AOC Envision L20S421 Service Manual Download Page 85

Page: 85 / 88

20" LCD TV Color Monitor AOC L20S421

12.3. Tuner Board

715T1747-1

C242

R222

100 1/16W

R225 100 1/16W

FOR USA

C251

GND

R226 100 1/16W

C231

330pF

GND

C221

0.33uF/16V

GND

C202

330pF

AUDIO2IN_L

C228

330pF

C217

330pF

SV-Au-IN_R/YPbPr-Au-IN_R

R215

100 1/16W

C212

0.22uF->0 Ohm

C244

L209

120 OHM

C220
0.33uF/16V

R221

100 1/16W

C222
0.33uF/16V

C206

330pF

R220 100 1/16W

C226
0.33uF/16V

C229

330pF

AGND

R204

C211

0.22uF->0 Ohm

R219 100 1/16W

R210

1/16W

L203

150 OHM

R202

75 1/16W

R211

1/16W

R201

0 OHM

AUDIO2IN_R

C245

C223

0.33uF/16V

C230

330pF

GND

AV1

C218

330pF

C204

0.22u

AUDIO2_L

C216

330pF

C250

C215

330pF

AUDIO1IN_R

C249

GND

AUDIO1_L

R217 470 1/16W

SV-Au-IN_L/YPbPr-Au-IN_L

C243

C225
0.33uF/16V

AUDIO1IN_L

R213

1/16W

AUDIO1_R

AUDIO2IN_L

L208

120 OHM

AGND

AV1-IN

AV1-AU-IN-R

R224 470 1/16W

L213

120 OHM

R205

R208

1/16W

C210

0.22uF->0 Ohm

AUDIO2IN_R

L210

120 OHM

L212

120 OHM

C227
0.33uF/16V

C247

SV-Y

R212

1/16W

R209

1/16W

SV-C

C209

0.22uF->0 Ohm

AUDIO2_R

C224
0.33uF/16V

AUDIO1IN_R

AUDIO1IN_L

C246

J103

JACK

AV1-AU-IN-L

C248

switch

J101

JACK

R223 470 1/16W

R218 470 1/16W

GND

TUNERBOARD-01

I/O Interface

AOC (Top Victory) Electronics Co., Ltd.

Wednesday, November 30, 2005

Title

Size

Document Number

Rev

Date:

Sheet

CN202

JACK

R206

75 1/16W

C205

0.68u

L206

150 OHM

R216

100 1/16W

AV1

C207
330pF

L207

120 OHM

C203

330pF

R207

75 1/16W

Summary of Contents for Envision L20S421

Page 1: ... TV Description 14 2 4 Interface Connector 14 3 Precautions and Notices 15 3 1 Assembly Precaution 15 3 2 Operating Precaution 15 3 3 Storage Precaution 15 3 4 High Voltage Warning 15 4 Input Output Description 16 4 1 D SUB Connector 16 4 2 Factory Preset Display Modes 17 5 Front Panel Control Knobs 18 6 Repair Flow Chart 19 7 Mechanical Instructions 25 8 Exploded View 29 9 Parts List of Cabinet 3...

Page 2: ...20 LCD TV Color Monitor AOC L20S421 2 Revision List Revision Date Revision History TPV Model A00 Jun 09 06 First Version Release EAA6CHNKD1ACTMP ...

Page 3: ...y characteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from AOC AOC assumes no liability express or implied arising out of any unauthorized modification of design Servicer assumes all liability FOR PRODUCTS CONTAINING LASER DANGER Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM C...

Page 4: ...V 408mm x 306mm Pixel Pitch 0 63mm x 0 63mm Display Colors 16 7 million Contrast Ratio 400 1 Brightness 350 cd Viewing angel 170 H 170 V Response Time 16ms Lamp Type Life 50000 hr LCD Panel Color Temperature Cool Warm Normal Input support definition 640 480 60Hz VGA Function Audio input Mini jack for stereo headphones 3 5ø TV Standard NTSC M Sound System MTS SAP TV Function Colour systems NTSC AV ...

Page 5: ...tional Chinese Table Stand Yes Wall Mount VESA 100 x 100 mm Power AC100V 240V 50 60Hz Power Power Consumption 70W Panel Tilt Forwards Backwards Rotation 4 18 35 Temperature 0 C 40 C storage 25 C 60 C Environment operating 10 85 Dimension W x H x D with stand 498 x 495 x 180 mm Net weight Without accessory 9 7 Kg Accessory Remote controller Batteriesx2 Power cord Signal Cable Audio Cable User manua...

Page 6: ...y repeatedly to select the number of minutes The counter runs from 5 10 15 20 25 120 minutes PIP Not Supported POP Not Supported MENU Press repeatedly to display OSD menu SIZE Includes 3 modes Press repeatedly to select 4 3 to 16 9 Linear 4 3 to 16 9 non Linear 16 9 option MUTE Temporarily interrupt the sound or restore it DISPLAY Press this button to Display Channel number on the right top corner...

Page 7: ...OSD On Screen Display Adjust the items including Picture Setup Sound 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 Menu Setup can be selected shown in the figure below When the input source is AV or S Video mode the Sound Setup Picture Setup Child Lock Setup and Function Setup can be selected shown in the fig...

