Daewoo EX236E2BCFA Service Manual
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Daewoo EX236E2BCFA Service Manual

Daewoo EX236E2BCFA Service Manual

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Service Manual

LED TV
CHASSIS :
SE-V26XB
Model :
EX236E2BCFA
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.
S/M NO. :

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Summary of Contents for Daewoo EX236E2BCFA

  • Page 1: Service Manual

    LED TV CHASSIS : SE-V26XB Model : EX236E2BCFA 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.

  • Page 2: Table Of Contents

    Contents Safety Precaution ....Preliminary Troubleshooting ..........................4 LT908D(South America) Specification ........5 LT716B-1 (South America) Specification ...................... 12 Product Specification ...... 19 Service Remote Controller ......21 Block Diagram ....22 LT908X Trouble shooting ..........................23 LT716X Trouble shooting ..........................31 Schematic .....

  • Page 3: Safety Precaution

    1. Safety Precaution When moving or laying down a LCD Set, at least two people must work together. Avoid any impact towards the LCD Set. 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.

  • Page 4: Preliminary Troubleshooting

    2. Preliminary Troubleshooting 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. Sound is discontinuous or broken sometimes. Check if [SOUND] -> [Bass] is Min or Max. Set the [SOUND] ->...
  • Page 5 3. SPECIFICATION 1) GENERAL DESCRIPTION The board is a multi-purpose LCD/LED TV control board which can support LCD/LED panel with dual/single LVDS interface. It supports resolution up to 1920x1080. The board supports CC, Vchip, MTS, Component, HDMI, PC-RGB, CVBS, S-Video and analog TV.
  • Page 6 standby < 0.6W Come Filter Deinterlace Weak signal enhancement Noise reduction...
  • Page 7 MENU, CH+, CH-, VOL+, VOL-, INPUT, POWER Key Function 1 F-Connector 75ft Terminlas Input HDMI 1 HDMI terminal PC-RGB 1 D-SUB 15Pin terminal CVBS 1 RCA terminal Component 3 RCA terminals 2 RCA terminals CVBS Audio Component Audio PC-RGB Audio 1 Earphone terminal Earphone 1 Earphone terminal...

  • Page 8: Front View

    4) FUNCTION LAYOUT TOP VIEW CN19 : CN14 : CN17 : LVDS CN15 : Interface CN24 : CN3 : CN2 : CN26 : CN20 : Coaxial : Inverter Speaker FRONT VIEW DC Power HDMI In PC-RGB PC Audio CVBS Ear- Coaxial phone Monitor Output...
  • Page 9 5) Connector Specification ♦ CN3(6PIN/2.0): INVERTER CONNECTOR SYMBOL DESCRIPTION + 12V DC Power Supply Back-Light ON/OFF Control for Panel Brightness Adjustment for Panel Ground ♦ CN17(2x15PIN/2.0): LVDS INTERFACE SYMBOL DESCRIPTION VSEL Power Supply for Panel VSEL VSEL Ground RXO0- LVDS ODD 0- Signal RXO0+ LVDS ODD 0+ Signal RXO1-...
  • Page 10 RXE2+ LVDS EVEN 2+ Signal 25/26 Ground RXEC- LVDS EVEN Clock- Signal RXEC+ LVDS EVEN Clock+ Signal RXE3- LVDS EVEN 3- Signal RXE3+ LVDS EVEN 3+ Signal ♦ CN19(14PIN/2.0): KEY & IR BOARD CONNECTOR SYMBOL DESCRIPTION + 5V DC Power Supply Red Indicator Green Indicator IR Receiver...

  • Page 11: Product Specification

    4. Product Specification Available Input Signal i) TV Mode Color Standard : NTCS, PAL-M/N Reception Channel : Ch 2-13 (VHF), Ch 14-69 (UHF), Ch 1, 14~125(Cable) Sound Transmission System : FM Mono, 2 Carrier IF & Subcarrier:...

