Kogan LET40T3 Service Manual Download Page 55

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Part

Name

Description

Phenomena

Failure Cause

Circuit

White Screen

B/L

normal,

only white screen display

Maybe caused by surge current and EDS

Black Screen

B/L

normal,

only Black screen display

FIIcker

Crosstalk

LCD Vcom imbalance

Abnormal Color

Only

color abormal

Capacitance improper bring crosstalk inside LCD pannel

Abnormal Color

Only

color abnormal

1.Chip lose action 2.IC short or jointion bad 3.Pannel and vsc connect bad

Service Manual

Model No.: LET40T3

Summary of Contents for LET40T3

Page 1: ...tempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death Kogan Group 2009 Qingdao Haier Electronics Co Ltd All rights reserved Unauthorized copying and distribution is ...

Page 2: ...sed in this manual 6 1 4 How to Read this Service Manual 7 1 4 1 Using icons 7 Chapter 2 Specification 2 1 Specification list 8 2 2 External pictures four faces 9 Chapter 3 Disassemble and Assemble 3 1 Remove the Stand 10 3 2 Remove the Power Cord 11 3 3 Remove the Back Cover 11 3 4 Remove the Mainboard 11 3 5 Remove the speaker 11 3 6 Remove the Keypad 12 3 7 Remove the Remote Control Board 12 3 ...

Page 3: ... know your TV 27 6 2 Get to know your remote control 28 Chapter 7 Electrical Parts 7 1 Block Diagram 29 7 2 Circuit Diagram 31 7 3 Wiring Connection Diagram 45 Chapter 8 Measurements and Adjustments 8 1 Service Mode 46 8 1 1 How to enter into Service Mode 46 8 1 2 How to exit 46 8 2 Measurements and Adjustments 46 8 2 1 The Main Menu 46 8 2 2 Video 47 8 2 3 Audio 48 8 2 4 Software UpDate 48 Chapte...

Page 4: ...r the service personnel to open the units and disassemble the units For example we need to describe properly how to avoid the possibility to get electrical shock from the live power supply or charged electrical parts even the power is off This symbol indicates that high voltage is present inside It is dangerous to make any kind of contact with any inside part of this product This symbol indicates ...

Page 5: ...mbly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 1 3 4 About lead free solder PbF This product is manufactured using lead free solder as a part of a movement within the consumer products industry at large to be environmentally responsible Lead free solder must be used in the servicing and repairing of this product 1 3 5 Use the ...

Page 6: ...se in this service manual lubrication of contacts is not required Capacitors may result in an explosion hazard 5 Do not defeat any plug socket B voltage interlocks with which receivers covered by this service manual might be equipped 6 Do not apply AC power to this instrument and or any of its electrical assemblies unless all solid state device heat sinks are correctly installed 7 Always connect t...

Page 7: ...ill be installed CAUTION Be sure no power is applied to the chassis or circuit and observe all other safety precautions 17 Minimize bodily motions when handling unpackaged replacement ES devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device 1 3 7 Orde...

Page 8: ...e but may nevertheless be valuable to the reader such as tips and tricks Caution A caution is used when there is danger that the reader through incorrect manipulation may damage equipment loose data get an unexpected result or has to restart part of a procedure Warning A warning is used when there is danger of personal injury Reference A reference guides the reader to other places in this binder o...

Page 9: ...6 ms Angel of view 178 Contrast 5000 1 Brightness 450cd m2 OSD language English etc Color system PAL SECAM Audio system BG DK I L Audio output power Built in W 8W 2 Audio output power outer W No Total power input W 120W Voltage range V 150 240V Power frequency Hz 50 60HZ Net weight KG 18 4 Gross weight KG 26 Net dimension MM 989 280 689 Packaged dimension MM 1360 290 760 ...

Page 10: ...Service Manual Model No LET40T3 9 2 2 External pictures four faces Front Side Left Side ...

Page 11: ... 1 Remove the Stand 1 Lay down the unit so that back cover faces upward 2 Remove the Five screws from the back cover which are indicated with the circles in the picture above 3 Remove the stand Service Manual Model No LET40T3 10 Back Side ...

