Motorola DCX3400 User Manual page 53

8 TROUBLESHOOTING
Problem
There are black
bars to the right
and left of the
picture
There are black
bars above and
below the picture
There are black
bars on all four
sides of the picture
Colors do not
appear correctly
The DCX set-top is
making a humming
noise.
Possible Solution
Wide screen TVs display 4:3 programs in this format unless set to
Stretch. Turn on the 4:3 OVERRIDE feature in the User Settings menu.
This enables most wide screen TVs to stretch the video to fill the screen
(see your TV manual for information about stretching 4:3 video).
•
If the DCX set-top is connected to a wide screen TV, verify that
the TV TYPE is set to 16:9 in the User Settings menu.
Many HD programs are broadcast in pillar-box format with black bars to
the left and right of the picture. These programs are broadcast in 16:9 HD
formats even though the video is not 16:9.
All 4:3 HDTVs display HD programs in letterbox format (black bars above
and below the picture) because of the shape of the display screen.
•
Turn on the 4:3 OVERRIDE feature in the User Settings menu.
This enables most standard screen TVs to display a full screen
picture when the DCX set-top is tuned to a 4:3 program.
•
Set the TV TYPE to 4:3 Pan-Scan. This enables the DCX set-top
to remove the black bars above and below the picture when
possible.
Some SD programs are broadcast in the letterbox format with black bars
above and below the picture. Some widescreen TVs offer a zoom feature
that may be able to remove the black bars (see your TV manual for
information about zooming 4:3 video).
This may occur on a 4:3 TV if the 4:3 OVERRIDE setting is OFF. To set
4:3 SD programming to fill the screen, depending on the capabilities of
the TV, set 4:3 OVERRIDE to 480i or 480p.
This may occur on a 16:9 TV if the active video for an SD broadcast is in
letterbox format. To confirm, wait for a commercial or look for a graphic,
such as a network logo. If the commercial fills the screen from top to
bottom, or the graphic appears below the active video, the program is
being letterboxed by the broadcaster. You can minimize this by activating
the zoom feature on the TV.
A broadcaster may include black bars on either side of a wide screen
broadcast. This is called a "hybrid" aspect ratio and results in a black
border surrounding the video on a 4:3 TV. Because this is part of the
broadcast, the DCX set-top cannot correct the video. You may be able to
minimize the border using the zoom feature on the TV.
Be sure to match up each signal to the same YPbPr connection on the
TV, otherwise the colors will not appear correctly on your TV.
The DCX set-top includes an integrated hard drive and a fan for cooling.
During normal operation, the DCX set-top emits a low humming noise,
similar to a personal computer. The noise varies in volume occasionally
when the speed of the internal fan adjusts to changes in the temperature
around the DCX set-top. Please note the hard drive will stay on even
when the DCX set-top is turned off (standby).
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