LA76850 데이터 시트보기 (PDF) - SANYO -> Panasonic

부품명

상세내역

제조사

LA76850

Black & White Television IC

SANYO -> Panasonic 

LA76850

Deflection Block Test Conditions

Input signal

Horizontal free-running

frequency

Symbol

fH

Test point

22

Input signal

Y IN:

No signal

Horizontal output

pulse length

Hduty

Horizontal output pulse

saturation voltage

V Hsat

Vertical free-running

period 50 (PAL)

Vertical free-running

period 60 (NTSC)

VFR50

VFR60

Y IN:

22

Horizontal/

vertical sync

signal

PAL

Y IN:

22

Horizontal/

vertical sync

signal

PAL

Y IN:

18

No signal

Test method

Connect a frequency counter to the output of pin

22 (H out) and measure the horizontal free-running

frequency.

Measure the voltage for the pin 22 horizontal

output pulse’s low-level period.

Bus conditions

Measure the voltage for the pin 22 horizontal

output pulse’s low-level period.

Measure the vertical output period T at pin 18

T×15.625kHz (PAL)

T×15.734kHz (NTSC)

Vertical output

2.5V

CDMODE: 001

(PAL)

CDMODE: 002

(NTSC)

T

Horizontal output pulse

HPHCEN

(PAL)

(NTSC)

Y IN:

Measure the delay time from to the rise of the pin

22

Horizontal/

22 horizontal output pulse to the fall of the Y IN

vertical sync horizontal sync signal.

signal

28

PAL

HPHCEN

NTSC

20IRE

Horizontal position

adjustment range

HPHrange

Horizontal output

2.5V

Y IN:

With H PHASE: 0 and 31, measure the delay time H PHASE: 00000

22

Horizontal/

from the rise of the pin 22 horizontal output pulse H PHASE: 11111

vertical sync to the fall of the Y IN horizontal sync signal and

signal

28

PAL

calculate the difference from H PHCEN.

Measuring

20IRE

Horizontal output

2.5V

Continued on next page.

NoA0017-17/31

Share Link: