Daewoo LX32L1 Series User manual

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-
South America Middle East South America Middle East
DGLDGLCESCESrekaM
Model name LTA320AP27
LTA320AN01
LTA320AP27
LTA320AN01
LC420WUN-SBA1
LC420WUN-SCA1
LC420WUN-SBA1
LC420WUN-SCA1
SPISPIAVPAVPedoM
06/0506/0506/0506/05)zH(ycneuqerF
0801x02910801x0291867x663
1867x6631noituloseR
9:619:619:619:61oitaRtcepsA
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 %
W5.0rednUW5.0rednUW5.0rednUW5.0rednU)W(
yBdnatS
V042-001V042-001V042-001V042-001)V(egatloVCA
zH06/05zH06/05zH06/05zH06/05)zH(y
cneuqerF
MACES/LAPLAP,CSTNMACES/LAPLAP,CSTNmetsysroloC
Receiving system
3-System
(NTSC-M, PAL-N,
PAL-M
)
PAL-SECAM
B/G,D/K,I,/I',
NTSC
3-System
(NTSC-M, PAL-N,
PAL-M
)
PAL-SECAM
B/G,D/K,I,/I',
NTSC
(
AV
)
MACIN,reirraC-2PAS/STMMACIN,reirraC-2PAS/STMmetsysoiduA
AutoChannelSearch OOOO
OXOXgninuTlaunaM
OXOXgninuTeniF
Sound Output (RMS) 9W+9W 9W+9W 9W+9W 9W+9W
Standard/ Music/
Standard/ Music/ Standard/ Music/ Standard/ Music/
POWER
TV
SYSTEM
TV
TUNING
CHASSIS
32 INCH
32L1/ 32L2
42 INCH
42L1 / 42L2
LCD Panel
Pre-set Sound modes
Standard/
Music/
Movie/
S
p
orts/ User
Movie/ Sports/
User
Movie/
S
p
orts/ User
Movie/ Sports/
User
Bass / Treble / Balance O/O/O O/O/O O/O/O O/O/O
1111FR
1111oediV-S
1111)R/L/w(etisopmoC
2222)R/L/w(tnenopmoC
PCRGB(D-sub15pin)1111
2222PCDH-IMDH
PC/HDMIAudio(PhoneJack)1111
)462.H/p027(1)462.H/p027(1)462.H/p027(1)462.H/p027(1)0.2V(BSU
1111)R/L/w(tuOrotinoM
111
1lanimretenohpdaeH
SPDIF (Optical / Coaxial) Coaxial Coaxial Coaxial Coaxial
Teletext / Caption Caption Teletext Caption Teletext
0001X0001XyromeMegaPtxeT.T
OSD Language. English/Spanish/
French/Portuguese
English, Germany,
Espanol, France,
Romania
,
Arabic
English/Spanish/
French/Portuguese
English, Germany,
Espanol, France,
Romania
,
Arabic
OOOOremitpeelS
OOOOkcoLyeK
D3D3D3D3retliFbmoC
Noise Reduction (NR) O O O O
OOOOtsartnoC
OOOOssenthgirB
OOOOroloC
OOOOssenprahS
XOXO
LLITS
Pre-set picture modes
Dynamic/
Standard/
Mild/ User
Dynamic/
Standard/
Mild/ User
Dynamic/
Standard/
Mild/ User
Dynamic/
Standard/
Mild/ User
Picture Format
(Aspect ratio control, WSS)
16;9/ 4:3/ Zoom1/
Zoom2
16;9/ 4:3/ Zoom1/
Zoom2
16;9/ 4:3/ Zoom1/
Zoom2
16;9/ 4:3/ Zoom1/
Zoom2
Teletext
/ Caption
SOUND
Output
Terminal
Input
Terminal
Zoom2
Zoom2
Zoom2
Zoom2
BCBCBCBCdradnatSytefaS
Owing to our policy of continuous improvement, specifications may change

-6-
Using the Service Remote controller(R-74S01 or R-34SVC ),
you can enter service mode directly.
noitpircseDuneMyeK
esutoN1S
S2 Gumi Ch Map Write To set Gumi factory channels directly
S3 Volume Test
To set sound(display in sequence)
Perss S3 key again and again,
change like this: ‘Volume Min’ -
‘Volume Middle’ - ‘Volume Max’ -
‘Balance L’ - Balance R’
S4 ADC adjust menu Show ADC adjust menu and off(toggle key)
S5 White balance adjust menu
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.
esutoN6S
esutoN7S
S8 Factory Setting menu Show Factory menu and off(toggle key)
S9 Software version & date display Show software version and off( toggle key)
S10
Not use
S10
N
o
t
use
esutoN11S
S12 Shipping Mode To initialize TV and make TV standby mode
( 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. )
4. Service mode.

