Electrical Confirmation; Video Output (Luminance Signal) Confirmation; Video Output (Chrominance Signal) Confirmation - Yamaha DV-S5270 Service Manual

ELECTRICAL CONFIRMATION

1. Video Output (Luminance Signal) Confirmation

Do this confirmation after replacing a C.B.A.
Measurement point
Video output terminal
Measuring equipment, tools
Screwdriver, Oscilloscope
200mV/div, 10 usec/div
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.

2. Video Output (Chrominance Signal) Confirmation

Do this confirmation after replacing a C.B.A.
Measurement point
Video output terminal
Measuring equipment, tools
Screwdriver, Oscilloscope
200mV/div, 10 usec/div
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.
Mode
Color bar 75%
PLAY (Title 46): DVDT-S15
PLAY (Title 10): DVDT-S01
30mV
Mode
Color bar 75%
PLAY (Title 46): DVDT-S15
PLAY (Title 10): DVDT-S01
621mV
2 - 17
Disc
DVDT-S15 (AAX07320)
or
DVDT-S01 (TX946080)
Confirmation value
1000mVp-p±30mV
Disc
DVDT-S15 (AAX07320)
or
DVDT-S01 (TX946080)
Confirmation value
621mVp-p±13mV