LA76810A Datasheet, PDF (15/40 Pages) Sanyo Semicon Device – For PAL/NTSC Color Television Sets VIF/SIF/Y/Deflection 1chip IC

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Input signal
Symbol
Blue RGB output
level
BOSDC
Analog OSD R output
level
Gain match
linearity
Analog OSD G output
level
RRGB
LRRGB
Gain match
linearity
Analog OSD B output
level
GRGB
LGRGB
Gain match
linearity
BRGB
LBRGB
LA76810A
Test point
21
19
20
21
Input signal
L-50
L-0
O-2
L-0
O-1
L-0
O-1
L-0
O-1
Test method
Measure the output signal’s 50IRE amplitude
(CNTCB Vp-p).
Measure the OSD output amplitude
(OSDHB Vp-p).
Calculate BOSDC = 50 × (OSDHB/CNTCB)
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLR Vp-p and
RGBHR Vp-p, respectively.
Calculate RRGB = RGBLR/CNTCR.
Calculate LRRGB = 100 × (RGBLR/RGBHR).
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLG Vp-p and
RGBHG Vp-p, respectively.
Calculate GRGB = RGBLG/CNTCG.
Calculate LGRGB = 100 × (RGBLG/RGBHG).
Measure the amplitudes at point A (0.35V portion
of the input signal 0-1) and point B (0.7V portion
of the input signal 0-1) of the output signal.
Assign the measured values to RGBLB Vp-p and
RGBHB Vp-p, respectively.
Calculate BRGB = RGBLB/CNTCB.
Calculate LBRGB = 100 × (RGBLB/RGBHB).
Bus bit/input signal
Pin 17: 3.5V
Pin 16A: O-2
applied
Pin 17 : 3.5V
Pin 14A : O-1
applied
Pin 17: 3.5V
Pin 15A: O-1
applied
Pin 17: 3.5V
Pin 16A: O-1
applied
[RGB output block] (Cutoff, drive block) Bus control bit conditions: Contrast=127
Input signal
Brightness control
(normal)
Symbol
BRT63
Test point
19
20
Input signal
L-0
Test method
Measure the 0IRE DC levels of the respective
output signals of R output (19), G output (20), and
B output (21). Assign the measured values to
BRTPCR, BRTPCG, and BRTPCB V, respec ively.
Calculate BRT63 = (BRTPCR+BRTPCG+
BRTPCB)/3.
Bus bit/input signal
Brightness:
01111111
21
(max)
BRT127
21
(min)
BRT0
Measure the 0IRE DC level of the output signal of
B output (21) and assign the measured value to
BRTPHB.
Calculate BRT127 = 50 × (BRTPHB-BRTPCB)/
CNTHB.
Measure the 0IRE DC level of the output signal of
B output (21) and assign the measured value to
BRTPLB.
Calculate BRT0 = 50 × (BRTPLB-BRTPCB)/
CNTHB.
Brightness:
1111111
Brightness:
0000000
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