  • Page 12: Trouble Shooting

    PIF : 45.75MHz SIF : 41.25MHz Sound Subcarrier: 4.5MHz, 4.72 MHz Color Subcarrier: 3.58MHz ii) Multimedia Mode Resolution V-freq HDMI PC(D-Sub) Component Standard 640 X 480 60Hz Industry Standard 800 X 600 60Hz VESA Guidelines 1024 X 768 60Hz VESA Guidelines 1280 X 1024 60Hz VESA Standard...
  • Page 13 一 一 一 一 、 、 、 、 一 一 一 一 、 、 、 、 Power supply Trouble Power supply Trouble Whether CN2 or CN12 is +5V? Whether power board Make sure the power board power on and check the 2th of U4 input 5v voltage ,or input voltage is 5V is 3.3v?
  • Page 14 二 二 二 二 、 、 、 、 Display Trouble （ （ （ （ flower screen flower screen flower screen flower screen） ） ） ） Display Trouble Flower screen Whether the driver-lcd wire contact ok? Is LCD OK? Check output network (eg. U14 driver-lcd) Change the driever-lcd wire Check the circuit of U14 Repair this circuit...
  • Page 15 三 三 三 三 、 、 、 、 Display Trouble （ （ （ （ white screen） ） ） ） Display Trouble White screen Is driver-lcd voltage normal? (decided by using screen) Q8/AO3401’s G-pole voltage Whether U14 has signal output? (3.3V～0Vor5V~0) LCD damage Check circuit of U14 pins Change U14...
  • Page 16 四 四 四 四 、 、 、 、 Display Trouble （ （ （ （ black screen） ） ） ） Display Trouble Black screen Whether the BLON of CN3 has 5V? Is inverter power is normal? Check the circuit from BLON pin to U14 or U14 I/O damage (pin 67) Check and repair power supply Inverter power damage...
  • Page 17 五 五 五 五 、 、 、 、 Audio Trouble Audio Trouble（ （ （ （ no sound no sound） ） ） ） Audio Trouble Audio Trouble no sound no sound No Sound Whether the audio signal input Whether Volume, MUTE setting is normal U1's 11th and 6th pin Whether there is signal output check the 7th pin of U21/TDA1517P, Whether there is more than 11V power supply...
  • Page 18 六 六 六 六 、 、 、 、 Function Trouble Function Trouble Function Trouble Function Trouble（ （ （ （ TV video TV video TV video） ） ） ） TV video TV NO scan or no picture whether the external input signal is normal? check the 7 pin of t1,whether it is 5V whether the 4...
  • Page 19 七 七 七 七 、 、 、 、 Function Trouble Function Trouble Function Trouble（ （ （ （ TV audio Function Trouble TV audio TV audio） ） ） ） TV audio TV no sound but has pictures whether it has sound ? when using PC Whether the 1th, 2th pins of SAW1 have signal? 1.
  • Page 20 八 八 八 八 、 、 、 、 Function Trouble Function Trouble Function Trouble（ （ （ （ PC PC PC PC） ） ） ） Function Trouble Under PC channel Low color, Picture is not center No signal Image Stabilization color cast whether R.G.B input signal Whether VS,HS signal are of U14 is normal?
  • Page 21 九 九 九 九 、 、 、 、 Function Trouble Function Trouble Function Trouble（ （ （ （ YPbPr Function Trouble YPbPr YPbPr、 、 、 、 HDMI YPbPr HDMI HDMI HDMI） ） ） ） VGA RGB .YPbPr. HDMI,S-VIDEO,CVBS HDMI,S-VIDEO Low color, CVBS has no signal Have no signal color cast...