Page 12: ...ower Cord Then remove the power cord Remove the screw indicated by the red circles in below picture Then remove the mainboard 3 4 Remove the Mainboard Remove the five screws indicated by the red circles in below picture 3 5 Remove the speaker Remove the screw indicated by the red circles in below picture Then remove the speaker Service Manual Model No LET40T3 11 ...

Page 13: ...he remote control board 3 7 Remove the Remote Control Board 3 9 Remove the indicator light The indicator light is buckled into the front frame remove the clasp indicated by the red circles in below picture Take out the indicator light 3 8 Remove the Stand backstop Remove the six screws indicated by the red circles in below picture Take out the stand backstop Service Manual Model No LET40T3 12 ...

Page 14: ...ponents 4 1 Board Location No Parts number Description A Board 0094001076AD LCD Panel B Board 0094001897 Power Board C Board DC19B0E0400M Mainboard 0090723445 4 2 Main Board Service Manual Model No LET40T3 13 CN4 CN8 CNB4 CN27 CNB3 CN5 CN10 ...

Page 15: ...ector CN27 Pin number Signal name 1 LOUT 2 LOUT 3 ROUT 4 ROUT 12V 5V Connector CN10 Keypad Connector CNB3 Pin number Signal name 1 12V 2 12V 3 GND 4 12V 5 GND 6 GND 7 5VSTB 8 9 GND 10 PW ON OFF 11 PB ADJUS 12 PB ON OFF Pin number Signal name 1 GND 2 KEY1 3 KEY0 4 3 3VS Rom connector CNB4 Pin number Signal name 1 5VS 2 IR 3 LED R 4 LED G 5 GND 4 3 Power Supply Board Service Manual Model No LET40T3 ...

Page 16: ... name 1 L 2 R CN2 Pin number Signal name 1 12V 2 12V 3 GND 4 12V 5 GND 6 GND 7 5VSTB 8 E PEM 9 GND 10 PW ON OFF 11 NC 12 PB ON OFF 4 4 LCD Panel CN3 Pin number Signal name 1 24V 2 24V 3 24V 4 24V 5 24V 6 GND 7 GND 8 GND 9 GND 10 GND 11 NC 12 BL ON OFF 13 STATUS 14 E PWM Service Manual Model No LET40T3 15 CN2 CN1 ...

Page 17: ... 1 st 5 th LVDS Signal 11 Rx1 0 P 1 st 5 th LVDS Signal 12 Rx1 1 N 1 st 5 th LVDS Signal 13 Rx1 1 P 1 st 5 th LVDS Signal 14 Rx1 2 N 1 st 5 th LVDS Signal 15 Rx1 2 P 1 st 5 th LVDS Signal 16 GND Ground 17 Rx1CLK 1 st 5 th LVDS Clock 18 Rx1CLK 1 st 5 th LVDS Clock 19 GND Ground 20 Rx1 3 N 1 st 5 th LVDS Signal 21 Rx1 3 P 1 st 5 th LVDS Signal 22 Rx1 4 N 1 st 5 th LVDS Signal 23 Rx1 4 P 1 st 5 th LV...

Page 18: ...gnal 29 Rx3 2 N 3 rd 7 th LVDS Signal 30 Rx3 2 P 3 rd 7 th LVDS Signal 31 GND Ground 32 Rx3CLK 3 rd 7 th LVDS Clock 33 Rx3CLK 3 rd 7 th LVDS Clock 34 GND Ground 35 Rx3 3 N 3 rd 7 th LVDS Signal 36 Rx3 3 P 3 rd 7 th LVDS Signal 37 Rx3 4 N 3 rd 7 th LVDS Signal 38 Rx3 4 P 3 rd 7 th LVDS Signal 39 GND Ground 40 NC NC 41 NC NC Service Manual Model No LET40T3 17 ...

Page 19: ...al 13 Rx2 1 P 2 nd 6 th LVDS Signal 14 Rx2 2 N 2 nd 6 th LVDS Signal 15 Rx2 2 P 2 nd 6 th LVDS Signal 16 GND Ground 17 Rx2CLK 2 nd 6 th LVDS Clock 18 Rx2CLK 2 nd 6 th LVDS Clock 19 GND Ground 20 Rx2 3 N 2 nd 6 th LVDS Signal 21 Rx2 3 P 2 nd 6 th LVDS Signal 22 Rx2 4 N 2 nd 6 th LVDS Signal 23 Rx2 4 P 2 nd 6 th LVDS Signal 24 GND Ground 25 Rx4 0 N 4 th 8 th LVDS Signal 26 Rx4 0 P 4 th 8 th LVDS Sig...

