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L5A TFT- LCD TV

SERVICE MANUAL

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Summary of Contents for L5A

Page 1: ...L5A TFT LCD TV SERVICE MANUAL ...

Page 2: ...cations 2 Panel Specification 3 Chassis block diagram 4 Scaler block diagram 5 Block diagram of power supply 6 Chassis overwiev 7 Service mode items and explanations 12 Data sheet of important IC s 17 Recommended Part List 29 Frequency list of channels 30 ...

Page 3: ...rub polarizer surface with materials over HB hardness 2 Keep clean the surface Please wear rubber glove when touch the surface of LCD screen Please use soft and anti static material as cleaner 3 Keep out of water Water on in the LCD may cause electrical short or corrosion Please wipe out dry or water carefully 4 Prevent swift Temperature Humidity change Instantaneous temperature and or humiditycha...

Page 4: ...ning System Frequency Search Manual Search Channel Table Search Number of Program Storage 100 No Ident Timer Picture Freeze Equalizer Zapping AVL Automatic Volume Level Sound Status Memory Picture Status Memory Swap Child Lock Program Lock Picture Format Switching Thru Pin 8 Auto RGB Detect Thru Pin 16 PC Plug Play DDC CI Off Timer Sleep Timer On Timer Picture Smart User Soft Natural Rich Sound Sm...

Page 5: ...A 1280x768 Brightness cd m2 450 250 300 400 500 450 450 Contrast 500 300 400 400 500 500 400 Response Time Tr Tf msec 25 35 25 25 16 25 25 Viewing Angle R L H L 85 85 85 85 60 60 40 50 70 70 60 60 70 70 50 60 80 80 60 60 85 85 85 85 85 85 85 85 Adaptor Input 12V 12V 12V 12V 15V 15V 24V Power consumptions 48W 48W 60W 60W 75W 100W St By Power Consumption 3W 3W 3W 3W 3W 3W 3W Input Range 100 240V 50 ...

Page 6: ...oder SDA 5550 K6T1008V2E SRAM Optional M29W040 Flash Memory MSP3410G AUDIO DECODER TDA1571 Stereo Amplifier TDA1308 Headphone Amplifier Scart 1 SVHS FAV Scart 2 Scaler Stage VGA IN EEPROM 24LC02 CVBS IF SVHS Y C SC1 RGB PANEL YUV HS VS HS VS RGB FB CVBS RGB HS VS SIF AM mono L R L R EEPROM 24LC16 ...

Page 7: ...S VS GM 5221 U500 LCD CONTROLLER U501 PARALEL FLASH MEMORY M29W040B OPTIONAL S505 PROGRAMING CON U503 SERIAL FLASH MEMORY M25P40 U502 EEPROM 24C16 KEYBOARD CON S509 DAUGHTER BOARD FOR TTL INTERFACES S506 CONN LVDS CONNECTOR 20 OR 30 PINS S503 S502 BAC LIGHT UNIT S508 LVDS S500 TTL P A N E L ...

Page 8: ... 5V 3 3V INPUT 12V FOR 14 15 17 INCH 5V STBY 15V FOR 20 22 INCH 12V 24V FOR 23 INCH Panel 12V Power ONLY FOR 23 ONLY FOR 20 22 23 8V V INV F601 PNL EN Power STBY S602 S600 LM2576 U600 LM2576 U607 78L08 U606 78L12 U608 LM1117 1 8V U605 LM1117 3 3V U602 SDI9933ADY LM117 3 3V U604 78L08 U606 V INV 5V STBY ...

Page 9: ...eo input The analog RGB signals coming from the PC input via D Sub15 connector P401 are directly connected to the gm2221 analog input port One EDID IC U400 is provided on board to support VESA standard plug and play compatibility LOW TO MID END LCD TV WITH GM2221 Multimedia Tuner Chroma Decoder VPC 3230D CVBS EXT CVBS S video Scart RGB FB Teletext Decoder MCU SDA5550 ITU 656 8 bit GM2221 ADC PLL I...

