Daewoo DLT-26C2, DLT-26C3, DLT-32C1, User manual

CONTENT
1. Safety Precaution ----------------------------------------------------- 1
2. Product Specification ----------------------------------------------- 2
2-1. Specification ----------------------------------------------------- 2
2-2. Available Input Signal ---------------------------------------- 3
3. Block Diagram --------------------------------------------------------- 4
3-1. Signal Block Diagram ---------------------------------------- 4
3-2. Power Tree ------------------------------------------------------- 5
4. Description of Each Block ----------------------------------------- 6
5. Service Mode -------------------------------------------------------- 11
6. Trouble Shooting --------------------------------------------------- 14
7. Software Upgrade --------------------------------------------------- 26
8. Schematic Diagram-------------------------------------------------- 35
9. Printed Circuit Board ----------------------------------------------- 42
10. Mechanical Exploded Diagram -------------------------------- 44
11. Part list----------------------------------------------------------------- 48

1. Safety Precautions
(1) When moving or laying down a LCD Set, please deal with care. Avoid any impact towards
the LCD Set.
(2) Do not leave the broken LCD Set on for a long time. To prevent any further damages, after
check the broken Set˅s condition, make sure to turn the power (AC) off.
(3) When opening the BACK COVER, turn off the power (AC) to prevent electric shock.
(4) When loosening screws, check the connecting position and type of the screw. Sort out the
screws and store them separately. Because screws holding PCB are working as electric
circuit GROUNDING, make sure to check if any screw is missing when assembling.
(5) A LCD Set contain different kind of connector cables. When connecting or disconnecting
connector cables, check the direction and position of the cable beforehand.
(6) When disconnecting connectors, unplug the connectors slowly with care.
(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, make sure to check
their kind, position, and direction.
TGXGT

2.Product Specification
2-1. Specification
MODEL DLT-26C2/C3, DLT-32C1/C2/C3, DLT-37C3
CHASSIS SL-230T
COUNTRY EUROPE
TV SYSTEM
(ANALOG)
Receiving system PAL B/G, D/K, I/I,
SECAM B/G, D/K, L/L’, NTSC(AV)
Sound transmission FM MONO, 2-CARRIER, NICAM stereo
Memory channel 99CH
TV SYSTEM
(DIGITAL) Tuning system DVB-T
Decoding method MHEG-5(UK)
INPUT
RF 75OHM COAXIAL
SCART Full Scart × 1, Half Scart × 1
RCA 1
S-VIDEO 1
COMPONENT 1
PC RGB D-SUB(15pin) × 1
PC AUDIO 3.5mm Mini-Jack
HDMI 1
CI SLOT PCMCIA × 1
RS232C D-SUB(9pin) × 1
OUTPUT Monitor-out 1
Headphone 3.5mm Mini-Jack
SPDIF output Optical sensor × 1
SOUND
OUTPUT 10W + 10W, 8ȍ
LCD PANEL
DLT-26CDLT-32C DLT-37C3
Screen size 26" 32" 37"
Aspect ratio 16:9 16:9 16:9
Resolution 1366 × 768 1366 × 768 1366 × 768
Pixel pitch 0.4215mm 0.51075mm 0.600mm
Contrast ratio 1000:1 1200:1 800:1 1200:1 800:1
Viewing angle 170/170(H/V) 170/170(H/V) 170/170(H/V) 170/170(H/V) 178/178(H/V)
Panel maker AUO SEC AUO SEC LPL
Power
Consumption Max. 130W 100W 150W 160W 160W
Power source 100~240V, 50/60HZ
Dimension
(W × H × D)
DLT-26C2 812 × 502.7 × 240 mm
DLT-26C3 674 × 550 × 240 mm
DLT-32C1/C3 806 × 628.5 × 240 mm
DLT-32C2 944 × 575 × 240 mm
DLT-37C3 940 × 720 × 328.5 mm
TGYGT

2-2. Available Input Signal
Resolution V-freq Component PC HDMI Standard
640 × 480 60HZ X O O VESA Standard
72HZ X O X VESA Standard
75HZ X O O VESA Standard
800 × 600 60HZ X O O VESA Standard
72HZ X O X VESA Standard
75HZ X O O VESA Standard
1024 × 768 60HZ X O O VESA Standard
70HZ X O X VESA Standard
75HZ X O O VESA Standard
1360 × 768 60HZ X O O VESA Standard
720 × 480i 60HZ O X X
720 × 480P 60HZ O X O
720 × 576i 50HZ O X O
720 × 576P 50HZ O X O
1280 × 720P 50HZ O X O
60HZ O X O
1920 × 1080i 50HZ O X O
60HZ O X O
TGZGT