Page 20: ...K 4 th 8 th LVDS Clock 34 GND Ground 35 Rx4 3 N 4 th 8 th LVDS Signal 36 Rx4 3 P 4 th 8 th LVDS Signal 37 Rx4 4 N 4 th 8 th LVDS Signal 38 Rx4 4 P 4 th 8 th LVDS Signal 39 GND Ground 40 NC NC 41 NC NC 42 NC NC 43 NC NC 44 NC NC 45 LVDS_SEL HIGH 3 3V Normal LVDS Format LOW GND JEIDA LVDS Format 46 NC NC 47 NC NC 48 NC NC 49 NC NC 50 NC NC 51 NC NC Service Manual Model No LET40T3 19 ...

Page 21: ...Connection Connect one end of a coaxial cable not included to the ANT IN jack on the back of your TV DVD combo then connect the other end of the cable into the antenna or cable TV wall outlet To improve picture quality from an antenna in a poor signal area install a signal amplifier Service Manual Model No LET40T3 20 ...

Page 22: ...est for you VCR connection Connecting a VCR with a standard AV cable A standard AV connection provides good video and audio To connect a VCR with a standard AV cable 1 Make sure that your TV DVD combo and the VCR are turned off 2 Connect a standard AV cable not included to the VIDEO IN yellow and adjust R red and L white AUDIO jacks on the back of your TV DVD combo then connect the other end of th...

Page 23: ...hen press ENTER External Equipment Connections Connecting a component video device A component video device provides better video than an S Video connection To connect a component video device 1 Make sure that your TV DVD combo and the component video device are turned off 2 Connect a component video cable not included to the Pr Pb and V jades on the back of your TV DVD combo then connect the othe...

Page 24: ... came with the computer 2 Make sure that the computer and your TV DVD combo are turned off 3 Connect a VGA cable not supplied to the VGA IN jack on the back of yout TV DVD combo then connect the other end of the cable to the VGA jack on the computer 4 Connect an audio cable not included to the PC AUDIO IN on the back of your TV DVD combo then connect the other end of the cable to the AUDIO OUT jac...

Page 25: ...e quality adjust the output resolution of the source device to 1280x720p Select HDMI input source in input source option of Select Main source menu When the source device DVD player or Set Top Box supports DVI How To Connect 1 Connect the source device to HDMI port of this TV with a HDMI to DVI cable not supplied with this product 2 A separated audio connection is necessary 3 If the source device ...

Page 26: ...onnect a set of headphones to your set if you wish to watch a TV program without disturbing the other people in the room Plug a set of headphones into the 3 5mm mini jack socket on the rear panel of the set Note Prolonged use of headphones at a high volume may damage your hearing You will not receive sound from the speakers when you connect headphones to the system Service Manual Model No LET40T3 ...

Page 27: ...ed power cord only If the polarized AC cord does not fit into a non polarized AC outlet Do not attempt to file or cut the blade It is the user s responsibility to have an electrician replace the obsolete outlet If you cause a static discharge when touching the unit and the unit fails to function simply unplug the unit from the AC outlet and plug it back in The unit should return to normal operatio...

Page 28: ...Chapter 6 Operation Instructions 6 1 Get to know your TV Service Manual Model No LET40T3 27 ...

Page 29: ...28 6 2 Get to know your remote control Service Manual Model No LET40T3 ...

Page 30: ...2P 24C02 SPDIF OUT AP1117 ADJ VDD_DE INTEL CE6353 VCC PCMCIA AP1117 ADJ Ursa_ 1 8V 6M20 DDRII LCD PANNEL MST6M20 3 3V STA559BW 3 3V PCMCIA 3 3V MSD209 3 3V 7805 5V_TUNER TUNER MP1482 VDDC 1 26V MSD209 MP1482 USB 5V_USB MP1482 MST6M20 Ursa_VCC1 2V STA559BW STA533WF 5VSTB AP1117 3 3 3 3VSTB MCU 8202 E2P ROM 24C32 MSD209 DDRII Service Manual Model No LET40T3 29 ...