Page 8: ... to prevent the bad sound effect resulting from large sound variation 5 Select ON or OFF for Loudness a default setting is preset and you may adjust when necessary The following menu will appear when selecting continuously 6 Preset Designed for different types of sound output wherein the dialogue music and theater modes are preset you can set Bass Treble and Equalizer in sound output mode accordin...

Page 9: ...6 Info Prompt the current size for PC input definition only the definition that can be shown by this device 7 Colour Temp There are four options of colour temperature provided for users 6500 7300 9300 and Personal You can select the three colour temperatures of 6500 7300 and 9300 or manually adjust red green or blue in the personal setting you can only adjust red green and blue in the personal set...

Page 10: ...oft Auto Sharp and Sharpest You can adjust the sharpness of picture using any option above 4 Tint The range can be adjusted from 50 50 use this option to adjust the colour of picture 5 Dyn Skin tone When the Dynamic skin tone is ON the skin tone of person in the picture becomes more vivid 6 Colour Temp There are three options of colour temperature provided for users warm normal and cool 7 Size The...

Page 11: ...ing only when the Child Lock is ON and the V Chip will be enabled you can not enter V Chip level setting when the Child Lock Setup is OFF and the V Chip is disabled 2 Lock code V Chip password can be set up when the code is locked Enter the 4 digit password which you choose The factory default password is 0000 4 Sleep Timer Set the sleeping timer and the alert function which indicates the time lef...

Page 12: ...ng a message on the display will prompt you to enter password You can enter the Child Lock setting to set up the V Chip level when you enter the correct password 1 Age it may be set to Child Teenager Youth Adult Custom or OFF when you select Custom it can be set according to you preference 2 MPAA Rating Select the movie ratings from low to high alert G PG PG 13 R NC 17 X and F 3 PG Rating Shown in...

Page 13: ...and all channels that have been located are stored If you would like to stop Auto Search during the process simply by pressing the function button 5 Fine tune NTSC M is seldomly used 6 AFC can be set to ON or OFF When it is set to ON the TV will search the TV signal automatically when there is any offset in the signal it will automatically adjust the channel to the correct positon 7 Skip can be se...

Page 14: ...rd and transmitting TTL level signals into LCD Module to drive the LCD display circuit The inverter board will drive the six CCFLs Cold Cathode Fluorescent Tube The switching power board will provides the power ON OFF to control the TV and control LED indicator for DPMS The function keyboard and Remote Control will provide the OSD control signal to the Main Board 2 4 Interface Connector A Power Co...

Page 15: ... the power button is turn off 2 Please do not change variable resistance settings in MAIN BOARD they are adjusted to the most suitable value If they are changed it might happen LUMINANCE does not satisfy the white balance spec 3 Please consider that LCD backlight takes longer time to become stable of radiation characteristic in low temperature than in room temperature 4 Please pay attention to dis...

Page 16: ...und 3 Blue Video 11 Not Used 4 Not Used 12 Serial Data for DDC 5 Ground 13 H Sync 6 Red Ground 14 V Sync 7 Green Ground 15 Serial Clock for DDC 8 Blue Ground 3 S Video Y C TV rear side 4 pin Mini DIN female Component Video TV rear side RCA female Red Blue Green TV TV rear side IEC type female AV TV rear side RCA female Yellow AV HD Audio TV rear side RCA female Red White PC Input audio 3 5mm Stere...

Page 17: ...nce Screen Mode Dots Lines Frequency Hz Frequency KHz Horizontal Vertical Horizontal Vertical FULL 15 9 720 400 70 1 31 5 NEG POS YES YES YES 59 9 31 5 NEG NEG YES YES YES 72 8 37 9 NEG NEG YES YES YES 640 480 75 0 37 5 NEG NEG YES YES YES 60 3 37 9 POS POS YES YES YES 72 2 48 1 POS POS YES YES YES 800 600 75 0 46 9 POS POS YES YES YES ...

Page 18: ...or off the TV MENU Key Press to show the OSD menu and exit OSD menu at the TV Down Up Key Select the intended function by pressing these two keys or switch the channels in the TV mode Key Press to confirm your function selection and adjustment volume Source Key Press to select your input source ...

Page 19: ...ower 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 D905 Replace D904 D905 Replace Q903 ZD902 IC903 IC902 Check Q903 ZD902 IC903 IC902 and relative circuit Check Q906 IC905 and relative circuit No Power OK NG OK NG OK NG OK NG OK NG OK ...

Page 20: ...ource 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 I2 C communication relative circuit No display OK NG OK NG OK OK NG OK NG OK NG ...

Page 21: ... Can t start LED indicator yellow NG Repair the keyboard Check 5V_SB Check every chip power supply Check I2 C communication Check keyboard Replace I2C communication component Check oscillistor Replace oscillistor Can t start OK OK NG NG OK NG ...

Page 22: ...lter circuit 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 NG NG OK NG OK RF signal NG OK OK OK NG Check panel NG OK OK Check TV system setup Check input signal ...

Page 23: ...place the filter or inductance Check TU100 Replace TU100 AV component S video PC signal Check Amplifier TDA7266D U601 Replace U601 Check Earphone jack Replace the Earphone jack Check speakers Replace speakers Check relative circuit No sound OK NG OK NG OK NG OK OK NG NG OK NG OK NG Check TV system setup SIF signal ...

Page 24: ...S421 24 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 Check Main Board N N Y Y N ...

