LA76850 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA76850

Black & White Television IC

SANYO -> Panasonic 

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Input signal

Symbol

Vertical S-shaped

correction @16

VScor16

Vertical S-shaped

correction @0

VScor0

Vertical S-shaped

correction @31

VScor31

LA76850

Test point

18

Input signal

Y IN:

Horizontal/

vertical sync

signal

PAL

Test method

Monitor the pin 18 vertical ramp output and

measure the voltage at line 36, line 60, line 155,

line 179, line 274 and 298. Assign the

respective measured values to Va, Vb, Vc, Vd, Ve

and Vf. Calculate as follows:

VScor16 = 0.5((Vb-Va)+(Vf-Ve))/ (Vd-Vc)

Bus conditions

VS: 10000

Vertical ramp output

Line 298

Line 179

Line 60

Line 274

Line 36

Line 155

Y IN:

Monitor the pin 18 vertical ramp output and

Horizontal/

measure the voltage at the line 36, line 60, line

vertical sync 155, line 179, line 274 and line 298

18

signal

with VSC = 00000.

PAL

Assign the respective measured values to Va, Vb,

Vc, Vd, Ve and Vf. Calculate as follows:

VScor0 = 0.5((Vb-Va)+(Vf-Ve))/ (Vd-Vc)

Vertical ramp output

Line 298

Line 179

Line 60

Line 274

Line 36

Line 155

Y IN:

Monitor the pin 18 vertical ramp output and

VSC: 11111

18

Horizontal/

measure the voltage at line 36, line 60, line 155,

vertical sync line 179, line 274 and 298. Assign the

signal

respective measured values to Va, Vb, Vc, Vd, Ve

PAL

and Vf. Calculate as follows:

VScor16 = 0.5((Vb-Va)+(Vf-Ve))/ (Vd-Vc)

Vertical ramp output

Line 298

Line 179

Line 60

Line 36

Line 274

Line 155

NoA0017-24/31

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