Sharp LC-24LE150 Schematic

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SERVICE MANUAL

No.S53M2024LE150M

LED BACKLIGHT TV

MODEL : LC-24LE150M

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY

PRECAUTION................................................i

PRECAUTION FOR USING LEAD-FREE

SOLDER.........................................................ii

CHAPTER 1. OUTLINE

[1] OUTLINE...........................................1-1

CHAPTER 2. SPECIFICATIONS

[1] SPECIFICATION.................................2-1

CHAPTER 3.OPERATION MANUAL

[1] OPERATION MANUAL........................3-1

CHAPTER 4. DIMENSIONS

[1] DIMENSIONS......................................4-1

CHAPTER 5. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS...........5-1

CHAPTER 6. ADJUSTMENT

[1] ADJUSTMENT....................................6-1

CHAPTER 7. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE .........................7-1

CHAPTER 8. OVERALL WIRING/BLOCK DIAGRAM

[1] SYSTEM BLOCK DIAGRAM............................8-1

CHAPTER 9. PRINTED WIRING BOARD ASSEMBLIES

[1] Main Unit .............................................9-1

[2] LED RC Unit ........................................9-5

[3] POWER Unit........................................9-7

CHAPTER 10. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC

DIAGRAM ...........................................10-1

[2] MAIN Unit ...........................................10-2

[3] LED RC Unit .......................................10-4

[4] POWER Unit ......................................10-6

Parts Guide

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-24LE150M

SAFETY PRECAUTION

SAFETY PRECAUTIONSAFETY PRECAUTIONSAFETY PR ECAUTIONSAFETY PRECAUTIONSAFETY P RECAUTIONSAFETY PRECAUTION



LC32LE240M

IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow:

5GTXKEG/CPWCN

WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

BEFORE RETURNING THE RECEIVER (Fire &

All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.)

Any reading of 0.74 Vrms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

Shock Hazard)

Before returning the receiver to the user, perform the following safety checks:

3. Inspect all lead dr ess to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.

4. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor netw orks, mechanical insulators, etc.

5. To be sure that no shock hazard exists, check for leakage current in the following manner.

• Plug the AC cord directly into a 110-240 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15 F capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

TO EXPOSED METAL PARTS

DVM

AC SCALE

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

SAFETY NOTICE

Many electrical and mechanical parts in LCD colour television have special safety-related characteristics.

These characteristics are often not evident from visual inspection, nor can pr otection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features

are identified by " " and shaded areas in the Replacement Parts List and Schematic Diagrams.

For continued protection, replacement parts must be identical to those used in the original circuit.

The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

LC-24LE150M

PRECAUTIONS FOR USING LEAD-FREE SOLDER

Employing lead-free solder

• “PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

Example:

Indicates lead-free solder of tin, silver and copper. Indicates lead-free solder of tin, silver and copper.

Using lead-free wire solder

• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

Soldering

• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 C which is higher than the conventional lead solder by 40 C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required.

If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.

When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

• Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

PARTS CODE

ZHNDAi123250E BL J 0.3mm 250g (1roll) ZHNDAi126500E BK J 0.6mm 500g (1roll) ZHNDAi12801KE BM J 1.0mm 1kg (1roll)

PRICE RANK

PART

DELIVERY

DESCRIPTION

LC-24LE150M

CHAPTER 1. OUTLINE

[1] OUTLINE

MAJOR SERVICE PARTS

PWB

Ref No. Part No .

N DKEYMG260FM02

N DUNTKG255FM02

N DUNTKG265FM02

OTHER UNI

Ref No. Part No .

