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LCT TV Service Manual -2 - Model: LCT-20CHST Chassis: LS-07 Model No.: LCT-20CHST Version: 1.0 -3 - CONTENTS SPECIFICATION AND FEATURE ......................................................................................................... 4 THE FUNCTION INTRODUCTION LS07 CHASSIS LCD TV’S MAIN ............................................. 9 SIGNAL PROCESSING FLOWCHART............................................................................................... 22 SPARE PART LIST AND EASY DAMAGE PART LIST ..................................................................... 34 FACTORY MODE ................................................................................................................................. 36 CIRCUIT DIAGRAM ............................................................................................................................ 37 WIRING DIAGRAM ............................................................................................................................. 47 EXPLODED VIEW................................................................................................................................ 48 PART LIST ............................................................................................................................................. 49 Model No.: LCT-20CHST Version: 1.0 -4 - SPECIFICATION AND FEATURE 1. The Technical Specification of F Series Europe LCD TV: a. TM150F7E: Max display format: 1024*768(XGA) Audio power output: 2*2.0W Voltage: DC12V Power adapter voltage: AC 100～240W,50/60HZ Power adapter Model number: FSP048-1AD101C b. W170F7E: Max display format: 1280*768(WXGA) Audio power output: 2*2.0W AC input voltage of inside power Mold piece: AC 100～240V, 50/60HZ The unit sets: AC power Switch. c. TM201F7E: Max display format: 640*480(VGA) Audio power output :2*2.0W AC input voltage of inside power mold piece: AC 100～240V, 50/60HZ The unit sets: AC power Switch. 2. Main feature a. RF input , CATV function Can receive 470MHZ CATV Programs, can store 100 programs (Program number display 0～99); b. AV Audio and AV Video input In scart mode, the system can automatically activate scart checking function to identify signal input modes (CVBS or RGB) and input signal character (16:9 or 4:3); Capable to receive PAL, NTSC, SECAM color systems; Very convenient to watch VCR (video cassette recorder), Pickup Camera and other Disc’s programs. c. YPbPr input Can receive high definition YPbPr component video signal from such as DVD Conveniently . Support format: 480I, 480P, 576I, 576P, 720P (50/60HZ), 1080I (50/60HZ), 1080P (50/60HZ); d. VGA input As the Terminal display Equipments of computer, it can connect with computer conveniently. It can connect with Computer audio card by its own Audio connection line ,so you can listen the audio information from computer. Model No.: LCT-20CHST Version: 1.0 -5 - e. Program lock and child lock function The function of program lock can lock the programs, input password and modification, the function of child lock can lock the keys. f. Timer function You can set turn on and turn off on time, and power off in 15 min automatically if no signal input. Automatically enter into save energy mode by itself if no signal in PC condition, it can be awaken if signal inputs. g. Blue screen mute noise In condition of TV, AV, RGB and YPbPr, gentle blue screen will be displayed if no signal input. h. Chinese/English menu Adopt the design of Convenient and Simple graphic menu, you can operate menu more conveniently and more intuition. i. Save energy function (power management mode) When TV is used as PC display terminal, and PC has no output signal . The TV will be power off in about 30 Seconds automatically, and enter into standby condition. press down Power/P+/P-/ Number key of Remote control or the PC signal appearance again, the TV will be on automatically. j. Plug and play The TV works as the terminal Equipments of computer, need not equip install software，it is real Plug-and-Play. k. Automatic correct By its automatic correct function, the LCD TV can bring you the best view. l. No Flicker, no radiation, green environment protection The LCD TV can bring you high quality view, and avoid radiation, protect your eyes and look after your health. m. Because of it’s advanced power management mode, the TV can realize standby and recall on function. n. ACI function (Auto channel Installation). o. Stereo and digital accompanying sound processing. Auto identify and demodulate IGR, and decode NICAM digital accompanying sound. p. Zoom image function Support follow zoom function: Full screen mode, 4:3 mode (16:9 TFT), 16:9 (4: 3 TFT), Movie mode, Sub-title movie mode. q. Light weight, small dimension, low power consumption Model No.: LCT-20CHST Version: 1.0 -6 - r. Advanced picture quality Strengthen function Dynamic skin color Correct: Improve distort color in picture make it Near to real color. Black level Extension: blacken the more black area of picture. Raise the contrast in Dark Background. Color Edge correct: Increase the Steep of color signal edge make the edge of color Transition more clearly. Brightness edge correct: increase the steep of Brightness signal edge make the edge of picture is more clearly. 3. s. Super fine and inner fairness TFT t. 10-page teletext storage u. Dynamic comb filter v. Headphones output Electric circuit of the TV The Europe LS07 chassis LCD TV is composed of Steady voltage circuit、inverter Circuit, RF circuit, video Strengthen circuit, video Processing circuit, Power Enlarge circuit, VGA circuit, system control circuit and key control circuit. The block diagraph of circuit Constitute is below: Model No.: LCT-20CHST Version: 1.0 -7 - Model No.: LCT-20CHST Version: 1.0 -8 - 4. PCB Module introduction The Constitute of the PCB is easier than LP03 chassis, all the Signal Processing are in Main board. a. Main board Module Main board Module is the main part of Signal Processing in LCD TV. The input signal is converted into uniform digital signal, which can be identified by LCM by system control circuit. Main board module contain two parts of signal processing Module: Philips UOC3 process analog audio and video circuit mainly, MST518 process VGA circuit, signal Format transform system control circuit mainly. The front module can convert the video IF signal and audio IF signal from tuner into RGB analog signal and audio signal, this part is named analog audio and video decoding process. The RGB color from UOC is received by MST518 and accomplishes A/D conversion, output suitable digital color signal to drive circuit of TFT. 8051 Processor inside UOC is responsible for co-operation the each part of works in system, and Respond to user operation, which is operated on Control panel (key-press panel Module). b. Key board Module It is composed of 7 function keys the user can operate the LCD TV conveniently by using this Module. c. Remote