  • Page 22: Schematic

    6. Schematics...
  • Page 23 根据客户不同的内置电源输出的电压，增加删除修改项非常复杂 详见功能增加删出修改项列表 CN24 BL ON +5V_STB PWON NC/6PIN-2.0-D-H-G NC/10PIN-2.0-D-H-G +5V_STB R347 PWON C299 R348 R349 NC/47Kohm-0402-±5%-1/16W R350 STB_ON NC/D-MMBT3904-7-F NC/510ohm-0402-±5%-1/16W NC/10Kohm-0402-±5%-1/16W NC/PMBT3906 NC/4K7ohm-0402-±5%-1/16W NC/0.1uF-0402-Y5V-+80%-20%-25V 3F.3150212021ZLQGMV R384 0.1uF-0402-Y5V-+80%-20%-25V 470uF-25V-±20%-10*13 － 105 ℃ I = 14mA 0ohm-0402-±5%-1/16W 0.1uF-0402-Y5V-+80%-20%-25V [STB] 0.1uF-0402-Y5V-+80%-20%-25V +12V +5V_SW R383 +12VOFF NC/0ohm-0402-±5%-1/16W...
  • Page 24 PC_RIN 0ohm-0402-±5%-1/16W GZ1005D600T(F) R376 NC/0ohm-1206-±5%-1/4W R366 NC/BAT54C-215 10Kohm-0402-±5%-1/16W DVD_+5V DVD 部分 10Kohm-0402-±5%-1/16W NC/33ohm-0402-±5%-1/16W 75ohm-0402-±5%-1/16W +5V_SW TXD/ 0ohm-0402-±5%-1/16W 10pF-0402-NPO-±5%-50V NC/ICVL0518030FR AO3401A R153 R337 DVD_R_IN DVD_RI VGA_5V R154 VGA_TX VGA_Rin 5K1ohm-0402-±5%-1/16W /// NC/ 8K2ohm-0402-±5%-1/16W +5V_SW +5V_AUD DVD_ON R121 10Kohm-0402-±5%-1/16W 8K2ohm-0402-±5%-1/16W /// NC/12Kohm-0402-±5%-1/16W C100 VGA_SDA VGA_SDA'...
  • Page 25 HDMI_5V HDMI+5V CN16 R173 R174 RX_HOTPLUG HDMI_5V HDMI_SDA R175 HPD_CON HDMI_SCL 10Kohm-0402-±5%-1/16W RXC- R292 RXC-' 10Kohm-0402-±5%-1/16W RXC- PMBT3904 10ohm-0402-±5%-1/16W 1Kohm-0402-±5%-1/16W RXC+ R293 RXC+' RXC+ RX0- 10ohm-0402-±5%-1/16W RX0- R294 RX0-' RX0+ RX1- 10ohm-0402-±5%-1/16W RX0+ R340 RX0+' RX1+ RX2- 10ohm-0402-±5%-1/16W RX1- R351 RX1-' RX2+ 10ohm-0402-±5%-1/16W...
  • Page 26 27pF-0402-NPO-±5%-50V 27pF-0402-NPO-±5%-50V 14.318MHz-±30PPM-20PF-HC-49S +3.3V_STB 1Mohm-0402-±5%-1/16W 470ohm-0402-±5%-1/16W HWRESET R180 SGM810-SXN3L /// NC/STL8110GCH300 C229 C230 15mA 100Kohm-0402-±5%-1/16W R181 255mA 380mA 56mA 0.1uF-0402-Y5V-+80%-20%-25V R182 AVDD_AU 1uF-0603-Y5V-+80%-20%-10V VDDP_PM AVDDA VDDC_1.26V VDDP AVDD_VIF 145mA AVDD_MPLL C231 CN17 VCC-Panel VCC-Panel VCC-Panel 个别 Panel 需要 I2C 时： TXODD0N TXODD0P 4*22ohm-0603-±5%-1/16W...
  • Page 27 150ohm-0402-±5%-1/16W NC/100ohm-0402-±5%-1/16W 0.1uF-0402-Y5V-+80%-20%-25V 6K8ohm-0402-±5%-1/16W R115 100uF-16V-±20%-6*5.4-105 ℃ +12VOFF 1Kohm-0402-±5%-1/16W 56ohm-0402-±5%-1/16W 200mA 0.01uF-0402-X7R-±10%-50V SAW1 R236 +5V_SW 5VTV 680ohm-0402-±5%-1/16W C288 SDFL1608LR82KT(F) EC0410-101K-R-L-F C137 C138 R237 470uF-16V-±20%-8*12 － 105 ℃ 0.1uF-0402-Y5V-+80%-20%-25V R311 2SC3779D 0.1uF-0402-Y5V-+80%-20%-25V NC/PMBT3904 R239 22ohm-0402-±5%-1/16W SIF2 C264 SIF1 C265 R240 ATV_IF C266 HDAF389A7Dc 0.01uF-0402-X7R-±10%-50V...
  • Page 28 R257 IC MUTE +12VOFF AMP_MUTE R258 YD1517P 10Kohm-0402-±5%-1/16W PMBT3904 4K7ohm-0402-±5%-1/16W 10Kohm-0402-±5%-1/16W Comment: 22uF-16V-±20%-4*5.4-105 ℃ IC MUTE + E14 +12VOFF 1Kohm-0402-±5%-1/16W C267 1Kohm-0402-±5%-1/16W 100uF-16V-±20%-6*5.4-105 ℃ Amp_Rin R254 C268 470uF-16V-±20%-8*12 － 105 ℃ 470uF-16V-±20%-8*12 － 105 ℃ Amp_Lin R256 C269 C270 C271 C272 C273 CN20...

