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Vizio VO420E Service Manual

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Service Manual

Model #: VO420E
LGD_LC420WUG-SBR1-7R1
(T42USVZB1RF-.VO420E1)
AMTRAN TECHNOLOGY CO., LTD.
17F, NO. 268, Lien Chen Rd., Chung Ho City Taipei County, Taiwan, 235 R.O.C.
TEL : (02) 8228-0505
FAX : (02) 8228-0599
Confidential Document, Property of AmTRAN CO. LTD

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Summary of Contents for Vizio VO420E

  • Page 1: Service Manual

    Service Manual Model #: VO420E LGD_LC420WUG-SBR1-7R1 (T42USVZB1RF-.VO420E1) AMTRAN TECHNOLOGY CO., LTD. 17F, NO. 268, Lien Chen Rd., Chung Ho City Taipei County, Taiwan, 235 R.O.C. TEL : (02) 8228-0505 FAX : (02) 8228-0599 Confidential Document, Property of AmTRAN CO. LTD...
  • Page 2 Table of Contents CONTENTS PAGE Sections 1. Features 2. Specifications 3. On Screen Display 4. Factory Preset Timings 5. Pin Assignment 6. Main Board I/O Connections 7. Theory of Circuit Operation 8. Waveforms 9. Trouble Shooting 10. Block Diagram 10-1 11.
  • Page 3 Service Manual VO420E_LGD COPYRIGHT © 2000 V, INC. ALL RIGHTS RESERVED. IBM and IBM products are registered trademarks of International Business Machines Corporation. Macintosh and Power Macintosh are registered trademarks of Apple Computer, Inc. VINC and VINC products are registered trademarks of V, Inc. VESA, EDID, DPMS and DDC are registered trademarks of Video Electronics Standards Association (VESA).
  • Page 4 Chapter 1 Features Built in TV channel selector for TV viewing Simultaneous display of PC and TV images Connectable to PC’s analog RGB port Built in HDTV, composite video, S-Video ,HDMI ,ATV out and DTV out ,Audio line out, Audio optical out Built in auto adjust function for automatic adjustment of screen display Smoothing function enables display of smooth texts and graphics even if image with resolution lower than 1920x1080 is magnified...
  • Page 5 Chapter 2 Specification 1. TFT LCD CHARACTERISTICS 47.0”WUXGA TFT LCD Item Specification Active Screen Size 42.02 inch (1067.31mm) diagonal Outline Dimension 983.0(H) x 576.0(V) x 49.7mm Pixel Pitch 0.4845 mm x 0.4845 mm Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement Color Depth 8-bit, 16.7 M colors Luminance, White...
  • Page 6 6. ENVIRONMENT Operating Temperature: 5c~35c (Ambient) Operating Humidity: Ta= 35 °C, 90%RH (Non-condensing) Operating Altitude: 0 - 14,000 feet (Non-Operating) 7. Dimensions (Physical dimension) With Base Without Base a. Height 700mm 665.7mm b. Width 1024.5mm 1024.5mm c. Depth 243.5mm 96mm 8.
  • Page 7 with chemical treatment. Do not touch the surface of polarizer for bare hand or greasy cloth.(Some cosmetics are detrimental to the polarizer.) (7) When the surface becomes dusty, please wipe gently with absorbent cotton or other soft materials like chamois soaks with petroleum benzine. Normal-hexane is recommended for cleaning the adhesives used to attach front / rear polarizers.
  • Page 8 9-3. Electrostatic Discharge Control Since a module is composed of electronic circuits, it is not strong to electrostatic discharge. Make certain that treatment persons are connected to ground through wrist band etc. And don’t touch interface pin directly. 9-4. Precautions for Strong Light Exposure Strong light exposure causes degradation of polarizer and color filter.

  • Page 9: On Screen Display

    Chapter 3 On Screen Display Main unit button Power MENU CH ▲ CH ▼ VOL + VOL - Input On Screen Display TV Source A. Picture： a. Picture Mode (Custom/ Standard / Movie / Game) b. Backlight (0~100) c. Brightness (0~100) d.
  • Page 10 e. Speakers (On/Off) Analog Audio Out (Fixed/Variable) g. Lip Sync (0~5) C. TV： a. Tuner Mode (Antenna/Cable) b. Auto Search c. Partial Channel Search c-1. Scan Mode (“Analog/Digital”/Analog/Digital) c-2. From Channel (Cable 1~135 / Antenna 2~69) c-3. To Channel (Cable 1~135 / Antenna 2~69) d.
  • Page 11 g. H/V Position g-1. H.Position (0~64) g-2. V.Position (0~32) g-3. H.Size (0~100) g-4. V.Size (0~100) h. Reset All Setting E. Parental： a. PASSWORD RGB Mode A. Picture： a. Auto Adjust (Run) b. Backlight (0~100) c. Brightness (0~100) d. Contrast (0~100) e.