control receiving board Module It is composed of a work indicator light and a remote receive head. The user use the remote control box by this module can operate the LCD TV conveniently and know the LCD TV work condition. d. Earphone output board module It is composed of a earphone outlet, user can Listen to by earphone conveniently. e. Inverter board module (include inverter circuit) The function of the inverter is supply power to light tube in TFT and lighten the back lamp Unit of TFT module, so the user can see the image on TFT. Model No.: LCT-20CHST Version: 1.0 -9 - THE FUNCTION INTRODUCTION LS07 CHASSIS LCD TV’S MAIN IC 1. The main IC of LS07 chassis Number Name 1 A1 2 U8, U21 3 2. Model Main function TAF5-E2I21RW2 RF tuner TDA1517AWT Audio amplifier U3 MST518 AD converter and format change 4 U2 UOC(TDA15021H) Video decode and MCU control 5 Q9 Si2311DS MOS switch 6 U11, U12 IRF7316 MOS switch 7 U19 NTMS10P02 MOS switch 8 U23 LM2596-5.0 Liner voltage IC 9 U1 24LC21A EEPROM (save display parameter 10 U4 24LC32A EEPROM（save user control information） 11 U6, U20 PI5V330A Video switch information) The function introduction of main IC a. MST518 high integration chip MST518 is a high performance, high integration image processor which is designed for LCD, it can support SXGA format (1280*1024).it integrates a group of AD converter, high quality format transform system, OSD generator, output clock generator, multiple format output display interface (support TTL, LVDS, RSDS) MST518 feature: Have high quality Expand transform and compress transform, can output XGA format signal Integrated LVDS circuit inside 8 bit high quality ADC inside Double VGA input, Software switch Support ITU-656 format signal input Support H/V sync, composite sync, green composite sync input, and detect automatically by itself Programmable 10 bit Gamma correct, the brightness and contrast is adjustable 8 color, 256 Character OSD Built-in DDC circuit inside Low standby power Support TTL, double LVDS signal output, Software switch Model No.: LCT-20CHST Version: 1.0 -10 - MST518 pin function: And CPU interface Pin Pin name Pin function 33 HWRESET Hardware reset，high voltage enable 82 CS Chip select signal of three-wire serial bus 83 SDA data signal of three-wire serial bus 84 SCL clock signal of three-wire serial bus 85 INT interrupt 98-91 AD [7:0] Parallel bus，the chassis is not used 125 BUSTYPE Bus type select 38 HSYNC0 Analog Horizontal sync signal input channel 0 39 VSYNC0 Analog vertical sync signal input channel 0 40 HSYNC1 Analog Horizontal sync signal input channel 1 41 VSYNC1 Analog vertical sync signal input channel 1 78 RMID Scaler internal reference voltage 79 REFP internal ADC decouple ＋ 80 REFM internal ADC decouple － 75 RIN0 Analog red signal input channel 0 74 RIN0M Analog red signal input channel 0 regrounding voltage 73 SOGIN0 Green sync signal input channel 0 72 GIN0 Analog green signal input channel 0 71 GIN0M Analog green signal input channel 0 regrounding Analog Interface voltage 70 BIN0 Analog blue signal input channel 0 69 BIN0M Analog blue signal input channel 0 regrounding voltage 66 RIN1M Analog red signal input channel 1 regrounding voltage 65 RIN1 Analog red signal input channel 1 64 GIN1M Analog green signal input channel 1 regrounding voltage 63 GIN1 Analog green signal input channel 1 62 SOGIN1 Green sync signal input channel 1 61 BIN1M Analog blue signal input channel 1 regrounding voltage 60 BIN1 Analog blue signal input channel 1 55 REXT Outside connect 390Ω with 3.3V Model No.: LCT-20CHST Version: 1.0 -11 - LCD Interface 145 OCLK Clock output 146 LDE Enable signal 144 LVSYNC Vertical sync output 143 LHSYNC Horizontal sync output 138 LVA0M LVDS output 0－ 137 LVA0P LVDS ouput 0+ 136 LVA1M LVDS output 1－ 135 LVA1P LVDS ouput 1+ 134 LVA2M LVDS ouput 2－ 133 LVA2P LVDS output 2+ 128 LVA3M LVDS output 3－ 127 LVA3P LVDS ouput 3+ 132 LVACKM LVDS clock signal ouput－ 131 LVACKP LVDS clock signal ouput + 26-23,18-15 RB[7:0] TTL red signal channel 14-11, 8-5 GB[7:0] TTL green signal channel 4,3,154,153,150-147 BB[7:0] TTL blue signal channel 87 GOUT1/PWM1 PWM output 1 86 GOUT0/PWM0 PWM output 0 2 BYPASS Outside connect filter capacitor 29 DDC_DAT Analog interface DDC data 30 DDC_CLK Analog interface DDC clock 31 DDCROM_CLK DDC ROM clock 32 DDCROM_DAT DDC ROM data 34 XIN Crystal oscillator signal input 35 XOUT Crystal oscillator signal output 48, 54, 58, 77 AVDD A/D convert power supply 56 AVDD_PLL PLL power supply 36 AVDD_MPLL MPLL power supply VDDP Digital signal output power supply VDDC Digital circuit power supply GND Digital circuit ground GPIO Interface Power Pins 10, 22, 88, 99, 111, 129, 139, 151 19, 102, 114, 142 1, 9, 20, 21, 37, 42, 45, 51, 57, 59, 76, 81, 89, 100, 101, 112, 113, 130, 140, 141, 152 Model No.: LCT-20CHST Version: 1.0 -12 - MST518 inner diagraph: b. TDA15021H introduction: The third-generator super integrated circuit UOC III which designed by Philips company recently integrates with video decode, 2D comb filter, high quality audio transacting technique, suitable with the European teletext technique and suitable with US closed caption and V-chip function compatible with single series IC. The series of UOC III have high integrity, besides completing the Processing of all small signals (IF signal demodulation, video decode, H/V signal, sound DSP), and integrate all the MCU function. It has many Advantages, example: the compact circuit, good performance, simple craft and etc. It matched with company’s high performance price ratio and high product efficiency demanding. It is suitable for 4:3 or 16:9, 50/60HZ and A100/120HZ TV system, the main characteristic below: Multi-system IF demodulation、analog video decode Comb filter internal NICAM, stereo auto identify and decode SCART input channel source auto identify (RGB, CVBS), SCART image input format identify (4:3, 16: 9) Support 4:3, 16:9 display format TOP/FLOF TELETEXT (10 page) receive display Channel auto install ACI function (can preset) 4 CVBS or 3 Y/C input, 1 CVBS output, 2 YcrCb/2 RGB input 4 AV audio input, 1 AV adjustable audio volume output Volume auto level control circuit Global FM demodulation Picture quality enhancement of dynamic peak value control, skin color correct, Gamma correct, Black level extension. Model No.: LCT-20CHST Version: 1.0 -13 - Can turn down horizon and vertical scan part output H/V sync signal to Scaler 128K Flash Memory inside, support program on line Automatic Y/C signal identify TDA15021H pin function: Pin Pin name Pin function 1 VSSP2 Grounding 2 VSSC4 Grounding 3 VDDC4 +1.8V 4 VDDA3 +3.3V 5 VREF_POS_LSL +3.3V 6 VREF_NEG_LSL+HPL 0V 7 VREF_POS_LSR+HPR +3.3V 8 VREF_NEG_HPL+HPR 0V 9 VREF_POS_HPR +3.3V 10 XTALIN Crystal oscillator input 11 XTALOUT Crystal oscillator output 12 VSSA1 Grounding 13 VGUARD/SWIO Protecting voltage input or I/O 14 DECDIG DECDIG signal input 15 VP1 +5V 16 PH2LF The second grade horizontal phase lock filter 17 PH1LF The first grade horizontal phase lock filter 