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CONTENTS

Safety instructions………………………………………………………………………..…

Adjustment instructions …………………………….…….…………………………….…

Trouble shooting ……………………………………………………….……………………

Working principle analysis……………………………………………………….………….

Block diagram…………………………………..……………….……………….…………

IC block diagram………………………………………………………………………..……

Main assembly……………………………………………………………………………..…

Identification criteria for the bright spot and dark spot of the LCD screen………..….

Wiring diagram ……………………………………………………………..……………...

Troubleshooting charts………………………………………………………………..……

Schematic diagram (CPU and TV board) ……………………………………………..……

Schematic diagram ( power supply board)………………….…....................................

APPENDIX: EXPLODED VIEW

PART LIST

Содержание LC27U7D

Страница 1: ...LCD TELEVISION LC27U7D...

Страница 2: ...Block diagram IC block diagram Main assembly Identification criteria for the bright spot and dark spot of the LCD screen Wiring diagram Troubleshooting charts Schematic diagram CPU and TV board Schem...

Страница 3: ...will result 2 5 If any foreign substance such as water liquid metal slices or other matters happens to fall into the module be sure to cut the power off immediately and do not move anything on the mod...

Страница 4: ...of picture residue on the screen as commonly called ghost shadow The extent of the residual picture varies with the maker of LCD screen This phenomenon doesn t represent failure This ghost shadow may...

Страница 5: ...to select adjustment items and press VOL and VOL to adjust value items press MENU to exit Note the white balance adjustment should be done under nature picture mode 3 1 Initialization Enter factory me...

Страница 6: ...1280 1024 60Hz 3 3 2 Sub brightness and White balance adjustment VGA HDMI channel a Input VG 849 or VG 848 signal of VGA PROG852 640 480 75Hz and eighth level gray scale signal of PATTERN Use color an...

Страница 7: ...gnal let the color coordinate of the second level and the seventh level 285 and 293 3 5 VIDEO channel adjustment TV VIDEO S VIDEO a Connect color bar signal of AV PM5518 NTSC eight level gray scale si...

Страница 8: ...to the connector There appear streaks or light color on the screen Check if interfered by other equipment and if interfered possibly by the equipment like transmitting antenna non professional radio...

Страница 9: ...if the input mode is correct There appears an indication outside the receivable scope Check if the TV set can receive input signal The signal is not correctly identified and VGA format is beyond the...

Страница 10: ...and HDMI send to N101 N101 MST6151 is many function big dimension integrate circuit it processed HDMI A D to DA switch interlaced and non interlaced processing model switch and low voltage difference...

Страница 11: ...L R BUS SCALER A D D A DEINTERLACER LVDS HDMI N101 CPU MST6151DA VIDEO DECORDER N601 TVP5147PFP MCU N801 MTV412 SDRAM N201 SDRAM N202 SIF DEC N201 LA72700 AUDIO PROCESSOR N301 R2S15900SP AUDIO AMP N4...

Страница 12: ...1_C VI_2_A VI_2_B VI_2_C VI_3_A VI_3_B VI_3_C VI_4_A CVBS Y CVBS C Pb CVBS C Pr CVBS Y CVBS Y Analog Front End Sampling Clock GPIO HS CS VS VBLK FID AVID XTAL1 XTAL2 DATACLK RESETB GLCO PWDN SCL SDA Y...

Страница 13: ...11 M52760 2 AFT 3 AGC 4 5 picture If input 7 sound IF input 13 SIF output 10 mono sound output 18 TV VIDEO output 14 17 5V 1 power supply...

Страница 14: ...12 LA72700 5 SIF input 25 TV sound R output 26 TV sound L output 11 SDA 12 SCL 31 9Vpower supply...

Страница 15: ...H sync input 19 VGA V sync input 27 28 PB input 29 30 Y input 31 HDMI G input 32 33 PR input 54 61 CCIR656 format signal input 53 CLK input 164 171 174 4 difference signal output 160 161 1 clock signa...

Страница 16: ...C GND LVA0M LVA0P LVA1M LVA1P LVA2M LVA2P LVACKM LVACKP GND VDDP LVA3M LVA3P GND BYPASS GND DVI_R DVI_R GND GND DVI_G DVI_G AVDD_DVI DVI_B DVI_CK AVDD_DVI AVDD_PLL DDCD_DA GND HSYNC1 BIN1P BIN1M DVI_B...