-7-
5. Hardware Trouble shooting
5-1) Power Supply Trouble
Check E1 for 5V and E2 for 3.3V output ?
Y
N
Check power line or power supply Put on the TV, Check for C10 ,C16,E5 E3 for 5V
output
Y
N
Check power board
for 5V output
Check if U2 for 3.3V and
U3 for 2.5V output?
Y
N
for
5V
output
Check the circuit
Check U4 for 1.2V
YN
Y
N
of U2 ,U3 Check if the power
on pin of power
board for 5V?
OK
Check
U4
for
1.2V
output
YN
U4/DC-DC IC damaged L2/10μH is damaged or
false welding
It ’s normal but
the voltage is
high
It’s normal but
the voltage is
Low
E6 i d d th
Check if pin No.4 for U4/(DC-DC chip) is
false welding or U4 is damaged
E6
i
s
d
amage
d
or
th
e
loader is in short
circuit

-8-
Hardware Trouble shooting
5-2) Display Trouble (exceptional screen)
Exceptional screen
Check if the cable is correct
and connected tightly
and
connected
tightly
Y N
Check if the LCD
panel is OK
YN
Check if the output circuit from
U12 to the jack to panel are normal
YN
Change the cable
for panel
Change LCD Check the circuit of U12 Change or repair the damage
components in this part

Hardware Trouble shooting
-9-
5-3) Display Trouble (white screen)
White screen
Check if the voltage of panel power
supply is normal (depend on panel)
supply
is
normal
(depend
on
panel)
YN
Is there voltage on grid of
Q8/3407 can changed
(120V or 5V~0)
Is there output signal
from U12
NY YN
CN4 is ill-connected
(is there voltage for panel)
or Q8 is damaged
Check if the circuit of Q9 normal? Change the LCD panel
or the cable to panel U12 is illness
Y
N
Check if the I/O of U12 is damaged
(the 132th pin) Q9 is damaged
Y
N

Hardware Trouble shooting
-10-
5-4) Display Trouble (black screen)
Black screen
Check if the voltage on
CN3/BLON is 5V
NY
Check if the power supply
for inverter is normal
YN
Check the control circuit from
BLON to U12 or U12 is damaged
Repair the power supply The inverter is damaged

Hardware Trouble shooting
-11-
5-5)Audio Trouble(No sound)
No sound
Is there audio input signal
NY
Y
N
Check if the setting of volume
and MUTE are normal
N
Check if CN22 has
output signal
YN
Check if the power supply of
U13/R2A15122FP –pin13 –pin14 >11V
Check if the voltage of
N
Y
Check
if
the
voltage
of
U13-pin34≥2.5V
Check if U13-pin19,32
has signal input?
Y
N
Y
N
Y
N
Check if U13-pin11,12,39,40
have signal output
Check if U12-pin64,65
has signal output?
Y
NYN
Check
peripheral
audio
equipment
Repair the
power
lf
R
Check the
Check the circuit
from U12
Check the
circuit
between
Check if the audio input signal
is normal:PC:U12-pin47,48
AV:U12-pin49,50 SCART: U12-55,56
YN
supp
l
y
f
or
U13
R
eset
Check
the
speaker
from
U12
to sU6 or U12 I/O
has been damaged U13 is
damaged
Check the circuit
from U13 to CN22
U12-pin64,65
Change
U12
Check if the
audio input
from U13 is
normal or U13
is damaged

Hardware Trouble shooting
-12-
5-6) Function Trouble (TV video)
TV can’t search any
channel/no picture
Confirm if the RF
cable do have signal
cable
do
have
signal
N Y
Check if T2-pin7 for 5V
YN
Check if T2-pin5,6 has
I2C signal
N
Y
Check if t1-pin9&10have signal
NY
Check if T2-pin2 for variational
voltage within 1.8V~4.3V
NY
Check the circuit
from T2-pin9&10 to
U12 Check the circuit
in this part
Change T2 Check the I2C circuit
(between T1-pin5,6
Check external
RF
signal source
Check the
power
supply
circuit
and the power
supply for U12
in
this
part
and 82,83)

Hardware Trouble shooting
-13-
5-7) Function Trouble (PC)
PC mode
Picture is not
in center
Missing color,
deflection color
Picture
dithering No signal
Check if the R.G.B
input signal of U12 is normal
Y
N
Check if the signal of
V-sync,H-sync is OK
Y
N
Y
N
Y
N
Do “auto adjust”
process on the menu
Check the circuit of
R.G.B input
Check the circuit
of VS.HS
Do “reset” process
on the menu or
the input mode
can’t be supported
Check the circuit
of VS.HS
Do “reset” process

