DVD 25 (serv.man7) - Harman Kardon Audio Service Manual (repair manual). Page 5

 TEST SCREEN

When you press the TEST button on the front
panel or on the remote you can activate a still
image to test all settings and the video perform-
ance of your TV. With the vertical color bars you
can test the following:
■ proper color intensity setting on your TV,
■ the proper color of each bar, showing if the

proper video standard is turned on: the colors
should be (left to right): black, white, yellow,
cyan (turquoise), green, magenta (purple), red,
blue, black.

■ proper color transition, seen as sharp separa-

tion of the bars, S-Video will be better than
Video, RGB best of all.

■ the performance of the color filter in your TV

(with ”Video” signals), bar edges should show
no vertical crawling dots. Here S-Video and
RGB formats usually give no problems.

With the grey scale and the black/white fields
below the color bars the brightness and contrast
of your screen can be adjusted optimally, see
chapter ”TV Picture Adjustment” below.

These adjustments may be done now, but you
can also make them after setup has been final-
ized. They can also be made at any time when
the player is in Stop or Resume mode, simply by
pressing TEST on the remote control or on the
front panel.

Brightness adjustment:
1. Turn down the color control on your TV until

the color bars are visible in black and white.

2. Adjust the contrast to the lowest level where

you still can see all bars within the grey scale
in the test picture separately and clearly.

3. Adjust the Brightness so that the bars in the

grey scale are all visible. The bar furtherst to
the left has to be as black as possible rather
than grey but the next aside must clearly be
differable. All the bars in the grey scale have to
be gradually and evenly changing from black
to whiter, going from left to right.

Contrast adjustment:
1. Adjust the contrast on your TV until you see a

bright white bar in the right low corner of the
screen and a deep dark black bar at the left.
The optimal contrast setting will depend from
your preference and the surrounding light in
the TV room.

2. If the brightness of the white bar will no more

increase while turning up the contrast or when
the borders of the white ”harman/kardon” text
letters on top will bloom (overlight) into the
black areas, what drasticly will decrease the
sharpness of the script, then the Contrast has
been turned up too much. Reduce the contrast
until these effects will disappear and the video
still looks realistic.

3. If you are watching TV with a usual surround-

ing daylight, adjust the Contrast so that a nor-
mal video picture has about the same looking
as the surroundings in your room. By that way
the eye is relazed when watching the TV pic-
ture. This contrast setting may be reduced
when the surrounding light is dimmed, usually
improving the sharpness of a video a lot there-
by.

4. The grey scale in the middle line needs to have

the same clear difference between each bar as
before the contrast adjustment. If not, go back
to the brightness adjustment and repeat step 3
and then the contrast adjustments, making
only minor adjustments each time for optimisa-
tion.

Color adjustment.
1. When the Brightness and the Contrast are set

optimally, turn up the color control to the level
of your perference. Adjust to the level where
the colors look strong but still natural, not
overdone. If the color level is too high, depend-
ing from the TV used some of the bars will
seem wider or the color intensity will not
increase while the control is turned up. Then
the color control must be reduced again. At the
end you should test the color intensity also
with a video, e.g. pictures of natural faces,
flowers, fruit and vegetables and other well
known natural articles of our life most usefull
for an optimal setting of the color intensity.

2. If your TV has a Tint option (with most

European TVs this is available or effective only
with NTSC signals, not with PAL), use the large
white bar below the Greyscale to tweak the
warmth of the picture. Every viewer has a dif-
ference in preference as how the glow of the
picture should be. Some prefer a little colder
picture, some a warmer glow. The Tint function
on your TV and the white bar can be used to
control this. Adjust the Tint to the level where
you feel the white color has the tone you
prefer.