Daewoo LP32L1, LM32L1, LX32L2, LM32L2, LX42L1 Service Manual

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Caution

: In this Manual, some parts can be changed for improving. their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service Information Center.

Service Manual

LCD TV

CHASSIS :

Model :

S/M NO. : TSLM10MEF0

LX32L1*** LX32L2*** LM32L1*** LM32L2*** LP32L1*** LP32L2*** HY-LCD32L2 HY-LCD32R1

LX42L1*** LX42L2*** LM42L1*** LM42L2*** LP42L1*** LP42L2*** HY-LCD42L2F HY-LCD42R1F

JUNE 2011

SL-100XB,SL-110XB SL-100MB,SL-110MB

Contents

1.Safety Precaution 3

2.Preliminary Troubleshooting 4

3.Product Specification 5

4.Service Mode 6

5.Hardware Trouble shooting 7

1) Power Supply Trouble 7

2) Display Trouble (exceptional screen) 8

3) Display Trouble (white screen) 9

4) Display Troubl (black screen) 10

5) Audio Trouble (No sound) 11

6) Function Trouble (TV video) 12

7) Function Trouble (PC) 13

8) Function Trouble (SCART,HDMI,YPbPr,DVB/TV) 14

6.Main Board Layout 15

1) Main Board layout of South America 15

2) Main Board layout of Middle-East 16

7.Features of Main board 17

8.Upgrade manual by USB port 22

9.Schematic 23

1) 32" POWER Schematic 23

2) 42" POWER Schematic 24

3) MAIN Schematic 25

10. 31

1. Safety Precaution

-3-

(1) When moving or laying down a LCD Set, at least two people must work together. Avoid any

impact towards the LCD Set.

(2) Do not leave a broken LCD Set on for a long time. To prevent any further damages, after

checking the condition of the broken Set, make sure to turn the power (AC) off.

(3) When opening the BACK COVER, you must turn off power (AC) to prevent any electric

shock.

(4) When loosening screws, check the position and type of the screw. Sort out the screws and

store them separately for reassembling. Because screws holding PCBs are working as electric circuit grounding, make sure to check if any screw is missing when assembling / reassembling. Do not leave any screws inside the set.

(5) A LCD Set contains different kinds of connector cables. When connecting or disconnecting

cables, check the direction and position of the cable beforehand.

(6) Connect/disconnect the connectors slowly with care especially FFC (film) cables and FPC

cables. Do not connect or disconnect connectors instantaneously with force, and handle them carefully for reassembling.

(7) Connectors are designed so that if the number of pins or the direction does not match,

connectors will not fit. When having problem in plugging the connectors, check their kind, position, and direction.

2. Preliminary Troubleshooting

-4-

1) LCD TV does not response or remote controller does not work.

- Check the power cord to be plugged.

- Check the battery of the remote controller.

2) Sound is discontinuous or broken sometimes.

- Set the sound effect into 'MONO'.

- Set the [SOUND] -> [Digital Volume] into proper value.

- [Digital Volume] is enabled only in digital program.

- Check if [SOUND] -> [Speaker] is on.

3) Picture of digital program is sometimes broken and sound is discontinuous.

- Digital program has a little problem because of signal receiving status.

- Check if the RF cable is correctly connected.

- Ask for the broadcasting station if the RF cable connection has no problem.

4) Picture of analog program is noisy.

- Check the RF cable connection.

- Check if [Picture] -> [N.R] is ON.

- Change the [Channel] -> [Fine Tune] value.

5) Sound is not generated in HDMI mode.

- Reconnect HDMI jack.

- DVI signal has no sound. Check the output signal of device to be connected to LCD TV.

- If you want to use DVI-HDMI cable, you should also connect audio cable into the LCD TV.

6) In spite of 'Auto Setup', picture size is not completely adapted to the screen in PC mode.

- Check if the input signal is available.

- Ensure that the desktop has no black area.

- Some errors (picture position problem) will be occurred according to certain video card. In this case, you should adjust 'Phase', 'Clock', 'H.Position', 'V.Position' control.

7) In spite of 'Auto Setup', picture is not clear in the PC mode.

- Adjust 'Phase' control.

