Beko 23WL46G, 30WL46G Schematic

23WL46G 30WL46G

L6B TFT- LCD TV

SERVICE MANUAL

CONTENTS

PAGES

Safety instructions

Technical specifications

Panel Specification

Back appearance of TV

Interconnectıon Diagram

Block diagram

Block diagram of power supply

Service mode

Service Mode items and values

Data sheet of important IC’s and parts

Recommended Part List

Frequency list of channels

SAFETY PRECAUTIONS

GENERAL GUIDELINES

1. It is advised to insert an isolation transformer in the

AC supply before servicing a hot chassis.

2. Always use the manufacturer’s replacement safety

components. The critical safety components marked

with on the schematics diagrams should not be by other substitutes. Other substitute may create the electrical shock , fire or other hazards. Take attention to replace the spacers with the originals. Furthermore where a short circuit has occurred , replace those components that indicate evidence of overheating.

3. After servicing , see that all the protective devices

such as insulation barriers, insulation papers, shields and isolation R-C combinations are correctly installed.

4. When the receiver is not being used for a long time

of period of time , unplug the power cord of the Adaptor from the AC outlet.

Color TFT LCD Module is very sensitive both electrically and physically.Users, therefore, are requested to follow the “Guidance of handling color TFT LCD Module”on the followings.

1 -

Be careful not to make scratch on the

polarizer.

Surface of polarizer is soft and can be physically damaged easily.Please do not touch, push or rub polarizer surface with materials over HB hardness.

2 - Keep clean the surface.

Please wear rubber glove when touch the surface of LCD screen. Please use soft and anti-static material as cleaner.

3 -Keep out of water.Water on/in the LCD may

cause electrical short or corrosion. Please wipe out dry or water carefully

4 -Prevent swift Temperature & Humidity

change.Instantaneous temperature and/or humidity

change can make dew or ice which cause nonconformance such as malfunction.

5 - High temperature & high reduce the life-time.

LCD is not proper to be used at high temperature and high humidity. Please keep specified temperature and humidity condition.

6 - Keep out of Corrosive Gas.Corrosive gas effect the polarizer and the circuit chemically and cause defects accordingly.

humidity

There are electro-static sensitive components such as CMOS in LCD Module. Please earth human body when handle the LCD.In addition, please do not touch the interface connector pin with bare.

8 - Do not operate for a long time under the same pattern

Operating LCD for a long time under the same pattern can cause image persistence and can damage it. Please follow following guidance.

1. Turn the power off when do not use.

2. Change the pattern periodically.

LEAKAGE CURRENT COLD CHECK

Unplug the AC cord and connect a jumper

between the two prongs of the plug.

2. Turn the receiver’s power switch.

3. Measure the resistance value with an ohmmeter,

between the jumpered AC plug and each exposed metallic cabinet part on the receiver. When the exposed metallic part a return path to the chassis the reading should be between 4Mohm and the 20Mohm. When the exposed metal does not have a return path to the chassis, the reading must be infinite.

LEAKAGE CURRENT HOT CHECK

Plug the AC cord directly in to the AC outlet. Do not use an isolation transformer for this check.

2. Connect a 2Kohm 10W resistor in series with an

exposed metallic part on the receiver and an earth, such as a water pipe.

3. Use an AC voltmeter with high impedance to

measure the potential across the resistor.

4. Check each exposed metallic part and check the

voltage at the each point.

5. Reverse the AC plug at the outlet and repeat each of

the above measurements.

6. The potential at the any point should not exceed 1.4

Vrms. In case a measurement is outside the limits specified , there is the possibility of a shock hazard , and the receiver should be repaired and rechecked before it is returned to the customer.

HOT CHECK CIRCUIT

TO INSTRUMENTS

EXPOSED

METALLIC PARTS

AC-Voltmeter

Water pipe (earth)

2 K Ohm

7 - Electrostatic discharge can make

Damage

L6B TECHNICAL SPECIFICATION

Receiving System PAL B/G+I+D/K SECAM L/L'

Comb Filter Adaptive 4H\2H

LTI, CTI Filters +

DVI 1.0 Compliant +

DVI Receiver

Gamma Correction 8 to 10-bit LUT

PIP\PAP\POP\PAT +

OSD Graphics Based 8-bit\pixel

Teletext

WSS +

VPS\PDC +

Picture Formats (4:3, 16:9, 14:9, Panorama, LetterBox, Subtitle)

WSS (Wide Screen Signalling) +

ATS (Automatic Tuning System) Frequency Search

Manual Search Channel Table Search

Number of Program Storage +

No Ident Timer +

Picture Freeze +

Equalizer +

AVL (Automatic Volume Level) +

Sound Status Memory +

Picture Status Memory +

Swap +

Child Lock +

Program Lock +

Picture Format Switching Tru Pin 8 +

Auto RGB Detect Tru Pin 16 +

Timer

Picture Smart (User, Soft, Natural, Rich) +

Sound Smart (User, Music, Sports, Cinema, Speech)

