TCL LCD20VSHN Service Manual Download Page 18

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” LCD TV

TCL LCD20VSHN

5. Repair Flow Chart

5.1 No Power (No LED indicator)

Check power cord

and board interface

Plug in power cord and interface

Check F901, BD901

Replace F901 or BD901

Check the circuit

Check IC901 Q901

Replace IC901 or Q901

Check T901

Replace T901

Check D904, D902

Replace D904, D902

Replace Q903, ZD902,

IC903, IC902

Check Q903, ZD902, IC903 IC902

and relative circuit

Check Q906, IC905 and relative circuit

No Power

Summary of Contents for LCD20VSHN

Page 1: ...CING R FOR TH UNIT WHEN S 6 1 Main Board 24 6 2 Power Board 26 6 3 Tuner Board 29 6 4 Key Board 30 6 5 IR Board 30 6 6 Earphone Board 31 7 Block Diagram 32 8 Schematic Diagram 33 8 1 Main Board 33 8 2...

Page 2: ...eristics might create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from TCL TCL assumes no liability express or impli...

Page 3: ...20 LCD TV TCL LCD20VSHN 3 Revision List Version Release Date Revision Instructions TPV Model A00 Mar 16 2007 Initial Release E206CHNKF8TL2...

Page 4: ...TV Standard NTSC PAL N PAL M Sound System MST SAP Video Input Video AV RCA x 1 Audio L R x 1 S VIDEO S Videox 1 YPbPr YPbPr x 1 Audio L R x 1 YPbPr support modes 480i P 576i P 720P 1080i Audio output...

Page 5: ...t your input source press repeatedly to select source CAPTION Press this button to select Closed Caption mode off CC1 4 TXT 1 4 SWAP Not Supported Size Not Supported POWER Power on Off 0 9 100 Digit b...

Page 6: ...Adjust the items including Sound setup Picture Setup Child Lock Setup Function Setup and TV setup When the input source is PC or Component mode only the Sound Setup Picture Setup and Function Setup c...

Page 7: ...ssary The following menu will appear when selecting continuously 5 Preset Designed for different types of sound output wherein the Voice music and theater modes are preset you can set Bass Treble and...

Page 8: ...You can select the three Color temperatures of Warm Normal and Cold or manually adjust red green or blue in the User setting you can only adjust red green and blue in the User setting 8 Reset to defa...

Page 9: ...e input source is in TV Video or S Video mode you can select Source OSD Language Child lock Sleep Timer CC Mode and Reset to default shown in the figure below 1 Current Source OSD setting When OSD is...

Page 10: ...er the Child Lock setting only when the Child Lock is ON When you enter the Child Lock setting a message on the display will prompt you to enter password You can enter the Child Lock setting to set up...

Page 11: ...ld like to stop Auto Search during the process simply by pressing the MENU button 5 Fine tune NTSC M PAL N PAL M is seldom used 6 AFC can be set to ON or OFF When it is set to ON the TV will search th...

Page 12: ...Video left audio track input 7 AV or S Video right audio track input 8 S Video signal input 9 10 and 11 Pr Pb Y Component signal input 12 Y Pb Pr left audio track input 13 Y Pb Pr right audio track in...

Page 13: ...e TV MENU Key Press to show the OSD menu and exit OSD menu at the TV CH Down Up Key Select the intended function by pressing these two keys or switch the channels in the TV mode Vol Key Press to confi...

Page 14: ...emale AV Composite Video Rear side RCA female Yellow Component video Y Pr Pb Rear side RCA female Red Green Blue AV HD Audio Rear side RCA female Red White Video Mode fH kHz fV Hz Dot clock MHz Sync p...

Page 15: ...l Instructions 1 Remove the hinge cover and cable cover Figure 1 2 Remove the 4 screws to remove the base Figure 2 3 Remove the 8 screws to remove the back cover Figure 3 Note Put it to a soft clean a...

Page 16: ...0VSHN 16 4 Remove the screws to remove the shield and main frame from bezel Figure 4 5 Remove the screws and connect wire to remove the main board power board and tuner board from main frame Figure 5...