Page 31: ... r L R i n 2 L R i n 3 R G B i n 1 R G B i n 2 Y C i n 2 C V B S i n 2 C V B S ou t1 R G B i n 3 Y C i n 3 C V B S i n 3 C V B S ou t2 L R ou t1 IE C 9 5 8 T S d em u x L R ou t2 L R ou t3 RC4558 Y C i n 1 C V B S i n 1 L R i n 4 V IF S IF V IF S IF R X 0 R X 1 R X 2 U S B 2 0 S P I U A R T L V D S O D D L V D S E V E N 1 9 2 0 1 0 8 0 p 6 0 H z P an el MSD209 Service Manual Model No LET40T3 30 ...

Page 32: ... 12K_1 R79 NC L215 FB220 100mA R202 100R 1 2 3 V200 3904 C234 0 1uF R177 100 R543 10K R201 1K C205 0 1uF C213 2 2uF CA5 100uF 16V V204 3904 R92 0 V202 3904 R8 2 2K CA1 100uF 16V C214 2 2uF C245 0 1uF R212 2 2K R230 100 5VMst 5VMst 5VSTB VCC Panel 12V 12V 5V_TUNER 5VAIN 3 3VDD 5VMst 3 3AVDD VDDC AVDDL_DVI VDDC DDR2_1V8 VDDP 3 3VDD AVDD_MPLL AVDD_3 3 3 3AVDD AVDD_VIF AVDD_LPLL 3 3AVDD 3 3VDD 3 3VDD ...

Page 33: ...GA21x21 PCM_OE_N R315 1M C338 10uF PCM_WE_N PCM_REG_N R372 33 R354 4 7K PCM_WAIT_N PCM_RESET PCM_IRQA_N C306 20pF 1 2 3 4 CNB3 KEY PCM_CD_N PCM_CE_N C373 2 2uF C336 1nF PCM_IORD_N R374 100 R326 13K AVDDL_DVI R370 4 7K R311 4 7K SC1 VOUT PCM_IOWR_N Q27 NC 3904 XTAL_2O U1 XTAL_2I V1 HWreset U14 IRIN V10 INT GPIO4 V11 UART_TX DDCA_DAT P15 UART_RX DDCA_CLK P14 I2C_SDA DDCR_DAT Y15 I2C_SCL DDCR_CLK W15...

Page 34: ...16 56 B_UDQSM B_UDQSP A_MDATA 15 0 A_LDQSM A_LDQSP C411 0 1uF C412 4 7uF B_CKE B_MCLKZ B_MCLK B_WEZ B_MDATA 15 0 B_MADR 12 0 R1495 56 R1492 56 B_ODT B_BA1 B_RASZ B_BA0 B_CASZ R403 56 R414 56 A_MADR 12 0 B_LDQSM B_LDQSP B_UDQM B_LDQM 7 5 3 1 8 6 4 2 RN403 56RX4 R437 56 7 5 3 1 8 6 4 2 RN409 56RX4 R1490 56 R1493 1K_1 C423 10uF 6 3V C406 10uF 6 3V R417 56 R411 56 R435 56 R418 56 R436 56 R410 56 7 5 3...

Page 35: ...EC HDMI1 CLKP HDMI1 RX2P HDMI1 RX1P HDMI1 RX0N HDMI1 RX2N HDMI1 RX1N HDMI1 RX0P HDMI1 CLKN HDMI_HP1 180 Degree Connector 180 Degree Connector HDMI_HP2 HDMI_HP2 HDMI2 HPDIN HDMI CEC Close to MStar IC HDMI_HP3 HDMI3 HPDIN Close to MStar IC Close to MStar IC RX1B2N RX1B1N RX3B1N RX3BCLKN RX2BCLKP RX3B1P RX3B0P RX2B0P RX2B1N RX1B2P RX2B0N RX2B1P RX1BCLKN RX3B0N RX1BCLKP RX1B1P RX3BCLKP RX3B2N RX2B2N R...