HDMI Decoder
MST3383M
(IC401)
TV
RF TUNER
Analog
IF IC
TDA9886T
(IC506)
EEPROM
24LC32
(IC503)
SW IC
4052
(IC705)
SDRAM (16M)
K4S281632F
(I101)
FLASH(8M)
S29JL064H70T
F100 (I103)
MPEG
Decoder
MDE9518
(I100)
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TG[GT

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TG\GT

4. DESCRIPTION OF AV PART
1. IC501 (VCT6973G-FA)
: IC family of high-quality single chip TV processors
AUDIO
- Sound IF input
- FM Stereo Radio and RDS/RBDS
- Multistandard TV-sound demodulation
All A2/NICAM standard
BTSC/SAP with DBX
EIA-J
- Baseband sound processing for loudspeaker channel
Volume, bass, treble, loudness, balance
Spatial effect
Micronas BASS
SRS WOW
SRS Trusurround XT
TG]GT

Lipsync function
CONTROLLER
- High-performance 8-bit microcontroller, 8051 compatible
- Up to 512kbyte in system program Flash
- WST, PDC, VPS, and WSS acquisition
- Close caption and V-chip acquisition
- Up to 10 page on chip teletext memory
- Up to 1000pages with internal memory
- Up to 30 GPIO
VIDEO
- CVBS, S-VHS, YCbCr and RGB inputs
- HDTV YPbPr and RGB inputs
- Linedoubling with vertical detail enhancement (without internal memory)
- State of the art motion adaptive up conversion (without internal memory)
- 4H adaptive comb filter for PAL/NTSC (without internal memory)
- 3D comb filter for PAL/NTSC
- Internal SDR RAM interface
- Powerful horizontal and vertical scaling inclusive nonlinear horizontal scaling
“panorama vision”
- Picture adaptive image improvement
(DCE, LSE, CTI, LTI, SCE, NCE)
PANEL CONTROL
- LVDS output (dual channel)
- Digital RGB out 3X10 bit single channel or 2X3X8bit dual channel
- 6 free programmable panel control signals (PCS)
- Backlight modulation
2. IC401 (MST3383M) – HDMI DECODER
- Highly integrated HDMI interface for 25~170MHz pixel rate
- Compatible with VGA through UXGA RGB graphics signals,
TG^GT

and component TV, DTV and HDTV
- One DVI/HDMI single link input
- HDMI 1.0 compliant
- Smart sync detection with HSYNC, VSYNC and DE period report
HDMI INTERFACE
- 25~170MHz operation
- Support High Definition Multimedia Interface – HDMI 1.0
- Support High bandwidth Digital Content Protection – HDCP 1.0
- Backward compatible to DVI 1.0
- Support up to 25-meter cable
- Support encrypted video contents
- Support authentication of video receiver with decryption of encoded
data at the receiver
Digital Audio Output Interface
- Support 2-channel serial audio output
- Support S/PDIF digital audio output
- Support audio sample rates of 32~192kHz, with a sample size of 16~24 bits
TG_GT

Digital Video Output Interface
- Support color space conversion and sRGB
- Support 24-bit 4:4:4 YCbCr/RGB output formats
- Support 16-bit 4:2:2 YCbCr output formats(ITU.601)
- Support 8-bit 4:2:2 YCbCr output formats(ITU.656)
3. I100 (MDE9518D) – MPEG DECODER
- Single-chip digital-TV DVB decoder, including transport stream demultiplexer,
Embedded descrambler, MPEG audio, and video decoder
- Decodes FTA(Free-To-Air), CA(Conditional Access), and DVB-scrambled
Broadcasts
- Full DVB support, as well as SDTV resolution of ATSC standard
- Two transport stream inputs
- MP@ML (main profile at main level) MPEG-2 video input with bit rates up to
15Mbps
- Decoding of MPEG audio bit stream, support of PCM formats, S/PDIF audio output
- Embedded 32-bit RISC processor (Lexra LX-4280)
- High performance 2D graphics accelerator
- Integrated audio and video DACs
- Support of 4 graphics/video layers (background, video, PIP or subtitle, graphics)
- Video resolution up to full CCIR:
NTSC : 720X480@ 30 fps (interlace)
PAL : 720X576 @ 25 fps (interlace)
- Digital ITU.656 and RGB output
- Single external SDRAM memory(16/32bit)
- Control interface for 2CI modules, 2XI2C, 1UART/Modem, SSC, 1xSmartCard,
up to 64 GPIO
- Remote, “over-the-air” download of executable code
TG`GT

