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Troubleshooting B
High-Definition All-Digital Dual Tuner DVR Set-top DCX3501–M User Guide
48
365-095-16095-x.2
Problem
Possible Solution
picture
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).
There are black bars on
all four sides of the
picture
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.
Colors do not appear
correctly
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 is
making a humming
noise.
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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  • how do I display the clock on Motorola cable box DCX 3501-M Submitted on 22-5-2023 at 14:18

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