Page 10: ...DS cables either single or double LVDS can be made used For supporting different single or double TTL panels a daughter board interface is used via 40 pin S506 connector On this connector the signals are 3x8bit RGB with TTL control signals i e HSync VSync CLK O E etc to support a wide variety of LCD panels Depending on the panel used different daughter boards will be used to support that particula...

Page 11: ...ator which means this IC is always on as soon as power is supplied to the board U603 3 3V_STBY and U605 1 8V_STBY linear regulators are used to supply the voltage necessary for the GM2221 IC and some peripherals These voltages are also available in stand by mode to power the microprocessor inside gm2221 LED IR receiver IC and EEPROM These devices are necessary to wake up the board from stand by st...

Page 12: ...k light intensity Integrated LVDS transmitters to LCD panels with integrated LVDS receivers The LCD panel resolution supported can be up to SXGA resolutions 6 LCD PANEL INTERFACE The L5 A board can drive panels both with LVDS and TTL interfaces The footprints for single LVDS and double LVDS connectors are available on the board S503 and S502 respectively Either of these connectors can be used with...

Page 13: ...IRST ATS BG DK I L Enabling or disabling these options will remove add these standards to Manual Install menu SYSTEM item SCART 2 FAV SVHS If a source is disabled in the Service Menu it will be skipped during source switches If SCART2 is enabled SW assumes that the FAV source share the same path as the SVHS source on the HW If it is disabled it is assumed that FAV and SVHS share separate paths TUN...

Page 14: ...or SCART1 and SCART2 modes Pin8 source switching will still be operational but no picture format changes from Pin8 voltage level will be ignored ATS If this option is set to ON TV will display Country Selection menu in the next start After some country is selected the user will be prompted for the start of AutoProgramming process ADJUSTMENTS This sub menu contains numeric adjustments These items a...

Page 15: ...IMER is selected the user will be able to enter time of the day info for the TV to switch off If SLEEP TIMER is selected the user can specify some time period after which the TV will go to stand by automatically MSP CLIP This selection identifies which method will be used by the sound processor to prevent clipping effects on volume Details can be found in data sheet msp34x0g_4pd pdf page 30 AUTOPR...

Page 16: ...ANCE GERMANY IRELAND ITALY NETHERLANDS NORWAY PORTUGAL SPAIN SWEDEN SWITZERLAND HUNGARY TURKISH GREEK GREECE TURKEY PC MODE PC mode can be entered by pressing PC button on the remote controller User can return back to TV mode by pressing the PC or TV buttons After the switching to PC mode VGA input will be displayed on screen as soon as the mode input resolution and frequency is determined If ther...

Page 17: ...MUTE ON OFF OFF WSS SCART ON OFF ON FIRST ATS ON OFF OFF BACKLIGHT POL ON OFF OFF FACTORY MODE ON OFF OFF ADJUSTMENTS WHITE R 0 255 128 WHITE G 0 255 128 WHITE B 0 255 128 PRESCALE FM 0 127 37 PRESCALE NICAM 0 127 63 PRESCALE SCART 0 127 27 HOTEL VOLUME 0 63 16 AGC 0 31 23 SELECTIONS TUNER TYPE PHILIPS SAMSUNG PHILIPS TELETEXT FAST TOP NO TEXT FAST FAST TOP MSP CLIP REDUCE TONE COMPROMISE DYNAMIC ...

Page 18: ...OSD controller advanced color management and dual LVDS transmitters 1 1 gm5221 System Design Example Figure 1 below shows a typical dual interface LCD TV system based on the gm5221 Designs based on the gm5221 have reduced system cost simplified hardware and firmware design and increased reliability because only a minimal number of components are required in the system TUNER PACK VIDEO DECODER AUDI...

Page 19: ...Color ACC ensures full dynamic range is used in video content On chip Versatile OSD Controller On chip RAM for high quality programmable menus 1 2 and 4 bit per pixel character cells Horizontal and vertical stretch of OSD menus Blinking transparency and blending Supports two independent OSD menu rectangles Proportional fonts Embedded X86 On chip Microcontroller High performance X86 MCU with on chi...

