Runco Q-750D Maintenance and Troubleshooting, Troubleshooting Tips, Troubleshooting Chart

5. Maintenance and Troubleshooting

Table 5-1provides some general guidelines for troubleshooting problems you may encounter with the Q-750d. If you encounter an issue not described here, please contact Runco Technical Support.

Table 5-1. Troubleshooting Chart

Symptom	Possible Cause(s)	Solution
Neither the DHD Controller	• The DHD Controller is not	• Ensure that the DHD
nor the projector turns on.	plugged in or the AC outlet	Controller is plugged in
Both front-panel LEDs on the	is not active.	and that the AC outlet is
DHD Controller are off (see		active.
Figure 2-3).	• The main power switch at	• Set the switch to the “on”
	the rear of the DHD	position.
	Controller (see Figure 2-4)
	is set to the “off” position.

5.1

Troubleshooting Tips

Neither the DHD Controller nor the projector turns on. On the DHD Controller, the Runco icon LED is off and the standby LED is on.

•The batteries in the remote control are dead or installed incorrectly.

•Press the ON/STANDBY ( ) button on the DHD Controller front panel. If the controller turns on, verify that the batteries in the remote control are good and properly installed (refer to Remote Control on page 13).

The DHD Controller turns on,	• The DHD Controller is	• Verify the RS-232 cable
but the projector does not.	connected to the Q-750d	connection from the DHD
	incorrectly or not at all.	Controller to the Q-750d
		(see Figure 3-10).
	• The Q-750d is not plugged	• Ensure that the Q-750d is
	in or the AC outlet is not	plugged in and that the AC
	active.	outlet is active.
The projector and DHD Con-	• Incorrect source selection.	• Select the correct source.
troller are both on and menus	• Source component is not	• Turn on the source
appear, but there is no video	turned on.	component.
image on-screen.
Image is too bright and/or	• Contrast is set too high.	• Lower the contrast setting.
lacks definition in the bright
areas of the image.
Image appears “washed out”	• Brightness is set too high.	• Lower the brightness
and/or dark areas appear too		setting.
bright.

Q-750d Series Installation/Operation Manual 71