  • Page 29: Software Upgrade Method

    7. Software upgrade SW Upgrade Manual Hardware connected: 1.1 Connect the USB ISP tool to USB port of PC, then install driver. 1.2 For board upgrade, Connect the USB ISP tool and blue CN18 of main board with 4pin cable as below picture. 1.3 For CBU upgrade, Connect the USB ISP tool to VGA board with 4pin cable, then plug the VGA board to main board.
  • Page 30 Note: Please use the VGA upgrade method generally. Please check carefully the connection of TXD and RXD between upgrade board and VGA board. 2. Upgrade step: 1. Run the ISP_Tool.exe on your computer as below picture. 2.1 Check the Config parameter as below.
  • Page 31 2.2 Press “Read” to choose burning file as below picture. 2.3 Open the burning file(*.bin).
  • Page 32 2.4 Power on, press “Connect” to connect the main board. 2.4.1 If connect success, picture will be as below. Press “OK” continue. 2.4.2 If connect fail, picture will be as below. Press “OK” check. 2.4.2.1 Check tool connect and driver install of USB ISP tool first. 2.4.2.2 Check the power connect and power on.
  • Page 33 2.4.3.1 Burning, Please wait 2.4.3.2 Burn finished. Pease power off, then power on. 2. If burn fail, please retry again from 2.4 step.

  • Page 34: Service Part List

    8. Service Part List Part Code PART NAME DESCRIPTION ZZ100 40SA240001 REMOTE CONTROL SE-V26XB KA45 ZZ110 PTACPWG716 ACCESSORY AS EX236E2BCFA M861 40SA240008 MANUAL INSTRUCTION SE-V26XB MANUAL INSTRUCTI PWC1 40SA240006 CORD POWER SE-V26XB 1 METER 2 PIN ZZ120 PTBCSHG716 COVER BACK AS...
  • Page 35 40SA240029 SEALED PVC SE-V26XB SEALED PVC PM001 4850M051PC MODULE PCB SE-V26XB EX236E2BCFA MAIN ZZ310 PTSBSWG716 PCB SUB AS EX236E2BCFA PM001 4850M052PC MODULE PCB SE-V26XB EX236E2BCFA IR ZZ320 PTAKSWG716 PCB A/V KEY AS EX236E2BCFA PM001 4850M053PC MODULE PCB SE-V26XB EX236E2BCFA KEY...

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