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TA1276AFG Datasheet, PDF (54/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV
Note
Parameter
T15 ABL Point
T16 ABL Gain
T17 RGB Output Mode
TA1276AFG
SW33
A
↑
↑
SW34
A
↑
↑
SW35
A
↑
↑
Test Conditions (unless otherwise stated, VCC1 = 5 V, VCC2/VCC3/DEF VCC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW37 SW38 SW39 SW51 SW52 SW53
Test Conditions
1) Measure the DC voltage of pin 8. (VABL1)
2) Set the subaddress (16) data to (1C).
3) Applying external voltage to pin 8, lower the pin voltage from 6.5 V.
Measure the voltage of pin 8 when the voltage of pin 11 starts to change.
(VABL2)
A
A
A
B
B
C 4) Change the data of subaddress (16) to (3C), (5C), (7C), (9C), (BC), (DC),
and (FC), and repeat step 3) for each of these data. (VABL3, VABL4,
VABL5, VABL6, VABL7, VABL8, VABL9)
5) ABLP1 = VABL2 − VABL1, ABLP5 = VABL6 − VABL1
ABLP2 = VABL3 − VABL1, ABLP6 = VABL7 − VABL1
ABLP3 = VABL4 − VABL1, ABLP7 = VABL8 − VABL1
ABLP4 = VABL5 − VABL1, ABLP8 = VABL9 − VABL1
1) Apply 6.5 V from an external power supply to pin 8.
2) Set the subaddress (16) data to (00). Set the brightness to the maximum.
3) Measure the voltage of pin 11. (VABL10)
4) Apply 4.5 V from an external power supply to pin 8.
↑
↑
↑
↑
↑
↑ 5) Change the data of subaddress (16) to (00), (04), (08), (0C), (10), (14),
(18), and (1C), and repeat step 3) for each of these data.(VABL11,
VABL12, VABL13, VABL14, VABL15, VABL16, VABL17, VABL18)
6) ABLG1 = VABL11 − VABL10, ABLG5 = VABL15 − VABL10
ABLG2 = VABL12 − VABL10, ABLG6 = VABL16 − VABL10
ABLG3 = VABL13 − VABL10, ABLG7 = VABL17 − VABL10
ABLG4 = VABL14 − VABL10, ABLG8 = VABL18 − VABL10
1) Adjust the brightness so that the picture period voltage of pin 11 is set to
2.5 V.
2) Set the subaddress (16) data to (01).
3) Measure the picture period voltages of pins 11, 13, and 15.
↑
↑
↑
↑
↑
↑
(V43R, V42R, V41R)
4) Change the subaddress (16) data to (02) and repeat step 3).
(V43G, V42G, V41G)
5) Change the subaddress (16) data to (03) and repeat step 3).
(V43B, V42B, V41B)
54
2002-04-01