3. Product Specification

-5-

)

(

)

CHASSIS

32 INCH

32L1/ 32L2

42 INCH

42L1 / 42L2

Standard/ Music/

Zoom2

South America Middle East South America Middle East

LTA320AP27

Model name

LCD Panel

Pixel Pitch (mm x mm) 0.51075x0.51075 0.51075x0.51075 0.4845x0.484 5 0.4845x0.4845 Brightness (cd/m2) 400 / 450 400 / 450 500 500 Contrast ratio (Dynamic) 25,000 : 1 25,000 : 1 55,000 : 1 55,000 : 1 Response time(Gray to gray) 8ms / 20ms 8ms / 20ms 5ms 5ms Viewing angle (H/V) 178/178 178/178 176/176 176/176 Normal Operation (W) 105W±10 % 105W±10 % 190W±10 % 190W±10 %

POWER

SYSTEM

Receiving system

Auto Channel Search OOOO

yB dnatS

cneuqerF

TUNING

Sound Output (RMS) 9W+9W 9W+9W 9W+9W 9W+9W

SOUND

Pre-set Sound modes

Bass / Treble / Balance O/O/O O/O/O O/O/O O/O/O

Input

Terminal

PC RGB (D-sub 15pin)1111

PC/HDMI Audio(Phone Jack)1111

Output

Terminal

Teletext

SPDIF (Optical / Coaxial) Coaxial Coaxial Coaxial Coaxial Teletext / Caption Caption Teletext Caption Teletext

/ Caption

OSD Language.

Noise Reduction (NR) O O O O

LLITS

Pre-set picture modes

Picture Format (Aspect ratio control, WSS)

Owing to our policy of continuous improvement, specifications may change

LTA320AN01

3-System

(NTSC-M, PAL-N,

PAL-M

Movie/

orts/ User

1lanimret enohpdaeH

English/Spanish/

French/Portuguese

Dynamic/ Standard/

Mild

/ User

16;9/ 4:3/ Zoom1/

B/G,D/K,I,/I',

Standard/ Music/ Standard/ Music/ Standard/ Music/

Movie/ Sports/

English, Germany,

Espanol, France,

Romania

16;9/ 4:3/ Zoom1/

LTA320AP27 LTA320AN01

1867x6631noituloseR

PAL-SECAM

NTSC

User

Arabic

Dynamic/ Standard/

Mild

/ User

LC420WUN-SBA1 LC420WUN-SCA1

3-System

(NTSC-M, PAL-N,

PAL-M

Movie/

orts/ User

English/Spanish/

French/Portuguese

Dynamic/ Standard/

Mild

/ User

16;9/ 4:3/ Zoom1/

DGLDGLCESCESrekaM LC420WUN-SBA1 LC420WUN-SCA1

English, Germany,

Espanol, France,

Romania

16;9/ 4:3/ Zoom1/

SPISPIAVPAVPedoM

06/0506/0506/0506/05)zH( ycneuqerF

9 : 619 : 619 : 619 : 61oitaR tcepsA

W5.0rednUW5.0rednUW5.0 rednUW5.0 rednU)W(

zH 06/05zH 06/05zH 06/05zH 06/05)zH( y

PAL-SECAM

B/G,D/K,I,/I',

NTSC

OXOXgninuT launaM OXOXgninuT eniF

Movie/ Sports/

User

1111FR 1111oediV-S

1111)R/L /w(etisopmoC

2222)R/L /w(tnenopmoC

2222PCDH-IMDH

1111)R/L /w(tuO rotinoM 111

0001X0001XyromeM egaP txeT.T

Arabic

OOOOremit peelS OOOOkcoL yeK

D3D3D3D3retliF bmoC

OOOOtsartnoC OOOOssenthgirB OOOOroloC OOOOssenprahS

XOXO Dynamic/ Standard/

Mild

/ User

BCBCBCBC dradnatS ytefaS

0801x02910801x0291867x663

V042 - 001V042 - 001V042 - 001V042 - 001)V( egatloV CA

MACES/LAPLAP ,CSTNMACES/LAPLAP ,CSTNmetsys roloC

MACIN, reirraC-2PAS/STMMACIN, reirraC-2PAS/STMmetsys oiduA

)462.H/p027(1)462.H/p027(1)462.H/p027(1)462.H/p027(1)0.2V(BSU

-6-

S10

Not

4. Service mode.

Using the Service Remote controller(R-74S01 or R-34SVC ),

you can enter service mode directly.