Scart2 Out Selectable +

S-Video Input Through Scart2 +

Audio Output Power RMS in Max at 10% THD)

Stereo (German A2, Nicam, BTSC) German A2, Nicam

S-video In (DIN) 1

AV In (3 RCA) 1

AV Out (3 RCA) 1

PC Audio (L, R) 1

D-Sub 15 1

Headphone 1

CVBS In 4

Y\C In 1

DVI In YES

CVBS Out 4

Resolution VGA to SXGA

2 Pixel \ Clk Support +

Level (1.5, 2.5, Teleweb) Teletext 1.5

Type (Fast\Top\Simple) Simple, Fast, Top

Page Memory 800p

4:3 +

16:9 +

14:9 +

Panorama +

Letterbox +

Subtitle +

Zoom +

Off Timer (Sleep Timer) +

On Timer +

2x5W for 22"W, 23"W

2x10W for 26"W 2x10W for 30"W

PANEL SPECIFICATION

Sizes 22" 23" 26" 27" 30" 32"

Manufacturer Samsung

Interface

Resolution

Brightness (cd/m2)>=

Contrast>=

Response Time (Tr+Tf) msec =<

Viewing Angle R\L\H\L>=

Adaptor İnput

PoweR consumptions

St-By Power Consumption

Single LVDS Single LVDS Singlel LVDS Singel LVDS Single LVDS Single LVDS

WXGA (1280x720) WXGA (1280x768) WXGA (1280x768) WXGA (1280x720) WXGA (1280x768) WXGA (1280x768)

85/85 85/85 85/85 85/85 85/85/85/85 85/85/85/85 85/85/85/85 85/85/85/85

100W 100W 120W 120W 140W 180W

Samsung LG Philips Hannstar

450 450 450 550 550 450

500 400 400 600 600 700

25 25 25 25 25 23

15V 24V Built-in TV Built-in TV Built-in TV Built-in TV

<4W <4W <4W <4W <4W <4W

Samsung LGPhilips AUO

Chimei

Chimei AUO LG-Philips

Input Range

100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz 100V-240V/50- 60Hz

BACK SIDE APPEARANCES

CONTROL

BOARD

SPEAKERS

POWER

SWITCH

LED/IR BOARD

MAIN

CHASSIS

220VAC INPUT

POWER SUPPLY

BOARD

NOTE: LOCATION AND THE SHAPE OF IR /LED BAORD, CONTROL BOARD AND MAIN SWITCH

BOARD MAY CHANGE ACCORDING TO THE COSMETIC OF THE TV AND SIZE

TO PANEL

MAIN CHASSIS

SPEAKER

PANEL

S50

S150

S350

JP451JP452

S550

JP453

JP450

CN1

POWER

SUPPLY

MODULE

CN2CN3

IR RECEIVER/LED

MODULE

TO HEADPHONE JACK

KEY BOARD

MODULE

MAIN POWER

SWITCH

MODULE

220V AC

INPUT

L6B BLOCK DIAGRAM

RF In

AV-Out Video

AV4 Video-In

AV4

Audio-In

Tuner-Main

Tuner-PIP

SCART 1 2 3

Audio-In/Out

Audio-Switch

TDA6420

IF IC TDA9886T

Video In/Out

I2C Communication

SC1-SC2 RGB

Audio

In-Out

PIP-Video

Main-Video

Video Switch

TDA6415C

Pin 8 Switch

PCF8591

RGB Switch

PI5V30

AUDIO PROCESSOR

MSP3410D

QSS-Main

QSS-PIP

Video-Main

Video-PIP

Scart RGB

Multi Standard

Video Decoder

SAA7118MP

Multi Standard

Video Decoder

16 Bit

YUV

SAA7118MP

MT48LC16M

De-Interlacer

24 Bit RGB

16 Bit

YUV

IR In

SDRAM

PW1231

PROCESSOR

De-Interlacer

Micro-Cont.

Gamma Corr.

EEPROM

24C64

PW181 IMAGE

Scaler

OSD

48 Bit RGB VS/HS

Flash Memory

AM29VL160

Progressive

or Intrelaced

24 Bit Dual

RGB ,HS,VS

DE,PCLK

DS090C385

LVDS Transmitter

Stand by

LED’s Reset

Mute B/L Enable Digital Dim

TO THE

PANEL

AV Out Audio

Headphone Jack

Headphone

Amp.

