Service Manuals, User Guides, Schematic Diagrams or docs for : CHANGHONG LCD LS0B chassis Changhong+chassis+LS0B

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Changhong+chassis+LS0B


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               LCD/PDP TV



             MODEL: LS0B CHASSIS




               SERVICE MANUAL
            (18.5 inches LED TV as an exampleGeneral version)




Please read this manual carefully before service.
                                                            CATALOG
Chapter1:Safety and notes .......................................................................................... 3
      1.1 Installation notes .................................................................................................................3
      1.2 Attention points of operation and using ..............................................................................3
      1.3 Storage notes .......................................................................................................................3
      1.4 Dismantling notes ...............................................................................................................3
      1.5 High-voltage warning .........................................................................................................3
Chapter2: Whole machine standard and terminal functions .................................. 4
      2.1 Basic standard .....................................................................................................................4
      2.2 Introduction of terminals(practicality photos).....................................................................5
Chapter3:Main chip functions and brief introductions of power supply ...............6
      3.1 MAIN IC and functions of LS0B........................................................................................6
      3.2 Pin function description of LS0B chip................................................................................6
      3.3 Brief introduction of power supply ...................................................................................10
Chapter4: The chassis frame diagram, mainboard power supply systems,
mainboard interface definition and the waveform of key points .......................... 11
      4.1 The chassis frame diagram................................................................................................11
      4.2 Power supply system.........................................................................................................11
      4.3 The waveform of key points .............................................................................................13
Chapter5: Software upgrade tooling,software upgrade instructions,software
initialization,parameter setting,software version and screen matching
instructions ................................................................................................................. 14
      5.1 Software upgrade tooling ..................................................................................................14
      5.2 Software upgrade instructions...........................................................................................14
      5.3 Software initialization .......................................................................................................18
      5.4 Software version ...............................................................................................................19
Chapter6:Classical accident maintenance procedures and examples................... 20
      6.1 Clues of can't boot ............................................................................................................20
      6.2 Common problems for your reference: .............................................................................22
Chapter7: Spare Part Lists ....................................................................................... 23
Chapter8: Factory mode parameter setting instructions and notes .........................24
      8.1 Enter into the factory mode...............................................................................................24
      8.2 Setting method of factory menu ........................................................................................26
Chapter9:Instructions of simple factory debugging specification......................... 27
      9.1 Clear EEPROM ,and set the parameters after upgrading according to the upgrade
      instructions..............................................................................................................................27
      9.2 Check each channel/source to see if the image and sound are normal..............................27




                                                                                                                                                2
                             Chapter 1: Safety and notes
1.1 Installation notes
(1) Please don't beat or rub, scratch the surface of the LCD screen heavily, don't touch it with
hand casually.
(2) When the screen is dirty, please clean it with absorbent cotton or cotton cloths lightly.
(3) Please clean the screen timely when water or other viscosity pollution falls on it, which may
make the LCD face or color changes.
(4) Please don't make the LCD screen shocked by a strong external force.


1.2 Points of operation and using for attention
(1) Please unplug the power cable before moving LCD screen.
(2) Please don't change the mainboard's original setting; otherwise brightness, white balance etc.
may not meet the specification.
(3)The amount of radiation of long time use at room temperature is larger than that at low
temperature.
(4) Please note that the long displaying image may remain at the top when shutdown the
machine.
(5) Please avoid the impact from mobile phone to protect your TV.


1.3 Storage notes
(1)When store for a long time, please keep the temperature between 0to 40, don't expose the
TV to the sun , the humidity should be less than 85RH.
(2)Please don't put your TV under high humidity and high temperature circumstance, e.g.
temperature: 60, humidity:85%RH.
(3)Please don't put your TV under low temperature circumstance, e.g. temperature lower than
25.


1.4 Dismantling notes
(1) As LCD screen can be damaged easily when dismantle, please pay attention to protect it.
(2)Please pay attention to the position of each screw when dismantle in case of beating the wrong
    position when install which may lead to crack or slide of the face frame.
(3) If you need to dismantle the power board or the main board, please attention the position and
    direction of each line, especially the direction of the screen line, in case of causing accident
    when install. Before dismantle, we can take some photos of the line routes for the comparison
    of installing.
(4)After check and maintenance, please assure that there is no foreign body in the machine when
  install.


1.5 High-voltage warning
The high-voltage of the LCD screen is generated by the power supply step-up board, without
attention to exposure to high voltage; one may meet a serious electric shock.




                                                                                                  3
      Chapter2: Whole machine standard and terminal functions
2.1 Basic standard

                item                                standard
                   visual area       18.5 inchesdiagonal (CPT)
                   aspect ratio      16:9
                   resolving ratio   1366 x768                                the parameters are
                   visual area H x V 409.8m m (H) 



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