Page 36: ...rt 5 10 4 9 3 8 2 7 1 15 14 13 12 11 6 16 17 CN20 VGA R608 100 R806 47 C605 560pF R609 100 C800 1nF C440 0 1uF R615 100 R619 10K C803 47nF R611 22K Z607 ESD C604 560pF R623 100 Z603 NC INPAQ Vport R838 75 C806 47nF R801 47 Z608 ESD Z606 ESD R617 10K Z600 NC INPAQ Vport Z604 NC INPAQ Vport 1 1 2 2 3 3 4 4 5 5 6 6 7 7 CN21 VGA R L R803 47 VGA 5V 5VAIN VGA 5V RGB0 YPbPr_B 2 RGB0 YPbPr_B 2 RGB0 YPbPr_...

Page 37: ... L705 0 R709 68 R449 8 2K R441 4 7K C1012 470uF 16V C723 NC 330pF R912 330 R630 10 C718 NC Z700 ESD R631 10 R450 10K V700 BC808 PNP MMBT3906 C713 100uF 16V R715 15K R442 10K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CN30 SCART C710 560pF R918 10K R632 75 Z705 ESD R399 100 R708 470 C314 1uF Z708 ESD R725 1 5K 12V 5VAIN 12V RGB1 VGA_B 2 SPDIF_OUT 2 SC1 VOUT 2 RGB1 VGA_G 2 RGB1 VGA_R 2 RGB1 VGA_SOG 2 AV...

Page 38: ... 4 5 5 6 6 7 7 CN11 HDTV_L R R703 470 C819 NC C809 560pF 1 2 Z805 ESD C705 47nF R830 12K C704 47nF L805 0 Z801 ESD 1 2 Z804 ESD R705 10 R826 75 HDTV Rin 2 RGB2 SCART_G 2 RGB2 SCART_B 2 RGB2 SCART_SOG 2 HDTV Lin 2 RGB2 SCART_R 2 HDTV R HDTV Rin HDTV Lin HDTV L HDTV R HDTV L HDTV_Pb HDTV_Pr HDTV_Y HDTV_Y HDTV_Pr HDTV_Pb HDTV YPbPr INPUT RGB2 SCART_SOG HDTV_PBIN HDTV_YIN Close to MStar IC RGB2 RINP R...

Page 39: ...02 10nF C1305 10nF C1308 0 1uF R1311 10 R1320 NC 0R C1304 NC 10nF R1306 NC 1 2K C1314 2 2uF R1318 1K C1311 10nF R1312 6 8K 1 3 2 V1301 2N7002 ING 2 OUT1 4 GND 3 OUT2 5 IN 1 SAW Z1300 K9659D Body 15 Body 16 RF_AGC 3 SCL 4 B2 6 SDA 5 DF1 11 IF_AGC 9 DF2 10 AIF 12 Body 14 Body 13 NC 1 B1 2 VTU_TP 7 AS 8 U1301 TDTC G501D R1307 39 R1313 3 3K C1312 0 1uF R1302 10K R1315 100 C1309 10nF C1310 100uF 16V R1...

Page 40: ...VDD 39 CVDD 37 CVDD 19 CVDD 7 VDD 54 VDD 45 VDD 13 VDD 2 N1200 ZL10353 R1204 4 7K L1200 FB 100mA C1205 0 1uF C1207 1uF R1200 10K R1217 4 7K C1204 0 1uF C1215 0 1uF C1218 NC 22pF R1205 33 C1214 0 1uF C1202 0 1uF R1210 200 C1226 2 2uF C1217 0 1uF R1208 100 7 5 3 1 8 6 4 2 RN1201 33RX4 R1211 4 7K C1223 2 2uF C1201 0 1uF 3 2 1 4 ADJ OUT IN N1202 AP1117 ADJ C1221 NC 22pF R1212 10K C1225 2 2uF L1201 FB ...

Page 41: ... D7 DEMOD2PCM_TSI D6 DEMOD2PCM_TSI D5 DEMOD2PCM_TSI D4 TS_MDO1 TS_MDO0 TS_MOSTART TS_MOVAL TS_MDO2 TS_MOCLK TS_MDO7 PCMCIA_A10 DEMOD_TS VALID PCM_D7 PCM_D6 PCM_D5 PCM_D4 PCM_D3 R1419 33 PCMCIA_A6 PCMCIA_A7 PCMCIA_A12 PCMCIA_A14 PCMCIA_A13 PCMCIA_A8 PCMCIA_A9 PCMCIA_A11 R1404 33 C1403 0 1uF R1447 33 PCMCIA_A0 PCMCIA_A1 PCMCIA_A2 PCMCIA_A3 PCMCIA_A4 PCMCIA_A5 C1400 0 1uF R1431 33 R1437 33 PCMCIA_D3 ...