noitpircseDuneMyeK

esu toN1S

S2 Gumi Ch Map Write To set Gumi factory channels directly

To set sound(display in sequence)

Perss S3 key again and again,

S3 Volume Test

S4 ADC adjust menu Show ADC adjust menu and off(toggle key)

S5 White balance adjust menu

S8 Factory Setting menu Show Factory menu and off(toggle key)

S9 Software version & date display Show software version and off( toggle key)

S12 Shipping Mode To initialize TV and make TV standby mode

change like this: ‘Volume Min’ -

‘Volume Middle’ - ‘Volume Max’ -

‘Balance L’ - Balance R’

Show W/B adjust menu and off(toggle key)

If you want to change white balance data, press Ƈ

Ɖkey to select option that you want to adjust

then press ȘȖ key to adjust.

esu toN6S

esu toN7S

use

esu toN11S

( Tip : There isn't service remocon, you can enter Factory sett ing mode with user remocon.

Press password in sequence : Menu --> 1-->1 -->4--->7 .

After factory setting osd display, you can select and adjust with ƇƉȘȖ key. )

-7-

5. Hardware Trouble shooting

5-1) Power Supply Trouble

for 5V output

Check U4

for

1.2V

Check E1 for 5V and E2 for 3.3V output ?

Check power line or power supply

Check if U2 for 3.3V and

Check the circuit

of U2 ,U3

U4/DC-DC IC damaged

Put on the TV, Check for C10 ,C16,E5 E3 for 5V

U3 for 2.5V output?

output

L2/10μH is damaged or

It ’s normal but

the voltage is

high

false welding

output

Check if the power

on pin of power

board for 5V?

It’s normal but

the voltage is

Low

Check power board

Check if pin No.4 for U4/(DC-DC chip) is

false welding or U4 is damaged

amage

loader is in short

or the

circuit

-8-

Hardware Trouble shooting

5-2) Display Trouble (exceptional screen)

and

connected

tightly

Exceptional screen

Check if the cable is correct

Change LCD

Y N

Check if the LCD

panel is OK

Check if the output circuit from

U12 to the jack to panel are normal

Check the circuit of U12

Change or repair the damage

components in this part

Change the cable

for panel

Hardware Trouble shooting

-9-

5-3) Display Trouble (white screen)

supply

is normal

(depend on panel)

White screen

Check if the voltage of panel power

Is there voltage on grid of

Q8/3407 can changed

CN4 is ill-connected

(is there voltage for panel)

or Q8 is damaged

Check if the I/O of U12 is damaged

(the 132th pin)

(120V or 5V~0)

Check if the circuit of Q9 normal?

Is there output signal

from U12

Change the LCD panel

or the cable to panel

Q9 is damaged

U12 is illness

Hardware Trouble shooting

-10-

5-4) Display Trouble (black screen)

Black screen

Check if the voltage on

CN3/BLON is 5V

Check if the power supply

for inverter is normal

Repair the power supply The inverter is damaged

Check the control circuit from

BLON to U12 or U12 is damaged

Hardware Trouble shooting

-11-

5-5)Audio Trouble(No sound)

Check if the voltage of

Check the

from U12

No sound

Is there audio input signal

Check if the setting of volume

and MUTE are normal

Check

peripheral

audio

equipment

eset

speaker

Check the circuit

to sU6 or U12 I/O

has been damaged

Check if CN22 has

output signal

Check if the power supply of

U13/R2A15122FP –pin13 –pin14 >11V

Check if U13-pin11,12,39,40

have signal output

U13 is

damaged

U13-pin34≥2.5V

Check if the audio input signal

is normal:PC:U12-pin47,48

AV:U12-pin49,50 SCART: U12-55,56

Check the circuit

from U13 to CN22

Check if U13-pin19,32

has signal input?

Check if U12-pin64,65

has signal output?

Check if the

Change

U12

audio input from U13 is

normal or U13

is damaged

Check the

circuit between U12-pin64,65

Repair the

power

supply for

U13

+ 24 hidden pages