7-2E
7-3. S-Video Output S-C Level Check
<Purpose>
This check confirms that the S-video output S-C conforms to the
NTSC standard. If it is adjusted incorrectly, color will be too dark
or too thin.
Mode
Video level adjustment in test mode.
Signal
Color bars
Test point
S VIDEO OUT (S-C) connector
(terminated in 75
Ω
)
Instrument
Oscilloscope
Specification
286
±
30mVp-p
Adjustment method :
1)
Insert the reference disk and play back the 100% color bars.
2)
Confirm that the burst signal level of S-C is 286
±
30 mVp-p.
Fig. 7-3.
7-4. Component Video Output Y Check
<Purpose>
This check confirms that the Y signal output is correct. If this signal
level is not correct, brightness of the video signal will be too bright
or too dark when the COMPONENT connector output signal is
connected to the projector having COMPONENT input.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT (Y)
connector,D1/D2 VIDEO OUT
connector (terminated in 75
Ω
)
Instrument
Oscilloscope
Specification
1.0
±
0.05Vp-p
Adjustment method:
1)
Insert the reference disk and play back the 100% color bars.
2)
Check that the Y level is 1.0
±
0.05 Vp-p.
286
±
30mVp-p
7-5. Component Video Output B-Y Check
<Purpose>
This check confirms that the B-Y signal of the component video
output is correct. If this signal level is not correct, color of the video
signal will have different color when the COMPONENT connector
output signal is connected to the projector having COMPONENT
input.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT
(PB/CB)
terminal (terminated in 75
Ω
)
Instrument
Oscilloscope
Specification
700
±
50mVp-p
Adjustment method:
1)
Insert the reference disk and play back the 100% color bars.
2)
Confirm that the B-Y level is 700
±
50 mVp-p.
1.0
±
0.05Vp-p
Fig. 7-5.
7-6. Component Video Output R-Y Check
<Purpose>
This check confirms that the R-Y signal of the component video
output is correct. If this signal level is not correct, color of the video
signal will have different color when the COMPONENT connector
output signal is connected to the projector having COMPONENT
input.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT
(PR/CR)
connector (terminated in 75
Ω
)
Instrument
Oscilloscope
Specification
700
±
50mVp-p
Adjustment method:
1)
Insert the reference disk and play back the 100% color bars.
2)
Confirm that the R-Y level is 700
±
50 mVp-p.
Fig. 7-6.
700
±
50 mVp-p
700
±
50 mVp-p
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