Page 25: ...LCD TV Color Monitor AOC L20S421 25 7 Mechanical Instructions 1 Remove the four screws to remove the base 2 Remove the seven screws to remove the back cover 3 Remove the eleven screws to remove the shield ...

Page 26: ...20 LCD TV Color Monitor AOC L20S421 26 4 Remove the twelve screws to remove the main board power board and I O board 5 Remove the two screws to remove the headphone board ...

Page 27: ...20 LCD TV Color Monitor AOC L20S421 27 6 Remove the 15 screws to remove the bezel ...

Page 28: ...20 LCD TV Color Monitor AOC L20S421 28 7 Remove the ten screws to remove the main frame ...

Page 29: ...20 LCD TV Color Monitor AOC L20S421 29 8 Exploded View ...

Page 30: ...0A PAPER PLATE 1 000 044T9003 6 CORNER PAPER 1 000 044TZ001200 4B PIZZA BOX 1 000 045T 88606 3 PE BAG FOR BASE 1 000 045T 88609 20 EPE COVER AOC 1 000 045T 88626 4 PE BAG FOR MONITOR 1 000 050T 500 1 CABLE TIE 6 000 052T 1185 MIDDLE TAPE FOR CARTON 140 000 052T 1186 SMALL TAPE 10 000 052T 1209500 ALUMINIUM TAPE 1 000 052T6020 6 PROTECT FILM 1 000 078T 306500 KL SPK 4OHM 5W KUAIDA 1 000 078T 306500...

Page 31: ...750VVCA1A07 11 CPT 20 1 PANEL 1 000 AM1T1740 14120 SCREW 4 000 CBPFAA6KMPATP MAIN BOARD 1 000 IRPFAA7P IR BOARD 1 000 KEPFAA7P KEY BOARD 1 000 PWTV2062MEF1P 20 TV POWER BOARD 1 000 Q15T8152 13 MAIN FRAME 1 000 Q40T 20061524A RATING LABEL 1 000 Q40T 58161548A I O LABEL 1 000 Q44T200661510A CARTON 1 000 Q52T6025 15103 MYLAR 1 000 TUPFAA3P TUNER BOARD 1 000 041T780061532C SA CENTER LIST 1 000 041T780...

Page 32: ...EW 3X8mm 1 000 0Q1T1030 8128 SCREW 8 000 Q34T1528 GM 5L REAR COVER 1 000 Q34T6357 RGC1L BEZEL 1 000 Q34T6358 RG 1L 20 BASE 1 000 CN103 033T3278 10 10 PLUG B10E XHA JST E10B XHA 1 000 CN114 033T3802 8H WAFER 8P RIGHT ANGLE PITCH 2 0 1 000 CN107 033T801744A FH WAFER 1 000 U409 053T 40504 TPSRA4M50B00 B0 1 000 U202 056T 665505 HD IC VF45A3D HAODA 1 000 U203 056T 665506 HD IC AF45A3D HAODA 1 000 U406 ...

Page 33: ...810T 8 OHM 4A NTCR BY THINKING 1 000 C808 065T 3J1506ET 15PF 3KV 1 000 C835 065T 3J1506ET 15PF 3KV 1 000 C801 065T 3J4706ET 47PF 3KV 1 000 C802 065T 3J4706ET 47PF 3KV 1 000 C804 065T 3J4706ET 47PF 3KV 1 000 C830 065T 3J4706ET 47PF 3KV 1 000 C834 065T 3J4706ET 47PF 3KV 1 000 C836 065T 3J4706ET 47PF 3KV 1 000 C923 065T306M1022BP Y1 CAP 001UF 250VAC MURATA 1 000 C902 065T306M1022BP Y1 CAP 001UF 250VA...

Page 34: ... WIRE HARNESS 1 000 R914 705G 20 61 04 R914 ASS Y 1 000 705T 20 57 06 Q901 ASS Y 1 000 705T 20 61 05 Q903 ASS Y 1 000 705T 20 93 06 D910 D911 ASS Y 1 000 SMTPW2062MEF1P POWER BOARD FOR SMT 1 000 CN604 033T3802 2H WAFER 2P RIGHT ANGLE 1 000 CN603 033T3802 3H WAFER 3P RIGHT ANGLE 1 000 CN605 033T3802 5H WAFER 5P RIGHT ANELE PI 1 000 CN601 033T802444C FH WAFER 1 000 R665 061T153M399 59 3 9 OHM 5 3W 1...

Page 35: ...24C02 WMN6TP 1 000 U403 056T113353A M24C32 WMN6TP 1 000 Q109 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q116 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q403 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q402 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q401 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q202 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q201 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q105 057T 417 4...

Page 36: ...OHM 5 1 10W 1 000 R549 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R516 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R515 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R514 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R513 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R495 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R493 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R492 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R429 061V0603000 CHIPR 0OHM 5 1 10W 1 000 R294...

Page 37: ...W 1 000 R459 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R460 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R461 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R226 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R224 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R217 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R554 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R551 061V0603101 CHIPR 100 OHM 5 1 10W 1 000 R546 061V0603101 CHIPR 100 OHM 5...