18 GND1 Grounding 19 SECPLL SECAM PLL decouple 20 DECBG Inside reference voltage decouple 21 EWD/AVL VDD5A voltage input 22 VDRB Tv vertical sync signal output 23 VDRA Vertical sync output 24 VIFIN1 VIFinput 1 25 VIFIN2 VIFinput 2 26 VSC Outside connect vertical ramp capacity 27 IREF Recurrent input 28 GNDIF IF grounding 29 SIFIN1 SIF input 1 30 SIFIN2 SIF input 2 31 AGCOUT Tuner RF AGC control voltage output Model No.: LCT-20CHST Version: 1.0 -14 - 32 EHTO Over voltage protection input 33 SSIF MUTE control signal input 34 AUDIOIN5L Av left track signal input 35 AUDIOIN5R Av right track signal input 36 AUDOUTSL SCART/CINCH left track output 37 AUDOUTSR SCART/CINCH right track output 38 DECSDEM Track demodulator decouple 39 QSSO De emphasis capacitor 40 GND2 Grounding 41 PLLIF IF_PLL filter 42 SIFAGC Sound intermediate frequency auto gain control 43 IFVO IF demodulation video output 44 FMRO Fm broadcast output 45 VCC8V The supply voltage of Sound switch 46 AGC2SIF The second sound intermediate frequency auto gain control 47 VP2 +5V 48 IFVO The video output of Choose channel 49 AUDIOIN4L HD signal left track audio output 50 AUDIOIN4R HD signal right track audio output 51 CVBS4/Y4 S-video luminance signal input 52 C4 S-video chroma signal input 53 AUDIOIN2L PC signal left track audio input 54 AUDIOIN2R PC signal right track audio input 55 CVBS2/Y2 AV CVBS signal input 56 AUDIOIN3L Inside DVD module left track audio input 57 AUDIOIN3R Inside DVD module right track audio input 58 CVBS3/Y3 Inside DVD module brightness signal input 59 C2/C3 Inside DVD module chroma signal input 60 AUDOUTLSL Main channel left track output 61 AUDOUTLSR Main channel right track output 62 AUDOUTHPL Earphone channel left track output 63 AUDOUTHPR Earphone channel right track output 64 CVBS/PIP CVBS/PIP output 65 SVM Scan modulate output 66 FBISO Flyback input/sandcastle output or composite H/V timing output 67 HOUT Model No.: LCT-20CHST Version: 1.0 Horizontal sync signal output -15 - 68 VSScomb Grounding 69 VDDcomb +5V 70 VIN V signal input 71 UIN U signal input 72 YIN Y signal input 73 YSYNC Y signal input for Sync separate 74 YOUT Y signal output 75 UOUT U signal output 76 VOUT V signal output 77 INSSW3 RGB/YpbPr insert identify signal input 78 R/PrIN3 R/Pr signal input 79 G/YIN3 G/Y signal input 80 B/PbIN3 B/Pb signal input 81 GND3 Grounding 82 VP3 +5V 83 BCLIN Beam current limiter input 84 BLKIN Black current input 85 RO R basic color signal input 86 GO G basic color signal output 87 BO B basic color signal output 88 VDD3 +3.3V 89 VREFAD_NEG 0V 90 VREFAD_POS +3.3V 91 VREFAD Audio ADC re.voltage 92 GNDA Grounding 93 VDDA +1.8V 94 VDD3A +3.3V 95 VSSADC Grounding 96 VADC +1.8V 97 INT0 Remote control signal input 98 P10/INT1 DPF clock line 99 P11/T0 DPFdata line 100 VDDC2 +1.8V 101 VSSC2 Grounding 102 P04/12SWS MST reset signal 103 P03/12SCLK HD Pc select control signal 104 P02/12SDO2 Power Amplifier standby control signal 105 P01/12SDO1 TV_DPF select control signal Model No.: LCT-20CHST Version: 1.0 -16 - 106 P00/12SDII/O Turn on control signal 107 P13/T1 MST chip select signal 108 P16/SCL UOCI2C bus clock line 109 P17/SDA UOCI2C bus data line 110 VDDP +3.3V 111 P20/TPWM Red indicator light control signal 112 P21/PWM0 Green indicator light control signal 113 P22/PWM1 TFT power supply control signal 114 P23/PWM2 Inside DVD module power supply control signal 115 P30/ADC0 Reserve IO port 116 P31/ADC1 Earphone insert identify signal input 117 VDDC1 +1.8V 118 VDD18 +1.8V 119 P32/ADC2 DVD key-press signal input 120 P33/ADC3 TV key-press signal input 121 VSSC Grounding 122 P24/PWM3 Background control signal output 123 P25/PWM4 SAW filter control signal 124 VDDC3 +1.8V 125 VSSC3 Grounding 126 P12/INT2 MST interrupt signal input 127 P14/RX MST data line 128 P15/TX MST clock line Model No.: LCT-20CHST Version: 1.0 -17 - TDA15021H inside block diagram Model No.: LCT-20CHST Version: 1.0 -18 - c. TDA9178 introduction TDA9178 is a analog signal processor with standard YUV input and output interface .It provid three main process function: luminance vector, color vector and spectrum process. It can finish comprehensive picture improving function independently. The characteristics of the TDA9178 are below: Luminance Transient Improvement (LTI), Colour Transient Improvement (CTI) Variable gamma control Self-suitable black level extend control Skin color correction, green intensity ,blue extend Noise measurement and reduced noise process founction Line Width Control (LWC) TDA9178 PIN DESCRIPTION: Pin Pin name Function 1 Sand castle input Sand castle input 2 Not connected Grounding 3 ADC input 1 A/D convertor input 1 4 ADC input 2 A/D convertor input 2 5 ADC input 3 A/D convertor input 3 6 Luminance input Y input 7 Address selection input I2C address choose input port 8 U signal input U input 9 V signal input V input 10 Test pin Grounding 11 Serial clock input (I2C-bus) I2C bus clock signal 12 Not connected Not connected 13 Not connected Not connected 14 Serial data input/output (I2C-bus) I2C bus data signal 15 Decoupling digital supply Connect decouple capacitor external 16 V signal output V signal output 17 U signal output U signal output 18 Ground Ground 19 Luminance output Y signal input 20 Supply voltage Supply power 21 SCAVEM output Scan velocity modulate output 23 Not connected Grounding 24 Not connected Grounding Model No.: LCT-20CHST Version: 1.0 -19 - TDA9178 inside block diagram: Model No.: LCT-20CHST Version: 1.0 -20 - d. TDA1517AWT brief: The TDA1517ATW is a double channel class-AB power amplifier contained in a plastic heat sink thin shrink small outline package (HTSSOP20). The device is primarily developed for multimedia applications. • Outside circuit is simple • Mute, standby is controllable • Temperature protect circuit • Low noise switch • Constant gain TDA1517 PIN DESCRIPTION: Pin Pin name function 3 Non-inverting input Audio input 5 Supply voltage ripple rejection Bias circuit filter Output Audio output 12, 13 N.C. Not connected 15, 16 Supply voltage ＋12V power supply 17 Mode select switch Work mode select 18 Inverting input Reverse input terminal （connect capacitor to 8, 9 ground ） 1, 2, 4, 6, 7, 10, 11, 14, 19, 20 Model No.: LCT-20CHST Version: 1.0 GND Ground -21 - TDA1517 inside block diagram: Model No.: LCT-20CHST Version: 1.0 -22 - SIGNAL PROCESSING FLOWCHART This chapter mainly introduces analog signals process, video intensify process, TV system control process, TV supply system of the Europe LCD TV. 1. Analog signals process a. IF/RF process Completed by TAF5-E2I21RW2 RF tuner, output IF signal. The Function of RF tuner is below: Pin 2. Symbol Function 1 AGC Auto gain control voltage 2 TU The TV do not connect 3 ADD Ground 4 SCL I2C bus（clock ） 5 SDA I2C bus（data ） 6 BM +5V power supply 7 BM +5V power supply 8 NC Not connected 9 BTL +32V power supply，form 0～32V tune voltage 10 NC Not connected 11 IF IF signal output Image and sound process UOC chip receives the IF signal separated from