Page 17: ...20 LCD TV TCL LCD20VSHN 17 6 After above steps turn main frame with panel over and remove 4 screws to remove the panel from main frame Figure 6 7 The panel only...

Page 18: ...ord and interface Check F901 BD901 Replace F901 or BD901 Check the circuit Check IC901 Q901 Replace IC901 or Q901 Check T901 Replace T901 Check D904 D902 Replace D904 D902 Replace Q903 ZD902 IC903 IC9...

Page 19: ...Reset source Check LVDS cable NG Replace LVDS cable Check 12V power supply Return to 1 Check U406 Replace U406 Check panel Replace panel Check main board power supply Check I2 C communication Repair I...

Page 20: ...start LED indicator yellow NG Repair the keyboard Check 5V_SB Check every chip power supply Check I2 C communication Check keyboard Replace I2 C communication component Check oscillistor Replace oscil...

Page 21: ...ircuit Replace the filter or inductance Repair each relative circuit Check TU100 Replace TU100 AV S video signal component PC signal Check LVDS cable Replace LVDS cable Replace panel Abnormal display...

Page 22: ...the filter or inductance Check TU100 Replace TU100 AV component S video PC signal Check Amplifier U601TDA7266D Replace U601 Check Earphone jack Replace the Earphone jack Check speakers Replace speaker...

Page 23: ...6 Key Board OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch Y Is Key Pad Board Normally Replace Key Pad Board...

Page 24: ...20 LCD TV TCL LCD20VSHN 24 6 PCB Layout 6 1 Main Board...

Page 25: ...20 LCD TV TCL LCD20VSHN 25...

Page 26: ...20 LCD TV TCL LCD20VSHN 26 6 2 Power Board...

Page 27: ...20 LCD TV TCL LCD20VSHN 27...

Page 28: ...20 LCD TV TCL LCD20VSHN 28...

Page 29: ...20 LCD TV TCL LCD20VSHN 29 6 3 Tuner Board...

Page 30: ...20 LCD TV TCL LCD20VSHN 30 6 4 Key Board 6 5 IR Board...

Page 31: ...20 LCD TV TCL LCD20VSHN 31 6 6 Earphone Board...

Page 32: ...U402 PI5V330Q U404 RGB Gain Input PC Audio AV Audio HD Audio Switch 4052 Video H V Output PC H V Input Select H V Input TTL output LVDS output PANEL DC 12V DC 5V Inverter DDC EEPROM DDC SCL SDA EEPRO...

Page 33: ...R505 75 C406 10uF Q403 PMBS3904 C485 270pF C405 10uF S1A 2 S2A 3 S1B 5 S2B 6 S1C 11 S2C 10 S2D 13 N 1 S1D 14 GND 8 DD 12 DC 9 DB 7 DA 4 VCC 16 O 15 U402 PI5V330W R487 10K Q404 PMBS3904 R494 130 R506 7...

Page 34: ...Title Size Document Number Rev Date Sheet of T1802 2 X X 2 070111 B CONNECTOR AOC Top Victory Electronics Co Ltd A3 3 14 Friday January 12 2007 Y 1 2 3 4 5 6 7 8 CN114 CONN D_DECT1 9 STATAV1 D_DECT3 9...

Page 35: ...7K 1 10W 5V 5V R541 4 7K 1 10W R534 1K 1 10W ISP_SDA 5 ISP_SCL 5 D409 LL4148 SDA 3 9 11 SCL 3 9 11 R560 2K 1 10W D410 LL4148 ON_OFF 9 13 Title Size Document Number Rev Date Sheet of T1802 2 X X 2 070...

Page 36: ...C 11 S2C 10 S1D 14 S2D 13 DA 4 DB 7 DC 9 DD 12 U404 PI5V330Q 1Y0 12 2Y0 1 1Y1 14 2Y1 5 1Y2 15 2Y2 2 1Y3 11 2Y3 4 S0 10 S1 9 VEE 7 GND 8 E 6 1Z 13 2Z 3 VCC 16 U302 74HC4052D 1 2 ZD405 UDZS5 6B R516 0 1...