Page 20: ...7 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 AGND_ADC RESERVED AVDD_ADC_3 3 AGND_RED RED RED AVDD_RED_3 3 AGND_GREEN GREEN GREEN S...

Page 21: ... CB1IN G1 Y1IN R1 CR1IN B2 CB2IN G2 Y2IN R2 CR2IN ASGF NC VSUPCAP VSUPD GNDD GNDCAP SCL SDA RESQ TEST VGAV YCOEQ FFIE FFWE FFRSTW FFRE FFOE CLK20 GNDF VRT I2CSEL ISGND VSUPF VOUT CIN VIN1 VIN2 VIN3 VIN4 VSUPAI GNDAI VREF FB1IN AISGND Y0 Y1 Y2 Y3 VSUPY GNDY Y4 Y5 Y6 Y7 GNDLLC VSUPLLC LLC1 LLC2 VSUPPA GNDPA ASGF XTAL2 XTAL1 NC CLK5 VSTBY FPDAT VS MSY HS FSY HC AVO INTLC VSUPSY GNDSY C0 C1 C2 C3 GNDC...

Page 22: ...on Black level expander Dynamic peaking Soft limiter gamma correction Color transient improvement RGB Processing Programmable RGB matrix Digital color bus interface Additional analog RGB Fast blank input Half contrast switch Picture frame generator Deflection Scan velocity modulation output High performance H V deflection Separate ADC for tube measurements EHT compensation Miscellaneous One 20 25M...

Page 23: ...Color Decoder NTSC PAL SECAL Saturation Tint MIXER 2D Scaler PIP Panorama Mode Contrast Brightness Peaking Output Formatter ITU R 656 ITU R 601 Memory Control AGC 2 ADC CIN1 VIN1 VIN2 VIN3 VIN4 VOUT Y OUT CrCb OUT YCOE FIFO CNTL 20 25MHz Y Cr Cb NTSC PAL Clock Gen Y Cr Cb FB Y G U B V R FB RGB YCbCr FB RGB YCbCr LL Clock H Sync Vsync CNTL AVI0 Block Diagram ...

Page 24: ...ble 21 FFRSTW OUT FIFO Reset Write Read 22 FFRE OUT FIFO Read Enable 23 FFOE OUT FIFO Output Enable 24 CLK20 IN OUT Main Clock Output 20 25 MHz 25 GND PA SUPPLYD Ground Pad Decoupling Circuitry Pin No Pin Name Type Short Description 26 V SUPPA SUPPLYD Supply Voltage Pad Decoupling Circuitry 27 LLC2 OUT Double Clock Output 28 LLC1 IN OUT Clock Output 29 V SUPLLCSUPPLYD Supply Voltage LLC Circuitry ...

Page 25: ...alog Front End 66 VRT OUT Reference Voltage Top Analog 67 I2CSEL IN I 2 C Bus Address Select 68 ISGND SUPPLYA Signal Ground for Analog Input connect to GND F 69 V SUPF SUPPLYA Supply Voltage Analog Front End 70 VOUT OUT Analog Video Output 71 CIN IN Chroma Analog Video 5 Input 72 VIN1 IN Video 1 Analog Input 73 VIN2 IN Video 2 Analog Input 74 VIN3 IN Video 3 Analog Input 75 VIN4 IN Video 4 Analog ...

Page 26: ... ADR_DA ADR_WS ADR_CL DVSUP DVSUP DVSUP DVSS DVSS DVSS I 2 S_DA_IN2 NC NC NC RESETQ NC NC DACA_R AVSUP AVSUP ANA_IN1 ANA_IN ANA_IN2 TESTEN XTAL_IN XTAL_OUT TP AUD_CL_OUT NC NC D_CTR_I O_1 D_CTR_I O_0 ADR_SEL STANDBYQ CAPL_M AHVSUP CAPL_A SC1_OUT_L SC1_OUT_R VREF1 SC2_OUT_L SC2_OUT_R ASG3 NC DACM_SUB NC DACM_L DACM_R VREF2 DACA_L NC NC AVSS AVSS MONO_IN NC VREFTOP SC1_IN_R SC1_IN_L ASG1 SC2_IN_R SC...

