Runco VX-44D, VX-55D manual 1. Troubleshooting Chart continued, Maintenance and Troubleshooting

Maintenance and Troubleshooting

Table 5-1. Troubleshooting Chart (continued)

Symptom		Possible Cause(s)		Solution
The display is jittery or	•	Poor-quality or improperly	• Ensure that the source is
unstable.		connected source.		properly connected and of
				adequate quality for
				detection.
	• The horizontal or vertical		• Correct at the source.
		scan frequency of the
		input signal may be out of
		range for the projector.
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.
Colors in the image are	•	The Red/Pr, Green/Y or	• Ensure that the source
swapped; for example, reds		Blue/Pb outputs from the		outputs are connected to
appear blue or vice versa.		source are connected to		the correct DHD Controller
		the wrong inputs on the		input.
		DHD Controller.
The display freezes suddenly.	•	Excessive voltage noise on	• Power down the projector
		the AC or ground input has		and disconnect from AC.
		interrupted the projector’s		Then, plug in again and
		ability to lock on to a		power up as usual.
		signal.
The projector will not turn	•	The projector will not turn	• Wait until the LED at the
back on after it was powered		on for two minutes after		front of the DHD Controller
down, or the image disap-		power-down, to protect		turns red.
pears during operation.		the lamp.
	• The lamp has failed.		•	Replace the lamp.
AutoScope lens motor does	•	The motor is not plugged	• Ensure that the motor is
not work.		in or the AC outlet is not		plugged in and that the AC
		active.		outlet is active.
	• The motor is not		•	Check the trigger
		connected to a trigger		connection between the
		output on the DHD		lens motor and DHD
		Controller.		Controller (Figure 3-13).
	•	Incorrect trigger	•	Correct the trigger
		assignment.		assignment (refer to
				Configure Lens Motor
				Trigger (CineWide with
				AutoScope) on page 40).

84 Runco VX-44d/-55d Owner’s Operating Manual