Страница 17: ...nd for Analog Blue Input from Channel 0 27 BIN0P Analog Input Analog Blue Input from Channel 0 28 GIN0M Analog Input Reference Ground for Analog Green Input from Channel 0 29 GIN0P Analog Input Analog...

Страница 18: ...Output Audio Master Clock Output 188 AUSD Output Audio Serial Data Output 4mA driving strength 189 AUSCK Output Audio Serial Clock Output 4mA driving strength 190 AUWS Output Word Select Output 4mA d...

Страница 19: ...Link Positive LVDS Differential Data Output 178 LVB3M Output B Link Negative LVDS Differential Data Output 175 LVB3P Output B Link Positive LVDS Differential Data Output 174 LVBCKM Output B Link Negat...

Страница 20: ...03 XOUT Crystal Oscillator Output Crystal Oscillator Output 202 DDCD_DA I O w 5V tolerant HDCP Serial Bus Data DDC data of DVI port 4mA driving strength 14 DDCD_CK Input w 5V Tolerant HDCP Serial Bus...

Страница 21: ...19 Pin Name Pin Type Function Pin GND Ground Ground 1 7 13 16 35 50 64 65 80 87 103 108 114 126 132 140 155 157 159 163 172 183 184 194 205 206...

Страница 22: ...20 R2S15900 2 input L of AV1 27 input R of AV1 3 input L of AV2 S 26 input R of AV2 S 4 input L of YPBPR VGA HDMI 25 input R of YPBPR VGA HDMI...

Страница 23: ...TV 24 input R of TV 6 output L of AVOUT 23 output R of AVOUT 11 L output 19 R output 18 SCL 17 SDA 28 9Vpower supply TPA3008 1 MUTE 3 R input 5 L input 20 17 L input 41 44 R input 15 23 33 39 and 47 1...

Страница 24: ...1 N801 MST6151DA 353 61510 10 TVP5147 353 51470 10 CS4340 353 43400 30 MTV412 353 04120 10 Keypad board 667 L27U6 05 Remote control 301 RL27U6 27M RC R27M MODEL LC 23U7 203 L27U70 01 LC 23U7 203 L27U7...

Страница 25: ...mm 5mm Total defected point 8 7 5 4 Notes 1 Definition of defected point bright spot dark spot It is identified as a defected point if its area exceeds 1 2 of a single picture element R G B 2 Definiti...

Страница 26: ...24 Wiring diagram...

Страница 27: ...d is normal Check STANDBY circuit of power supply board Press POWER button in the unit button and sensor control check the indicator Check if the PIN12 of X503 in CPU board is high level Check if the...

Страница 28: ...then turn off the TV turn on again display picture Adjust CPU board again Which is no signal of channels Replacing CPU board Check if 1VPP signal and noise wave of X12 PIN 1 in the TV board Check if...

Страница 29: ...1 is normal Check power supply Check PIN11 and PIN19 output wave of N301 Check PIN25 and PIN26 output wave of N201 Check PIN5 wave of N201 Check PIN11 wave of TUNER1 Replacing N401 Replacing N301 Repl...

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Страница 41: ...LC 23U7 AND LC 27U7 POWER SUPPLY BOARD...

Страница 42: ......

Страница 43: ...00 6 POWER BOARD ASSY 667 L27U6 20 7 8 POWER SOCKET BRACKET 870 20955 AF0 9 VIDEO PROCESSING BOARD 667 L27U6 40 10 DISPLAY SCREEN 335 27001 00 11 SPEAKER ASSY 615 20453 00 12 FRONT CABINET 780 T07W0JA...

Страница 44: ...INE BLUE GREEN RED 665 D0002 422 VIDEO LINE YELLOW WHITE RED 665 D0002 570 LVDS LINE 30 PINS300mm FERRITE BEAD 666 21301 00 CLASPER ZCAT1325 0530A 700 60215 100 LED COLUMN MOLD TRANSPARENT GREY 0A 742...