Page 37: ...0 1 10W C289 0 22uF 1 2 FB205 600 OHM C225 10uF VSSP2 T23 VSSC4 R23 VDDC4 R24 VDDA3 P23 VREF_POS_LSL P24 VREF_NEG_LSR HPR P25 VREF_POS_LSR HPR N23 VREF_NEG_HPL HPR N25 VREF_POS_HPR N24 XTALIN N26 XTAL...

Page 38: ...S2 Y2 B19 AUDIOIN3L D19 AUDIOIN3R C19 CVBS3 Y3 D18 C2 C3 C18 AUDOUTLSL C17 AUDOUTLSR D17 AUDIOIN4L A23 AUDOUTHPL D16 AUDOUTHPR C16 CVBSO PIP B18 DVBO FMRO C23 U401D LOCI R266 15K C306 0 47uF C305 0 47...

Page 39: ...FB216 300 OHM C282 0 1uF change from 5V_SW to 5V_SW1 Mar 22 06 C280 0 1uF 1 2 FB210 300 OHM C219 100uF 1 2 FB215 300 OHM 1 2 FB217 300 OHM SVM B17 FBISO CSY B16 HOUT A16 VSSCOMB C15 VDD_COMB D15 VIN B...

Page 40: ...r follow EEPROM VCC DIG1 TXD 5 INT0 P0 5 AA25 P1 0 INT1 AA24 P1 1 T0 AA23 VDDC2 AC17 VSSC2 AD17 P0 4 I2SWS AE18 P0 3 I2SCLK AD18 P0 2 I2SD02 AC18 P0 1 I2SD01 AF18 P0 0 I2SDI1 0 AF19 P1 3 T1 AE19 P1 7...

Page 41: ..._IO3 D6 VDD_IO3 B6 VSS_CORE4 A6 VDD_CORE4 B7 NC35 D7 NC34 C7 NC33 D8 NC32 C8 NC31 A7 NC30 B8 NC29 A8 NC28 L14 NC27 M14 NC26 A9 NC25 B9 NC24 B10 NC23 L13 NC22 C10 NC21 A11 NC20 B11 NC19 C11 VSS_CORE3 K...

Page 42: ...CFG10 AE8 A11 CFG11 AE7 VDD_XORE1 AC8 VSS_CORE1 AD8 A12 CFG12 AF7 A13 CFG13 AF8 A14 CFG14 AC9 A15 CFG15 AD9 A16 GPIO 10 AE9 VSS_CORE41 H2 NC4 AC10 VSS_IO1 AD10 VDD_IO2 AE10 NC5 AF10 VSS_CORE21 AC11 N...

Page 43: ...R3 32 RxOUT4 R4 33 RxOUT6 R5 35 RxOUT27 R6 7 RxOUT5 R7 34 RxOUT8 G1 38 RxOUT9 G2 39 RxOUT12 G3 43 RxOUT13 G4 45 RxOUT14 G5 46 RxOUT10 G6 41 RxOUT11 G7 42 RxOUT15 B0 47 RxOUT18 B1 51 RxOUT19 B2 53 RxOU...

Page 44: ...Vo2 2 Vin 3 U103 AIC1084 33PE REF C153 47uF REF REF REF C135 0 1uF 12V_SW 8V 8V For TDA9178 Picture improve R561 10 3W R105 4 7K 1 10W 3 3V_IO FB102 0 nc 1 2 3 Q103 PMBS3906 REF REF Q116 PMBS3904 R106...

Page 45: ...ay January 12 2007 C112 0 1uF 1 2 FB106 300 OHM C117 0 1uF 16V C115 0 1uF C114 0 1uF 16V C116 0 1uF C120 0 1uF 1 2 FB109 300 OHM C119 0 1uF 16V C101 10u 10V C124 0 1uF 16V C122 0 1uF 16V 1 2 FB113 300...