N RLCDTA249WJN1

ĞƐĐƌŝƉƟŽŶ

MAIN hŶŝƚ

POWER hŶŝƚ

LED RC hŶŝƚ

ĞƐĐƌŝƉƟŽŶ

24" LCD WĂŶĞů hŶŝƚ

1 – 1

CHAPTER 2. SPECIFICATIONS

Speciﬁcations

LC-24LE150M

Item

LCD panel

Resolution

Video Colour System PAL/SECAM/NTSC 3.58/NTSC 4.43

TV Function

Audio ampliﬁer/Speakers

Terminals Antenna input

Power Requirement AC 110—240 V, 50/60 Hz

Power Consumption 36 W (0.8 W Standby)

Dimensions

TV-Standard PAL: B/G, D/K, I SECAM: B/G, D/K, K/K

Receiving Channel

TV-Tuning System Auto Preset 99 ch

STEREO/BILINGUAL NICAM: B/G, I, D/K A2 stereo: B/G

INPUT 1 HDMI (HDMI input), PC input

INPUT 2 VIDEO in, AUDIO in, COMPONENT in

INPUT 3 VIDEO in, AUDIO in

OUTPUT AUDIO out, Headphone (

Model

VHF/UHF 43.25—863.25 MHz

CATV

without stand

with stand

LC-24LE150M

23.5o (598 mm) TFT LCD

1,049,088 pixels (1366 g 768)

S1—S41ch (including Hyperband)

º671:Vº671:HselgnagniweiV

5 Wg 2 / 3 g 8 cm 2pcs

UHF/VHF 75 q DIN type

3.5 mm stereo)

Vietnamese/Indonesian

561 (W) g 358 (H) g 50 (D) mm

561 (W) g 391 (H) g 178 (D) mm

561 (W)

423 (H)

178 (D) mm ( For Vietnam only )

NTSC: M

/iahT/naisreP/naissuR/eseugutroP/hcnerF/cibarA/esenihCdeﬁilpmiS/hsilgnEegaugnalDSO

)dnatshtiw(gk6.5/)dnatstuohtiw(gk2.5thgieW

Operating Temperature 0°C — 40°C

s As a part of policy of continuous improvement, SHARP reserves the right to make design and speciﬁcation changes for

product improvement without prior notice. The performance speciﬁcation ﬁgures indicated are nominal values of production units. There may be some deviations from these values in individual units.

2 – 1

LC-24LE150M

CHAPTER 3. OPERATION MANUAL

[1] OPERATION MANUAL

Part names

TV (Front)

Remote control sensor

POWER indicator

Light off Power off. Lighted (Red) The TV is in standby mode. Lighted (Green) The TV is on.

TV (Rear)

SERVICE ONLY

SERVICEONLY

1 POWER (On/Off) button 2 MENU button 3 INPUT button 4 Channel up (r)/down ( 5 Volume up (e)/down (f) buttons 6 SERVICE ONLY terminal* 7 INPUT 1 (HDMI) terminal 8 SERVICE ONLY terminal* 9 INPUT 3 terminals 10

/AUDIO output (R/L) terminal

11 Antenna input terminal 12 INPUT 2 (COMPONENT/AV INPUT)

terminals

) buttons

* Usually do not connect anything to this terminal as it is reserved only for service personnel.

s The illustrations in this operation manual are for explanation purposes and may vary slightly from the actual operations.

3 – 1

Remote control unit

LC-24LE150M

7 VOLk/VOL

1 2

SURROUND TIMER

Set the volume. (VOLk) Increase the volume. (VOLl) Decrease the volume.

8e (Mute)

e s

Press

Mutes sound.

Presse again s Restores sound.

6 7

14 15

WIDE

Mute will be cancelled after 30 minutes. However, the TV will not suddenly output loud sound as the volume level will be set to 0 automatically. Increase the volume level by pressing VOLk.

9a/b/c/d (Cursor)

Select a desired item on the setting screen.

ENTER

Execute a command.

10 WIDE

Change the wide image mode.

11 ECO

Reduce overall power consumption based on user

LCDTV

GB095WJSA

preferences.

12 TIMER

Set the Sleep timer and Reminder.

1 POWER (STANDBY/ON)

To switch the power on and off.

2 DISPLAY

Display the channel or input information.

3 SURROUND

Select surround setting.

4 0 – 9

Set the channel.

5A (Flashback)

PressA to return to the previous selected channel or external input mode.

6 AV MODE

Select an audio and video setting.

13 INPUT (INPUT SOURCE)

Select an input source.

