BEKO LM Schematic

SERVICE MANUAL
LM CHASSIS

CONTENTS PAGE

Safety Instructions 3
Technical Specifications 4
Features 5
Inputs/Outputs Diagram 6
Remote Control 7
Set Apperance 8
Service Adjustments 9
Block Diagram 12
Power Supply Diagram 13
Data Sheet VCT4993 14
Data Sheet MST6181 16
Data Sheet MTV512 24
Data Sheet TVP5150A 26
Parts List 32
Circuit Diagram Attached

SAFETY PRECAUTIONS

GENERAL GUIDELINES

1. 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.

2. After servicing , see that all the protective devices

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

3. 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 so ft 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 humidity

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.

7 - Electrostatic discharge can make

Damage

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.

Technical specifications chart

Picture tube

size/type

Sound outlet

power (10% THD)

Power

consumption

Stand-by Power

consumption

27” 16:9

active matrix TFT

2x7 W

120 W

1 W

General technical specifications

Power supply

AC: ............................................................................

Program memory: ...................................................100

RF Antenna input: ...................................................75 Ohm (Co-axial)

Loudspeaker impedance: ......................................4 Ohm

Sound systems:.......................................................Mono/Stereo/Nicam

Batteries:..................................................................2xUM - 4, IEC R03 or AAA 1.5V

Received channels:.................................................VHF (Band I channel 2-4)

..................................................................................VHF (Band III channel 5-12)

..................................................................................UHF (Channel 21-69)

..................................................................................Cable TV (S1-S20/S21-S41)

Received broadcasting systems............................PAL B G

230V~50 Hz

PAL SECAM BG
PAL SECAM BG DK/DK’
PAL SECAM BG LL’
PAL I

Note: Your television has been manufactured in accordance with your country by selecting from
among the above mentioned broadcasting systems and this system cannot be changed by the user
except the case described below: In countries where BG/DK and BG/LL’ broadcasts are done (BG
or DK / BG and LL’). For further information, see the settings part about your television.

4

Your Television

Features

• 27” TFT-LCD WXGA Panel

• Available for cable broadcasts

• 2x7 W Stereo sound

• 12 pages of teletext Feature

• PIP (Picture in Picture) Feature from AV

• Wide angle of vision

• Scart socket, AV Socket and external sound system connection

• S-VHS and Cinch inputs for S-Video connection

• PC connection

• Low energy consumption

•AVL

•ATS

• Programmable power off

• Graphic equalizer

• The feature of sharpness in Colour Transitions (CTI)

• Sharpness feature and picture resolution (LTI) in the black-white transitions

• A clear Picture made possible by the Digital Comb Filter

• On screen viewing of all settings, program numbers and all the processes

• Manual Fine Tuning

• 100 Program memory

• Infrared Remote Control equipped all the functions

• Child Lock

• Feature of viewing the NTSC broadcast to be entered via Scart
Easy performance of the processes via the advanced menu system. Ability to choose 26 different
menu languages.

• HDMI feature

5

S-VHS

AV-3

12

11

SCART1SCART 2RLV

AUDIO

DVI-D

LRYPbPr

HDMI

PC-

R

LV

ANT IN

COMPONENT

AV-OUT

VIDEO INPUT

PC-DVI

IN

AUDIO-IN

13

10

AV3

S-VHS

V L R

15

16

17

18

123

SPDIF L

AUDIO-OUT

20 22 25 28 29 3019 21 23 24 26 27

1. Standby status indicator

2. Network power on/off button

3. Remote control receiver

4. Volume turn-down button

5. Volume enhancement button

6. Menu Button

7. Source selection

8. Program decrease button

9. Program increase button

10. Speaker

11. Scart 1

12. Scart 2

13. Power supply input

14. Headphones output

15. S-VHS connector

ANT IN

4

567 8 9

AUDIO

L PC-INR Y Pb Pr

COMPONENT
VIDEO INPUT

HDMI

16. Video input CINCH connector

17. Sound input CINCH connector (Left/L)

18. Sound input CINCH connector (Right/R)

19. SPDIF Digital audio output

20. Sound output (Left/L)

21. Sound output (Right/R)

22. Antenna input

23. Component sound input (L)

24. Component sound input (R)

25. Component video input (Y)

26. Component video input (Pb)

27. Component video input (Pr)

28. HDMI

29. VGA (PC connection input)

30. PC sound input

PC

AUDIO-IN

14

Note:

