Yamaha DVD-C996 Service Manual page 26

DVD-C996/DV-C6280
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ELECTRICAL CONFIRMATION
1. Video Output (Luminance Signal) Confirmation
Do this confirmation after replacing a P.C.B
Measuring equipment, tools
Screwdriver, Oscilloscope
Purpose: To maintain video signal output compatibility.
1. Connect the oscilloscope to the video output terminal and terminate at 75 ohms.
2. Confirm that the luminance signal (Y+S) level is 1000 mVp-p ± 30 mV.
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L 13942296513
2. Video Output (Chrominance Signal) Confirmation
Do this confirmation after replacing a P.C.B.
Measuring equipment, tools
Screwdriver, Oscilloscope
Purpose: To maintain video signal output compatibility.
1. Connect the oscilloscope to the video output terminal and terminate at 75 ohms.
2. Confirm that the chrominance signal (C) level is 621 mVp-p ±13 mV.
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Measurement point
Video output terminal
200mV/div, 10 usec/div
30mV
Measurement point
Video output terminal
200mV/div, 10 usec/div
621mV
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8
Mode
Color bar 75%
PLAY (Title 46): DVDT-S15
PLAY (Title 10): DVDT-S01
Confirmation value
1000mVp-p±30mV
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3 6 7 1 3
Mode
Color bar 75%
PLAY (Title 46): DVDT-S15
PLAY (Title 10): DVDT-S01
Confirmation value
621mVp-p±13mV
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2 9 9 4 2 8
Disc
DVDT-S15 (AAX07320)
or
DVDT-S01 (TX946080)
1 5 0 5 8 2 9 9 4
Disc
DVDT-S15 (AAX07320)
or
DVDT-S01 (TX946080)
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9 9
2 8 9 9