Page 27: ...Main Clock Output 20 25 MHz 25 DACA_R SUPPLYD Ground Pin No Pin Name Type Short Description 26 V SUPPA SUPPLYD Supply Voltage 27 LLC2 OUT Double Clock Output 28 LLC1 IN OUT Clock Output 29 V SUPLLCSUPPLYD Supply Voltage LLC Circuitry 30 GND LLC SUPPLYD Ground LLC Circuitry 31 Y7 OUT Picture Bus Luma MSB 32 Y6 OUT Picture Bus Luma 34 Y4 OUT Picture Bus Luma 35 GND Y SUPPLYD Ground Luma Output Circu...

Page 28: ...rence voltage IF A D converter 65 AVSUP Analog power supply 5V 66 AVSUP Analog power supply 5V 67 ANA_IN IN IF input 1 68 ANA_IN IN IF common can be left vacant only if IF input1 is also not in use 69 ANA_IN2 IN IF input can be left vacant only if IF input1 is also not in use 70 TESTEN IN Test pin 71 XTAL_IN IN Crystal oscillator 72 XTAL_OUT OUT Crystal oscillator 73 TP Test pin 74 AUD_CL_OUT OUT ...

Page 29: ...SDA5550 MICROCONTROLLER BLOCK DIAGRAM ...

Page 30: ... MTSB ZC5502 AS CABLE PANEL INTERFACE LCD20 CHIMEI Y56502 AS KAB PANEL INTERFACE LCD TV 15 MOLEX L5A ZC5513 AS CABLE PANEL INVERTOR LCDTV FERRIT 20 CHI 8R9100 AS CABLE LCD POWER SWITCH L 350MM S602 031274 JACK POWER HORIZONTAL TU201 8R8138 PH1 TUNER FRONTEND PHILIPS FQ1216MEPT I H 3 U100 452937 IC CHIP VPC3230D C5 QFP80 T R U301 453013 IC SDA5550 PLCC 84 TRAY U304 452662 02 IC CHIP AT24C16AN 10SI2...

Page 31: ... 25 471 25 CH 22 479 25 479 25 479 25 479 25 CH 23 487 25 487 25 487 25 487 25 CH 24 495 25 495 25 495 25 495 25 CH 25 503 25 503 25 503 25 503 25 CH 26 511 25 511 25 511 25 511 25 CH 27 519 25 519 25 519 25 519 25 CH 28 527 25 527 25 527 25 527 25 CH 29 535 25 535 25 535 25 535 25 CH 30 543 25 543 25 543 25 543 25 CH 31 551 25 551 25 551 25 551 25 CH 32 559 25 559 25 559 25 559 25 CH 33 567 25 56...

Page 32: ...25 807 25 CH 64 815 25 815 25 815 25 815 25 CH 65 823 25 823 25 823 25 823 25 CH 66 831 25 831 25 831 25 831 25 CH 67 839 25 839 25 839 25 839 25 CH 68 847 25 847 25 847 25 847 25 CH 69 855 25 855 25 855 25 855 25 CH 70 863 25 863 25 CH 71 871 25 CH 72 879 25 CH 73 887 25 160 00 CH 74 69 25 172 00 CH 75 76 25 220 00 CH 76 83 25 232 00 CH 77 90 25 244 00 CH 78 97 25 256 00 CH 79 59 25 268 00 CH 80 ...

Page 33: ...35 25 335 25 S 26 343 25 343 25 343 25 343 25 S 27 351 25 351 25 351 25 351 25 S 28 359 25 359 25 359 25 359 25 S 29 367 25 367 25 367 25 367 25 S 30 375 25 375 25 375 25 375 25 S 31 383 25 383 25 383 25 383 25 S 32 391 25 391 25 391 25 391 25 S 33 399 25 399 25 399 25 399 25 S 34 407 25 407 25 407 25 407 25 S 35 415 25 415 25 415 25 415 25 S 36 423 25 423 25 423 25 423 25 S 37 431 25 431 25 431 2...

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