Flicker Adjustment; Automatic Adjustment Of Rgb Amplitude And Wb Vcom Amplitude - Kenwood DDX7019 Service Manual

DDX7019/7029/7029Y/7039/8019/8029/8029Y/8039
DNX7100/710EX/7200

1. Flicker adjustment

● Condition (same conditon as it is used in the
previous models)
Video Source: VIDEO
Video: Luster white 30%~50%
BRIGHT: MAX
MODE: ZOOM
● Adjustment procedure
q Display luster white 30%~50%.
w Place a fl icker adjustment jig to the monitor and observe
the waveform with an oscilloscope.
e Turn VR200 and adjust it to make the amplitude of the
waveform to minimum.
Oscilloscope range: 20mV, 0.5mS
● Note
q In checking the screen after the adjustment, shake the
monitor up and down in order to confi rm that the screen
does not fl icker. (This check is also carried out on the 07
model.)
w Noise due to AC200V can be observed in the flicker
adjustment jig and oscilloscope, and thus carefully set up
the power supply and GND of the jig and oscilloscope.
* In the 07 model, GND of the measurement equipment
has been fl oated.
8
ADJUSTMENT
2. Automatic adjustment of RGB amplitude
and WB VCOM amplitude
● Adjustment requirement
Input signal: Input white 100% (NTSC) in VIDEO1
● Adjustment method
q Press Auto Adjust on the Test Mode Main screen.
w Press RGB on the Auto Adjust screen.
e After the automatic adjustment, "Auto Set OK" will be
shown to indicate the completion of the adjustment