Page 38: ...1 000 R116 061V0603102 CHIPR 1K OHM 5 1 10W 1 000 R269 061V0603102 CHIPR 1K OHM 5 1 10W 1 000 R270 061V0603102 CHIPR 1K OHM 5 1 10W 1 000 R302 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R295 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R263 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R262 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R261 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R260 061V0603103 CHIPR 10K OHM 5 1 10...

Page 39: ...0K OHM 5 1 10W 1 000 R107 061V0603104 CHIPR 100K OHM 5 1 10W 1 000 R102 061V0603104 CHIPR 100K OHM 5 1 10W 1 000 R106 061V0603104 CHIPR 100K OHM 5 1 10W 1 000 R272 061V0603105 CHIP 1MOHM 1 16W 1 000 R214 061V0603122 CHIP 1 2K OHM 1 16W 1 000 R213 061V0603122 CHIP 1 2K OHM 1 16W 1 000 R212 061V0603122 CHIP 1 2K OHM 1 16W 1 000 R211 061V0603122 CHIP 1 2K OHM 1 16W 1 000 R265 061V0603123 CHIP 12K OHM...

Page 40: ...1 16W 1 1 000 R411 061V0603470 CHIP 47OHM 1 16W 1 1 000 R410 061V0603470 CHIP 47OHM 1 16W 1 1 000 R457 061V0603470 CHIP 47OHM 1 16W 1 1 000 R458 061V0603470 CHIP 47OHM 1 16W 1 1 000 R105 061V0603472 RST CHIPR 4 7KOHM 5 1 10W 1 000 R281 061V0603472 RST CHIPR 4 7KOHM 5 1 10W 1 000 R413 061V0603472 RST CHIPR 4 7KOHM 5 1 10W 1 000 R502 061V0603472 RST CHIPR 4 7KOHM 5 1 10W 1 000 R540 061V0603472 RST C...

Page 41: ...0 FB408 061V0805000 CHIP 0OHM 1 10W 1 000 FB412 061V0805000 CHIP 0OHM 1 10W 1 000 FB413 061V0805000 CHIP 0OHM 1 10W 1 000 FB414 061V0805000 CHIP 0OHM 1 10W 1 000 FB416 061V0805000 CHIP 0OHM 1 10W 1 000 FB104 061V1206000 CHIP 0 OHM 1 8W 1 000 R210 061V1206000 CHIP 0 OHM 1 8W 1 000 FB101 061V1206000 4 0 OHM 4A 1 4W 1 000 FB117 061V1206000 4 0 OHM 4A 1 4W 1 000 R117 061V1206229 CHIP 2 2OHM 5 1 8W 1 0...

Page 42: ...K 16V X7R 1 000 C261 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C246 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C247 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C248 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C249 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C250 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C251 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C252 065T0603104 12 ...

Page 43: ...0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C122 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C121 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C120 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C119 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C118 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C117 065T0603104 12 MLCC 0603 0 1UF K 16V X7R 1 000 C116 065T0603104 12 MLCC 0603 0 1UF K 16V X7R...

Page 44: ... 000 C481 065T0603105 17 CHIP 1UF 16V Y5V 1 000 C482 065T0603105 17 CHIP 1UF 16V Y5V 1 000 C476 065T0603120 31 CHIP 12pF 50V NPO 1 000 C477 065T0603120 31 CHIP 12pF 50V NPO 1 000 C478 065T0603120 31 CHIP 12pF 50V NPO 1 000 C142 065T0603221 31 CHIP 220PF 50V NPO 1 000 C439 065T0603221 31 CHIP 220PF 50V NPO 1 000 C438 065T0603221 31 CHIP 220PF 50V NPO 1 000 C140 065T0603224 17 CHIP 0 22UF 16V Y5V 1 ...

Page 45: ...900PF 50V X7R 1 000 C203 065T0603470 31 CHIP 47PF 50V NPO 1 000 C204 065T0603470 31 CHIP 47PF 50V NPO 1 000 C205 065T0603470 31 CHIP 47PF 50V NPO 1 000 C206 065T0603470 31 CHIP 47PF 50V NPO 1 000 C319 065T0603470 31 CHIP 47PF 50V NPO 1 000 C318 065T0603470 31 CHIP 47PF 50V NPO 1 000 C317 065T0603470 31 CHIP 47PF 50V NPO 1 000 C258 065T0603470 31 CHIP 47PF 50V NPO 1 000 C214 065T0603470 31 CHIP 47P...

Page 46: ... 067T 312100 3 SMD EC 10UF 16V 85C B 1 000 FB105 071T 56G151 A CHIOP BEAD 150 OHM 1 000 FB209 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB203 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB202 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB201 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB114 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB113 071T 56G301 EA CHIP BEAD 300 OHM 0805 1 000 FB217 071T 5...

Page 47: ...D403 093T 6433P BAV99 1 000 D404 093T 6433P BAV99 1 000 D407 093T 6433P BAV99 1 000 D406 093T 6433P BAV99 1 000 D405 093T 6433P BAV99 1 000 FB415 093T 39S 34 T UDZS5 6B ROHM 1 000 ZD401 093T 39S 34 T UDZS5 6B ROHM 1 000 ZD402 093T 39S 34 T UDZS5 6B ROHM 1 000 ZD403 093T 39S 34 T UDZS5 6B ROHM 1 000 ZD405 093T 39S 34 T UDZS5 6B ROHM 1 000 ZD406 093T 39S 34 T UDZS5 6B ROHM 1 000 D201 093T 64S51752T ...

