Runco Q-750I Maintenance and Troubleshooting, Troubleshooting Tips, 1.Troubleshooting Chart

5. Maintenance and Troubleshooting

Table 5-1provides some general guidelines for troubleshooting problems you may encounter with the Q-750i. If the suggested solutions fail to resolve the problem or if you encounter an issue not described here, please contact Runco Technical Support.

Table 5-1. Troubleshooting Chart

Symptom		Possible Cause(s)		Solution
The projector does not turn	•	The Q-750i is not plugged	• Ensure that the Q-750i is
on.		in or the AC outlet is not		plugged in and that the AC
		active.		outlet is active.
The remote control does not	•	The batteries have run out.	•	Replace the batteries.
work correctly.
The projector is on and OSD	•	Incorrect source selection.	• Select the correct source.
menus appear, but there is no	•	Source component is not	• Turn on the source.
video image on-screen.		turned on.
	•	Source component is	•	Check cable connection
		connected incorrectly or		from source component to
		not at all.		projector.

5.1

Troubleshooting Tips

A projected image from a DVD is split or otherwise scrambled.

Image is blurred.

Image is too bright and/or lacks definition in the bright areas of the image.

• DVD player is connected	• Turn off progressive scan
to the Component input	on the DVD player.
and set to progressive
scan mode.
• The lens is not correctly	• Adjust the focus.
focused.
• Contrast is set too high.	• Lower the contrast setting.

Image geometry is incorrect.	• Incorrect aspect ratio	• Select the aspect ratio that
	selection.	best matches the source
		image and screen size
		(refer to Table 4-2).

Image appears “washed out” and/or dark areas appear too bright.

Colors in the image are swapped; for example, reds appear blue or vice versa.

•Brightness is set too high.

•The Red/Pr, Green/Y or Blue/Pb outputs from the source are connected to the wrong inputs on the Q-750i.

•Lower the brightness setting.

•Ensure that the source outputs are connected to the correct Q-750i input.

Note: You can obtain more detailed information about the cause of the error condition using RS-232 commands. Refer to RS-232 Error Codes on page 83 for more information.

Q-750i Series Installation/Operation Manual 71