4. I300(DRX3975D) – COFDM DEMODULATOR
- Integrated microprocessor to perform autonomous detection and operation of
All possible DVB-T modes, without interaction with the host processor
- Meets all international DVB-T performance requirements standard :
Nordig Unified, DTG, EICTA
TGXWGT

5. Service mode
1. Description of user menu
1) Picture
- Picture Mode : Favourite
- Brightness : 42
- Contrast : 48
- Colour : 32
- Sharpness : 32
- Tint : 0 (NTSC only)
- N.R : Off
2) Sound
- Sound Effect :Flat
- AVC : Off
- Balance : 0
- Equalizer (Flat mode only)
గ120 Hz : 0
గ500 Hz : 0
గ1.5 KHz : 0
గ5 KHz : 0
గ10 KHz : 0
3) Screen
- Colour temp : Normal
- Compent, PC, HDMI : Componet,PC,HDMI mode only
4) Utilitise
- Childlock : Off
- Timer
గTime : __ :__
గWake up : Off
గOn time : __:__
గProgram : Pr 1
గVolume : 20
5) Setup
- Auto Setup
గCountry : Great Britain
గStart
- Manual tuning
- Edit
2. Description of Service mode item
1. Heat Run item (S1 key)
1) S1 key : Heat Run (Full white screen)
2) S1 key : Heat Run (Original signal)
3) RECALL key : exit
2. Gumi Channel Setting item (S2 key)
1) S2 key : Channel (Kumi)
TGXXGT

2) RECALL key : exit
3. Volume item (S3 key)
1) S3 key : Volume < 0 > (min.)
2) S3 key : Volume < 30 > (midium)
3) S3 key : Volume < 63 > (max.)
4) S3 key : Volume < 63 > (right)
5) S3 key : Volume < 63 > (left)
6) RECALL key :exit
4. HDMI EDID Download item (S4 key)
1) S4 key : EDID Download <NO>
2) S4 key : EDID Download <YES>
3) RECALL key : exit
5. Dot-Defect inspection item (S5 key)
1) S5 key : RED Screen
2) S5 key : GREEN Screen
3) S5 key : BLUE Screen
4) S5 key : WHITE Screen
5) S5 key : BLACK Screen
6) S5 key : Original signal
7) RECALL key : exit
6. MDE(MPEC) Download Reset item (S6 key)
1) S6 key : MDE Download Reset <NO>
2) S6 key : MDE Download Reset <YES>
3) RECALL key : exit
7. Dempol Channel Setting item (S7 key)
1) S7 key : Channel (Dempol)
2) RECALL key : exit
8. White balance item (S8 key)
1) Cutoff Red < 0 >
2) Cutoff Green < 0 >
3) Cutoff Blue < 0 >
4) Whitedrv. Red < 768 >
5) Whietdrv. Green < 768 > (26"auo: 753, 32"auo: 745, 26" SEC, 32"SEC, 37"LPL: 768)
6) Whietdrv. Blue < 768 >
7) RECALL key : exit
* control : direction key
9. SUB-Bright item (S9 key)
1) S9 key : Subbright < 0 > ( -100 ~ +100 )
2) RECALL key : exit
* control : direction key
10. VCTP VER. and CPU stop item (S10 key)
TGXYGT