Page 48: ...T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 SW03 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 SW04 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 SW05 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 SW06 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 SW07 077T 604 2 TO CHIP TACT SW TS 9 TMG 533 1 000 ZD01 093T 39S 34 T UDZS5 6B ROHM 1 000 715T1822 1 KEY BOARD PCB 1 000 R914 061G152M33858F 0 33 OHM 5 2...

Page 49: ...PR 1K OHM 5 1 10W 1 000 R930 061V0603102 CHIPR 1K OHM 5 1 10W 1 000 R804 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R803 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R806 061V0603103 CHIPR 10K OHM 5 1 10W 1 000 R835 061V0603105 CHIP 1MOHM 1 16W 1 000 R833 061V0603124 CHIP 120K OHM 1 16W 1 000 R847 061V0603205 CHIPR 2MOHM 5 1 10W 1 000 R814 061V0603205 CHIPR 2MOHM 5 1 10W 1 000 R827 061V0603220 CHIPR 22 OH...

Page 50: ... 1 8W 1 000 R912 061V0805103 CHIP 10K OHM 1 10W 1 000 R936 061V0805153 CHIPR 15K OHM 5 1 8W 1 000 R913 061V0805203 CHIPR 20KOHM 5 1 8W 1 000 R846 061V0805204 200K OHM 1 8W 1 000 R812 061V0805204 200K OHM 1 8W 1 000 R923 061V0805222 CHIP 2 2KOHM 5 0805 1 8W 1 000 R915 061V0805240 0F 240 OHM 1 1 8W 1 000 R927 061V0805240 1F 2 4K OHM 1 8W 1 1 000 R935 061V0805272 CHIP 2 7K OHM 1 8W 1 000 R830 061V080...

Page 51: ...061V1206470 CHIP 47OHM 5 1 4W 1 000 R919 061V1206470 CHIP 47OHM 5 1 4W 1 000 R802 061V1206471 CHIP 470OHM 1 8W 1 000 R902 061V1206684 RST CHIPR 680KOHM 5 1 4W 1 000 R901 061V1206684 RST CHIPR 680KOHM 5 1 4W 1 000 R900 061V1206684 RST CHIPR 680KOHM 5 1 4W 1 000 R841 061V1206754 CHIP 750KOHM 5 1 4W 1 000 R816 061V1206754 CHIP 750KOHM 5 1 4W 1 000 R808 061V1206754 CHIP 750KOHM 5 1 4W 1 000 R807 061V1...

Page 52: ...1 32 100PF 10 50V X7R 1 000 C844 065T0805101 32 100PF 10 50V X7R 1 000 C925 065T0805103 22 GP CHIP 0 01UF 25V X7R 0805 1 000 C941 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C939 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C928 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C924 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C918 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C917 065T0805104 32 CHIP 0 1U 50V X7R 1 000 C908 065T08...

Page 53: ...T RLZ 5 6B LLDS 1 000 ZD801 093T 39S 24 T RLZ 5 6B LLDS 1 000 AIPW2062MEF1P POWER BOARD 1 000 U601 056T 535 3 TDA7266D 1 000 Q603 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q602 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 Q601 057T 417 4 CHIP PMBS3904 BY PHILIPS 1 000 R202 061V0603000 CHIPR 0OHM 5 1 10W 1 000 C209 061V0603000 CHIPR 0OHM 5 1 10W 1 000 C210 061V0603000 CHIPR 0OHM 5 1 10W 1 000 C211 061...

Page 54: ... OHM 1 10W 1 000 R607 061V0603392 CHIP 3 9K OHM 1 16W 1 000 R610 061V0603470 CHIP 47OHM 1 16W 1 1 000 R224 061V0603471 CHIPR 470 OHM 5 1 16W 1 000 R223 061V0603471 CHIPR 470 OHM 5 1 16W 1 000 R218 061V0603471 CHIPR 470 OHM 5 1 16W 1 000 R217 061V0603471 CHIPR 470 OHM 5 1 16W 1 000 R652 061V0603473 CHIP 47K OHM 1 16W 1 000 R650 061V0603473 CHIP 47K OHM 1 16W 1 000 R209 061V0603750 CHIP 75OHM 1 16W ...

Page 55: ...603334 17 CHIP 0 33UF 16V Y5V 1 000 C225 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C220 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C221 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C222 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C223 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C224 065T0603334 17 CHIP 0 33UF 16V Y5V 1 000 C238 065T0603472 32 CHIP 4700PF 50V X7R 1 000 C237 065T0603472 32 CHIP 4700PF 50V X7R 1 ...

Page 56: ...IVET 2 000 T802 006T 31502 1 5MM RIVET 2 000 T901 006T 31502 1 5MM RIVET 4 000 IC903 056T 158 10 T IC AZ431AZ AE1 TO 92 AAC 1 000 IC904 056T 158 10 T IC AZ431AZ AE1 TO 92 AAC 1 000 C906 065T 1K152 1T 1 5NF 1KV Z5F 10 1 000 C922 067T 2152207NT GP LOW ESR 22UF 20 50V BY CHEMI 1 000 FB902 071T 55 29 BEAD 1 000 J903 071T 55 29 BEAD 1 000 F901 084T 56 1 FUSE 2A 250V WICKMANN 1 000 D816 093T 521ZJ26T SB...