Page 46: ...1 4W C921 0 0047uF 250V R900 680K 1 8W R905 680K 1 4W C901 0 001uF 250V R925 1K 1 10W L904 1 4 2 3 C909 102p IC902 PC123FY24P 1 2 4 3 D901 FR107 C922 4 7uF ZD902 15V SMD C916 1000uF 25V ovp Q903 PMBS3...

Page 47: ...T VDDA GNDA CT RT PWRGND LCT DIM LPWM RT1 REF PDRV_A FB CMP PDRV_C NDRV_D NDRV_B R801 2 4K CN805 1 2 C820 NC 0603 12V R832 33K 0603 CN801 1 2 C840 0 022uF X7R R837 270K 0603 C812 104 0805 C816 0 22uF...

Page 48: ...Vcc G ND COMP FB R932 33K 1 16W R934 3K 1 16W Q906 AOD405L C930 0 1uF 50V C932 1uF 50V FB902 BEAD C938 1000uF 16V L905 L ovp C931 NC R931 22 1 16W R928 1K 1 16W Q905 PMBS3906 3 2 1 5V R935 2 7K R933 4...

Page 49: ...HM C228 330pF C205 0 68u switch J101 JACK 1 2 3 4 5 6 7 8 9 C202 330pF R220 C204 0 22u GND Pb AUDIO1IN_R AV1 L210 120 OHM AUDIO2IN_R AUDIO1IN_R AUDIO1_L R225 R206 C249 NC R223 R226 GND L206 150 OHM R2...

Page 50: ...0V L219 47u C240 47uF R609 22K C235 33nF 50V C234 33nF R606 22 ZD408 5 6V GND GND R607 3 9K D406 BAV99 1 3 2 TU100 TUNER 1 2 3 9 15 12 13 14 4 5 6 7 8 10 11 AGC TU AS VST MT4 MT1 MT2 MT3 SCL SDA NC1 V...

Page 51: ...25 27 29 31 33 35 37 36 39 38 40 41 42 43 44 AGC AV1 AU IN R GND SDA 5V SV Au IN_L YPbPr Au IN_L MOR Pb IF AV1 IN MOL SV Au IN_R YPbPr Au IN_R 12V 03 Rev Code CONNECTOR AOC Top Victory Electronics Co...

Page 52: ...20 LCD TV TCL LCD20VSHN 52 9 Exploded View...

Page 53: ...8014 3536 WIRE HARNESS 095T8014 5571 WIRE HARNESS 095T8014 8D650 WIRE HARNESS 098TR7SW3NETLF REMOTE CARTROL 0D1T 930 6120 SCREW 0M1T1130 6128 CR3 SCREW 0M1T1140 6120 SCREW 4 6MM 0M1T1740 14120 SCREW 0...

Page 54: ...OP 16 BY PER U404 056T 634 2 PI5V330Q QSOP 16 BY PER U301 056T1133 34 M24C02 WMN6TP U406 056T1133518SST AO4 IC SST39VF020 70 4C NHE U403 056T113353A M24C32 WMN6TP Q415 057T 417 4 CHIP PMBS3904 BY PHIL...

Page 55: ...061T0603000 CHIP 0OHM 1 16W R514 061T0603000 CHIP 0OHM 1 16W R515 061T0603000 CHIP 0OHM 1 16W R516 061T0603000 CHIP 0OHM 1 16W R542 061T0603000 CHIP 0OHM 1 16W R549 061T0603000 CHIP 0OHM 1 16W R550 06...

Page 56: ...0603101 CHIP 100OHM 1 16W R555 061T0603101 CHIP 100OHM 1 16W R556 061T0603101 CHIP 100OHM 1 16W R557 061T0603101 CHIP 100OHM 1 16W R445 061T0603101 CHIP 100OHM 1 16W R239 061T0603101 CHIP 100OHM 1 16W...