Hardware Trouble shooting
-14-
5-8) Function Trouble (SCART,HDMI,YPbPr,DVB/TV)
SCART RGB .SCART Video. HDMI,S-VIDEO,CVBS
Missing color,
deflection color
HDMI,S-VIDEO
does not CVBS does not
has the signal
deflection
color
has the signal
has
the
signal
Ch k if R G B i t
Check if the
U12/6M181
i44
Ch
ec
k
if
R
.
G
.
B
i
npu
t
of U12 is normal
NY
U12/6M181
-p
i
n
44
have signal input
Check the circuit
YN
1 .HDMI interface false
welding
2 .System setting wrong ,
do
“
reset
”
Check
the
circuit
between CVBS
interface and U12
OK
Do “reset”
on the menu
1.Check the R.G.B circuit
˄If it is on SCART channel,you
should check the input circuit of
SCART
RGB
˅
do
reset
SCART
-
R
.
G
.
B
˅

-15-
6. Main Board Layout
6-1) Main Board layout of South America

-16-
Main Board Layout
6-2) Main Board layout of Middle-East

-17-
7.Features of Main board
Max storage
Channels
Middle-East : 200CH
South America :181CH
TELETEXT or
CAPTION
Middle-East : TELETEXT 1000Pages
South America :CAPTION
PC-RGB Format Up to SXGA@75Hz
CVBS
Video System PAL/NTSC/SECAM
Video level 1.0 VP-P ±5%
S-Video S-Y:0.714 VP-P±5%, S-C:0.286 VP-P±5%
Component 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
HDMI 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
AUDIO INPUT
PC Audio Earphone Input 0.2 ~ 2.0 VRMS
Component1 Audio L/R RCA Input 0.2 ~ 2.0 VRMS
CVBS & Component2
& S-Video Audio
L/R RCA Input 0.2 ~ 2.0 VRMS
AUDIO OUTPUT
Frequency Response 100Hz~15KHz @±3dB (1KHz, 0dB reference signal)
Max Output power 2×9W(8 Ω) THD+N<10%@1KHz
(Power Supply: 24V, Audio Input: 0.5VRMS )
POWER
Requirement 24V/12V/5V/5VSB
To Panel 12V
Management Standby Power Consumption < 0.5W(Board Only)
COMB FILTER 3D
DEINTERLACE 3D
WEAK SIGNAL
ENHANCEMENT YES
NOISE
REDUCTION YES
USB FUNCTION Multimedia, Software upgrade
KEY FUNCTION MENU, CH+, CH-, VOL+, VOL-, INPUT, POWER
CHIPSET
MST6M181VS(without TELETEXT and NICAM)
/MST6E181V (with TELETEXT and NICAM)
MARKET AREA Asia-Pacific, Middle-East or South America
OSD LANGUAGE Middle-East : English, Germany, Espanol, Arabic, Romania, France
South America :English, French, Spanish, Portuguese
PANEL
Panel Type LCD
Interface Single/Dual LVDS Interface
Max Resolution 1920×1080
VIDEO INPUT TV
Receiving Range 48.25MHz-863.25MHz
Input impedance 75 Ω
Video System
Sound System
NICAM(only for MST6E181V)/A2
Middle-East : PAL, SECAM
South America : NTSC, PAL
Middle-East : B/G,D/K,I or NICAM
South America : M,N

-18-
Features of Main board
TERMINALS
INPUT
57rotcennoC-CEI1VTΩ
)lacitrev(tolSBSU1BSU
)latnoziroh(slanimretIMDH×2IMDH
)nip51,eulb(lanimretBUS-D1BGR-CP
)kcalb(lanimretenohpraE1oiduACP
)kcalb(lanimretenohpraE1oediV-S
Component1 & Component1
Audio
5RCA terminals(green, blue, red,
red, white)
)wolley(lanimretACR11SBVC
32tnenopmoC RCA terminals(green, blue, red)
CVBS1 & Component2 & S-Video
Audio
2 RCA terminals( red, white)
OUTPUT AV (CVBS2) Out 3 RCA terminals(yellow, red, white)
Coaxial(optional) 1 RCA terminal(orange)
)kcalb(lanimretenohpraE1tuOenohpraE
USB MULTIMEDIA PLAYBACK FORMAT
Media
File
Ext.
Codec
Remark
Video Audio
Movie
.avi
MJPEG
MP3, WMA, AAC
MP2, PCM, AC3
Max Resolution And Frame Rate:
720p@30fps
Max Data Rate: 10 Mbps
Xvid, MPEG-2,
MPEG-4, DIVX
Max Resolution And Frame Rate:
720p@30fps
Max Data Rate: 20 Mbps
.mp4
MPEG-2, MPEG-4,
DIVX
.ts/
.trp
MPEG-2
.mkv/
.mov
MPEG-4
.mpg MPEG-1, MPEG-2
.dat MPEG-1
MP2
Max Resolution: 352×288
Max Data Rate: 20 Mbps
.vob MPEG-2
Max Resolution: 720×576
Max Data Rate: 20 Mbps
.rm/
.rmvb
RV8, RV9, RV10 COOK
Max Resolution And Frame Rate:
720p@30fps
Max Data Rate: 10 Mbps
Music
.mp3 -- MP3
Sample Rate: 32K~48KHz
Bit Rate: 32K~320Kbps
Channel: Mono/Stereo
.wma -- WMA
.m4a/
.aac
-- AAC
Sample Rate: 8K~48KHz
Bit Rate: 24K~384Kbps
Channel: Mono/Stereo
Photo
.jpg/
.jpeg
Progressive JPEG Max Resolution: 1024×768
Baseline JPEG Max Resolution: 15360×8640
--pmb.
Max Resolution: 9600×6400
Pixel Depth: 1/4/8/16/24/32 bpp
.png
Non-Interlaced Max Resolution: 9600×6400
Interlaced Max Resolution: 1200×800
File system: Hi Speed FS, FAT32, FAT16, NTFS(NTFS compressed file is not supported).
Note: Licenses are required for AC3 and DivX.

