Electrical Adjustment (Video Output Adjustment) - Panasonic DVD-LV75 Service Manual

DVD-LV75 / DVD-PV55
11.6. Electrical adjustment (video
output adjustment)
11.6.1. Video output (brightness signal)
adjustment
Measurement Adjustment
point point
Video output VR3021
terminal
Measurement equipment
Oscilloscope
Purpose: to preserve the reciprocity of the video output
signal
1. Connect a monitor to the video output terminal and set
it to 75 ohm.
2. Select a color bar (TITLE 46 or TITLE 12) from the DVD
test disc.
3. Adjust VR3021 until the brightness signal (including
sync chip) reaches the following value.
Test point/Volume position
Mode Test disc
Color bar DVDT-S15 or
playback DVDT-S01
Adjustment value
1000Vp-p ± 20mV
11.6.2. Video output (color signal)
adjustment
Measurement Adjustment
point point
Video output VR3022
terminal
Measurement equipment
Oscilloscope
Purpose: to preserve the reciprocity of the video output
signal
1. Connect a monitor to the video output terminal and set
it to 75 ohm.
2. Select a color bar (TITLE 46 or TITLE 12) from the DVD
test disc.
3. Adjust VR3022 until the color signal (cyan portion)
reaches the following value.
26
Mode Test disc
Color bar DVDT-S15 or
playback DVDT-S01
Adjustment value
671Vp-p ± 13mV