Page 57: ...3103 CHIP 10KOHM 1 16W R133 061T0603103 CHIP 10KOHM 1 16W R110 061T0603103 CHIP 10KOHM 1 16W R109 061T0603103 CHIP 10KOHM 1 16W R108 061T0603103 CHIP 10KOHM 1 16W R104 061T0603103 CHIP 10KOHM 1 16W R1...

Page 58: ...IPR 15 KOHM 5 1 10W R112 061T0603153 RST CHIPR 15 KOHM 5 1 10W R560 061T0603202 RST CHIPR 2 KOHM 5 1 10W R265 061T0603203 CHIPR 20K OHM 5 1 10W R273 061T0603220 CHIP 22OHM 1 16W R552 061T0603223 CHIP...

Page 59: ...3473 CHIP 47KOHM 1 16W R530 061T0603473 CHIP 47KOHM 1 16W R286 061T0603473 CHIP 47KOHM 1 16W R285 061T0603473 CHIP 47KOHM 1 16W R284 061T0603473 CHIP 47KOHM 1 16W R101 061T0603473 CHIP 47KOHM 1 16W R4...

Page 60: ...01 31 CHIP 100PF 50V NPO C472 065T0603101 31 CHIP 100PF 50V NPO C471 065T0603101 31 CHIP 100PF 50V NPO C456 065T0603101 31 CHIP 100PF 50V NPO C309 065T0603101 31 CHIP 100PF 50V NPO C259 065T0603101 31...

Page 61: ...262 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C263 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C264 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C265 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C266 065T0603104...

Page 62: ...16V X7R C108 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C107 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C106 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C445 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C446 065...

Page 63: ...CHIP 270PF 50V NPO C487 065T0603271 31 CHIP 270PF 50V NPO C488 065T0603330 31 CHIP 33PF 50V NPO C486 065T0603330 31 CHIP 33PF 50V NPO C483 065T0603330 31 CHIP 33PF 50V NPO C468 065T0603333 32 CHIP 0 0...

Page 64: ...X7R C217 065T0805155 A2 MLCC 0805 1 5UF K 10V X7R C232 065T0805225 17 CHIP 2 2UF 16V Y5V C233 065T0805225 17 CHIP 2 2UF 16V Y5V CP406 065T602K220 8T 22PF 10 16V CP405 065T602K220 8T 22PF 10 16V CP404...

Page 65: ...CAP 47UF M 16V C104 067T411F4703XT EC 105 SMD CAP 47UF M 16V C103 067T411F4703XT EC 105 SMD CAP 47UF M 16V C102 067T411F4703XT EC 105 SMD CAP 47UF M 16V FB215 071T 56G301 EA CHIP BEAD 300 OHM 0805 FB2...

Page 66: ...99 D405 093T 6433P BAV99 D404 093T 6433P BAV99 D403 093T 6433P BAV99 FB415 093T 39S 34 T UDZS5 6B ROHM ZD401 093T 39S 34 T UDZS5 6B ROHM ZD402 093T 39S 34 T UDZS5 6B ROHM ZD403 093T 39S 34 T UDZS5 6B...

Page 67: ...M 25V C915 067T215S1024KV EC 105 CAP 1000UF M 25V C916 067T215S1024KV EC 105 CAP 1000UF M 25V C905 067T215S12115K 120UF 450V C940 067T215S471 3K LOW ESR EC 470UF 16V C942 067T215S471 3K LOW ESR EC 470...

Page 68: ...T 60252 SP20150 0M1T1730 8128 CR3 SCREW L902 S73L17450VH TRANSFORMER ASS Y T901 S80GL20T11V X FMR IC905 056T 379 37 FP5001DR LR IC901 056T 379 52 LD7552BS IC801 056T 608 7 OZT1060GN SOIC 20 Q803 057T...

Page 69: ...M 5 1 10W R821 061T0603270 2F RST CHIPR 27 KOHM 1 1 10W R837 061T0603274 RST CHIPR 270 KOHM 5 1 10W R934 061T0603300 1F RST CHIPR 3 KOHM 1 1 10W R832 061T0603333 RST CHIPR 33 KOHM 5 1 10W R932 061T060...