SAW, detect and decode. Output RGB color analog signals from the 85, 86, 87 pin respectively. Output the main channel L, R audio signal from 60, 61 pin. Output earphone channel L, R audio signal from 62, 63 pin. Additional, Part number U7, TDA9178 complete the enhancement of quality of the picture, by the output 74, 75, 76 pin Of UOC and the input 70, 71, 72 pin, combined with UOC to form a loop circuit. Further, AV, S-Video, YC signal of inside DVD (some types of TV have not) is also decoded inside of UOC chip, switch internal UOC with TV input and output a RGB color analog signal, send it to back-end process. Model No.: LCT-20CHST Version: 1.0 -23 - 3. Digital signal process The analog RGB signal output from UOC and RGB signal output from DFP are switched and selected by a PI5V330A, input it into the 65, 63, 60 pin Of MST518. The RGB signal output from computer and HD-YpbPr signal are switched and selected by another PI5V330A, input into the 75, 72, 70? of MST518. This two channel RGB signal are switched inside MST518, then AD converter, video format transition, at last output digital color signal, which is suitable for TFT drive circuit. MST518 process the pixels ratio converting of input video signal, the image auto optimization process, then process memory buffer, scaler, chroma matrix circuit, chroma look-up table, chroma space gain, etc. Output corresponding standard physical resolution digital color signal and corresponding sync, clock signal to TFT, control the TFT to display image correctly. 4. TV power supply system: a. The supply power system of the main IC is below: 12V:the unit main power supply +34V:RF tuner tune voltage VCC5: stable and constant +5V power supply VCC5A: +5V power supply software can turn off V3_3D:UOC digital part supply power supply V1_8V1:UOC digital part constant supply power supply V1_8V2:UOC digital part power supply can be turned off V2_5M:MST518 digital core supply power supply V3_3M:MST518 supply power supply Model No.: LCT-20CHST Version: 1.0 -24 - b. The constitute and distributing of the TV U8 LM25965.0 12V L3 VCC5 C188 U18 +32V Double voltage 7805 VCC5A PWRON TO INVERTER 12Va U17 TO TDA9178 7808 VPO Fi l t er VAD Fi l t er U14 LM1084_3 V3_3M . 3V PWRON IRF7316 VCC5_SW U11 U13 NCP1117 12V U23 LM25965.0 Model No.: LCT-20CHST Version: 1.0 V3_3D VDPLL Filter U15 LM1117_2 V2.5M . 5V VCC5 VPLL Fi l t er VDD Filter U22 V1_8V1 NPC1117D V3_3M FB39 VCC5 12V FB40 FB41 L6 Q9 NTMS10 P02R V1_8V2 U19 NTMS10 P02R VLCD TO DPF OR DVD C294 -25 - 5. The main element in main board and location of socket and definition 10 25 A 11 12 8 13 14 K 15 7 16 17 6 L 18 19 5 20 4 21 E 22 23 3 24 2 1 Model No.: LCT-20CHST Version: 1.0 -26 - Socket definition Number Name 1 JP1 Connect object Connect socket Function description +12V, +12V, GNG, GND(use when inside power supply plank， JP2 not use ) 2 JP2 Connect adapter +12V, GND, GND（use when outside connect adapter，JP1not use） 3 J8 Connect outside VGA audio input 4 J1 Connect outside VGA input 5 J3 Connect outside HD-YpbPr input 6 J4 Connect outside HD audio input 7 J2 Connect outside SCART signal input 8 J20 Connect outside AV input 9 J9 Connect inside DVD signal input 10 J21 Connect inside DVD signal input 11 J7 Connect inside DVD K panel Look circuit diagram，the second pin is 3.3V 12 J12 Connect earphone output panel 13 J14 Connect speaker 14 J13 Connect speaker 15 J6 Connect TV K panel Look circuit diagram, the second pin is 3.3V 16 J5 Connect remote control 17 J11 UOC debug socket 18 J10 DPF digital photo-frame signal input 19 J17 Connect display screen（TTL Look circuit diagram, the fifth pin is 3.3V AU 20”, 15” screen） 20 J16 Connect display screen（LVDS SAMSUNG 15”, 17” screen） 21 J22 Connect display screen（TTL LG 20”, 17” screen） 22 J15 MST518 debug socket 23 J19 Supply DVD or DPF power Look circuit diagram, the first, second, third pin are 3.3V 24 J18 Connect inverter +12V, +12V, poor light switch, GND, DND, GND Model No.: LCT-20CHST Version: 1.0 -27 - Explain of Main element No. Name Element Function description A A1 RF tuner TAF5-E2I21RW2 RF input, IF output B U2 UOC(TDA15021H) Video decode and MCU control C U3 MST518 AD converter and format transition D U20 PI5V330A Video switch on/off E U6 PI5V330A Video switch on/off F U11 IRF7316 MOS switch G U9 LM2596-5.0 Linear voltage IC H U23 LM2596-5.0 Linear voltage IC I U19 NTMS10P02 MOS switch J U21 TDA1517AWT Audio power amplifier K U8 TDA1517AWT Audio power amplifier L U4 24LC32A EEPROM(store user control information) M Q9 Si2311DS MOS switch N U12 IRF7316 MOS switch O U1 24LC21A EEPROM(store display parameter information) Model No.: LCT-20CHST Version: 1.0 -28 - TYPICAL TROUBLESHOOTING FLOWCHART 1. Typical troubleshooting flowchart a. Not anything (haven’t sound , haven’t picture, haven’t indicator light), and not respond key-press, remote control. N o an sw er,n o k ey p ress,n o rem o te co n tro l NO YES Is o u tsid e ad ap ter(o r in sid e) o u tp u t 1 2 V n o rm al? T h e co n n ectio n o f M ain b o ard an d k ey p ress ,rem o te p lan e is reliab le o r n o t? M en d o r ch an g e ad ap ter YES R eset th e co n n ect lin es Is U 1 3、 U 2 2 o u tp u t p o rt v o ltag e n o rm al? NO YES C h eck each su p p ly p o w er p in s v o ltag e o f U 1 3 、 U 2 2 o u tp u t to U 2 are reliab le o r n o t? C h eck U 1 3、 U 2 2 O u tsid e circu it YES C h an g e U 2 Model No.: LCT-20CHST Version: 1.0 NO O n e p in h as n o v o ltag e 1 、 ch eck o u tsid e p arts o f an ap p aratu s o f su p p ly p o w er p in . 2 、 ch eck th e jo in tin g is O K o r n o t. -29 - b. Have sound no picture, indicator light work normally indicator light work,but black screen when pressing down the power supply key Observe back lamp is on or off YES NO U13、U22 output voltage is normal or not? NO YES Check each supply power pin voltage which output from U13、U22 to U2 is normal or not? Check U13、U22 Outside circuit YES Change U2 Model No.: LCT-20CHST Version: 1.0 Cheeck inverter supply power voltage and connect line One pin no voltage 1、check supply power pin outside parts of an apparatus 2、check the jointing is OK or not -30 - c. White screen: The reason of the troubleshoot is the signal electrode electrode haven’t working voltage. The TFT is always in transparent condition, so the whole screen is in white raster. VLCD of screen socketJ16(J17、J22) in main board is normal or not? YES NO Check Q25、U19、FB39、 FB40、FB41, ect parts of an apparatus Check the jointing of screen socket in main board is OK or not? NO YES Switch signal source,use the oscillograph to check the signal input or not YES Check PCB copper aluminium connect line Model No.: LCT-20CHST Version: 1.0 Patch jointing NO Check U2 outside circuit is normal or not ,change the fault ones. -31 - d. Picture abnormal, color abnormal, short of color Observe the picture is different in one condition by the mode of switch signal source TV、AV condition picture different Check U20 and i t ’ s out si de ci r cui t , check t he Q12、Q14、Q15 i s