14 CHr/CH

TV input mode: Select the channel. (CHr) Increase the channel number.

) Decrease the channel number.

(CH

15 MPX

Select the sound multiplex mode.

16 MENU

Display the menu screen.

17 RETURN

MENU mode: Return to the previous menu screen.

3 – 2

LC-24LE150M

Attaching the stand

s Before attaching (or detaching) the stand, unplug the AC cord from the AC outlet. s Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from

being damaged.

Conﬁrm the screws supplied with the TV.

Screws (

(used in step 1 and 3)

Insert and hook post into stand base slot holes.

(1) Fix the post using short screw.

Insert the stand base to the stand post on the

bottom of the TV. (

Insert and tighten the 3 screws into the 3 holes

on the bottom of the stand base. (

NOTE

s To detach the stand, perform the steps in reverse order. s Do not attach or detach the stand without holding it. Doing

so can cause the stand to fall, resulting in serious personal injuries as well as damage to the stand.

)

Soft cushion

Screw

Screw driver

3 – 3

CHAPTER 4. DIMENSIONS

[1] DIMENSIONS

LC-24LE150M

[mm]

4 – 1

LC-24LE150M

CHAPTER 5. REMOVING OF MAJOR

PARTS

[1] REMOVING OF MAJOR PARTS

1.Removing of the Rear Cabinet Ass'y and Stand Base

1 .Remove the 3 screws and detach the Stand Base

2 .Remove the 9 screws and detach the rear cabinet ass'y

5 – 1

2.Removing of the Bottom Bracket & speaker L/R

and PWB Chassis

LC-24LE150M

1 .Remove the 2 screws and detach the bottom bracket

2 .Disconnect SP wayer & remove speaker from L/R panel bosses

3 .Disconnect LED BL FFC CABLE and disconnect LED /IR WIRE

4 .Disconnect PD wayer and remove 4 screw for remove power board

5. Disconnect LVDS FFC wayer and remove 3 screw

for remove main unit

5 – 2

LC-24LE150M

3.Removing of LCD Panel Unit

1 .Hook out the 9 lock

2.Remove 4 screw

from cab A.

and detech KS Tray Chassis

5 – 3

CHAPTER 6. ADJUSTMENT

–

[1] ADJUSTMENT

[1]

ADJUSTMENT PROCE DURE

Entering

1) While holding down the inspec-

2) Press the Channel DOWN and Volume DOWN keys at the same time. (The

3) To cancel it, turn off the power using the Power switch or remote

Remote controller

1. key

and

cancel the adjustment process mode

tion process mode is

operation

INPUT

and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K” standing for

displayed

key

on the upper left position of the

operation

screen.)

adjustment

control.

and

description of display in adjustment process mode.

process mode screen

LC-24LE150M

appears.)

Remote controller key

CH ( / VOL (+ / Cursor ( /

Cursor ( /

INPUT button on controller ENTER —————— ——————

* Input mode is switched

Software

1) Plug off the LCD

2) Insert the USB device to the USB terminal at the LCD

(Make sure that the latest software is installed in the USB

3) Hold the LCD TV power key and plug on the LCD

4) LCD TV is on and detecting the USB

5) A few seconds later, LED light (orange) will blink indicating the software

7) T V w i l l a u t o m a t i c a l l y r e s t a r t w h e n s oftware is successfully installed

8) LCD TV is running with the latest software.

LCD TV

1. EDID DATA

–)

)

remote

upgradin

TV.

CH ( /

—————— ——————

INPUT

automatically

ADJUSTMENT ITEM

INPUT

Main

/+(LOV

–)

button

when relevant

device.

unit key

)

TV.

adjustment

TV.

device).

Changing

(TVÆ INPUT1 Æ INPUT2 Æ INPUT3

is started so far as the

selected line

selected line setting

egapagninruT

a selected line setting

(UP/DOWN)

(PREVIOUS/NEXT)

necessary

upgrading.

unc

(+1/-1)

(+10/-10)

elggot(gnihctiwsecruostupnI

switching)

)

input signal is

tion

available.

