Service Manuals, User Guides, Schematic Diagrams or docs for : Vizio Vizio_VT420M_[SM]

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Vizio_VT420M_[SM]


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42LCD TV                                                                                                                                  VT420M




Service                                                                                                                 MODELVT420M
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 10. Schematic.....................................................35
1. General Specification...........................................4            11.Location wave form andVoltage.....................58
2. Operating Instructions.......... ... ... ... ... .............5 12. Analog input auto calibration...... ........ . . . ... ..........62
3. Input/Output Specification.......................................15          13. Exploded View............................................. . ..64
4. Mechanical Instructions.........................................17           14. BOM List...................................... .................66
5.Factory Model................................... . . . . . . . .......20
6.ISP Upgrade...................................... . . ............21
7.Repair Flow Chart ....................................... .......23




                                    SAFETY NOTICE
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
                                   ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

         CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING



                                                                           1
42LCD 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. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.

WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might 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 radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person's body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)




                                                            2
42LCD TV                                                           VT420M
                            Revision List

   Version   Release Date   Revision Instructions      TPV Model

    A00       May-12-09         Initial Release     E429MDNKCWVZNNS




                                  3
42LCD TV                                                                                       VT420M
1. General Specification

   Display panel

   Panel Model                  : V420H1 



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