Panasonic BT-M1950Y Service Manual page 6

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PICTURE ADJUSTMENTS
Tum a separate front panel control to adjust picture contrast, picture brightness,
picture color density, and picture hue respectively:
CONTRAST (picture contrast)
r-,
Softer ~
Clearer
BRIGHT (picture brightness)
,---.
Darker ~
Brighter
CHROMA (picture color density)
r-,
Thinner
e
Denser
PHASE (picture hue) -----------
,
-
,
Purplish ~
Greenish
Relation
belween
picture adjustments and input video signals -
Each picture adjustment is effective for the following
video
signal input:
~ Composite
video,
Y/C
RGB COMPONENT
al
NTSC PAL NTSC4.43 8/W
PHASE Yes
No
Yes No
No
No
CHROMA Yes Yes Yes No No Yes
BRIGHT
Y'!S
Yes Yes Yes Yes Yes
CONTRAST
Yes Yes Yes Yes Yes Yes
s
e
To adjust the CHROMA and PHASE
con1rOls fflOl'e proclsaly, Input the
color
bar signal and operate
the
BLUE CHECK lunc:lion es follows:
After inpualng the color bar signal,
push the front panel BLUE CHECK
switch to
display
a rnonoclu<>me
blue plctum
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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.:.:
CD
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VIDEO SIGNAL CONTROLS
Push each switch to ON or OFF for video signal control.
UNDER SCAN
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.
s
• This function Is not effective for
analog RGB signal Input.
s
eThis lunc:lion Is not effective for
analog RGB signal Input
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