No need to input

2. SIGNAL

A. PICTURE

Confirmation of signal f rom generat or (setting to spec

15K Component signal ( 50Hz)  Y le vel  0.7Vp- p

33K Compone nt signal  Ylevel  0.7V p-p

EDID

ADJUSTMENT

level)

Pb, Pr level  0.7Vp-p : 0.7Vp-p

Pb, Pr level  0.7V p-p0.7Vp-p

p-pV7.0langisetisopmoCLAP

0.02Vp-p (pedestal to white

0.02Vp -p

0.02Vp -Com

–

level)

6 – 1

LC-24LE150M

a) Adjustment

1 Adjustment Mode P ress the test key at the test remote control

b) Component 33K 60Hz Signal Adjustment (COMP-HD)

1Setting [Signal]

2 Auto Adjustment

Mode

ITEM CONDITION PROCEDURE



COMP 3 3K 60Hz (1080i) 100% F ull-fi eld Bar

[Terminal] COMPONEN T INPUT 2

Test Mode page 5 (COMP HD)

Colour

Feed the COMPONENT 33K 60Hz (1080i) 100% Full-field Col our B ar si gnal( 100% c olour s aturat ion) to COMPONENT INP UT 2

100% Whit e

At the related page, move cursor to [COMP HD ADJ], press ENTER.

[OK] appears when finished.



Black

6 – 2

NO.

WHITE BALANCE ADJUSTMENT

a) Whi te Bal ance Adjustm ent

ITEM CONDITION PROCEDURE

LC-24LE150M

i Setting Backlight : MAX

AV Mode : DYNAMIC Active Backlight : OFF

Set the luminance meter on the centre of the screen

ii Auto

Initial setting Panel Contrast

Adjustment

[command] Adjustment

Mode

KRSW0001

KKT10037

Setting KYOF0001 OSDS0001 SBSL0016

Multi point adj. Mode

MSET0000

WBI20255

Point 2

WBI20204

MG2G**** MG2B**** MG2R****

Point 1

WBI10051

MG1G**** MG1B**** MG1R****

Write

MSET0003

Set

Max.Level MGMG**** MGMR**** MGMB****

(1) Measurement MAX Brightness (2) Set MIN Brightness (3) Measurement HIGH Brightness (4) Measurement LOW Brightness

(5) Calculation H Ȗ (6) Calculation LȖ

(7) Calculation HIGH luminance (Ȗ=2.2)

(8) Calculation Initial setting of R/G/B_HIGH

(9) Set Initial setting of R/G/B_HIGH

(10) Original WB adjustment is performed (HIGH)

Set the specified gradation for point 2, fix the most faint colour to get reference value, adjust others 2 colours to minus adjustment for reference value of point 2.

(11) Measurement HIGH Brightness

(Set) R_HIGH= G_HIGH

(12) Calculation MAX luminance after WB

(13) Set

(14) Calculation LOW luminance (Ȗ=2.2)

(15) Calculation Initial setting of R/G/B_LOW

(16) Set Initial setting of R/G/B_LOW

(17) Original WB adjustment is performed (LOW).

Set the specified gradation for point 1. Set G of point 1 to the default value [(R1 x G value of point 2/R2), with fractions rounded] and adjust RB to the reference value of point 1.

For the details of white balance adjustment procedure, please refer to white balance adjustment spec for Kameyama model.

1. Confirm the set condition.

2. Connect the white balance jig.

3. Through RS-232C command, adjustment mode screen is displayed.

R/G/B_MAX R/G/B_HIGH R/G/B_LOW

G_HIGH= G_HIGH B_HIGH= G_HIGH

ADJ set to Ȗ=2.2 (L

R/G/B_MAX

XHG

= 3000:1

MAX

=4080

= 3664/4080

= 816/4080

max

=305.7 cd/m²

L L

min=Lmax/Cnt

=235.1 cd/m²

L L

=2.06 cd/m²

HȖ=LOG((L LȖ =LOG((L

H22

=(L

max-Lmin

=WB

MAX

R_HIGH=WB G_HIGH=WB B_HIGH=WB

Example: G6 panel also use for G8/ CSOT, CMI (be careful of INT setting)