  • Page 12: Hdmi Mode

    C. Setup： a. Language (English/Francais/Espanol) b. Sleep Timer (Off/30 Minutes/60 Minutes /90 Minutes /120 Minutes) c. Wide (Full/Normal) d. Input Naming (AV1/AV2/Comp1/Comp2/RGB/HDMI1/ HDMI2/ HDMI3) e. Reset All Setting HDMI MODE A. Picture： a. Picture Mode (Custom/ Standard / Movie / Game/Vivid/Football/Golf/Basketball/baseball) b.
  • Page 13 C. Setup： a. Language (English/Francais/Espanol) b. Sleep Timer (Off/30 Minutes/60 Minutes /90 Minutes /120 Minutes) c. Wide (Full/Zoom1/Stretch) d. Input Naming (AV1/AV2/Comp1/Comp2/RGB/HDMI1/ HDMI2/ HDMI3) e. H/V Position e-1. H.Position (0~64) e-2. V.Position (0~32) e-3. H.Size (0~100) e-4. V.Size (0~100) Reset All Setting Video Sources：...
  • Page 14 B. Audio Mode：(Flat/Rock/Pop/Classic/Jazz) a. Equalizer b. Balance (-50~50) c. SRS TSHD (On/Off) d. Digital Audio Out (Dolby Digital/PCM/Off) e. Speakers (On/Off) Analog Audio Out (Fixed/Variable) g. Lip Sync (0~5) C. Setup： a. Language (English/Francais/Espanol) b. Sleep Timer (Off/30 Minutes/60 Minutes /90 Minutes /120 Minutes) c.
  • Page 15 Chapter 9 Trouble shooting MONITOR DISPLAY NOTHING (PC MODE) Start Is Power board output +5VSB &+12? LED is lighted? Is J4 connector good? Is DC to DC OK? Is U1 (+5V) working ok? It is in power saving Check video cable Is the timing supported? LED is lighting? Check sync input...
  • Page 16 (TV, COMPOSITE ,VIDEO ) IS NOT DISPLAY CORRECTLY Start 1. Check video Input signal good? 2. Check DVD player 1. Check VIDEO signal 2. Check signal between U12 (IF IN AV U12 input correct? mode) 1. Check U12 :DV33&DV10&AV33&AV12 2. Check Y1 is OK? U12 output correct? 1.
  • Page 17 (COMPONENT) IS NOT DISPLAY CORRECTLY Start 1.Check video Input signal good? 2.Check host’s setting 1.Check signal between P2 P2 input correct? 2.Check power 12V& 5v 1.Check signal between U14&P1 2.Check U13 Clock (60MHZ) U13 input correct? 3.Check U13 :DV33&DV10&AV33&AV12 1.Check U12 LVDS output correct ? 2.
  • Page 18 HDMI ) IS NOT DISPLAY CORRECTLY Start 1.Check video Input signal good? 2.Check host’s setting 1.Check U12 power 2.Check between signal U12 U12 no data out ? 3.Check U12 clock 60MHZ 1.Is TCN3 & TCN4 connected good? 2.Is panel working ok? –...
  • Page 19 TROUBLE OF DC-DC CONVERTER Start The voltage is 5VSB 1. Check power board 2. Check power cable connection J4 J4 PIN10,11,12 The voltage is +12V while power switch on 1. J4 connection good 2. Check power board J4 PIN 2,3,4 The voltage is +5V while power switch on U1 pin 5 6 7 8 1.
  • Page 20 TROUBLE OF DDC READING Start Support DDC1/2B Analog DDC OK? 1. VGA cable ok? 2. Check signal (U22 to P1) 3. Check U22 Voltage 4. Is compliant protocol? Support DDC1/2B 1. HDMI cable ok? HDMIDDC OK? 2. Check signal (U19 to P9) 3.
  • Page 21 (TV_SIDE, AUDIO) IS NOT DISPLAY CORRECTLY Start 1. Check Audio source Input signal good? 2. Check the player of source 1. Check signal of Main Board 2. Check amplifier (J5) Input correct? Check MT8380 audio out ,R578 & R580 Check signal correct? Check 12V of U33 Check amplifier OK? –...