Service Manuals, User Guides, Schematic Diagrams or docs for : TOSHIBA LCD 40YL743 схема и сервис мануал на английском Toshiba 40YL743 Ver. 2.00 (1)

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схема и сервис мануал на английском Toshiba 40YL743 Ver. 2.00 (1)


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SERVICE MANUAL




            LCD Color Television

          40YL743                  Ver. 2.00
     ADJUSTMENT


Service Mode

Entering to Service Mode

  


                                     1. Press     button once on remote control.  



                                




                                  
                                  
                                  

                                     2. Press     button again and hold button down.  



                                




                                  
                                  
                                  
       Service Mode display       

                                     3. While holding the      button, press MENU 
                                        button on TV set.  
                                
  


Displaying the Adjustment Menu

Press MENU button on TV. 

          Service Mode




                 
        Press   Press
                
        Adjustment Mode




  
Key Function in the Service Mode

The following key entry during display of adjustment menu provides special functions. 


     CAUTION: Never try to perform initialization unless you have changed the
     memory IC.


  

 Test signal selection                             button (on remote control)

 Selection of the adjustment items             P          (on TV or remote control)

 Change of the data value                      Volume        +/- (on TV or remote control)

 Adjustment menu mode ON/OFF                   MENU button (on TV)

 Initialization of the memory                  "i+" + P    button on TV

 Turn off TV Micro I2C bus communication       "i+" + Volume      button on TV

 "RCUT" selection                              1 button

 "GCUT" selection                              2 button

 "BCUT" selection                              3 button

 "CNTX" selection                              4 button

 "COLC" selection                              5 button

 "UVTT" selection                              6 button

 Automatic A/D Adjustment
                                               7 button
 (PC, Component, Composite (PAL, NTSC))

 Self diagnostic display ON/OFF                9 button


  


Selecting the Adjusting Item

Every pressing of PROGRAMME   button in the Service Mode changes the adjustment 
items in the order of table below. (  button for reverse order) 


SETTING & ADJUSTING DATA
[ SERVICE MODE ] 

ADJUSTING ITEMS IN THE SERVICE MODE: 

     Item     Name of adjustment
 R-CUT RED CUTOFF

 G-CUT GREEN CUTOFF

 B-CUT BLUE CUTOFF

 R-DRV RED DRIVE

 G-DRV GREEN DRIVE

 B-DRV BLUE DRIVE

 BRTC       BRIGHTNESS CENTER

 COLC COLOR CENTER

 UVTT       BASE BAND TINT

 CNTX       CONTRAST MAX

 MOID       MODEL ID

 PLVN       PANEL VENDOR

 PLSZ       PANEL SIZE

 OPT5       OPTION DATA 5

 OPT2       OPTION DATA 2

 OPT6       OPTION DATA 6

 OPT7       OPTION DATA 7

 OPT8       OPTION DATA 8

 HTLID HOTEL ID

 VOLX       MAXIMUM VOLUME LEVEL


The listed items are set to proper values after setting the correct Model ID data (Refer to 
Initialization of TV Micro). 

  


Adjusting the Data
Pressing of VOLUME    +/- button will change the value of data in the range from 00H to 
FFH. The variable range depends on the adjusting item. 

  


Convert from Bit (Binary) to Hex

The table for converting from bit (D7-D0) to hex (0x**). 

                                 BIT (Binary)

 High nibble              D7       D6      D5       D4
 Low nibble               D3       D2      D1       D0
 HEX             0         0        0       0        0

                 1         0        0       0        1

                 2         0        0       1        0

                 3         0        0       1        1

                 4         0        1       0        0

                 5         0        1       0        1

                 6         0        1       1        0

                 7         0        1       1        1

                 8         1        0       0        0

                 9         1        0       0        1

                 A         1        0       1        0

                 B         1        0       1        1

                 C         1        1       0        0

                 D         1        1       0        1

                 E         1        1       1        0

                 F         1        1       1        1

E.g. If Bit D7-0 = 0101 1010, Hex data is 0x5A. 

  
Exit from Service Mode

Pressing POWER button to turn off the TV once. 

  


Initialization of TV Micro Data

After replacing Digital Board, the following initialization is required. 

 1)  Enter Service Mode. 
  
 2)  Select menu of MOID by pressing P  or P  during display of adjustment menu in the 
     Service Mode. 
  
 3)  Change MOID data into MODEL ID to initialize by pressing   + or   -, refer to 
     "MODEL ID TABLE". 
     For example, if initializing 32VL743, change MODEL ID into "0x17". 
      Note: 
      MODEL ID is hex value. 
  
 4)  Execute initialization of the memory. 
     Refer to "KEY FUNCTION IN THE SERVICE MODE". 
     Press "i+" + P  button on TV. 
  
 5)  TV is automatically turned off and on after the memory initialization is completed. 
  
 6)  Enter Service Mode and select Version Check Mode. Confirm if the MODEL ID 
     corresponding to the model name is set correctly. If not, do over again from the start. 
      Note: 
      If the wrong MODEL ID is set, abnormal display might appear. 
  
MODEL ID TABLE 

                    Model ID      Panel        Panel Inch   Panel Vendor         Option Data
     Model Name
                     (HEX)       Vendor       Size ID (HEX)   ID (HEX)          (OPT5) (HEX)
 32VL743/YL743        0x17      SAMSUNG            0x05             0x06             0x00
 40VL743/YL743      0x18      SUMSUNG                0x0e       0x06             0x00
 46VL743/YL743      0x19      SAMSUNG                0x0a       0x06             0x00

  


Initializing Data setting flowchart after replacing the Signal Unit




                                              

  


Test Signal Selection

Every pressing of   button on the remote control changes the built-in test patterns on 
screen as described below in Service Mode. 
  




                                                  
  


        Picture           Signal



                       Red raster




                       Green raster




                       Blue raster




                       All Black




                       All White




  


Self Diagnostic Function

     1. Press "9" button on remote control during display of adjustment menu in the Service 
        Mode. The diagnosis will begin to check if interface among IC's is executed properly.  

     2. During diagnosis, the following displays are shown.  

* Self check displays and items are subject to the models. 
                                                                           

           Item                             Explanation/Data Format
 1 TV CPU SW          Version information of TV-MICRO. Display 1 byte data. (Hex)
   Version

 2 EEPROM Version Version information of TV-MICRO EEPROM. Display 1 byte data.
                      (Hex)

 3 POT                Total time the TV has been powered on. (Unit: Hours) (Decimal)

 4 MAIN PLL           Displays Data 11 - Data 18 (8 bytes) of tuner control data. (Hex)

 5 BL_STATUS 1        The total number of times that the panel did not light. (backlight
                      double-light also failed) (Decimal)

 6 BL_STATUS 2        The number of times that the backlight failed to light. (Decimal)

 7 Block              UV                 : ATV reception mode
                      V1 



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