Page 57: ...1 000 J910 095T 90 23 TIN COATED 1 000 J909 095T 90 23 TIN COATED 1 000 J908 095T 90 23 TIN COATED 1 000 J907 095T 90 23 TIN COATED 1 000 J906 095T 90 23 TIN COATED 1 000 J905 095T 90 23 TIN COATED 1 000 J815 095T 90 23 TIN COATED 1 000 J801 095T 90 23 TIN COATED 1 000 J802 095T 90 23 TIN COATED 1 000 J803 095T 90 23 TIN COATED 1 000 J804 095T 90 23 TIN COATED 1 000 J805 095T 90 23 TIN COATED 1 00...

Page 58: ...20 LCD TV Color Monitor AOC L20S421 58 10 PCB Layout 10 1 Main Board 715T1802 1 ...

Page 59: ...20 LCD TV Color Monitor AOC L20S421 59 ...

Page 60: ...20 LCD TV Color Monitor AOC L20S421 60 10 2 Power Board 715T1811 2 ...

Page 61: ...20 LCD TV Color Monitor AOC L20S421 61 ...

Page 62: ...20 LCD TV Color Monitor AOC L20S421 62 ...

Page 63: ...20 LCD TV Color Monitor AOC L20S421 63 10 3 Tuner Board 715T1747 1 ...

Page 64: ...20 LCD TV Color Monitor AOC L20S421 64 ...

Page 65: ...20 LCD TV Color Monitor AOC L20S421 65 ...

Page 66: ...20 LCD TV Color Monitor AOC L20S421 66 10 4 IR Board 715T1817 1 ...

Page 67: ...20 LCD TV Color Monitor AOC L20S421 67 10 5 Headphone Board 715T1381 2 10 6 Key Board 715T1822 1C ...

Page 68: ...PI5V 330W U402 PI5V 330W 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 EEPROM M24C32 VSCL VSDA IF On Off Dim IF Switch 4052 Philips LOC1 Scalar Video decoder Audio decoder MCU OSD TDA9178 Picture improve TDA7266D Audio AMP TTL TO LVDS THC63LVDM84R SAWFILTER HD Power...

Page 69: ...7B 1 3 2 R509 nc REF C403 10uF 16V ROUT FB410 B0805 0 R495 0 OHM R486 10k R485 10k R490 130 OHM R506 75 R504 75 FB412 B0805 0 REF R491 130 OHM REF R503 100 C402 10uF 16V Q406 BC847B 1 3 2 TV_R REF REF REF BOUT R493 0 OHM FB411 B0805 0 REF C472 100P R507 100 TV_G C488 33P Q401 BC847B 1 3 2 REF REF R497 4 7k TV_B C485 270P REF R484 10k R505 75 REF REF PB_CB C401 10uF 16V C404 10uF 16V R489 10k PR_CR...

Page 70: ... D_DECT SVIDEO_CTR_2 Y HDIL SVIDEO_CTR_1 SCIL1 KEYBOARD REMOTE esd J102 PHONEJACK 1 2 3 4 5 D_DECT1 SDA ASTB R133 10K CN107 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 36 39 38 40 41 42 43 44 PCIR 12V HD_Y 5V SCOR1 MOR PC AUDIO ASTB R132 15k AV1 IF 12V_SW MOL FBLIN CN101 6PIN 2 0mm 1 2 3 4 6 5 AGND S_CTL C161 100P PB_CB SCIL2 STATAV1 D_DECT3 C...

Page 71: ... 1k R522 100 ISP_SCL 03 1 IIC SWITCH AOC Top Victory Electronics Co Ltd A4 3 14 Thursday January 19 2006 Title Size Document Number Rev Date Sheet of D409 1N4148 R535 1k 5V U407 74HC4052D 12 14 15 11 1 5 2 4 6 10 9 13 3 16 8 7 X0 X1 X2 X3 Y0 Y1 Y2 Y3 EN A B X Y VDD GND VEE IIC_SEL ISP_SDA Q415 PMBS3904 3 2 1 R540 4 7k C491 100P R541 4 7k SDA ...

Page 72: ... 13 6 0 1 VDD 0 1 2 3 0 1 2 3 VEE VSS OUT OUT G4 B 5V_SW REF REF REF TXD TV_VS C481 1u R514 0 ISP_SDA C475 100P REF R523 100 R518 75 OHM D403 BAV99 1 3 2 REF REF AHSYNC D408 1N4148 1 2 ZD403 5 6V 1 2 C489 27P REF R547 2 7k R533 10k 5V_SW REF R516 0 ZD407 5 6V 1 2 C493 0 1u AVSYNC RXD R548 2 7k TV_HS REF 5V 5V ZD401 5 6V 1 2 VGA_VS VGA_VS D407 BAV99 1 3 2 U404 PI5V330W 2 3 5 6 11 10 13 1 14 8 12 9 ...

Page 73: ...9 2006 Title Size Document Number Rev Date Sheet of R273 22 C302 0 33uF C217 1 5u SIFIN1 VIFIN1 C249 0 1uF C291 0 22uF C244 0 0068uF VIFIN2 U401C LOCI T23 R23 R24 P23 P24 P25 N23 N25 N24 N26 M26 M25 M24 L23 L26 L24 K26 K25 J26 J25 H26 K24 K23 G26 H25 J24 J23 L25 H23 G25 H24 M23 VSSP2 VSSC4 VDDC4 VDDA3 VREF_POS_LSL VREF_NEG_LSR HPR VREF_POS_LSR HPR VREF_NEG_HPL HPR VREF_POS_HPR XTALIN XTALOUT VGUAR...

Page 74: ...P DVBO FMRO C307 0 47uF R226 100 REF FOR NTSC R259 10K C305 0 47uF C207 47pF PCIR R553 1 5K REF FB209 600 GND2 MOL C319 47pF R228 100 Q416 PMBS3904 3 2 1 C256 0 1uF IFVO1 C317 47pF C206 47pF SOR1 SOL1 C261 0 1uF C260 0 1uF C262 0 1uF C240 0 0039uF GND2 R261 10K Y2IN C318 47pF C201 47pF U409 UR 1 2 3 C303 0 47 C209 47pF GND2 C294 0 22uF R288 75 TUNGND CVBSO2 SOL1 AV1 GND4 C208 47pF IFVO R266 15K C2...

Page 75: ... V23 L16 W24 W23 Y24 Y23 Y25 M16 N16 N15 P15 P16 R15 L15 R16 T15 T16 T26 SVM FBISO CSY HOUT VSSCOMB VDD_COMB VIN UIN YIN YSYNC YOUT UOUT INSSW3 R Pr N3 G YIN3 B Pb N3 VP3 BCLIN BLKIN RO GO BO VDDA1 VREFAD_NEG VREFAD_POS VREFAD GNDA VDDA GND1 VDDA2 VSSadc VDDadc VOUT C278 0 1uF C214 47pF PB_CB FB216 600 C322 nc REF FB215 600 VIN FB211 600 REF R235 100 C229 10u C276 0 1uF C265 0 1uF C238 0 001uF R23...

Page 76: ...24 AA23 AC17 AD17 AE18 AD18 AC18 AF18 AF19 AE19 AC19 AC20 AF20 AE20 AF21 AE21 AD21 AC21 AC22 AF22 AE22 AD22 AF23 AE23 AC23 AD23 AD20 AF24 AE24 M15 AD19 AE25 INT0 P0 5 P1 0 INT1 P1 1 T0 VDDC2 VSSC2 P0 4 I2SWS P0 3 I2SCLK P0 2 I2SD02 P0 1 I2SD01 P0 0 I2SDI1 0 P1 3 T1 P1 7 SDA VDDP B183 P2 0 TPWM P2 1 PWM0 P2 3 PWM2 P3 0 ADC0 P3 1 ADC1 VDDC1 DECV1V8 P3 2 ADC2 P3 3 ADC3 VSSC P P2 4 PWM3 P2 5 PWM4 VDDC...

Page 77: ...IO 13 SCL GPIO 12 GPIO 4 PWM1 TCP_TDO GPIO 3 TRST VDD_IO1 VSS_CORE7 VSSA_XTAL XTAL1 XTAL0 VDD_XTAL GPIO 2 TCK VSS_CORE6 NC55 GPIO 2 T1 TD1 GPIO 0 T0 TMS T_ENABLE NC41 NC40 NC39 NC38 NC37 NC36 VSS_CORE5 VDD_CORE5 VSS_IO3 VDD_IO3 VSS_CORE4 VDD_CORE4 NC35 NC34 NC33 NC32 NC31 NC30 NC29 NC28 NC27 NC26 NC25 NC24 NC23 NC22 NC21 NC20 NC19 VSS_CORE3 VDD_IO0 VDD_IO01 KBD0 KBD1 PWM0 NC45 NC46 VDD_CORE11 NC47...

Page 78: ...3 N14 A14 N12 N11 P12 P11 P13 R11 R12 R13 R14 P14 T14 T13 T11 T12 AE17 AC16 AD16 AE16 AF16 AC15 AD15 AE15 AF15 AF14 A3 AC14 AD14 AD13 AE13 AF13 D1 AB1 AB2 AC1 AC2 AD1 AC3 AE1 AB4 AE2 AD3 AC4 A25 AF2 AE3 AD4 AF3 AC5 AE4 AD5 AF4 AE5 AC6 AF5 AD6 AE6 AC7 AF6 AD7 AE8 AE7 AC8 AD8 AF7 AF8 AC9 AD9 AE9 H2 AC10 AD10 AE10 AF10 AC11 AD11 AE11 AF11 AC12 AD12 Y4 AE12 AF12 K1 VSS_LVDS3 RSN7 RSN8 RSN9 NC14 VSS_LV...

Page 79: ...xOUT15 B0 RxOUT18 B1 RxOUT19 B2 RxOUT20 B3 RxOUT21 B4 RxOUT22 B5 RxOUT16 B6 RxOUT17 B7 RxOUT24 HSYNC RxOUT25 VSYNC RxOUT26 EN RxIN0 RxIN1 RxIN1 RxIN2 RxIN2 RxIN3 RxIN3 RxCLKIN VCC RSP6 RSN4 RSP0 DGE1 DBE4 CP404 NC 1 2 3 4 5 6 7 8 DGE6 RSN2 DGE5 RSN7 C451 10uF FB405 600 R447 100R RP404 22x 1 2 3 4 8 7 6 5 CN106 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 3...

