Table of Contents
Advertisement
Quick Links
42"LCD TV
Service
Service
Service
Description
Table Of Contents............................................... . .........1
Important Safety Notice...................................................2
Revision List.........................................................3
1. General Specification...........................................4
2. Operating Instructions.......... ... ... ... ... .............5
3. Input/Output Specification.......................................15
4. Mechanical Instructions.........................................17
5.Factory Model................................... . . . . . . . .......20
6.ISP Upgrade...................................... . . ............21
7.Repair Flow Chart ....................................... .......23
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
TABLE OF CONTENTS
SAFETY NOTICE
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
Page Description
8.PCB Layout .................................... . . . . . . . . . . . ..27
9. Block Diagram............................................ . . . . .......34
10. Schematic.....................................................35
11.Location wave form andVoltage.....................58
12. Analog input auto calibration...... ........ . . . ... ..........62
13. Exploded View............................................. . ..64
14. BOM List...................................... .................66
1
VT420M
MODEL：VT420M
Page
Advertisement
Table of Contents
Related Manuals for Vizio VT420M
Summary of Contents for Vizio VT420M
-
Page 1: Table Of Contents
42″LCD TV VT420M Service MODEL：VT420M Service Service TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…...1 8.PCB Layout …………………......27 Important Safety Notice........……..2 9. Block Diagram.……..........34 Revision List…………………………………………………3... -
Page 2: Important Safety Notice
42″LCD TV VT420M Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. -
Page 3: Revision List
42″LCD TV VT420M Revision List Version Release Date Revision Instructions TPV Model May-12-09 Initial Release E429MDNKCWVZNNS... -
Page 4: General Specification
42″LCD TV VT420M 1. General Specification Display panel Panel Model : V420H1 – LH5 Active Area : 930.24(H) x 523.26 (V) 42.02” diagonal Outline Dimension : 983（H）x 576（V）x 50.8 mm（D）Typ. Pixel Pitch : 0.4845mm x 0.4845mm Pixel Format : 1920 X 1080 (Full HD), RGB strip arrangement Color Depth : 10–... -
Page 5: Operating Instructions
42″LCD TV VT420M 2. Operating Instructions 2.1 The Use of Remote Control Press to turn on/off the TV from or to standby mode POWER: Press to select TV/AV/Comp1/Comp2/ HDMI1/HDMI2/ HDMI3/HDMI INPUT: 4/VGA/Photos/Music Press to select TV input Press to select AV input... - Page 6 42″LCD TV VT420M 2.2 To Use the Menus 1. Press the MENU button on the remote control or the side of the TV and the OSD menu will be shown on the screen. 2. Press the UP and Down arrow buttons on the remote control buttons or the CH + or CH – buttons on the side of the HDTV to select one of the other menu options.
- Page 7 42″LCD TV VT420M signal for channels. Under this option, you will find the following choices and features: Master List, Additional Scan, Scan Channels and Channel Name Edit. Picture This option will display all parameters which setting values would produce the video quality to the end user’spreference.
- Page 8 42″LCD TV VT420M The following options are available in the Photos menu: Browse Photos This option switches to Photos mode in a browse view screen, allowing the user to see thumbnails of the photos, if available. View Slideshow This option switches to Photos mode and starts the slide show displaying the images in your USB storage device.
- Page 9 42″LCD TV VT420M The following options are available in the TV menu: Master List After your HDTV has stored all of the available channels in memory, you can skip channels from the channel list that you do not want to see and which signals are not strong enough to produce a good picture. You can still tune to skipped channels using the numbered keys on the remote control.
- Page 10 42″LCD TV VT420M The following options are available in the Picture menu: Picture Settings Select Home, Movie, Vivid, Game and Custom. View Mode This option lets you determine how the image appears on the screen. Select Normal, Expanded, Full Screen, or Panoramic.
- Page 11 42″LCD TV VT420M SRS TruSurround HD Turn the simulated surround feature On or Off. SRS TruVolume When the programming switches to a commercial or when changing from channel to channel, volume fluctuations occur. The SRS TruVolumeTM provides the listener with a comfortable and consistent volume level.
