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Troubleshooting, cont’d
DVS 150 Troubleshooting 5-2
This section gives recommendations on what to do if you have problems operating
the DVS 150, and it provides examples and descriptions for some image problems
you might encounter.
Following are some tips to help you in troubleshooting.
1. Some symptoms may resemble others, so you may want to look through all of
the examples before attacking the problem.
2.
Be prepared to backtrack in case the action taken doesn’t solve the problem.
3. It may help to keep notes and sketches in case the troubleshooting process
gets lengthy. This will also give you something to discuss if you call for
technical support.
4. Try simplifying the system by eliminating components that may have
introduced the problem or made it more complicated.
5. For sync-related problems: Portable digital projectors are designed to operate
close to the video source. Sync problems may result from using long cables or
from improper termination. A sync adapter, such as Extron’s ASTA (active
sync termination adapter), may help solve these problems.
6. For LCD and DLP projectors and plasma displays: In addition to the sync-
related information above, check the user’s manual that came with the
projector for troubleshooting tips, as well as for settings and adjustments.
Each manufacturer may have its own terms, so look for terms like “auto
setup”, “auto sync”, “pixel phase”, and “tracking”.
Operating Problems
The table below shows some common operating problems and their solutions.
Problem Cause Solution
No image appears. The input signal is Attach an input device that is
incompatible. compatible with NTSC 3.58,
NTSC 4.43, PAL, or SECAM.
Freeze mode was Deactivate freeze mode (page 3-4).
entered when the
image was black.
The scaled output
Change the scaled output to a
rate is too high for compatible resolution (page 3-3).
the display.
The image is frozen. Freeze mode is on. Deactivate freeze mode (page 3-4).
If that does not work, unplug the
power cord from the scaler, then
plug it back in.
The image is flashing. The scaled output Change the scaled output to a
rate is too high for compatible resolution (page 3-3).
the display.
Inputs cannot be Autoswitch is Turn off autoswitch (page 2-6).
switched. turned on.
Troubleshooting