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LA76810A 
NoA0252-16/40 
Continued from preceding page. 
Input signal 
Symbol 
Test point 
Input signal
Test method 
Bus bit/input signal 
Bias (cutoff) control 
(min) 
Vbias0 
L-50 
Measure the 0IRE DC levels (Vbias0* V) of the 
respective output signals of R output (19), G 
output (20), and B output (21). 
*: R, G, and B 
Sub-Brightness: 
0000000 
(max) 
Vbias255 
Measure the 0IRE DC levels (Vbias255* V) of the 
respective output signals of R output (19), G 
output (20), and B output (21). 
*: R, G, and B 
Sub-Brightness: 
1111111 
Red/Green/Blue 
Bias: 11111111 
Measure the 0IRE DC levels (BAS80* V) of the 
respective output signals of R output (19), G 
output (20), and B output (21). 
*: R, G, and B 
Red/Green/Blue 
Bias:01010000 
Measure the 0IRE DC levels (BAS48* V) of the 
respective output signals of R output (19), G 
output (20), and B output (21). 
Red/Green/Blue 
Bias: 00110000 
Bias (cutoff) control 
resolution 
Vbiassns 
Calculate Vbiassns* = (BAS80*-BAS48*)/32 
Measure the 0IRE DC levels (SBTPM* V) of the 
respective output signals of R output (19), G 
output (20), and B output (21). 
Sub-Brightness: 
0101010 
Contrast: 0111111 
Sub-bias control  
resolution 
Vsbiassns 
L-50 
Calculate Vsbiassns* = (BRTPC*-SBTPM*) 
Drive adjustment  
maximum output 
RBout127 
Gout15 
L-100 
Measure the 100IRE amplitudes  
(DRVH* Vp-p) of the respective output  
signals of R output (19) and B output (21). 
*: R and B 
Measure the 100IRE amplitude of the output 
signal of G output (20) and assign the measured 
value to DRVH* Vp-p. 
*: G 
Brightness:  
0000000 
Output attenuation 
RBout0 
Measure the 100IRE amplitudes (DRVL* Vp-p) of 
the respective output signals of R output (19), G 
*: R and B 
Measure the 100IRE amplitude of the output 
signal of G output (20) and assign the measured 
value to DRVL* Vp-p. 
*: G 
Brightness:  
0000000 
Red/Blue Drive: 
0000000 
Gout0 
RBout0* = 20Log (DRVH*/DRVL*) 
Gout0* = 20Log (DRVH*/DRVL*) 
Measure the 100IRE amplitude of the respective 
output signals of R output (28), G output (29), 
and B output (30) with Gamma Def being ON and 
OFF. Assign the measured values to *A, *B and 
Vp-p, respectively. 
* : R, G, B 
*
γ
 = 100*(*A/*B) 
Contrast: 0111111 
Brightness:  
01111111 
Gamma Def: Off,On
B Gamma  
sel: 11,00 
Gamma correction 
R
γ
G
γ
B
γ
L-100 
20 
19 
21 
20 
19 
21 
20 
19 
21