Runco Q-750I operation manual 1.Troubleshooting Chart continued, Maintenance and Troubleshooting

Maintenance and Troubleshooting

Table 5-1. Troubleshooting Chart (continued)

Symptom		Possible Cause(s)	Solution
RGB-HD images appear	•	Tracking and Phase	• Manually adjust Tracking
“noisy.”		settings need adjustment.	and Phase settings (refer
			to Fine Sync on page 59).
LED is flashing red.	•	Q-750i internal	• Power off the Q-750i and
		temperature is too high	allow it to cool down.
		(Note).	Ensure that the intake and
			exhaust vents are not
			blocked. Turn the
			projector back on. If the
			problem persists, please
			contact Runco Technical
			Support for assistance.
LED lights solid red.	• Fans are not working		• Power off the Q-750i and
		properly or power-on	allow it to cool down. Turn
		self-test has failed (Note).	the projector back on. If
			the problem persists,
			please contact Runco
			Technical Support for
			assistance.
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.

72 Q-750i Series Installation/Operation Manual