1) S10 key : svc. 060906 B3 (example)
2) RECALL key : exit
3) S10 key (4 times) : CPU off => Main power off : exit
11. Inch option item (S11 key)
* AUO, LPL PANEL
1) S11 key : Inch option <26"A>
2) S11 key : Inch option <37"L>
3) S11 key : Inch option <32"A>
4) RECALL key : exit
* SEC PANEL
1) S11 key : Inch option <26"S>
2) S11 key : Inch option <32"S>
3) RECALL key : exit
12. Shipping item (S12 key)
1) S12 key : Factory Out going
*Adjustment remote controller
User remote controller : R-55A01
Service remote controller : R-34SVC
3. White balance adjusting method.
1. Press the S1 button, heat-run the set in full-white mode more than 30 minutes.
2. Apply High/Low pattern of white balance tester to video input terminal(croma:off, reference:G)
3. Adjust picture mode to "normal"
4. Attach a sensor of white balance meter to the center of the screen.
5. Press S8, then the set entered white balance adjustment mode.
y
6. High beam(200cd) : adjust white balance by varying gain of R, B (G fixed)
and press menu key to change High beam pattern.
7. Low beam(50cd) : adjust white balance by varying offset R, B (G fixed)
* Coordinate of color is x= 275±10, y=285±10.
8. To exit from service mode, press S8, or turn off the TV.
oGs sGs
TGXZGT

6. Trouble Shooting
1. No signal : OSD is working but on images are displaying
TGX[GT

A. When “No signal” in CVBS (RF, AV1,AV2,AV3)
1) First check if other inputs are working
=>If other inputs are not working, replace MAIN PCB
2) Checking waveforms with Color Bar Pattern (Using the oscilloscope)
-Main TP (RF): CC561 near IC501 (Top)
-Main TP(AV1): LC730 near JP906 (Top), CC560 near IC501 (Top)
-Main TP(AV2): LC733 near JP907 (Top), CC559 near IC501 (Top)
-Main TP(AV3): LC701 near JP902 (Top), CC558 near IC501 (Top)
=> If all TP signal does not appear, replace MAIN PCB.
CVBS signal (CC561,CC560, CC559, CC558)
B. When “No Signal” in Y/C signal (S-Video)
1) First check if other inputs are working
=>If other inputs are not working, replace MAIN PCB
2) Checking waveforms with Color Bar Pattern (Using the oscilloscope)
-Main TP(Y signal): LC702 near JP901 (Top), CC555 near IC501 (Top)
-Main TP(C signal): LC703 near JP901 (Top), CC557 near IC501 (Top)
=> If all TP signal does not appear, replace MAIN PCB.
Y signal (LC702, CC555)
TGX\GT

C signal (LC703, CC557)
C. When “No Signal” in Y/Pb/Pr signal (Component)
1) First check if other inputs are working
=>If other inputs are not working, replace MAIN PCB
2) Checking waveforms with Color Bar Pattern (Using the oscilloscope)
-Main TP (COMP_Y): LC709, LC710 near JP904 (Top), CC592 near IC501 (Top)
-Main TP (COMP_Pb): LC711, LC712 near JP904 (Top), CC593 near IC501 (Top)
-Main TP (COMP1_Pr): LC713, LC714 near JP904 (Top), CC591 near IC501 (Top)
=> If all TP signal does not appear, replace MAIN PCB.
Y signal (CC592)
Pb signal (CC593)
TGX]GT

Pr Signal (CC591)
D. When “No Signal” in PC
1) First check if other inputs are working
=>If other inputs are not working, replace MAIN PCB
2) Second check IC705 (Sync switching IC) condition.
- 16 pin above 4.3V (IC B+)
- 9 pin is low
- 10 pin is low.
=> If other condition, replace MAIN PCB
3) Checking waveforms with Color Bar Pattern (Using the oscilloscope)
-Main TP(R signal): LC720, LC723 near JP909(Top), CC550 near IC501(Top)
-Main TP(G signal): LC721, LC724 near JP909(Top), CC549 near IC501(Top)
-Main TP(B signal): LC722, LC725 near JP909(Top), CC594 near IC501(Top)
-Main TP(H-Sync): LC736, RC797, IC705 13pin near JP909 (Top),
CC548 near IC501(Top)
-Main TP(V-Sync): LC735, RC798, IC705 3pin near JP909 (Top),
TGX^GT

CC585 near IC501(Top)
=> If all TP signal does not appear, replace MAIN PCB.
1024 X 768, 60Hz
R signal (CC550 near IC501)
G Signal (CC549 near IC501)
TGX_GT

B Signal (CC594 near IC501)
Horizontal sync (CC548 near IC501)
Vertical sync (CC585 near IC501)
TGX`GT