Vizio VF550XVT1A - 55" LCD TV Service Manual Download Page 20

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CONFIDENTIAL – DO NOT COPY

Page 9-8

File No. SG-292

Yes

TROUBLE

EDID

READING

Start

Is Analog DDC OK?

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 to P19)
4. Check signal (U58 to P17)
5. Check signal (U33 to P8)
6. Check signal (U25 to P9)
7. Is protocol compliant?

END

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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