- Page 12 42″LCD TV VT420M Ratings Locks This option allows blocking channels based on the ratings established by regulations. Channel Locks This option allows blocking channels no matter what content. User Control Lock This option allows blocking the usage of the controls panel on side of your HDTV.
- Page 13 42″LCD TV VT420M 2.3 Connector 2.3.1 Rear signal • Component Video In & Audio L/R In ( Cinch, COMP1/COMP2) • D_SUB in & Phone jack In • Coaxial aerial I/P (TV input)– F-type ( 75 Ω ) • HDMI1/HDMI2/HDMI3 In •...
-
Page 14: Front Panel Control Knobs
42″LCD TV VT420M 2.4 Front Panel Control Knobs Remote control sensor- this is the window through which all of the remote control signals pass to the sensor. Point the remote control directly at this window for the best response to the remote signal. -
Page 15: Input/Output Specification
42″LCD TV VT420M 3. Input/Output Specification 3.1 RGB Signal input 15 - Pin Color Display Signal Cable Pin No. Description Pin No. Description Red Video Mandatory +5V Supply for PC Bypass Green Video Sync Ground Blue Video SDA(Remote Control) SCL(Remote Control) - Page 16 42″LCD TV VT420M 3.3 Video input format Frequency Physical Inputs Resolution NTSC from RF 720 x 480 AV ( Side AV: CVBS and Y/C) 720 x 480 YPbPr X2 720 x 480 720 x 480 1280 x 720 1920 x...
-
Page 17: Mechanical Instructions
42″LCD TV VT420M 4. Mechanical Instructions 1. Remove four screws to remove the base. 2. Remove twenty-three screws to remove the rear cover. 3. Remove five screws and unplug four connectors to remove the scaler board. - Page 18 42″LCD TV VT420M 4. Remove five screws and unplug two connectors to remove the power board. 5. Remove the screw and the connector to remove the IR board. 6. Remove two screws and the connector to remove Key Board. 7. Remove four screws to remove two speakers.
- Page 19 42″LCD TV VT420M 8.Remove twenty-eight screws to remove the metal frame and the bezel assy. . 9.The panel...
-
Page 20: Repair Flow Chart
42″LCD TV VT420M 7. Repair Flow Chart 1. No Power (No LED indicator) Plug in power cord and interface Check power cord and board interface Check F703 C701 C719 C727 Replace F703 C701 C719 C727 Check U702 C724 C708 C738... - Page 21 42″LCD TV VT420M 3. No display (LED indicator White) (A)U401 X243 don’t work Repair the key board Check key board Check “+5V” Q702 Q708 Replace Q702 Q708 Check U703 all power, R761 Replace NG components Check U401 ,U403 all power Replace NG components Check X402 = 54.1MHz...
-
Page 22: Abnormal Display
42″LCD TV VT420M 4. Abnormal display Reset source Check the source Check IO signal filter circuit Replace the filter or inductance Check HDMI U513 and HDMI signal Replace around component TV signal Check Tuner power and TV system setup Check panel Replace panel 5. -
Page 23: Key Board
42″LCD TV VT420M 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 Replace Key Pad Board Is Key Pad Board Normally? Check Main Board... -
Page 24: Exploded View
42″LCD TV VT420M 13.Exploded View... - Page 25 42″LCD TV VT420M E429MDNKCWVZNNS ITEM DESCRIPTION 18NC A34T1276 1101A DECO BEZEL IRPF8AA6 IR BOARD A33T0657 1101A KEY PAD KEPF9ZA3 KEYPAD BOARD A34T1277 1101A BEZEL 750TVM420HH513N0WD PANEL A15T0788101 Stand Bracket S_M ADTV82421AAD POWER BOARD CBPF9D1KZ1 MAIN BOARD 705GZ934134 COVER-SIDE-IO_ASSY A34T1278 1101A...