Page 70: ...0 RST CHIPR 0 OHM 5 1 4W JR801 061T1206000 RST CHIPR 0 OHM 5 1 4W JR802 061T1206000 RST CHIPR 0 OHM 5 1 4W JR803 061T1206000 RST CHIPR 0 OHM 5 1 4W JR804 061T1206000 RST CHIPR 0 OHM 5 1 4W JR805 061T1...

Page 71: ...T0603104 32 CHIP 0 1UF 50V X7R C842 065T0603105 12 CHIP 1UF 16V X7R C825 065T0603105 12 CHIP 1UF 16V X7R C818 065T0603105 12 CHIP 1UF 16V X7R C815 065T0603105 12 CHIP 1UF 16V X7R C813 065T0603105 12 C...

Page 72: ...22 4 7U 25V X7R C809 065T1206475 22 4 7U 25V X7R C831 065T1206475 22 4 7U 25V X7R D915 093T 60264 B340A D0 214AC D912 093T 60264 B340A D0 214AC D906 093T 64 44 S LL4148WP D805 093T 6432S IN4148W D808...

Page 73: ...DE SR240S DO 41 SECOS D806 093T 522SE26T DIODE SR240S DO 41 SECOS D811 093T 522SE26T DIODE SR240S DO 41 SECOS D813 093T 522SE26T DIODE SR240S DO 41 SECOS D814 093T 522SE26T DIODE SR240S DO 41 SECOS D9...

Page 74: ...RTON Q45T 88606 3 R PE BAG FOR BASE Q45T 88609 20 R EPE COVER AOC Q52T6025 15103 MYLAR Q52T6025 15199 INSULATING SHEET TUPF6YA1 TUNER BOARD CN604 033T3802 2H WAFER 2P RIGHT ANGLE CN603 033T3802 3H WAF...

Page 75: ...3000 CHIP 0OHM 1 16W R201 061T0603000 CHIP 0OHM 1 16W C212 061T0603000 CHIP 0OHM 1 16W C211 061T0603000 CHIP 0OHM 1 16W C210 061T0603000 CHIP 0OHM 1 16W C209 061T0603000 CHIP 0OHM 1 16W R601 061T06031...

Page 76: ...1 CHIP 100PF 50V NPO C248 065T0603101 31 CHIP 100PF 50V NPO C611 065T0603102 32 CHIP 1000PF 50V X7R C609 065T0603102 32 CHIP 1000PF 50V X7R C677 065T0603104 12 MLCC 0603 0 1UF K 16V X7R C667 065T06031...

Page 77: ...6G301 EA CHIP BEAD 300 OHM 0805 L213 071T 59B121 K CHIP BEAD L212 071T 59B121 K CHIP BEAD L209 071T 59B121 K CHIP BEAD L208 071T 59B121 K CHIP BEAD L207 071T 59B121 K CHIP BEAD D406 093T 6433P BAV99 D...

Page 78: ...CHIPR 330 OHM 1 1 10W R06 061T0603470 0F RST CHIPR 470 OHM 1 1 10W R09 061T0603680 0F RST CHIPR 680 OHM 1 1 10W C828 065T0603101 31 CHIP 100PF 50V NPO SW01 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 SW0...

Page 79: ...Q1T 330 8120 SCREW 3X8MM 0Q1T1030 6128 CR3 SCREW HJPFAA8P HEAD PHONE JACK BOARD 20 TV CN1 033T3802 5H WAFER 5P RIGHT ANELE PI J1 088T 30230C PHONE JACK R2 061T0603391 RST CHIPR 390 OHM 5 1 10W R1 061T...

Page 80: ...2 RGA1L 20 BASE 1 W33T4836 RG L STAND MID 750TVCA1A0722N PANEL TV 20 1 VA07 022 CPT Q07T 8 1 11 COMPOUND PALLET Q40T 20065416A RATING LABEL Q40T 58161548A I O LABEL Q40T0001654 1A CARTON LABEL Q40T000...

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