Страница 45: ...D Zn 852 53006 81 SCREW SJ2830 M3X6 D Zn 852 53012 81 SCREW SJ2830 M3X12 D Zn 852 53012 81 SCREW SJ2830 M3X12 D Zn 852 54010 84 SCREW SJ2830 M4X10 Y 852 54010 84 SCREW SJ2830 M4X10 Y 852 54010 84 SCRE...

Страница 46: ...00A WALL MOUNT ASS Y 855 C4030 00 SCREW 4X30 855 B0016 00 EXPANDING BOLT M8X72 852 34008 81 SCREW B M4X8 D Zn 615 10429 AR0 HOLDER ASS Y DZ 1527 BLACK 615 10368 00A AXLETREE ASS Y 742 30073 020 TIE MO...

Страница 47: ...ON RESISTOR 1 6W 1K J R5 467 1C247 H03 CARBON RESISTOR 1 6W 4 7K J R3 467 1C247 H03 CARBON RESISTOR 1 6W 4 7K J R6 467 1C315 H03 CARBON RESISTOR 1 6W 15K J R7 998 JUMPER WIRE R1 998 JUMPER WIRE R4 782...

Страница 48: ...340 00168 00 DIODE UF4007 D912 340 00420 00 DIODE SR204 D908 340 00345 00 DIODE P6KE200A D906 467 2F210 H0C METAL RESISTOR 1W 1K JL R960 340 00376 00 DIODE MUR860 D903 340 00422 00 DIODE MBR20200CT D...

Страница 49: ...R940 R94 467 2G310 H0 METAL RESISTOR 2W 10k JL 467 5HB22 HA CEMENT RESISTOR RX27 6 3W 0 22 J R942 467 5HB22 HA CEMENT RESISTOR RX27 6 3W 0 22 J R911 467 7E491 H0A VITREOUS ENAMEL RESISTOR RI40 1 2W 91...

Страница 50: ...1 1 8W 2 2K J R925 455 22230 F2 SMD RESISTOR RC 05K3091FT R954 455 22230 H0 SMD RESISTOR RC11 1 8W 3K J R914 455 22247 H0 SMD RESISTOR RC11 1 8W 4 7K J R917 455 22247 H0 SMD RESISTOR RC11 1 8W 4 7K J...

Страница 51: ...782 L27M6 200A POWER PCB 998 JUMPER WIRE J901 998 JUMPER WIRE J902 998 JUMPER WIRE J903 998 JUMPER WIRE J904 998 JUMPER WIRE J905 998 JUMPER WIRE J906 998 JUMPER WIRE J907 998 JUMPER WIRE J908 998 JUM...

Страница 52: ...L0606SKI 101J L506 471 2122K 10 PEAKING COIL LGA0410 220uH K L105 464 6C810 M0 ELECTROLYTIC CAPACITOR CD110 10V 1000uF M C510 464 6C810 M0 ELECTROLYTIC CAPACITOR CD110 10V 1000uF M C111 464 6C810 M0 E...

Страница 53: ...STOR BC847AW V204 342 08570 90 SMD TRANSISTOR BC857 AW V101 342 08570 90 SMD TRANSISTOR BC857 AW V107 342 08570 90 SMD TRANSISTOR BC857 AW V401 353 15900 10 SMD ICR2S15900SP N301 353 15010 50 SMD ICAP...

Страница 54: ...SMD RESISTOR FTR0603222JR R205 455 12224 H0 SMD RESISTOR FTR0603242JR R125 455 12227 H0 SMD RESISTOR FTR0603272JR R117 455 12227 H0 SMD RESISTOR FTR0603272JR R162 455 12239 H0 SMD RESISTOR FTR0603392...

Страница 55: ...09 455 12415 H0 SMD RESISTOR FTR0603154JR R111 455 12415 H0 SMD RESISTOR FTR0603154JR R112 455 12427 H0 SMD RESISTOR FTR0603274JR R113 455 12456 H0 SMD RESISTOR FTR0603564JR R141 456 2210K B1 SMD CAPA...

Страница 56: ...APACITOR 06032E104M250BA C436 456 2410M C1 SMD CAPACITOR 06032E104M250BA C437 456 2410M C1 SMD CAPACITOR 06032E104M250BA C442 456 2410M C1 SMD CAPACITOR 06032E104M250BA C221 456 2422M C1 SMD CAPACITOR...

