KDE-55XBR950 (serv.man2) - Sony TV Service Manual (repair manual). Page 9

 

 

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(2) Video Signal Definition and Function 

The table below summarizes the definitions and functions of input video signals before LVDS 
conversion. 

Video signal 
(ODD) 

DATA-RA 
DATA-GA 
DATA-BA 

10 
10 
10 

Input 

Display data signal 
RA9/GA9/BA9 is the highest intensity bit. 
RA0/GA0/BA0 is the lowest intensity bit. 

Video signal 
(EVEN) 

DATA-RB 
DATA-GB 
DATA-BB 

10 
10 
10 

Input 

Display data signal 
RB9/GB9/BB9 is the highest intensity bit. 
RB0/GB0/BB0 is the lowest intensity bit. 

Clock 

DCLKA

DCLKB

 

2 Input 

Video signal timing: These signals 
continuously input are necessary. Data are 
read when these signals are fallen.   

Horizontal 
sync signal 

Hsync

 

1 Input 

Regulates one horizontal line of data: Begins 
control of the next screen when  Hsync  is 
fallen. 

Vertical sync 
signal 

Vsync

 

1 Input 

Screen starts up control timing signal: Begins 
control of the next screen when  Vsync  is 
fallen.                                                                 
Input the same frequency in both 
odd-numbered and even-numbered fields. 

Original 
Display signal   
(before LVDS 
transmittance) 

Blanking 
signal 

 

BLANKA

BLANKB

 

 

2 Input 

Display period timing signal. 
H indicates the display period and L indicates 
the non display period. 
Note: 
Set this timing properly like followings, as is 
used internally for signal processing. 

・

Set the blanking period so that the number of 
effective display data items in one horizontal 
period is 1366. 

・

Set the number of blanking signals in one 

vertical period to 384, which is one half the 
number of effective scan lines. 

If the  BLANK   changes when the  Vsync  
frequency is switched, the screen display may 
be disturbed or brightness may change. 
The screen display is restored to the normal 
state later when the  BLANK  length is 
constant again.