(HT303SU-A2, SH33SU-S/W)
HT353SD(HT353SD-A2, SH33SD-S/W)
Website http://biz.lgservice.com
Internal Use Only
HT303SU
HT353SD

Other manuals for LG HT353SD-A2

Questions and Answers

LG HT353SD-A2 Specifications

General IconGeneral
TypeHome Theater System
Number of Channels5.1
DVD PlaybackYes
HDMI Inputs1
USB PlaybackYes
BluetoothNo
Supported MediaDVD, CD, USB
Audio FormatsDolby Digital, DTS
ConnectivityUSB
Video FormatsMPEG2, DivX
InputsHDMI, USB
OutputsHDMI

Summary

Section 1: General Information

Servicing Precautions

Notes regarding careful handling of the pick-up, including transport, repair, and cleaning procedures.

Compact Disc Player Repair Notes

Precautions for handling components, tools, and the workbench during CD player repairs.

Electrostatic Discharge Precautions

Techniques to reduce component damage caused by static electricity, including handling procedures and precautions.

Cautionary Graphic Symbols

Explanation of graphic symbols used to indicate dangerous voltage and important safety information.

EEPROM Service Information (DVD Part)

Procedure for detecting and updating EEPROM data for DVD part using remote control inputs.

EEPROM Service Information (Amplifier Part)

Procedure for detecting and updating EEPROM data for Amplifier part using remote control inputs.

Software Update Procedures

Instructions for updating Audio MICOM and DVD programs via CD or USB.

Product Specifications

Technical specifications for the DVD/CD Receiver, including power, speakers, and dimensions.

Section 2: Electrical Part

Troubleshooting Guide

Flowchart for diagnosing power supply and playback issues, guiding service personnel through checks.

Front Circuit Troubleshooting (Part 1)

Diagnostic steps for front panel circuits, including LED, Digitron, buttons, and remote control.

Front Circuit Troubleshooting (Part 2)

Continued diagnostic steps for front panel circuits, focusing on power and MICOM connections.

System Operation Flowchart

Diagram illustrating the sequence of operations from power on to disc loading and playback.

System Test and Debug Flow (Part 1)

Flowchart for testing power PCB, DC outputs, FLASH updates, and related circuits.

System Test and Debug Flow (Part 2)

Continues system test flow, checking Flash Memory, SDRAM, video outputs, and tray control signals.

System Test and Debug Flow (Part 3)

Continues system test flow, checking SLED movement, motor drivers, and focus signals.

System Test and Debug Flow (Part 4)

Continues system test flow, checking laser operation, disc ID, spindle rotation, and RF signals.

System Test and Debug Flow (Part 5)

Continues system test flow, checking focus, tracking, and disc playback signals.

System Test and Debug Flow (Part 6)

Final steps in system test flow, checking audio output and PWM IC status.

Amplifier Protection Circuit

Troubleshooting steps for "PROTECTION" message on the FLD, checking IC and transistor status.

Audio Micro-Com Circuit Diagnosis

Flowchart for diagnosing audio and MICOM circuit issues, checking various inputs and IC status.

System Test Waveform Details

Details and waveforms for system test signals, including 27MHz clock and reset signals.

SDRAM Clock Waveforms

Waveforms and details for SDRAM clock and Flash R/W enable signals during download.

Tray Open;Close Signal Waveforms

Waveforms illustrating tray open and close signals, with associated circuit diagrams.

Sled Control Signal Waveforms

Waveforms for SLED control signals under no-disc conditions, with related IC pinouts.

Lens Control Signal Waveforms

Waveforms for lens control signals under no-disc conditions, with related IC pinouts.

Disc Type Judgement Waveforms

Waveforms for judging disc type (DVD and CD), with associated circuit diagrams.

Disc Type Judgement Waveforms (CD)

Waveforms illustrating disc type judgement for CD playback.

Focus Signal Waveforms

Waveforms showing focus signals during DVD and CD playback, with related IC pinouts.

Spindle Control Waveforms

Waveforms for spindle control signals under no-disc conditions, with related IC pinouts.

MT1389;L Video Output Waveforms

Waveforms for MT1389/L video output signals, including composite and Y signals.

MT1389;L Audio Output Signals

Waveforms for audio output signals from the MT1389/L chip, including related signals.

DVD and Amplifier Waveforms

Waveforms for DVD and amplifier circuits, showing signal transitions between specific points.

IC Block Diagrams and Pin Configuration

Block diagram and pin configuration for IC501 (MT1389L).

IC501 Block Diagram

Detailed block diagram of the MT1389L MPEG chip, showing its main functional blocks.

IC501 Pin Descriptions

Detailed pin descriptions for IC501 (MT1389L), explaining each pin's function and interface.

IC501 Pin Descriptions (Part 2)

Continued pin descriptions for IC501, covering pins 100 onwards, including audio DAC and GPIO functions.

IC501 Pin Descriptions (Part 3)

Continued pin descriptions for IC501, covering DRAM interface and microcontroller pins.