= 0.102

-L

min

)/(L

-L

min

) /(L

)x(WBH/WB

X ((L

H22

’=3703

max-Lmin

MAX

-L

min

)/(L

))/LOG(WBH/WB

))/LOG(WBL/WB

)^2.2+L

max-Lmin

MAX

)= 2.44

MAX

)=2.73

min

=241.31

))^(1/H Ȗ)=3703

R_HIGH=3702 G_HIGH=3641 B_HIGH=3703

RESULT

R_HIGH=3641

XHG=

G_HIGH=3641

231.3

B_HIGH=3641

XMX=LXHG

/((WBH/WB

MAX

)^2.2)=293.04

)

R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078 G_MAX=WB

max-Lmin

))^(1/HȖ)=4010

MAX

X ((L

XMX

-L

min

)/(L

B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078

XLX

=(L

XMX

-L

min

L WB

=WB

MAX

R_LOW=WB G_LOW=WB B_LOW=WB

)x(WBL/WB

X ((L

XLX

=901

XLX

=901

XLX

=901

XLX

MAX

)^2.2+L

min

-L

min

)/(L

max-Lmin

=5.08

))^(1/LȖ)=901

RESULT

R_LOW= 921 G_LOW=901 B_LOW=971

(18) Adjusted value is writing at [command]

MSET0003

6 – 3

LC-24LE150M

(19) Set the G of point Max. to the default value

(4080 x G value of point 2 / R2). Set the R,B Max. value [G

– G value of point 2 + (R,B

max

value of point 2)

(20) Calculate the slope R2

between MAX and Point2. R2 (R

max-Rhigh

)/(4080-3664)

slope,G2slope,B2slope

slope =

(21) Calculate the correction value پR

پG

high,پBhigh.

high =R2slope X

(3840-3664)

Set the reference value R,G,B of point 2

(22)

(R2’)=R2+پR

(23)

Calculate the slope R1

high

slope,G1slope,

B1 between Point2 and Point1. R1 (R

high-Rlow

(24)

Calculate the correction value پR پG

low,پBlow.

)/(3664-816)

low,

low =R1slope X

(915-816)

(25)

Set the reference value R,G,B of point 1 (R1’)=R1+پR

(26) Shut down the AC power.

䯲

Initial value at RGB 2 point : 3664

䯲

Initial value at RGB 1 point : 816

[Adjustment value]

侀

Teaching set send by engineering dept is set as

reference.

low

high,

slope

slope =

[Reference values for adjustment reference] Equipment : Luminance meter [Minolta CA-210]

Point 2 ref.

values

Point 1 ref.

values

Level

229

Spec Data

x=0.272 y=0.277

Adjustment

Spec.

0.0010 0.0020

0.0045 0.0090

Inspection

Spec.

Ref. : For inspection, set the LCD TV as below.

AV MODE : [DYNAMIC] (Reset)

Aging Time : Minimum 5 minutes

6 – 4

FACTORY SETTING

powerisplug

Caution:

Do not

Factory setting

Do not

off

ITEM CONDITION PROCEDURE

off

after shipment setting

plugonagain after shipment setting

with rem ote

power

factory

control.

setting.

off t o

exit the

done.

If do,

please r e-do

Settingisdone with test remote control.

Press

the

When Green background appears

disappears, setting

The followings

‘Factory Setting’ key

completed.

are

User setting

Channel data (e.g. broadcast frequencies)

Manufacturer’s option

Password data

Setting values

initialisedtofactory

are set

the

ship ment sett ing.

on the

remote control continuously.

screen and

setting

setti ngs

basedonmodel destination

‘K’

mark

LC-24LE150M

Model Name Factory Setting Key

A3KLE1VVZ/J/I/Y/B/N/M

A3KLE1VVP

M-Setting 100000001010110 B/G ENGLISH

P-Setting 100000001011110 M ENGLISH

Name

Remote Control Code S-System Setting OSD Language

**Please do inspection for A3KLE1VVP using NTSC signal.

Setting

6 – 5

+ 37 hidden pages