nor mal or not normal Check the output of 85th、 86th、87th pin of U2 Model No.: LCT-20CHST Version: 1.0 HD、VGAcondition picture different Check U6 and i t ’ s out si de ci r cui t i s nor mal or not normal Check FB1、FB2、FB3、 FB4、FB5 inductance are normal or not all appear picture different Check the jointing of screen socket J16、J17、J22 in main board is OK or not,the connection is OK or not normal Check U2 outside circuit is normal or not,change fault ones -32 - 2. The example of service Example 1: Can’t turn on the TV Troubleshoot phenomenon: After connect power supply and turn on the power supply , the “AKIRA” logo will not appear on screen. Press the key or use the remote control, the TV has no reflect, no display and black screen. The process of maintenance: remove the plug of adapter output, measure adapter output voltage is +12V,the adapter works normally. Check the connection with key-press panel、remote control panel and mainboard. If it is ok, the problem must be MCU not work. First check supply power of U2 chip. Connect power supply, then measure the voltage of the 2, 4 pin of U13NTMS10P02 is 0.2V, and over-heat, the reason must be short circuit of power supply backend. You should remove the plug quickly. Otherwise the chip must be bad. Use the multimeter to measure, confirm it is short circuit to ground. The places, which connect U2 with 3.3V voltage are so many, you should disconnect and measure it one by one. When you disconnect the C68, if it is normal, C68 grounding Short circuit. Example 2: No picture in VGA mode Troubleshooting phenomenon: in TV/AV mode, the image and sound is ok, PC (in VGA mode) is no picture, but have state icon. The process of maintenance: first check the signal source, signal socket, plug are ok or not. Because during switch the mode, the image display normally in non-PC mode, it is proved that the backend image public processing channel is ok, namely U3MST518 and backend image signal processing circuit work normally. In PC mode, measure the arbitrary pin of 4, 7, 12 pin, image date terminal of U6P15V330A by oscillograph there are no waveform, change U6P15V330A and the Troubleshooting phenomenon disappear. Example 3: No picture in VGA mode and the “signal beyond boundary” is appeared on screen. Troubleshooting phenomenon: no picture in VGA mode and the “signal beyond bound” is appeared on screen in TV/AV mode, image, sound is ok. The process of maintenance: first check the signal output from the signal source is not standard or beyond the resolution, which is supported by TFT except of the two cases, the phenomenon comes from the TFT display. Under general circumstance it is caused by the abnormal of the horizon sync impulse, vertical sync impulse of VGA signal. Inspect the 38th, 39th pin of U3 by oscillograph. Find the magnitude of horizon sync impulse is below the normal, measure the waveform of 13th pin of VGA J1. If it is ok, so maybe resistance of the R23 will be large, measure the resistance of R23 is 10K Ω, but the rating resistance is 1K Ω, so it is obvious that the magnitude of horizon sync impulse is attenuated too large caused by value of couple resistance R23 become large. So the pixel clock inside of the MST518 can not vibrate, result in the A/D converter of MST518 internal can not work normally. So appear no picture in VGA mode and “signal beyond boundary” on TFT screen. Model No.: LCT-20CHST Version: 1.0 -33 - Example 4: Can control TV by remote control, but can not control TV by key-press panel Troubleshooting phenomenon: image、sound is ok under any source, use remote control to operate each function is ok, but can not control by using the key-press panel, failure completely. The process of maintenance: first check the socket of J6 on mainboard, the solder and touch of connector are ok or not. if it is ok, check the key-press panel ,measure each resistance, find R1 open circuit, change it . Example 5: The image is ok after turn on the TV, but left speaker has no sound output Troubleshooting phenomenon: the image is normal in TV mode, but the left speaker has no sound output, using remote control to operate, each function is ok. Use AV, PC audio input, is still no sound output. The process of maintenance: measure the waveform from 60th pin of UOC by oscillograph, according to signal flow chat, measure R227、R157、U8、C130 one by one, and observe the waveform is ok or not, find the back end of C130 have not waveform, change C130 and troubleshooting disappear. Model No.: LCT-20CHST Version: 1.0 -34 - SPARE PART LISTS AND EASY DAMAGE PART LIST Spare part lists: TM150F7E: Material name Type (module NO.) Material code JUJ6.690.033-2 8669000332J Remote control panel groupware JUJ6.694.016 8669400160J Key-press panel groupware JUJ6.694.017 8669400170J JUJ6.695.002 8669500020J LTM150XH-L06 68219601565 Main board groupware Remark Earphone panel groupware TFT Samsung INVERTER panel groupware Dynamoelectric speaker Remote control Power supply adapter INV15-474 59324104740 Y2898-01-5W-4Ω 56231105042 KLC5A(JUL2.018.351) 8201803510L FSP084-1CD02C 67128084025 screen use W170F7E: Material name Type (module No.) Material code Main board groupware JUJ6.690.033-1 8669000331J Main board groupware JUJ6.690.033-6 8669000336J Remote panel groupware JUJ6.694.016 8669400160J Key-press panel groupware JUJ6.694.015 8669400150J JUJ6.695.002 8669500020J TFT LTM170W1-L01 68219601701 TFT LC171W03 68211710305 Remark Earphone panel groupware Samsung INVERTER panel groupware INV17-4505 59324125010 screen use LG screen INVERTER panel groupware Dynamoelectric speaker Remote control Inner power supply module Model No.: LCT-20CHST Version: 1.0 INV17-6506 59324165060 Y2898-01-5W-4Ω 56231105042 KLC5A(JUL2.018.351) 8201803510L FSP084-1CD02C 67128084025 use -35 - TM201F7E: Material name Type (module No.) Material code Main board groupware JUJ6.690.033 8669000330J Main board groupware JUJ6.690.033-5 8669000335J Remote panel groupware JUJ6.694.016 8669400160J Key-press panel groupware JUJ6.694.015 8669400150J Remark Samsung Earphone panel groupware JUJ6.695.002 8669500020J screen use TFT A201SN01 68219020110 LG screen use TFT LC201V02 68212010235 INVERTER panel groupware INV18-605D 59324106054 INVERTER panel groupware INV20-606A(D) 59324126061 Samsung Dynamoelectric speaker Y38106-01-5W-4Ω 56231105043 screen use Remote control KLC5A(JUL2.018.351) 8201803510L LG screen use Samsung Inner power supply module Model No.: LCT-20CHST Version: 1.0 FSP084-1CD02C 67128084025 screen use -36 - FACTORY MODE The method of Entering into factory mode: Turn down the volume to 0, press down the key of “mute” in remote control, then press the key of “menu” in remote control. press CH+ and CH- choose the items which need to adjust. The method of exiting from factory mode: Press the again. in remote control, after exiting from the factory mode, you should turn on the TV Now the introduction of the modes which are often used is below, the others are design parameter mode, not permit to modify. M6 