-19-
Features of Main board
ELECTRICAL CHARACTERISTICS & REQUIREMENTS
Power Supply
Mode
Symbol Voltage Range
Max
Current
Ripple
Voltage
@25 ℃
℃
Startup
Time
Rise
Time
24V/12V/ 24V 22V~25V 1000mA 240mV P-P ≤100ms ≤50ms
ƃ CN2(10PIN/2.54): MAIN POWER SUPPLY CONNECTOR
NO. SYMBOL DESCRIPTION
ybdnatSylppuSrewoPBSV51
lortnoCybdnatSylppuSrewoPNOWP2
3 GND
Ground
4 GND
5 P5V
+5V Power Supply for Panel
6 P5V
7 5V
Main +5V Power Supply
8 5V
dnuorGDNG9
ylppuSrewoPCDV21+V2101
ƃ CN3 (6PIN/2.0): INVERTER CONNECTOR
NO. SYMBOL DESCRIPTION
1 12V
+12V DC Power Supply for high-pressure bar
2 12V
lenaProflortnoCFFO/NOthgiL-kcaBOLB3
lenaProftnemtsujdAssenthgirBJDA4
5 GND
Ground
6 GND
ƃ CN20(14PIN/2.0): KEY & IR BOARD CONNECTOR
NO. SYMBOL DESCRIPTION
ylppuSrewoPCDV5+V51
rotacidnIdeRDER2
rotacidnIneerGNRG3
revieceRRIRI4
dnuorGDNG5
0yeK0K6
1yeK1K7
2yeK2K8
3yeK3K9
4yeK4K01
5yeK5K11
6yeK6K21
)devreseR(7yeK7K31
dnuorGDNG41

-20-
Features of Main board
ƃ CN21(2 ×
×
20PIN/2.0): LVDS INTERFACE
NOTE: PIN31~40 are optional. The connector or each PIN can refer to the panel specification.
NO. SYMBOL DESCRIPTION
1 VSEL
Power Supply for Panel
2 VSEL
3 VSEL
4 GND
Ground
5 GND
6 GND
langiS-0DDOSDVL-0OXR7
langiS+0DDOSDVL+0OXR8
langiS-1DDOSDVL-1OXR9
langiS+1DDOSDVL+1OXR01
langiS-2DDOSDVL-2OXR11
langiS+2DDOSDVL+2OXR21
13 GND
Ground
14 GND
langiS-kcolCDDOSDVL-COXR51
langiS+kcolCDDOSDVL+COXR61
langiS-3DDOSDVL-3OXR71
langiS+3DDOSDVL+3OXR81
langiS-0NEVESDVL-0EXR91
langiS+0NEVESDVL+0EXR02
langiS-1NEVESDVL-1EXR12
langiS+1NEVESDVL+1EXR22
langiS-2NEVESDVL-2EXR32
langiS+2NEVESDVL+2EXR42
25 GND
Ground
26 GND
langiS-kcolCNEVESDVL-CEXR72
langiS+kcolCNEVESDVL+CEXR82
langiS-3NEVESDVL-3EXR92
langiS+3NEVESDVL+3EXR03
*31 GND
Ground
*32 GND
*)leveLhgiHroFtluafeD(lortnoCleveLcigoL1NOC33
*elbanEyalpsiDPDPYALPSID43
*IrorewoPdevreseR1LESV53 2C SCL
*IrorewoPdevreseR2LESV63 2C SDA
*langiS-4DDOSDVL-4OXR73
*langiS+4DDOSDVL+4OXR83
*langiS-4NEVESDVL-4EXR93
*langiS+4NEVESDVL+4EXR04