Page 42: ...5 VCC 2 OUT 3 BST 1 GND 4 SS 8 COMP 6 U1304 MP1482 R9 2 7K_1 F3 FB R5 12K_1 CA2 100uF 16V C388 2 2uF C20 0 1uF C15 0 1uF Z1501 ESD_HDMI C5 10nF Z1500 ESD_HDMI R65 4 7K C21 10nF R221 100K D4 NC 1N5822 1 VCC 1 2 D 2 3 D 3 4 GND 4 SHIELD 5 SHIELD 6 CN9 USB 1 2 3 Q18 3904 CA4 470uF 16V R67 4 7K C1406 0 1uF C16 0 1uF USB CONNECTOR 12V 5V_USB USB0_D 2 3 3VDD 5V_USB USB1_SWITCH GPIO144 2 USB0_D 2 USB_D U...

Page 43: ...R396 47K C121 470nF R121 10 R498 12 C140 1uF C281 330pF 25V R334 22 1 2 DD59 ESD C110 0 1uF C283 100nF 25V 3 1 2 D18 BAV99 C109 10uF CA16 100uF 16V R1497 0 CA11 100uF 16V CA84 470uF 35V C100 0 1uF C366 2 2uF C258 100nF 25V R329 100 R306 10K 5 6 7 8 4 U1303B RC4558 C159 1uF R456 2 2M C291 100nF 25V R325 4 7K R346 22 Q15 3906 C244 100nF 25V C129 470nF R381 NC 0 R359 12 R549 10K 1 2 3 Q40 3904 R457 1...

Page 44: ...413 100nF C33 100nF C199 100nF C97 10uF C42 2 2uF C1416 100nF L10 FB 2A C77 100nF C91 100nF CA96 470uF 16V C1418 100nF C47 2 2uF C32 2 2uF C1409 10n C1410 0 1uF C1426 100nF C1412 0 1uF D20 NC 1N5822 C99 100nF C76 100nF CA21 100uF 25V C29 100nF C1425 100nF C96 100nF L13 FB 2A C1417 100nF C132 100nF C144 100nF L20 FB 2A C1411 1n L12 FB 2A C224 0 1uF VCC 2 EN 7 COMP 6 SS 8 GND 4 PAD 9 FB 5 BST 1 OUT ...

Page 45: ... 2 9 12 3V_SDA 2 BRT_CNTL_OUT 1 BRT_CNTL_IN 1 G1_RXE1 2 ODSEL2 2 3V_SCL 2 B3_RXE3 2 B0_RXE4 2 B6_RXE2 2 B2_RXE3 2 B5_RXEC 2 G0_RXE1 2 G3_RXE0 2 B4_RXEC 2 B7_RXE2 2 G2_RXE0 2 G5_RXO4 2 R0_RXOC 2 B1_RXE4 2 G4_RXO4 2 R2_RXO2 2 R5_RXO1 2 R4_RXO1 2 R7_RXO0 2 G7_RXO3 2 R3_RXO2 2 R6_RXO0 2 G6_RXO3 2 R1_RXOC 2 ODSEL1 I2CS_SDA Debug Port Ursa_PWM1 I2CS_SCL Ursa_GPIO8 CHIP_CONF GPIO8 PWM1 PWM0 CHIP_CONF 3 d...

Page 46: ...VDS Wire LVDS Wire Connection Wire 12V 5V Remote Control Board Assembly CN5 CN8 CN4 CN10 CN27 CNB3 CNB4 CNE2 CNE3 JP1 PD801 CNM801 CN2 CN1 Power Cord 0090400231 Connection Wire 12V 5V LVDS Wire LVDS Wire Speaker Wire Connection Wire Control Connection Wire Remote Connection Wire Lamp Connection Wire Lamp 0090401643 E 0090402750 0090402553 C 0090402848 0090402850 0090400647 J 0090402846 Service Man...