• Please do not use the video RCA and S-Video connection simultaneously, in that case, these
two devices might influence the picture quality of one another.

• RGB offers the best picture quality over the Scart.

6

Remote Control

1

2

3
4

5

6

7

8

9

10
11

12

13
14
15

16

17

18

19

20
21
22

PIP SEL.

AV

123

456

789

ZOOM

PR- PR+

VOL-

i

PIP POS.

PC

0

OK/

FREEZE

TEXT/

MIX

1. Picture Format selection button ( )

PAT

PIP SIZE

TV

2. Temporary sound mute (Mute) button (

3. Equalizer selection button (

23
24

25

26
27

28

4. PIP Position selection button

5. PIP/PAP On-Off button

6. AV modes selection menu button

7. Numeric buttons

8. ZOOM mode selection button

9. Program down button (

10. Upward movement button(

11. Volume turn-down button (

12. Left movement button (

)

)

) (Menus)

)

) (Menu)

)

13. Confirmation(OK) and Temporary picture
freeze button (Freeze) ( )

SWAP

29

30

14. Info / Txt index page button (

15. Downward movement button (

16. Txt Question/Answer button (Reveal) (

17. Red teletext button (

VOL+

MENU

?

31

32

33

34

35

18. Teletext page enlarge button (Double) (

19. Blue Teletext button (

)

20. Teletext / Mix selection buttons (

21. UPDATE Button/Teletext time (

22. Yellow teletext button (

23. Stand-by On/Off button (

24. Picture Mode selection button (

25. PAT (Picture and Teletext) Mode
Power On-Off button

)

) (Menus)

)

)

)

)

)

)

)

)

26. PIP size selection button

36

27. PC mode access button

28. PC mode access button

29. Final program selection button (SWAP)

)

(

30. Program forward selection button (

31. Audio turn up button (

32. Right movement button (

)

) (Menus)

)

33. MENU button

34. Txt Stop button (Hold) ( )

35. Green teletext button (

36. Sub page button (SUB PAGE) (

)

)

7

SET APPERANCE

INVERTOR(BUILT IN PANEL) MAIN CHASSIS POWER SUPPLY BOARD

8

LM SERVICE MODE

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 Mode Options

There are 6 submenus in this mode:
OPTIONS0, OPTIONS1, SOUND OPTIONS,IF SETTINGS, DIMMING, ADJUSTMENTS

2.1 OPTIONS0

STANDBY CUSTOME (Customer), FACTORY
TEXT Teletext Type : FAST (Fasttext), FAST TOP (Fastext and Toptext)
TEXT TBL AUTO : Selects the table according to the selected menu language
WEST: English-French-German-Turkish-Spanish-Italian-Finnish-Swedish

Norwegian, Danish

EAST : Polish-French-Hungarian-Czech-German-Sovenian-Italian-Romanian
GREE : WEST + Greek
CYRL : English-Russian-German-Czech-Estonian-Ukrainian-Letvian
ARAB : West + Arabian
FARS : West + Persian
HEBR : West + Hebrew
LANGUAGE A: English-German-French-Italian-Spanish-Portuguese-Greek-Turkish-Dutch-Swedish-

Danish-Norwegian-Finnish-Slovenian-Polish-Hungarian-Russian-Hebrew-Romanian­Croatian-Czech-Slovak-Albanian-Bulgarian- Macedonian-Serbian

