Flicker Adjustment; Vcom Amplitude And Agc And Wb Au- Tomatic Adjustments; Adjustment Of Horizontal Display Start Position And Pixel - Kenwood DDX512 Service Manual

1. Flicker adjustment

● Condition
Video source: Video
Video: Luster white 30%~50%
BRIGHT: MAX
MODE: FULL
● 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 X35-489: VR200 and adjust to make the amplitude
of the waveform to minimum.
Oscilloscope range: 20mV, 0.5mS
● Note
q In checking the screen after the adjustment, move 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 fl icker ad-
justment jig and oscilloscope and thus carefully set up
the power supply and GND of the jig and oscilloscope.
∗ In 07 model, GND of the measurement equipment has
been fl oated.
DDX5022/5022Y/5032/5032M/512/52RY
DNX5120/512EX/5220/5220BT
ADJUSTMENT
2. VCOM Amplitude and AGC and WB Au-
tomatic adjustments
● Adjustment conditions
Input signal: Input white 100% (NTSC) in R-CAM.
● Adjustment Method
q Press Auto Adjust on the Test Mode Main screen.
w After the automatic adjustment, "Auto Set OK" will be
shown to indicate the completion of the adjustment.
3. Adjustment of Horizontal display start
position and pixel
● Video displayed on Adjustment screen
GRAPHIC : Special screen used only for adjustment (See
DNX_NAVI : Special screen used only for adjustment of
DDX_NAVI : Input KNA-G520.
● GRAPHIC
Pixel Adjustment key (DOT_PHASE): Adjustment of horizon-
tal display position of pixel (Default: 32)
Screen Position Adjustment key (HPOSI): Adjustment of
horizontal display starting position of the entire screen (De-
fault: 0)
Display Range Adjustment key (DOT_FREQ): Adjustment of
horizontal display range of the video (Default: 64)
below)
GARMIN (See below)
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