Motorola DCX3400 Series User Manual page 39

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.
8 • Troubleshooting
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.
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 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 may stay on even when the DCX set-
top is turned off (standby).
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