Page 47: ...e out the factory mode menu 8 2 Measurements and Adjustments 8 2 1 The Main Menu In factory mode menu press up down button to choose the up down item press left right button to the submenu press OK button to affirm press MENU button go to the next page MSD209 Factory Menu In this page you just consider RESET ALL function This function you can reset all date return to factory state if you encounter...

Page 48: ...o Color Temperature This page is control the Color Temperature and the picture size Picture Mode This page is control the picture effect like Brightness contrast color sharpness Service Manual Model No LET40T3 47 ...

Page 49: ...z In this page you just consider the software update function Plug USB into the 1st USB port select SOFTWARE UPDATE press OK Then flip the other window perss OK The update is going work NOTE After software update turn to the Factory Setting 1 page reset all Service Manual Model No LET40T3 48 ...

Page 50: ...ify if correct channel is selected Adjust the antenna Make adjustments by Fine Tune and MANUAL Scan No color for some channel program black and white Verify if the same problem exists in other channels check out of picture and sound system Refer to relative instructions in the Manual for color adjust Spots with some or all pictures Verify if the antennal is correctly connected Verify if the antenn...

Page 51: ...nF C160 0 1uF C121 470nF C140 1uF C281 330pF 25V R334 22 C283 100nF 25V CA84 470uF 35V C100 0 1uF C258 100nF 25V R329 100 R306 10K C291 100nF 25V R346 22 C244 100nF 25V R359 12 R494 12 C79 0 1uF L31 600 4 5X3 2 C117 680pF GND_SUB 1 SA 2 TEST_MODE 3 VSS 4 VCC_REG 5 OUT2B 6 GND2 7 VCC2 8 OUT2A 9 OUT1B 10 VCC1 11 GND1 12 OUT1A 13 GND_REG 14 VDD 15 CONFIG 16 OUT3B DDX3B 17 OUT3A DDX3A 18 EAPD OUT4B 19...

Page 52: ... B D Source Re soldering or change IC U13 Check the input output Of IC U55 of Main B D Source Re soldering or change IC U55 Check the input output Of IC U2 of Main B D Source Re soldering or change IC U2 Check the Speaker Change the Speaker Check the Sperker wire Fail Pass Fail Fail Fail Fail Pass Pass Pass Pass Service Manual Model No LET40T3 51 ...

Page 53: ... Sunken TCP lead cracking ACF bonding short Awful environment and something electric enter into LCD Mis align between TCP and Panel Panel failure TCP failure V Dim Vertal gray line V L D Vertical color line light or dark forever H B D Horizontal bar H Dim Horizontal gary line H L D Horizontal line light or dark forever Service Manual Model No LET40T3 52 ...

Page 54: ...er Bladder between Polarizer and top glass Polarizer Scratch Polarizer Scratch Tine or rigidity arose F inside Polarizer Eyewinker inside Polarizer Eyewinker inside Polarizer Circuit Abnormal Display Abnormal Display 1 Chip lose action 2 IC ahort or jointiog bad 3 Pannel and vsc connect bad Flashing Bright and dark display alternately Service Manual Model No LET40T3 53 ...

Page 55: ...ent and EDS Black Screen B L normal only Black screen display FIIcker Crosstalk LCD Vcom imbalance Abnormal Color Only color abormal Capacitance improper bring crosstalk inside LCD pannel Abnormal Color Only color abnormal 1 Chip lose action 2 IC short or jointion bad 3 Pannel and vsc connect bad Service Manual Model No LET40T3 54 ...

Page 56: ...wire and electrode B L dark B L brightness darker than normal Connect badnessShort between wire and electrode B L wire damaged B L wire damaged Operation abnormal or systemic noise B L wire open Without backlight Operation abnormal or systemic noise B L shut down B L shutdown in sometime Short bitween lamp housing and wire Because consume power too much F M F M inB L white balck Rotundity or wirel...

Page 57: ...lcal or B L Light leakage Brightness at bottom of LCM brighter than normal B L unit badness Uniformity B L brightness asymmetric Sheet in B L unit is uneven Mount hole Lack screw or screw damage Lack screw Screw damage Service Manual Model No LET40T3 56 ...

Page 58: ...Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China http www haier com Printed in China ...

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