Yamaha DVD-S1200 Service Manual page 27

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5. ELECTRICAL ADJUSTMENT
Do this confirmation after replacing a P.C.B.
5.1. Video Output (Luminace Signal) Adjustment
Do this confirmation after replacing a P.C.B.
Measurement point
S-video output terminal (Y OUT)
Measuring equipment, tools
Screwdriver, Oscilloscope
200mV/div10µsec/div
Purpose: To maintain video signal output compatibility.
1. Connect the oscilloscope to the S-video output and terminate at 75 ohms.
2. Adjust VR3225 so that the Y level is 1000 mVp-p ± 20 mV.
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5.2. Video Output (Chrominance Signal) Adjustment
Measurement point
S-Video output terminal (C OUT)
Measuring equipment, tools
Screwdriver,Oscilloscope
200mV/div10µsec/div
Purpose: To maintain video signal output compatibility.
1. Connect the oscilloscope to the S-video output and terminate at 75 ohms.
2. Adjust VR3221 so that the Magenta level is 779 mVp-p ± 40 mV.
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Adjustment value
1000mVp-p±20mV
PLAY
Adjustment value
779 mVp-p±40 mV
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Mode Disc
DTDT-S15 (Title 10), DVDT-S01 (Title 48)
Color bar 100%
Adjustment point
VR3225
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Mode Disc
DVDT-S15 (Title 10), DVDT-S01 (Title 48)
Color bar 100%
Adjustment point
VR3221
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DVD-S1200
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