Panasonic BT-M2090Y Service Manual page 6

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PICTURE ADJUSTMENTS
Turn a separate front panel control to adjust picture contrast, picture brightness,
picture colour density, and picture hue respectively:
CONTRAST (picture contrast)--------
Softer
r~,
Clearer
BRIGHT (picture brightness) ---------
Darker
r
ij'
Brighter
CHROMA (picture colour density) -------
Thinner
rij,
Denser
PHASE (picture hue)
Purplish
r
ij '
Greenish
Relation between picture adjustments and input video signals -
Each picture adjustment is effective for the following video signal input:
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Composite video, Y/C
RGB COMPONENT
Control
NTSC PAL NTSC 4.43 B/W
PHASE Yes
No Yes No No No
CHROMA Yes Yes Yes No No Yes
BRIGHT Yes Yes Yes Yes Yes Yes
CONTRAST Yes Yes Yes Yes Yes Yes
8
e To adjust the CHROMA and PHASE
controls more precisely, Input the
oolour bar signal and operate the
BLUE CHECK lunclion as follows:
After Inputting the oolour bar signal,
push the front panel BLUE CHECK
switch
to
display a monochrome
blue picture without red/green signal
components. Tum the CHROMA
and PHASE controls so that all
(four, in the example below) blue
bars have the same density and
brightness.
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VIDEO SIGNAL CONTROLS
Push each switch to ON or OFF for video signal control.
UNDERSCAN-------------
Push the UNDER SCAN switch to reduce the dimensions of display
area so the whole picture is displayed on screen. Use to check the picture
frame.
PULSE CROSS
Push the PULSE CROSS switch to simultaneously display two blank
areas crossed horizontally and vertically on screen ("Pulse Cross"
display) by delaying the phase of the Input signal. Use to check the
vertical retrace line period, equalizing pulse period, vertical sync period,
horizontal sync pulse, or burst signal.
COLOR OFF
Push the COLOR OFF switch to display a black-and-white picture by
inputting a luminance signal only. Use to check the noise contained in a
luminance signal or white balance.
BLUE
CHECK
Push the BLUE CHECK switch to display a monochrome blue picture
by eliminating red and green signal components. Use to check or adjust
the CHROMA and/or PHASE controls.
8
• This function is not effective for
analogue RGB signal Input.
8
• This function is not effective for
analogue RGB signal Input.
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