Sharp LC-19SK24U User Manual

In the interests of user-safety (Required by safety regulations in some countries) the set should be re-
stored to its original condition and only parts identical to those specified should be used.
MODEL
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LCD COLOR TELEVISION
CONTENTS
ﾈ
IMPORTANT SERVICE SAFETY PRECAUTION ..........................................................................................2
ﾈ
SPECIFICATIONS .........................................................................................................................................5
ﾈ
OPERATION MANUAL ..................................................................................................................................7
ﾈ
DIMENSIONS ..............................................................................................................................................11
ﾈ
REMOVING OF MAJOR PARTS .................................................................................................................13
ﾈ
ADJUSTING PROCEDURE OF EACH SECTION ......................................................................................18
ﾈ
PUBLIC MODE SETTING PROCEDURE ...................................................................................................43
ﾈ
TROUBLESHOOTING TABLE .....................................................................................................................48
ﾈ
MAJOR IC INFORMATIONS .......................................................................................................................56
ﾈ
BLOCK DIAGRAM .......................................................................................................................................58
ﾈ
OVERALL WIRING DIAGRAM ....................................................................................................................60
ﾈ
DESCRIPTION OF SCHEMATIC DIAGRAM ..............................................................................................62
ﾈ
SCHEMATIC DIAGRAM
RC/LED Unit ..............................................................................................................................................63
MAIN Unit ..................................................................................................................................................64
SUB Unit ....................................................................................................................................................82
POWER_INVERTER Unit ..........................................................................................................................86
KEY Unit ....................................................................................................................................................88
ﾈ
PRINTED WIRING BOARD ASSEMBLIES .................................................................................................89
ﾈ
REPLACEMENT PARTS LIST ...................................................................................................................109
ﾈ
PACKING OF THE SET .............................................................................................................................126
Page
N87B1LC19K24U
LC-19SK24U
LC-19SK24U-W
LC-19SB24U
LC-19SB24U-W
LC-19SB14U
LC-19D44U
19K24U P1-17.indd 1 2007-9-4 10:06:54

Sharp LC-19SK24U Specifications

General

Screen Size	19 inches
Display Type	LCD
Aspect Ratio	16:9
Brightness	300 cd/m²
HDMI Ports	1
USB Ports	1
Backlight Type	CCFL
Refresh Rate	60 Hz
Sound Output	5W x 2
Power Consumption	45W
Resolution	1366 x 768 pixels
Inputs	HDMI, Composite, Component, RF

Summary

Important Service Safety Precautions

General Safety Warnings

Provides warnings on circuit modification and power disconnection before servicing.

Leakage Current Test Procedure

Details the procedure to check for shock hazards via leakage current.

Product Specifications

Basic Adjustment Settings

Removing Major Parts

Adjusting Procedures

PWB/IC Replacement Notes

Notes for PWB/IC replacement, including software and equipment requirements.

Software Writers and Converters

Details on specific software writers and converters for adjustment procedures.

Microprocessor Software Upgrades

Sub Microprocessor Software Upgrade

Procedure for upgrading the sub microprocessor software version.

Main Microprocessor Software Upgrade

Instructions for upgrading the main microprocessor software.

Adjustment Procedures

Calling the Adjustment Process Mode

Explains how to activate the adjustment process mode.

Key Operation in Adjustment Process

Details the key operations for navigating the adjustment process.

AD Transform Level Adjustment

Temperature Adjustment

White Balance and Factory Settings

Public Mode Setting Procedure

Starting Public Mode

On-Screen Setting Items

Troubleshooting Table - No Power

Troubleshooting Table - No Audio (UHF/VHF)

Troubleshooting Table - No Audio (External Input)

Troubleshooting Table - No Video (INPUT-1)

Troubleshooting Table - No Video (INPUT2)

Troubleshooting Table - No Video (Analog Broadcast)

Troubleshooting Table - No Video (HDMI Input)

Troubleshooting Table - No Video (PC Input)

Major IC Information

Block Diagram

Overall Wiring Diagram

Schematic Diagrams

Main Unit Schematic (1/9)

Sub Unit Schematic (1/2)

Power Inverter Unit Schematic

Parts List - Replacement Items

Printed Wiring Board Assemblies

List of printed wiring board assemblies as replacement items.

LCD Panel Parts

Parts List - Power Inverter Unit

Power Inverter Components

List of integrated circuits, transistors, and diodes for the power inverter unit.

Parts List - Main Unit

Main Unit Components

List of main unit ICs, transistors, diodes, packaged circuits, coils, and capacitors.

Parts List - Sub Unit

Sub Unit Components

List of capacitors and resistors for the sub unit.

Parts List - Sub Unit (Continued)

Sub Unit Special Parts

Parts List - R/C LED Unit

R/C LED Unit Components