LA76814 查看數據表（PDF） - SANYO -> Panasonic

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LA76814

For NTSC Color Television Sets VIF/SIF/Y/C/Deflection Implemented in a Single Chip

SANYO -> Panasonic 

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Parameter

Symbol

Demodulation

angle G-Y/B-Y

ANGGB

Killer operating

point

KILL

Chroma VCO

free-running

frequency

fsc output amplitude

CVCOF

C_FSC

LA76814

Test point

20

21

35

Input signal

C-1

C-3

CIN:

No signal

Test method

Measure each output level of the GOUT and

calculate the angle of the G-Y axis.

ANGBG = (G-Y angle)-(B-Y angle)

Reduce the input signal until the output level

becomes 50mVp-p or less. Measure the input level

at that moment.

Measure oscillation frequency f.

CVCOF = f-3579545 (Hz)

C-1

21

Measure 3.58MHz CW output amplitude at pin 37.

Bus conditions

Chroma BPF Block Test Conditions

Parameter

Band-pass

amplitude

character-

3.08MHz

istic

3.88/3.28

MHz

Symbol

CBP308

CBP03

Test point

21

21

4.08/3.08

CBP05

MHz

21

Input signal

C-3

C-3

C-3

Test method

Measure V5 output amplitude. Set the chroma

frequency (CW) to 3.08MHz and measure V6

output amplitude.

CBE308 = 20Log (V6/V5)

Measure V7 output amplitude when the chroma

frequency (CW) is 3.28MHz and V8 output

amplitude when it (CW) is 3.88 MHz.

CBE = 20Log (V8/V7)

Set the chroma frequency (CW) to 4.08MHz and

measure V9 output amplitude.

CBE05 = 20Log (V9/V6)

Bus conditions

FILTER.SYS: 1

C.BYPASS: 0

FILTER.SYS: 1

C.BYPASS :0

FILTER.SYS: 1

C.BYPASS: 0

No.A0253-14/35

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