Page 80: ...02 LM1117MP 3 3 3 2 1 4 VIN VOUT GND CASE R123 22k 3 3Vs_SW Q101 AO4411 1 2 3 4 5 6 7 8 S S S G D D D D REF R128 NC C158 0 068u FB102 NC GND4 DIG4 U103 LM1117MP 3 3 3 2 1 4 VIN VOUT GND CASE GND5 REF 1 8V_1 REF Q112 AO4411 1 2 3 4 5 6 7 8 S S S G D D D D R105 4 7K C139 0 1uF C138 0 1uF 8V For TDA9178 Picture improve R126 3 3K 12V_SW R125 22k NC 8V 12V_SW C155 1u REF Q105 BC8478 3 2 1 R104 10k PGND...

Page 81: ...v Date Sheet of 1 8VS_SW C116 100n C128 100n 3 3V_LVDS C120 100n C119 100n C114 100n C110 100n 1 8V_ADC C111 100n 3 3V_AVI FB110 BLM21A102S 1 8V_PPLL 3 3Vs_SW C124 100n C129 100n C104 22u 6v3 FB106 BLM21A102S FB107 BLM21A102S FB113 BLM21A102S C125 100n C121 100n C132 100n FB114 BLM21A102S C113 100n C127 100n 3 3Vs_SW C103 22u 6v3 1 8V_PPLL C123 100n FB112 BLM21A102S FB105 150 OHM 1 8VS_SW 1 8VS_SW...

Page 82: ...7 680K 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 PC123FY2 4P 1 2 4 3 D901 FR107 C922 4 7uF ZD902 15V SMD C916 1000uF 25V ovp Q903 PMBS3904 R906 680K 1 4W D906 RL4148 LD7552 2 3 5 7 1 4 6 8 FB Vin RT VDD GND RI SENSE GATE L903 73L 253 91L C925 0 01uF R914 0 33 2W R909 10 1 4W C907 47uF 50V C923 0 001uF 250V D910 MOSPEC20100 R9...

Page 83: ... ENA SST 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 R833 120K 0603 R838 0 0603 C821 220PF R813 22 0603 R816 750K 1206 D810 BAV99 3 1 2 C839 0 1uF C833 4 7uF 1206 X5R Q811 AM4502 1 2 3 4 5 6 7 8 S1N G1N S2P G2P D2P D2P D1N D1N Q812 AM4502 1 2 3 4...

Page 84: ... RT SCP Vcc GND 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 47K 1 16W R936 15K R930 3 6K 1 16W C929 0 1uF 50V R929 330 1 4W 12V R937 3 6K 1 16W C939 0 1uF 50V D913 RL4148 C941 0 1uF 50V ZD903 6 2V SMD PWPC2066MEF1P ...

Page 85: ... 330pF NC AUDIO1IN_R C249 NC GND GND GND AUDIO1_L R217 470 1 16W SV Au IN_L YPbPr Au IN_L C243 NC C225 0 33uF 16V AUDIO1IN_L R213 75 1 16W AUDIO1_R AUDIO2IN_L L208 120 OHM AGND AV1 IN AV1 AU IN R R224 470 1 16W L213 120 OHM R205 0 R208 75 1 16W C210 0 22uF 0 Ohm AUDIO2IN_R L210 120 OHM L212 120 OHM C227 0 33uF 16V C247 NC SV Y R212 75 1 16W R209 75 1 16W SV C C209 0 22uF 0 Ohm AUDIO2_R C224 0 33uF...

Page 86: ...ictory Electronics Co Ltd A4 2 3 Wednesday November 30 2005 Title Size Document Number Rev Date Sheet of C233 33nF L218 47u R607 3 9K ZD408 5 6V R603 0 C236 4 7nF C237 4 7nF Q603 PMBS3904 3 2 1 R605 10K 5V R609 4 7K 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 VS ADC IF2 NC2 IF1 C240 47uF R606 22 L202 150 5V SCL R610 47 IF R602 10 SDA ...

Page 87: ...YPbPr Au IN_L 03 RevCode CONNECTOR AOC Top Victory Electronics Co Ltd A4 3 3 Wednesday November 30 2005 Title Size Document Number Rev Date Sheet of Y SV Au IN_R YPbPr Au IN_R AV1 AU IN L SWAP Pr with Y CN601 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 36 39 38 40 41 42 43 44 IF ASTB ...

Page 88: ... SPEAKER 1 2 3 R612 1K 1 16W ROUT R611 12K 1 16W C624 100pF R625 4 7K 1 16W C601 100pF HP_SENSE FB602 120 OHM C614 0 47uF 16V FB603 120 OHM LOUT C617 0 47uF 16V R614 33K 1 16W Q602 MMBT3904 1 3 2 HP_SENSE HP_R ROUT HP_R R627 1K 1 16W C607 220uF 25V HP_L R628 100k CN605 5PIN 2 0mm 1 2 3 4 5 C619 0 47uF 16V C602 1000uF 16V MOR LOUT C606 100pF FB606 120 OHM C622 220uF 25V R626 1K 1 16W C613 0 47uF 16...

Search results

Summary of Contents for Envision L20S421

Reviews:

Related manuals for Envision L20S421

Brands by name

Popular brands

AOC Envision L20S421, Service Manual

Search results

Summary of Contents for Envision L20S421

Reviews:

Related manuals for Envision L20S421

Brands by name

Popular brands