LA76931 Ver la hoja de datos (PDF) - Unspecified

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LA76931

64Pin LA76931 for Color Television Receiver / SERVICE MANUAL

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Technical Note of LA76931

V TRANCE

1 Enable data transmission between vertical retrace period

0 = random transmission

1 = transmission between vertical retrace period

V Reset Timing

1 Select Vertical Reset Timing

Select Vertical output start timing.

0 = Normal

1 =0.25H shifted

Audio Mute

1 Disable audio outputs

Mute the audio output.

0 = Mute OFF

1 = Mute ON

Video Mute

1 Disable video outputs

Mute the RGB output.(The blanking output level of RGB is about 1.6Vdc)

0 = Mute OFF

1 = Mute ON

H PHASE

Adjust the center of H.

5 Align sync to flyback phase

Sync Kill

1 Force free-run mode

Whatever there is a synchronization signal or not, the frequency of horizontal oscillator is in free-run situation.

Set this function in active if “no signal” is detected by CPU, then the rolling of OSD can almost be reduced.

0 = TV operating mode

1 = Sync Kill mode

Vertical Size

Adjust the size of V.

7 Align vertical amplitude

V-sync Separation Up

1 Select vertical sync. separation sensitivity

Improved the sensitivity of the vertical separation circuit.

0 = Normal mode

1 = Sensitivity up mode

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