The fast key is the key of “language” IFPL Adjust the scale of picture and sound the IF signal M6 The fast key is the key of “language” TOP Tune AGC voltage M13 The fast key is the key of “DVD” DVD The switch of DVD source DPF The switch of DPF source M17 LOGO LOGO display or not BLUEBACK Blue screen switch M24 AUTO Auto revise M25 The fast key is the key of “title” INIT Initialization program M28 The fast key is the key of “0” IIC BUS OPEN Open bus Model No.: LCT-20CHST Version: 1.0 -37 - CIRCUIT DIAGRAM 1 2 3 4 6 5 03_TUNER 03_TUNER IF_OUT +34V SCL_UOC SDA_UOC AGC D D 04_UOCIII TDA15021H 04_UOCIII TDA15021H AV_CVBSIN Y_OUT U_OUT V_OUT TV_R TV_G TV_B TV_HSYNC SANDC AGC M_LOUT M_ROUT HP_LOUT HP_ROUT TV_IR LED_GREEN LED_RED TV_KEY_DEC IF_OUT SDA_UOC SCL_UOC PC_AUD_LIN V_IN U_IN Y_IN HD_PC_SW CSZ_MST SDA_MST SCL_MST RST_MST ASTB SCL_DPF AV_AUD_LIN AV_AUD_RIN HD_AUD_LIN HD_AUD_RIN SDA_DPF PC_AUD_RIN SCL_UOC SDA_UOC ON_PANEL ON_BACKLITE DVD_KEY_DEC HP_IDENT INT_MST TV_DPF_SW PWRON DVD_C2IN DVD_Y2IN DVD_AUD_LIN DVD_AUD_RIN EN_DPF_DVD MUTE TV_VSYNC SVIDEO_Y1IN SVIDEO_C1IN 02_SCART_PC_HD 02_SCART_PC_HD HD_AUD_LIN SC_CVBSOUT SC_AUD_ROUT G_RIN SC_AUD_LOUT G_GIN SCART_B_IN G_BIN SCART_G_IN SCART_R_IN SC_AUD_RIN SC_AUD_LIN STAT_AV FBLIN SC_CVBSIN HD_AUD_RIN PC_AUD_LIN PC_AUD_RIN PR_IN PB_IN HD_Y_IN TV_IR LED_RED LED_GREEN HD_Y_IN PB_IN PR_IN HD_PC_SW SOGIN1 PC_RIN PC_GIN PC_BIN PC_HS PC_VS PC_HSIN PC_VSIN HD_PC_SW DVD_C2IN DVD_Y2IN DVD_AUD_LIN DVD_AUD_RIN PC_RIN PC_GIN PC_BIN PC_VS PC_HS UPDATE_CON VGA_SDA VGA_SCL DDC_SDA DDC_SCL TV_KEY_DEC DVD_KEY_DEC SDA_UOC SCL_UOC C B 06_MST518 06_MST518 05_TV_DPF_MUX 05_TV_DPF_MUX SANDC V_IN V_OUT Y_IN U_OUT U_IN Y_OUT SDA_UOC SCL_UOC TV_HSYNC TV_DPF_VSIN TV_DPF_HSIN TV_B TV_R TV_G DPF_RIN DPF_GIN DPF_BIN TV_DPF_SW TV_DPF_SW DPF_RIN DPF_GIN DPF_BIN TV_VSYNC 07_Panel 07_Panel BB[0..7] PCLK PHSYNC RB[0..7] PVSYNC GB[0..7] PDEN RX0+ RX0RXCLKRXCLK+ RX1RX1+ RX2RX2+ RX3RX3+ C 08_Sound Amplifier 08_Sound Amplifier HP_ROUT HP_LOUT HP_IDENT M_LOUT M_ROUT ASTB MUTE B 09_Power Supply 09_Power Supply +34V PWRON ON_PANEL ON_BACKLITE EN_DPF_DVD SDA_DPF SCL_DPF 10_VGA_UPDATE 10_VGA_UPDATE UPDATE_CON VGA_SCL VGA_SDA DDC_SDA DDC_SCL SCL_UOC SDA_UOC A TV_DPF_RIN TV_DPF_GIN TV_DPF_BIN TV_DPF_HSIN TV_DPF_VSIN PC_HSIN PC_VSIN TV_DPF_BINM TV_DPF_BIN TV_DPF_GINM TV_DPF_GIN TV_DPF_RINM TV_DPF_RIN SOGIN1 G_RIN G_GIN G_BIN G_RM G_GM G_BM SDA_MST SCL_MST CSZ_MST RST_MST INT_MST RB[0..7] GB[0..7] BB[0..7] PCLK PDEN PHSYNC PVSYNC RX0+ RX0RXCLKRXCLK+ RX1RX1+ RX2RX2+ RX3RX3+ TV_DPF_RINM TV_DPF_GINM TV_DPF_BINM G_RM G_GM G_BM SDA_MST SCL_MST CSZ_MST RST_MST VLCD A Title LS07-EU-LCDTV 1208.DDB 1 Model No.: LCT-20CHST Version: 1.0 2 3 4 5 6 -38 - 2 2 2 VCC5 3 12Va 3 R220 100 3 D3 BAV99 BAV99 BAV99 1 D2 1 1 17 C199 D1 R221 R222 4.7K 4.7K J1 Q18 Q13 6 1 11 7 2 12 8 3 13 9 4 14 10 5 15 VRIN ECBP2012M700T FB3 VGIN ECBP2012M700T FB2 VGA_SDA SC_AUD_LOUT PC_GIN C137 C198 10uF16V R224 6.8K 6.8K R225 ECBP2012M700T FB1 VBIN 2N3904 2N3904 PC_RIN R223 R226 1K PC_BIN C8 VGA_V UPDATE_CON R1 C1 R2 C2 R3 C3 75 12pF 75 12pF 75 12pF R9 R10 SC_AUD_ROUT VGA_SCL VCC5A 16 R22 PC_VS ECBP2012M801T 1K C12 R7 220 PC_VS R11 SCART_G_IN R12 100 R13 100 VCC5A 10K C71 47uF16V 2 2 ECBP2012M801T C13 Y PC_HS 1 2.2K ECBP2012M700T 1 3 5 7 9 11 13 15 17 19 21 R40 C11 47K 100pF 47K 100pF R65 10K SC_AUD_RIN R75 10K R39 10K SC_AUD_LIN STAT_AV R62 100 R64 R79 R31 SCART 75 75 75 FBLIN 100 R36 R37 C17 75 75 100pF SC_CVBSIN C18 R38 3.3K 100pF C138 100pF 75 VCC5 2 VGA_V J4A AV-1-2K BAV70 1 VCC5A J4B AV-1-2K 1 R32 3 10K VGA_PWR J3B R45 10K 15K 15K FB52 3 3 D7 BAV99 1 1 7 BAV99 6 5 DDC_SCL DDC_SDA VCLK NC1 NC2 NC3 SCL SDA GND J3C FB53 C14 ECBP2012M700T 10uF16V R217 75 V3_3D R29 3 2 1 PR_IN 47K 10 75 1 U16A J9 14 2 PC_HS 3 PC_HSIN DVD_KEY_DEC ECB2012M800T FB38 U6 HD_Y_IN PC_GIN PB_IN PC_BIN HD_PC_SW 5 6 S1B S2B VCC DA DB 14 13 S1C S2C DC 11 10 S1D S2D DD 1 15 IN /EN GND 16 VCC5A 74LVC126A C120 0.1uF C125 C121 10uF16V 0.1uF 4 U16B 4 R152 100 C124 47nF 7 R153 100 C122 47nF 12 R154 100 C123 47nF R155 390 C133 1nF G_RIN 5 ECI2012M2R2KT C184 PC_VS 6 DVD_Y2IN C185 R55 270pF 270pF 75 R25 10K DVD_AUD_LIN R44 47K C135 100pF PC_VSIN G_GIN G_BIN 74LVC126A 13 U16D 10 R27 10K U16C DVD_AUD_RIN R46 47K SOGIN1 C146 100pF 12 0: Select YPbPr 1: Select PC FB25 1 2 3 4 5 6 7 8 9 10 11 12 CON12 9 8 330pF DVD Signal Input 47K S1A S2A DVD_C2IN C183 330pF HD_PC_SW 2 3 ECI2012M2R2KT V3_3M CON3 PR_IN PC_RIN PC_AUD_RIN C23 100pF SCL_UOC CON4 7 3 2 1 10K R50 Use for WISP and WIC32 R20 C22 100pF C182 TV_KEY_DEC V3_3D PC_AUD_LIN R54 47K R26 10K SDA_UOC VCC5 R16 CON3 J7 R52 3 6 J6 10K FB21 4 3 2 1 C16 100pF GCC02-0085 J11 CON5 HD_AUD_RIN R35 47K R180 22K PR V3_3D TV_IR LED_GREEN LED_RED R51 VCC5A C20 0.1uF 4 AV-1-3 5 4 3 2 1 10K R53 47K 1 2 3 R33 R48 10K 10uF16V R218 75 8 24LC21A J5 C21 J8 VCC 2 C15 PB_IN ECBP2012M700T U1 D8 HD_AUD_LIN R34 47K 100pF 2 AV-1-3 5 2 2 R43 4 PB R41 Option R42 R179 22K 3 5 D6 11 9 8 PI5V330A 74LVC126A 74LVC126A Title _EU_for_ Model No.: LCT-20CHST Version: 1.0 2 4 6 8 10 12 14 16 18 20 22 2 4 6 8 10 12 14 16 18 20 22 R78 C10 1 1 BAV99 C7 J2 R56 10K 10uF16V R219 4 R24 C136C6 R92 Q8 2SA1162 HD_Y_IN 33pF AV-1-3 D4 SC_CVBSOUT C24 FB51 100pF 3 J3A 1K 100pF 3 R23 75 100pF R178 22K C12,C13 option (open for better phase) FB4 100 R8 VCC5 PC_HS 100pF 1 3 5 7 9 11 13 15 17 19 21 330 330 SCART_B_IN SCART_R_IN 220pF R21 C9 100pF FB5 BAV99 10uF16V 1K 1-788624-2/AMP D5 C233 0.1uF 100uF16V LS07-EU-CONNECTORS -39 - 1 2 3 4 6 5 D D TAF5-E2I21RW2 PAD PAD PAD PAD IF-OUT NC BTL NC VCC5A FB32 R49 R105 R109 4.7K L2 0 11 10 9 +5V SDA +5V 8 7 6 ADD TU SCL 5 4 3 2 1 AGC PHILIPS 12 13 14 15 ECI2012KR56KB A1 10 C224 22nF ECI2012K220T C227 100uF16V IFGND C209 IF_OUT C C204 C 10nF Q1 2SC388 10nF C221 R47 100 SCL_UOC SCL_UOC R60 47 SDA_UOC R61 47 R41 3.3K 10nF R110 100 IFGND SDA_UOC L5 +34V ECI2012K220T VCC5A C242 R112 AGC AGC 10K R113 FB35 10K C147 ECB2012M800T C240 C241 C148 47uF16V 47uF16V 0.1uF D11 C244 4.7uF/50V 0.1uF uPC574 B 0.1uF D10 IN4148 R111 B C239 22uF16V 68K A A LS07-EU-TUNER 1 Model No.: LCT-20CHST Version: 1.0 2 3 4 5 -40 - 1 2 4 3 U2B SCART_G_IN 0.1uF 0.1uF 79 C139 SCART_B_IN R167 FBLIN 0.1uF C29 C26 U_IN R63 Y_OUT 0.1uF 0 70 71 0.1uF Y_IN 80 77 100 V_IN D 78 C30 0.1uF 72 C31 0.1uF 73 VCC5A R3/Pr YOUT UOUT/INSSW2 VOUT/SWO1 G3/Y B3/Pb CVBSO/PIP FBLIN V/R2/Pr ROUT GOUT BOUT U/B2/Pb BCLIN Y/G2/Y BLKIN SVM FBISO YSYNC 74 75 76 Y_OUT V1_8V1 Y_OUT U_OUT V_OUT U2A FB8 64 C36 R67 R68 R69 85 86 87 83 C33 100 100 100 C39 0.1uF TV_R TV_G TV_B 15 VDD5A_1 47uF16V 18 FB9 C37 C34 C40 VREF 0.1uF R70 R71 100 27K 47uF16V 40 PC_AUD_LIN PC_AUD_RIN DVD_AUD_LIN DVD_AUD_RIN UOC_VIFIN2 25 UOC_SIF1 29 UOC_SIF2 30 C61 C57 2.2uF C246 C245 2.2uF 53 54 56 57 21 19 2.2uF 2.2uF VDD5A_1 R73 47K C58 C HD_AUD_LIN HD_AUD_RIN C55 SC_AUD_LIN SC_AUD_RIN 2.2uF 49 50 2.2uF C60 2.2uF 34 35 33 2.2uF MUTE 4.7K 23 22 20 TV_VSYNC C53 C54 R76 C89 10uF16V 39K R91 12K C86 330nF 100K R94 VIFIN2 SIFAGC SIF1 AGC2SIF 1K AUDIO2_INL AUDIO2_INR AUDIO3_INL AUDIO3_INR EWD/AVI SECPLL AUDIO4_INL AUDIO4_INR AUDIO5_INL AUDIO5_INR SSIF VDRA VDRB DECBG EHT GNDIF C91 4.7uF 38 C92 3.3nF 39 91 13 C87 C90 47uF16V 0.1uF AUDOUTSR AUDIO_OUT_LSL AUDIO_OUT_HPR INT0 P00/I2SDI1/0 P01/I2SDO1 P02/I2SDO2 P03/I2SCLK P04/I2SWS P10/INT1 P11/T0 P12/INT2 P13/T1 P14/RX P15/TX P16/SCL P17/SDA PH1LF PH2LF P20/TPWM P21/PWM0 P22/PWM1 P23/PWM2 P24/PWM3 P25/PWM4 6.8nF B AUDOUTSL AUDIO_OUT_HPL 32 28 16 R72 41 R77 680 C35 AGC VCOMB C44 10uF16V DECSDEM QSSO REFAD P30/ADC0 P31/ADC1 P32/ADC2 P33/ADC3 VGUARD V3_3D GNDA3 1 FB13 390 C64 42 C62 1uF/50V 46 C63 1uF/50V 680nF 4 C67 C75 89 C46 C51 0.1uF 0.1uF 68 0.1uF 100uF16V VADC 96 FB18 60 61 R80 62 100 63 97 R81 R82 100 100 106 105 104 103 102 R114 R229 R230 R231 R232 100 100 100 100 100 R212 R213 98 99 126 107 127 128 108 109 R233 HP_LOUT C82 220nF GNDA VSSADC 0.1uF 95 V1_8V2 111 112 113 114 122 123 R97 R100 R234 R96 R235 R236 100 100 100 100 100 100 100 100 100 115 116 119 120 R237 R101 R238 R95 100 100 100 100 C80 220nF 0.1uF 92 110 0.1uF C73 C77 10uF16V 0.1uF VDDP VDDC VDD3A 3 C81 C70 V1_8DIG C74 118 VDD18 VSSC C78 5 0.1uF VREF_SDAC1 0.1uF 10uF16V V3_3D 6 VCC5 C85 C94 C96 0.1uF C84 100uF16V 0.1uF 2 45 VDD5A_2 GREF_SDAC1 7 FB20 V8SWTCH V3_3D FB56 0.1uF FB16 C FB17 94 V1_8V1 VREF_SDAC2 DECDIG 14 DECDIG C97 XIN 100uF16V 0.1uF 8 LED_RED LED_GREEN ON_PANEL EN_DPF_DVD ON_BACKLITE 10 Y1 GREF_SDAC2 XOUT 9 11 VREF_SDAC3 C99 TDA15021H_1 24.576M 33pF STAT_AV HP_IDENT DVD_KEY_DEC TV_KEY_DEC C101 33pF B Select Y2 - Saronix 9922 520 20264 VIN 3.3K 3.3K 3.3K 3.3K VCC5 K3953M T1 C83 220nF FB15 SCL_UOC SDA_UOC TDA15021H_2 93 V1_8V1 SCL_DPF SDA_DPF INT_MST CSZ_MST SDA_MST SCL_MST SAW_SW VDDA C76 10uF16V C69 47 47 VDD3 GNDAUD PWRON TV_DPF_SW ASTB HD_PC_SW RST_MST 10K 10K 88 C72 0.1uF TV_IR R103 R104 R98 R99 C68 HP_ROUT R214 R215 R216 100 FB19 FB14 100 100 V1_8V2 C79 12 37 VCC5A FB12 69 VSSCOMB VDD3A V3_3D 100 10uF16V C140 SC_AUD_LOUT 100 R169 10uF16V C141 SC_AUD_ROUT R227 100 M_LOUT R228 100 M_ROUT D 10 GNDA 0.1uF R168 V3_3D R211 90 VCC5 36 C52 100uF16V 0.1uF 10nF SIF2 IREF VSC 17 IFGND C88 1uF/50V PLLIF 27 26 0.1uF R93 VIFIN1 AUDIO_OUT_LSR C59 C56 R74 220nF VSS_REF VDD5A_3 81 SVO/CVBSI 31 43 44 C49 680nF 220nF GNDA2 82 C41 0.1uF AGC IFVO FMRO C48 680nF 4 24 UOC_VIFIN1 C38 TV_HSYNC R115 R83 R84 R85 R86 R87 R88 R89 R90 48 VCC5A 67 3.3K 3.3K 3.3K 3.3K 3.3K 3.3K 3.3K 3.3K 3.3K 1K 2.7K R210 R116 R117 R170 SC_CVBSOUT HOUT C47 0.1uF SANDC 3.3K 3.3K 3.3K DVD_C2IN R66 CVBS2/Y2 CVBS3/Y3 CVBS4/Y4 C2/C3 C4 101 121 125 C45 220pF C98 C149 55 58 51 C150 0.1uF 59 52 VDD5A_2 C43 124 100 117 1nF R183 R107 R102 R106 SC_CVBSIN DVD_Y2IN 0.1uF VSSC VSSC VSSC GNDA1 47 VDD5A_2 4.7uF/50V 84 65 66 VDDC VDDC VDDC 0.1uF FB10 C32 0.1uF VDD5A_1 C42 V3_3D U22 GND C4 OUT 4 C5 SCART_R_IN V1_8V1 NCP1117DT18RK UOC_VIFIN1 5 UOC_VIFIN2 SAW 2 1 4 2 1 IF_OUT 3 FB42 C100 C247 C151 C248 C152 0.1uF 100uF16V 0.1uF 100uF16V 0.1uF VCC5 U4 SCL_UOC SDA_UOC 3 R118 R120 2.2K D9 1K VCC5A IFGND 1 4 6 5 3 2 1 SCL VCC SDA A2 A1 GND A0 WP 8 C95 4 7 0.1uF 24LC32A 2.2K 2 5 10nF Q26 R129 DECDIG 10K C107 C106 220nF 47uF16V R126 Q7 V1_8V2 2N3904 A 10K IFGND SAW_SW Title 2N3904 IFGND IFGND 1 Q9 Si2311DS UOC_SIF2 IFGND Model No.: LCT-20CHST Version: 1.0 10K 3 C103 R243 VCC5 0 SAW R119 FB50 UOC_SIF1 IFGND FB43 A R246 K9656M T2 BA792 VCC5 R125 10K IFGND 2 3 U_for_M LS07-EU-UOCIII TAD12021H -41 - 2 4 3 4 1 C154 0.1uF 10uF16V 0.1uF 12Va D C112 DPF_BIN C113 C114 C115 0.1uF 100uF16V 0.1uF D 16 100uF16V 2 3 ECBP2012M700T FB11 5 6 R4 C93 12pF 75 R5 R6 C102 12pF 75 14 13 C105 12pF 75 11 10 DA S1B S2B DB S1C S2C R57 100 C234 47nF R58 100 C235 47nF 12 R59 100 C236 47nF TV_DPF_RIN TV_DPF_GIN U7 DC S1D S2D TV_DPF_BIN VCC 6 Y_OUT DD IN /EN 4 7 9 9 V_OUT UIN YOU VIN UOUT PI5V330A VOUT 1 SANDC 20 YIN 8 U_OUT 8 1 15 S1A S2A VCC U20 ECBP2012M700T FB7 GND DPF_RIN DPF_GIN ECBP2012M700T FB6 MC78M08CDT FB23 3 C249 1 C153 U17 OUT IN ECB2012M800T 2 FB37 GND 4 VCC5A 19 Y_IN 17 U_IN 16 V_IN SC C119 14 SDA_UOC VCC5A SDA 11 SCL_UOC FB44 DECDIG SCL ECB2012M800T C R130 4.7K C238 C237 10uF16V 0.1uF 0: Select TV TV_DPF_SW R145 R146 R147 1: Select DPF 100 100 100 3 4 5 ADCEXT1 ADCEXT2 ADCEXT3 ADR TP VEE NC NC NC 15 7 10 18 2 23 24 0.1uF C Q12 TDA9178T 10uF16V 2N3904 R134 75 FB45 ECI2012M2R2KT DPF Signal Input C250 22pF R131 10K R133 470 C253 C254 470pF 470pF V3_3M J10 R239 13 12 11 10 9 8 7 6 5 4 3 2 1 75 R137 4.7K 1 U10A 14 C108 FB54 R140 DPF_VSIN 1K 2 3 R122 75 R121 75 TV_DPF_VSIN DPF_HSIN ECBP2012M801T C264 220pF 7 TV_R DPF_BIN R132 74LVC126A 10K DPF_GIN C264,C265 option (open for better phase) DPF_RIN 10 CON13 U10C Q14 TV_G C116 10uF16V FB55 2N3904 R142 75 B C251 R138 10K R141 470 22pF FB46 ECBP2012M801T ECI2012M2R2KT C255 C256 470pF 470pF R149 C265 R182 R240 1K 9 8 TV_DPF_HSIN B 33pF 2.2K 74LVC126A V3_3M 75 4 U10B R14 10K TV_VSYNC 5 6 74LVC126A R139 4.7K R15 TV_DPF_SW 3.3K Q2 2N3904 13 Q15 TV_B C117 U10D 10uF16V 2N3904 R151 75 C252 R148 10K 22pF R150 470 FB47 ECI2012M2R2KT C257 C258 470pF 470pF TV_HSYNC R241 12 11 74LVC126A 75 A A Title 1 Model No.: LCT-20CHST Version: 1.0 2 3 LS07-EU-MUX/AUDIO AMP/TDA9178 U_for_MP_ -42 - 2 3 VPO 4 5 V3_3M U3 65 66 63 64 62 60 61 40 41 TV_DPF_RIN TV_DPF_RINM TV_DPF_GIN TV_DPF_GINM TV_DPF_BIN TV_DPF_BINM TV_DPF_HSIN TV_DPF_VSIN C C143 0.1uF C263 0.1uF C142 0.1uF R123 0 Option: C263 and R123 VAD CSZ_MST SCL_MST SDA_MST RST_MST INT_MST R175 390 R124 10K B 6 5 4 3 2 1 REFP RMID REFM 91 92 93 94 95 96 97 98 J15 CSZ_MST SCL_MST SDA_MST RST_MST RIN1 RIN1M GIN1 GIN1M SOGIN1 BIN1 BIN1M HSYNC1 VSYNC1 80 55 VDDC VDDC VDDC VDDC RA0/LVACKP RA1/LVACKM RA2/LVA2P RA3/LVA2M RA4/LVA1P RA5/LVA1M RA6/LVA0P RA7/LVA0M GA0 GA1 GA2 GA3 GA4 GA5 GA6/LVA3P GA7/LVA3M BA0 BA1 BA2 BA3 BA4 BA5 BA6 BA7 RIN0 RIN0M GIN0 GIN0M SOGIN0 BIN0 BIN0M HSYNC0 VSYNC0 DDC_CLK DDC_DAT 79 78 125 82 84 83 33 85 VDDP VDDP VDDP VDDP VDDP VDDP VDDP VDDP AVDD AVDD AVDD AVDD AVDD_MPLL AVDD_PLL 75 74 72 71 73 70 69 38 39 30 29 MST518 OCLK/LVBCKP LDE/LVBCKM LHS/LVB3P LVS/LVB3M REXT RB0 RB1 RB2 RB3 RB4 RB5 RB6 RB7 GB0 GB1 GB2 GB3 GB4 GB5 GB6 GB7 BB0/LVB2P BB1/LVB2M BB2/LVB1P BB3/LVB1M BB4/LVB0P BB5/LVB0M BB6 BB7 BUSTYPE ALE/CSZ RDZ/MST_SCL WRZ/MST_SDA HWRESETZ INT AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 VCC5 CON6 31 32 Only for Debug C144 DDCROM_CLK DDCROM_DAT 86 87 PWM0 PWM1 34 XIN 22pF VPO FB26 D G_RIN G_RM G_GIN G_GM SOGIN1 G_BIN G_BM PC_HSIN PC_VSIN 6 VDD 102 114 142 19 VDPLL VPLL 48 54 58 77 36 56 VAD 88 99 111 129 139 151 10 22 1 D ECBP2012M801T 131 132 133 134 135 136 137 138 115 116 117 118 119 120 127 128 103 104 105 106 107 108 109 110 RA0 RXCLK+ RXCLKRX2+ RX2RX1+ RX1RX0+ RX0- RA1 RA2 RA3 RA4 RA5 RA6 RA7 10uF16V V2_5M 0.1uF0.1uF0.1uF0.1uF0.1uF 0.1uF0.1uF0.1uF VDD ECBP2012M801T GA6 GA7 C170 10uF16V RX3+ RX3- V3_3M VAD C ECBP2012M801T PCLK PDEN PHSYNC PVSYNC RB0 RB[0..7] RB1 GB[0..7] RB2 BB[0..7] RB3 C175 10uF16V RB[0..7] GB[0..7] BB[0..7] V3_3M VPLL FB28 RB4 RB5 RB6 ECBP2012M801T RB7 C178 10uF16V GB1 0.1uF GB2 GB3 GB4 GB5 GB6 GB7 V3_3M BB0 VDPLL FB29 BB1 B BB2 BB3 ECBP2012M801T BB4 C180 10uF16V BB6 R187 C156 R189 GND GND GND GND R188 C157 TV_DPF_GINM R190 100 