B: English-German-French-Italian-Spanish-Portuguese-Greek-Turkish-Dutch-Swedish-

Danish-Norwegian-Finnish-Slovenian-Polish-Hungarian-Russian-Romanian-Croatian­Czech-Slovak-Albanian-Bulgarian- Macedonian-Arabic-Persian

PANEL Selects the software according to the panel name :

26 AU5, 32 AU3, 26 SS2, 32 SS3, 27 CH5, 32 CH2, 26 LP6,37 LP2, 26
QD2, 32 QD2

PIP NO (PIP via AV is not on), AV (PIP via AV is on)
PLUG PLAY ON (Demo mode), OFF

2.2 OPTIONS1

BLUEBACK ON, OFF
CTI Colour Transient Improvemnet Feature : ON, OFF, MENU
DNR Digital Noise Reduction : ON, OFF, MENU (selection via User Menu)
PROTECTION ON, OFF
PANORAMA AVAIL (On), NAVAIL (Off)
RC UNIT Remote Control Type: 43 Key, 45 key
PAT Picture and Text feature: AVAIL (On, Default), NAVAIL (Off)
HOTEL Simple Hotel TV feature: AVAIL (On), NAVAIL (Off)
HOTEL VOL Maximum sound level for Hotel Mode

9

2.3 SOUND OPTIONS

BG EUROPE, NEWZ (New Zelland) AUST (Australia), NAVAIL (no BG)
DK AVAIL, NAVAIL
L/L AVAIL, NAVAIL
DOLBY AVAIL, NAVAIL
BASS OPT NONE (bass is not activated), DYN (Dinamic bass is activated),

SUBW (Subwoofer feature is on)

HEADPHONE AVAIL, NAVAIL
CARRI MUTE MSP (for all markets except Turkey), MICRO (for Turkey)

2.4 IF SETTINGS

TUNER PS DA5, THOMSON, TEMIC, PS D44, ALPS, PHILIPS
VHF III UHF AGC adjustment is 5 for this frequancy band
VHF I AGC adjustment is 5 for this frequancy band
AGC Method AGC adjustment method: FIXED, SYNC&PW, SYNC, S&PW&PD (Default)
SECAM MTD Secam decoding method : OLD, NEW (default)

2.5 DIMMING

No adjustment will be made in this menu for service purposes. Default value is 0.

2.6 ADJUSTMENTS

No adjustment will be made in this menu for service purposes. Default values are given below:

VCTI BLE BLE MODE 3
BLE GAIN 2
BLE TILT 8
BLE STATIC 7

FAC LTI LTI CORING 0
LTI GAIN 0

SLL SUCARR SLLTHDV 6
SUBCARIIER 19

LUMA DELAY DLY PAL 7
DLY SECAM 10
DLY NTSC 9

SCART RGB BRI -14
CONT 47
CB SAT 50
CR SAT 50
TINT 0
RGAIN 34
GGAIN 33
BGAIN 35

10

MSTAR 6CR 5
6CG 5
6CB 8
6CC 0
6CM 3
6CY 2
6CF 5
SPECTRUM 1

ADJUST R GAIN 122
G GAIN 128
B GAIN 90
R OFFSET 125
G OFFSET 125
B OFFSET 126
SUBCON 58
SUB BRI 42

2.7 EEPROM EDIT

No adjustment will be made in this menu for service purposes.

11

Chassis LM Block Diagram

Analog Tuner1

TU300

Analog Tuner2

TU302

IC329

Flash

IC335

128MB DDR

IC328

TxtRAM

Scart1

Scart2

SVHS

IR&Key

I2C

IC311

MTV512

Monitor

Controller

IC324

VCTi4993G

MAX9704

Audio Amp.

TDA7059

Headph. Amp

IC321

IC338

IC336

FRC 94XXA

IC309

TVP150

Video Decoder

IC301

HDMI

IC334

MST6181

VGA YPrPb

Optional

LVDS

Basic