IC501 Pin Descriptions (Part 4)

Continued pin descriptions for IC501, covering DRAM addresses, GPIO, and control signals.

IC501 Pin Descriptions (Part 5)

Continued pin descriptions for IC501, covering GPIO, SPDIF, and other interface pins.

IC401 Motor Driver Details

Pin configuration and block diagram for the IC401 motor driver.

IC401 Motor Driver Pin Descriptions

Detailed pin descriptions for IC401, explaining its functions for focus, sled, tray, spindle, and tracking drivers.

IC101 Microcomputer Pin Configuration

Pin configuration for the IC101 Microcomputer (MICOM).

IC101 Microcomputer Block Diagram

Block diagram of the IC101 Microcomputer, showing its internal modules and interfaces.

IC101 Microcomputer Pin Descriptions

Pin descriptions for IC101, covering power supply, Port 0, Port 1, and Port 2 functions.

IC101 Microcomputer Pin Descriptions (Part 2)

Continued pin descriptions for IC101, covering Port 7, Port 8, Port 3, Port C, and reset/crystal pins.

IC201 ADC (CS5345) Pin Configuration

Pin configuration for the IC201 ADC (CS5345).

IC201 ADC Block Diagram

Block diagram of the IC201 ADC (CS5345), showing its analog inputs and digital interfaces.

IC201 ADC Pin Descriptions

Detailed pin descriptions for IC201 ADC, covering serial control, analog inputs, and digital grounds.

IC704 PWM Pin Configuration

Pin configuration for the IC704 PWM chip.

IC704 PWM Pin Descriptions

Pin descriptions for IC704 PWM, covering power, PCM, and PWM audio outputs.

IC704 PWM Pin Descriptions (Part 2)

Continued pin descriptions for IC704 PWM, covering system control interfaces and test modes.

IC704 PWM Pin Descriptions (Part 3)

Continued pin descriptions for IC704 PWM, covering special control interfaces and test modes.

Wiring Diagram

Diagram showing the main PCB, SMPS PCB, Front PCB, and Mic&USB PCB connections.

Overall System Block Diagram

High-level block diagram of the entire system, showing major components and their interconnections.

Circuit Diagrams

SMPS (Power) circuit diagram, detailing the power supply components and layout.

MPEG Circuit Diagram

Circuit diagram for the MPEG section, showing connections to IC501 (MT1389L) and other components.

Servo Circuit Diagram

Circuit diagram for the servo section, detailing motor drivers and pickup connections.

MICOM Circuit Diagram

Circuit diagram for the MICOM section, showing connections to IC101 and other peripheral interfaces.

I;O Circuit Diagram

Circuit diagram for the I/O section, including SCART, RCA, and tuner interfaces.

Amplifier Circuit Diagram

Circuit diagram for the amplifier section, showing PWM modulation and audio output stages.

Microphone Circuit Diagram

Circuit diagram for the microphone input section.

Front Circuit Diagram

Circuit diagram for the front panel, including display, volume control, and buttons.

Power Key Circuit Diagram

Circuit diagram for the power key and standby LED.

MIC, USB, and PTB Circuit Diagram

Circuit diagram for MIC, USB, and PTB connections, including optional configurations.

Printed Circuit Board Diagrams

Top view diagram of the main PCB.

Main PCB Bottom View Diagram

Bottom view diagram of the main PCB.

SMPS PCB Diagram

Diagram of the SMPS (Switch Mode Power Supply) PCB.

Timer PCB Diagrams

PCB diagrams for the Timer board for HT303 and HT353.

Section 3: Exploded Views

Exploded View: Cabinet and Main Frame

Exploded view showing the main chassis, front panel, and internal components assembly.

Exploded View: Deck Mechanism (DP-12 TV)

Exploded view of the deck mechanism, with a parts list and specifications.

Packing Accessory Contents

Diagram illustrating the packing accessories included with the unit.

Speaker Assembly (SH33 SU)

Exploded view and parts list for the SH33SU satellite speakers.

Speaker Assembly (SH33 SD-S)

Exploded view and parts list for the SH33SD-S satellite speakers.

Passive Subwoofer Assembly

Exploded view of the passive subwoofer, showing its components.

Section 4: Mechanism (DP-12 TV)

Deck Mechanism Parts Locations

Overview of deck mechanism parts locations, with references to specific pages for details.

Deck Mechanism Parts Locations (Top View)

Detailed listing of deck mechanism parts and their fixing types, organized by view.

Deck Mechanism Disassembly Procedures

Step-by-step instructions for disassembling the main base and tray disc.

Base Assembly Sled and Related Parts

Disassembly steps for the base assembly sled, gear feed, gear middle, gear rack, and rubber rear.

Frame Assembly, Belt Loading, and Gear Procedures

Disassembly and reassembly steps for frame assembly, belt loading, gear pulley, gear loading, and guide.

Deck Mechanism Exploded View

Comprehensive exploded view of the deck mechanism, illustrating all sub-assemblies and parts.

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