Extron electronic Troubleshooting, Operating Problems, QSD 204 Installation and Operation

Troubleshooting

This section gives recommendations on what to do if you have problems operating the QSD 204, and it provides examples and descriptions for some image problems you might encounter.

The 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 attempting to solve 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
	entered when the
	image was black.
The image is frozen.	Freeze mode is on.	Deactivate freeze mode.
		If that does not work, unplug the
		power cord from the decoder,
		then plug it back in.

The image is green.	The output sync
	is configured for
	sync on green.

Turn off sync on green.

The image is too soft.	The detail level	Change the detail level.
	needs to be
	changed.

QSD 204 • Installation and Operation 2-17