TDA1308

PC DVI Audio -In

Audio Amplifier

TA2024

Speaker

SVHS Y/C

SVHS Socket

EEPROM

24LC21

Dual İnterface for

RGB HS/VS-In

D-SUB 15 socket

FPD

AD9887

EEPROM

24LC21

DVI Input

DVI Socket

L6B POWER SUPPLY BLOCK DIAGRAM (MAIN CHASSIS)

J450

12V F450 +2,5V_STBY

U451

FDS9933A

DC_IN

GND

S450 +3,3V_STBY

(5V) +5V_STBY

F451

U454

LM2576

VOLTAGE

DOUBLER

U458

NCP1117

GND

12V '33V +1,5V_STBY

U452

FDS9933N

STAND_BY +3,3V

U453

FDS9933N

PNL_EN +12V_INVERTER

12V_AMP

+5V

U457

NCP1117

+12V PANEL_POWER

U455

LM2576

U450

NCP117

U456

LM317

+8V

L6B SERVICE MENU

1. Activating the Service Menu

When the menu is on the screen press ‘9’, ‘3’, ’0’, ’1’ on the remote controller. This will

activate the service menu.

2. Service Menu Structure

The service menu has three items: display, calibre and version

2.1 Display

Display item has seven options: a- Panel

Panel option gives information about the current panel resolution. It is a read only option and can not be set.

b- Power on time

Power on time gives information about the last update time of the SW running. It is a read only option and can not be set.

c- Backlight on time

Backlight on time option reserved.

d- Scart prescale

Scart prescale option sets the prescale values for the input sounds entering the scart input of the MSP(Micronas Sound Processor). Changing this value you can adjust the level of the output sound going to loudspeakers for all the sources except the Tuners. The range is between 0 and 100.

e- nicam prescale

Nicam prescale option sets the prescale values for the Nicam standard sounds for tuner inputs. Changing this value you can adjust the level of the output sound going to loudspeakers for Nicam sounds entering the analog sound input of MSP. The range is between 0 and 100.

f- fm/am prescale

fm/am prescale option sets the prescale values for the FM/AM standard sounds for tuner inputs. Changing this value you can adjust the level of the output sound going to loudspeakers for FM/AM sounds entering the analog sound input of MSP. The range is between 0 and 100.

g- Agc(Automatic Gain Control) adjust

Agc adjust option sets the input voltage going to IF decoder AGC pin. Changing this value you can adjust this voltage for optimum Tuner performance. The range is between 0 and 31.

h- R/G/B Brightness/Contrast: These are used for color bias adjustment. The range is

Between 0 and 255

2.2 Calibre

2.3 Version

Calibre item has nine options: a- video format

Video format option force the video format to the desired format. Selectable formats are Auto, Pal, NTSC and SECAM.

b- colorspace

Colorspace option gives the information about the video input colorspace input to PW181 IC. Do not change this value unless an error occurred in the colors displayed.

c- test pattern

This option activates the internal pattern of PW181 IC. There are 3 choices: none, vert bars, solid color. None will deactivate the internal pattern. Vert bars choice activates the bar pattern for the selected color component. Solid color activates the solid pattern with one color selected in color component and also you can change the level of the color by solid field level.

d- Color components:

This option selects the color for the internal pattern of PW181 IC. There are 4 choices: all, red, green and blue. If you choose all, you can see the white pattern and if you choose one of the other choices you can see the test pattern with the selected color.

e- solid field level

This option will adjust the level of the colors for the test pattern. The range is betwwen 1 and 64.

f- Initial ATS

This option will enable or disable the Initial setup for the TV. Setting this option to On, the TV will open from the Quick setup menu. Setting this option to Off will disable this option.

g- factory reset

Factory reset option executes a reset operation for the NVRAM. Pressing OK when this option is selected will erase the NVRAM and load default values to NVRAM.

h- dpms

This option selects the Power option for the TV. Setting this option to On the TV will switch to the last state for power on transition. Setting this to Off will disable this option and the TV will always switch to Stand-by state while power on transition.

i- osd timeout

This option sets the OSD timeout for the main menu structure. Selections are 5, 15 and 60 secs. The default is 60 sec.

This item gives the information about the version of the software. Also you can see the last modified time for the GUI(graphical user interface).

L6 CHASSIS SERVICE MODE ITEMS

display menu

ITEM TYPICAL VALUES/OPTIONS

panel 1280x768

power on time 03:39:45

back light time 03:39:45 scart prescale 25 nicam prescale 45 fm/am prescale 24 agc adjust 16 red brightness 128 red contrast 128 green brightness 128 green contrast 128 blue brightness 128 blue contrast 128

calibre menu

ITEM TYPICAL VALUES/OPTIONS

video format auto color space RGB test pattern none color components all solid field level 33 initial ats on factory reset press <ok> to reset dpms on osd time out 60 sec

version

ITEM TYPICAL VALUES/OPTIONS

Software

SL630T_CH1_T13 L6B 1.22 Chi30

GUI

Project; L6B Toshiba

Generated Date: October 01,2004 at 22.42

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