Vizio VF550XVT1A - 55" LCD TV Service Manual Download

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Service Manual

V, Inc

320A Kalmus Drive Costa Mesa, CA 92626

TEL : +714-668-0588 FAX :+714-668-9099

Top Confidential

Model #: LCD TV Monitor 55''

VF550XVT1A

(LGD_LC550WUD-SBA1)

Summary of Contents for VF550XVT1A - 55" LCD TV

Page 1: ...Service Manual V Inc 320A Kalmus Drive Costa Mesa CA 92626 TEL 714 668 0588 FAX 714 668 9099 Top Confidential Model LCD TV Monitor 55 VF550XVT1A LGD_LC550WUD SBA1...

Page 2: ...y 3 1 4 Factory Preset Timings 4 1 5 Pin Assignment 5 1 6 Main Board I O Connections 6 1 7 Theory of Circuit Operation 7 1 8 Waveforms 8 1 9 Trouble Shooting 9 1 10 Block Diagram 10 1 11 Spare parts l...

Page 3: ...o communications However there is no guarantee that the interference will not occur in a particular installation If this equipment does cause unacceptable interference to radio or television reception...

Page 4: ...y 6 High quality 1920X1080 pixel by pixel display 7 Smoothing function enables display of smooth texts and graphics even if image with resolution lower than 1920X1080 is magnified 8 Advanced video fun...

Page 5: ...re treatment of the front polarizer Haze 10 2 TFT LCD OPTICAL CHARACTERISTICS Contrast ratio 1400 Typ _ LGD LC550WUD SBA1 Surface Luminance White 500 cd m2 Typ Luminance Variation 1 3 Max Response Tim...

Page 6: ...e pay attention to the followings when you use this TFT LCD module 1 OPERATING PRECAUTIONS 1 The spike noise causes the mis operation of circuits It should be lower than following voltage V 200mV Over...

Page 7: ...l darkness may happen during 3 5 minutes when LCM is operated initially in condition that luminance is under 40 at low temperature under 5 This phenomenon which disappears naturally after 3 5 minutes...

Page 8: ...ovie Game Vivid Football Golf Basketball Baseball 1 1 Backlight 0 100 1 2 Brightness 0 100 1 3 Contrast 0 100 1 4 Color 0 100 1 5 Tint 32 32 1 6 Sharpness 0 7 1 7 Advanced Video 1 7 1 Noise Reduction...

Page 9: ...r Temperature 1 5 1 Color Temperature 6500 9300 Custom 1 5 2 Red 0 255 1 5 3 Green 0 255 1 5 4 Blue 0 255 1 6 H Size 0 255 1 7 H Position 0 100 1 8 V Position 0 100 1 9 Fine Tune 0 31 AUDIO 2 0 Audio...

Page 10: ...tion TL BR 4 2 4 PIP Size Small Medium Large 4 2 5 Audio Source Main or PIP 4 3 Sleep Timer Off 30Minutes 60Minutes 90Minutes 120Minutes 4 4 Wide DTV Wide Zoom Stretch Others Wide Zoom Panoramic Norma...

Page 11: ...TV Y All 4 8 3 2 TV Y7 All FV 4 8 3 3 TV G All 4 8 3 4 TV PG All D L S V 4 8 3 5 TV 14 All D L S V 4 8 3 6 TV MA All L S V 4 8 4 US Movie Rating 4 8 4 1 G 4 8 4 2 PG 4 8 4 3 PG 13 4 8 4 4 R 4 8 4 5 N...

Page 12: ...ile No SG 0292 SETUP 4 8 8 Block Unrated TV Yes No 4 8 9 Access Code Edit 4 8 9 1 New 4 8 9 2 Confirm 4 10 System Reset INFO INFO button could show an information bar which displays the information ab...

Page 13: ...VSB F1 2 Is J1 connector of MB good 3 Is DC DC OK 4 Is U22 pin2 3V3SB working ok LED is lighting It is in power saving 1 Check video cable 2 Is the timing supported 3 Check sync input 4 Check VGA SOG...

Page 14: ...eck DVD player U13 input correct 1 Check P14 signal 2 Check signal between P14 and U13 IF AV1 mode 3 Check Tuner U13 IF TV mode 4 Check P15 IF AV2 mode 5 Check U13 POWER 3 3V LVDS output correct 1 Che...

Page 15: ...Check video 2 Check host s setting P15 input correct 1 Check signal from P15 2 Check system power 12V 5V 5VSB U13 input correct 1 Check signal between U13 P3 or P15 2 Check Y1 Clock 60MHZ Is LVDS outp...

Page 16: ...good 1 Check video 2 Check host s setting P20 input correct 1 Check P20 connect MB 2 Check system power 12V 5V 5VSB U13 input correct 1 Check signal between U13 P20 2 Check Y1 Clock 60MHZ Is LVDS outp...

Page 17: ...2 3 1 IS NOT DISPLAY CORRECTLY Input signal good Start 1 Check video 2 Check host s setting 1 Check P19 P17 P18 connect 2 Check the pin18 19 3 Check the pin 6 of U62 U63 U64 U13 no data out 1 Is J12...

Page 18: ...I 4 5 IS NOT DISPLAY CORRECTLY Input signal good Start 1 Check video 2 Check host s setting 1 Check P8 P9 connect MB 2 Check the pin10 11 of P16 MB 3 Check the pin 6 of U11 U7 U13 no data out 1 Is J12...

Page 19: ...3V 3V3SB 3 Check power board 4 Check F2 U51 pin 5 6 7 8 The voltage is about 5V while power switch on 1 Check F1 U51 2 Check OPWRSB R19 3 Check U51 pin1 2 or pin 3 4 should have 1V more U15 The voltag...

Page 20: ...Support DDC1 2B 1 Analog cable ok 2 Check signal U31 to U43 3 Check U31 Voltage 4 Is protocol compliant Is HDMI DDC OK Support DDC1 2B 1 Analog cable ok 2 Check signal U59 to P18 3 Check signal U57 t...

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