47nF C158 R191 TV_DPF_BINM 100 47nF C159 47nF G_RM C160 47nF G_GM C161 47nF G_BM 130 140 141 152 1 9 20 21 37 42 45 51 57 59 76 81 89 100 101 112 113 0.1uF 100 47nF 100 100 C262 0.1uF BB7 XOUT BYPASS C181 BB5 R186 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND 2 C179 GB0 100 35 22pF C176 C177 C260 C261 0.1uF0.1uF0.1uF0.1uF TV_DPF_RINM C145 C171 C172 C173 C174 0.1uF0.1uF0.1uF0.1uF FB27 Y2 14.318MHZ C163 C164 C165 C166 C167 C168 C169 C259 FB30 145 146 143 144 15 16 17 18 23 24 25 26 5 6 7 8 11 12 13 14 147 148 149 150 153 154 3 4 C162 A A Title LS07-EU-MST518 1 Model No.: LCT-20CHST Version: 1.0 2 3 4 5 41208.DDB 6 -43 - 1 2 3 4 5 6 VLCD J22 J16 D RX0RX0+ RA7 RA6 RX1RX1+ RA5 RA4 RA3 RX2RX2+ RA2 RXCLKRXCLK+ RA1 RA0 RX3RX3+ GA7 GA6 R143 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 DP13-40DP-1.25V VLCD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 VCC VCC GND GND RxE0RxE0+ GND RxE1RxE1+ GND RxE2RxE2+ GND RxECRxEC+ GND RxE3RxE3+ GND GND D PDEO 0 DF14-20P-1.25H J17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 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 33pF 33pF 33pF 33pF C R127 R128 R135 R136 PHSYNC PVSYNC PDEN PCLK 33 33 33 33 PHSO PVSO RBO0 PDEO RBO1 PCLKO RBO2 RBO3 RB[0..7] RB[0..7] GB[0..7] GB[0..7] BB[0..7] BB[0..7] CN1 33pF CN2 33pF CN3 33pF RBO4 RBO5 RBO6 RBO7 RB0 RN1 RB1 RB2 RB3 RB4 RN2 RB5 RB6 RB7 GB0 RN3 GB1 GB2 GB3 GB4 B RN4 GB5 GB6 GB7 BB0 RN5 BB1 BB2 BB3 BB4 BB5 BB6 BB7 RN6 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 8 7 6 5 8 7 6 5 8 7 6 5 8 7 6 5 8 7 6 5 8 7 6 5 FH12-50S-0.5SH R C279 C278 C277 C276 33 OHM BBO0 33 OHM BBO1 GBO0 BBO2 GBO1 BBO3 GBO2 BBO4 GBO3 BBO5 33 OHM BBO6 GBO4 BBO7 GBO5 GBO0 GBO6 GBO1 GBO7 GBO2 33 OHM GBO3 BBO0 GBO4 BBO1 GBO5 BBO2 GBO6 BBO3 GBO7 33 OHM 33 OHM RBO0 BBO4 RBO1 BBO5 RBO2 BBO6 RBO3 BBO7 RBO4 RBO5 PCLKO RBO6 RBO7 PDEO PVSO CN4 33pF CN5 33pF CN6 33pF PHSO VLCD BBO[0..7] GBO[0..7] NC NC GND GND B0 B1 B2 B3 GND B4 B5 B6 B7 GND G0 G1 G2 G3 GND G4 G5 G6 G7 GND R0 R1 R2 R3 GND R4 R5 R6 R7 GND DCLK GND DE GND VSYNC HSYNC GND VCC VCC VCC VCC GND GND NC NC NC C B L A A RBO[0..7] Title LS07-EU-15" 17" 20" LCD Panel 1 Model No.: LCT-20CHST Version: 1.0 2 3 4 5 41208.DDB 6 -44 - 1 2 3 4 6 5 VCC5A FB22 ECB2012M102T D C109 D C110 22uF16V 0.1uF R201 VCC5 8 15K U5A 3 C104 R197 2 C295 100uF16V TDA1308 4 R177 3.3K 1 2 3 4 5 6 HP_IDENT R108 3.3K C268 680pF 4.7nF R158 1.5K R157 2.2K M_LOUT 12V CON6 15K C126 220nF C127 R161 R30 10K 10K U5B HP_LOUT 470nF 5 + 6 - 5.6K ASTB 4 10 11 SGND PGND PGND C132 470uF25V To L_SPK 15 16 8 9 12 13 1 2 6 7 14 19 20 PGND C130 470uF16V J13 1 2 2 HEA PGND C 2N3904 4.7K TDA1308 VDD VDD OUT1A OUT1B OUT2A OUT2B NC NC NC NC NC NC NC IN2MODE SVRR Q27 R245 C118 7 IN1+ 100uF16V C128 47uF16V R198 3 220nF 18 17 5 C66 C C267 C129 0.1uF U8 J12 R199 470nF 12V ECB2012M800T - 5.6K C229 FB24 To Headphone C111 1 HP_ROUT 470nF R176 1K + TDA1517AWT R162 100uF16V 8.2K R181 3.3K C269 680pF FB48 PGND Q16 R156 FB59 MUTE 12V 4.7K ECB2012M800T 2N3904 C19 0.1uF U21 12V D16 IN4148 C27 220nF 3 IN1+ VDD VDD OUT1A OUT1B OUT2A OUT2B NC NC NC NC NC NC NC R164 B 12V C293 R144 Q3 220uF16V R163 C28 22K 100K IN2MODE SVRR 100uF16V M_ROUT 220 220nF 18 17 5 2SA1162 R165 Q5 33K 2N3904 R160 2.2K R159 1.5K C296 4.7nF C25 4 10 11 SGND PGND PGND C50 470uF25V To R_SPK 15 16 8 9 12 13 1 2 6 7 14 19 20 J14 PGND C131 470uF16V 1 2 HEA PGND TDA1517AWT FB60 PGND A A Title 1 Model No.: LCT-20CHST Version: 1.0 B 2 2 3 4 5 41208.DDB LS07-EU-Sound Amplifier and Headphone 6 -45 - 1 2 1 3 C191 470uF16V 0.1uF Feedback 1 Vin 1uF/50V 1uF/50V C190 C189 C134 C292 0.1uF L6 68uH 4 J19 2 output GND 1000uF16V 1N5824 C196 ON/OFF C188 Power Supply to DPF or DVD D13 BAV99 TEM2011 D12 3 5 C192 2 0.1uF 470uF25V 4PIN_POWER VCC5 PW_DPF_DVD D17 C193 D14 C243 1000uF16V 1N5824 0.1uF C197 3 BAV99 SDA_DPF SCL_DPF 1uF/50V 1uF/50V 1 2 3 4 5 6 7 8 C294 0.1uF 470uF25V 3 output U23 LM2596-5.0 12V L4 12 C187 GND C186 Vin ON/OFF D Feedback 1 +12V +12V GND GND 12Va L3 68uH 4 5 U9 LM2596-5.0 12V JP1 4 3 D 12 CON8 12V JP2 C194 D15 C195 3 1 BAV99 VCC5 R192 R166 EN_DPF_DVD 2 3 R28 10K 1uF/50V 1uF/50V 2 Q4 3.3K +34V 2N3904 2.2K FB31 4 12V C U18 OUT V3_3M GND 4 U14 LM1084-3.3V IN VCC5_SW GND V3_3D OUT 4 U13 NCP1117DT33RK VIN VIN VCC5 GND C OUT 4 4 4 DAP VCC5A MC7805CD2T U12B C201 C202 C203 C205 0.1uF 100uF16V 0.1uF 220uF16V 0.1uF C206 C207 C208 C210 C211 0.1uF 100uF16V 0.1uF 220uF16V 0.1uF 6 5 3 3 2 1 1 R19 RY21-2W-6.8 R193 C212 C213 C214 C215 0.1uF 470uF25V 0.1uF 0.1uF C216 IRF7316 10K 0.1uF PWRON R200 C217 C218 0.1uF 100uF16V 4 C200 2 3 1 2 3 FB33 10K Q21 4 2N3904 12V 12Va IRF7316 SAMSUNG 15"17" : +3.3V V2_5M FB36 AU 20": +5V VCC5 LG 17" 20": +12V 12V 1 2 V3_3M 3 0.1uF 4 C219 U15 LM1117-2.5V GND VIN 6 5 OUT 4 U11B 3 B B R195 PWRON PWRON R194 C220 C222 C223 C225 C226 0.1uF 100uF16V 0.1uF 100uF16V 0.1uF 10K ! Stuff one of FB39,FB40,FB41 for different Panel FB39 Q20 10K FB40 FB41 2N3904 ECBC2012M800TECBC2012M800T ECBC2012M800T U19 1 2 3 4 VCC5 C230 R207 VCC5_SW U11A 1 Q24 8 7 J18 C228 0.1uF R203 2 To Inverter IRF7316 10K 8 7 6 5 D D D D VLCD R204 2N3904 1 2 3 4 5 6 2.2K C232 100uF16V 10K ON_BACKLITE Q25 ON_PANEL R206 3.3K 2N3904 R196 3.3K CON6 R242 0 A R202 10K A Q22 2N3904 Title 1 Model No.: LCT-20CHST Version: 1.0 VLCD NTMS10P02R C231 0.1uF 12V VCC5 0.1uF S S S G 2 3 r_MP_2004 LS07-EU-POWER SUPPLY 4 -46 - 1 2 3 4 D D VCC5 C65 0.1uF U24 SDA_UOC VCC5 DDC_SDA VGA_SDA R17 10k C 1 2 3 4 5 6 7 IN1 OUT1 OUT2 IN2 CON2 CON3 GND VCC CON1 CON4 IN4 OUT4 OUT3 IN3 14 13 12 11 10 9 8 SCL_UOC DDC_SCL VGA_SCL C UPDATE CON= +5V, VGA CONNECT WITH UOC MC14016BDR2 UPDATE CON= 0V, VGA CONNECT WITH DDC R18 Q6 UPDATE_CON 4.7k 2N3904 B B Title A 1 Model No.: LCT-20CHST Version: 1.0 2 3 041208.DDB LS07-EU-VGA PORT UPDATE PROGRAM 4 A -47 - WIRING DIAGRAM Model No.: LCT-20CHST Version: 1.0 -48 - EXPLODED VIEW The wiring connection diagram of power supply socket Put on pyrocondensation Umber Blue Yellow/ green Wiring horness 1. Connect each wiring horness and plug with cord according to final wiring connection diagram. 2. The assembly position of each wiring horness and plug with card are confirmed by technologist and fix then at proper location. 3. The paste location of certificate and breakable label is confirmed by technologist make sure the consistency of location. 4. Suspending panel is covered by protective film. 5. Paste insulative board onto transition assembly, then install built-in power supply module. 6. Check if each bottom could mark, if so, protect the four corners of the front frame with blue adhesive tape. The method is confirmed by technologist. Make sure the side with mark "O" should be forward the display panel then installing the power supply switch. Model No.: LCT-20CHST Version: 1.0 -49 - PART LIST NO PART NAME 1 Chassis assembly 2 Front frame assembly 3 Front frame assembly 4 Back cover assembly 5 Base assembly 10 Tapping screw 3x10 11 Tapping screw 3x8 12 Tapping screw 3x6 13 Screw assembly M3x8 14 Screw assembly M4x6 15 Clip (RJ050) Model No.: LCT-20CHST Version: 1.0
