Sharp LC-20AV7U Service Manual - Page 49
Waveforms
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WAVEFORMS WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: NTSC Color Bar Signal (with 1kHz Audio Signal) WF1 Pin 71 of IC1202 WF5 Pin 56 of IC1202 CVBS 0.2V 20µs WF2 Pin 76 of IC1202 VIDEO-Pb 0.2V 20µs WF6 Pin 66 of IC1202 S-VIDEO-Y 0.2V 20µs WF3 Pin 57 of IC1202 VIDEO-Pr 0.2V 20µs WF7 Pin 14 of IC801 S-VIDEO-C 0.2V 20µs WF4 Pin 75 of IC1202 AUDIO 0.1V 0.5ms VIDEO-Y 0.2V 20µs 10-1 LC5WF
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WAVEFORMS
LC5WF
10-1
Input:
NTSC Color Bar Signal (with 1kHz Audio Signal)
WF1 ~ WF7 =
Waveforms to be observed at
Waveform check points.
(Shown in Schematic Diagram.)
CVBS
0.2V
20
µ
s
WF1
Pin 71 of IC1202
S-VIDEO-Y
0.2V
WF2
Pin 76 of IC1202
20
µ
s
S-VIDEO-C
0.2V
WF3
Pin 57 of IC1202
20
µ
s
AUDIO
0.1V
0.5ms
WF7
Pin 14 of IC801
VIDEO-Pr
0.2V
20
µ
s
Pin 66 of IC1202
WF6
VIDEO-Pb
0.2V
20
µ
s
Pin 56 of IC1202
WF5
VIDEO-Y
0.2V
20
µ
s
Pin 75 of IC1202
WF4