Страница 57: ...FERRITE BEAD STPB3216 380PT L404 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L405 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L408 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L409 666 13207 00 SMD...

Страница 58: ...464 6D610 M02 ELECTROLYTIC CAPACITOR CD110 16V 10uF M C116 464 6D610 M02 ELECTROLYTIC CAPACITOR CD110 16V 10uF M C124 464 6D610 M02 ELECTROLYTIC CAPACITOR CD110 16V 10uF M C127 464 6D610 M02 ELECTROLY...

Страница 59: ...9LT1 DH10 340 00289 00 SMD DIODE BAV99LT1 DH11 340 00372 00 SMD DIODE MMBD1204 DH12 340 00372 00 SMD DIODE MMBD1204 DD08 342 01440 10 SMD TRANSISTOR DTC144EKA VB01 342 01440 10 SMD TRANSISTOR DTC144EK...

Страница 60: ...802 455 12022 H0 SMD RESISTOR FTR0603220JR R803 455 12022 H0 SMD RESISTOR FTR0603220JR R203 455 12022 H0 SMD RESISTOR FTR0603220JR R202 455 12022 H0 SMD RESISTOR FTR0603220JR R204 455 12022 H0 SMD RES...

Страница 61: ...H0 SMD RESISTOR FTR0603101JR RH18 455 12110 H0 SMD RESISTOR FTR0603101JR RH19 455 12122 H0 SMD RESISTOR FTR0603221JR R618 455 12139 H0 SMD RESISTOR FTR0603391JR RH09 455 12147 H0 SMD RESISTOR FTR06034...

Страница 62: ...H0 SMD RESISTOR FTR0603103JR R611 455 12310 H0 SMD RESISTOR FTR0603103JR R614 455 12310 H0 SMD RESISTOR FTR0603103JR RA17 455 12310 H0 SMD RESISTOR FTR0603103JR RA16 455 12310 H0 SMD RESISTOR FTR06031...

Страница 63: ...456 2110H 11 SMD CAPACITOR 0603CG101J250BA C811 456 2210K B1 SMD CAPACITOR 06032R102K250BA CV05 456 2210K B1 SMD CAPACITOR 06032R102K250BA CD05 456 2310R C1 SMD CAPACITOR 06032E103Z250BA C812 456 2410...

Страница 64: ...ACITOR 06032E104M250BA C504 456 2410M C1 SMD CAPACITOR 06032E104M250BA C514 456 2410M C1 SMD CAPACITOR 06032E104M250BA C510 456 2410M C1 SMD CAPACITOR 06032E104M250BA C653 456 2410M C1 SMD CAPACITOR 0...

Страница 65: ...ACITOR 06032E104M250BA CV09 456 2410M C1 SMD CAPACITOR 06032E104M250BA CV10 456 2410M C1 SMD CAPACITOR 06032E104M250BA CH02 456 2410M C1 SMD CAPACITOR 06032E104M250BA CD09 456 2410M C1 SMD CAPACITOR 0...

Страница 66: ...1 SMD CAPACITOR 0603CG473J500BA CV06 456 3347H 11 SMD CAPACITOR 0603CG473J500BA CV04 456 3347H 11 SMD CAPACITOR 0603CG473J500BA CV07 456 3347H 11 SMD CAPACITOR 0603CG473J500BA CV02 456 3347H 11 SMD CA...

Страница 67: ...6 380PT L517 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L201 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L602 666 13207 00 SMD FERRITE BEAD STPB3216 380PT L601 666 13207 00 SMD FERRITE BEAD STPB321...

Страница 68: ...04AWT X502 364 34186 00 4 PINS CONNECTORS TJC10 4AWT X802 364 34186 00 4 PINS CONNECTORS TJC10 4AWT X801 364 34186 00 4 PINS CONNECTORS TJC10 4AWT XA02 364 38104 00 8 PINS CONNECTORS TJC3 08AWT X501...

Страница 69: ...859 11396 00 DIGITAL BOARD SHIELD COVER TOP 859 11397 00A DIGITAL BOARD SHIELD COVER BOTTOM 855 A0053 HEXAGONAL SCREW M3X7 301 RL27U6 32MA RC R32M 0AREMOTE CONTROL UNIT DIGISTAR...

Страница 70: ...LCD S M U _Ver 1 0...

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