Runco CX-70DHD operation manual Maintenance and Troubleshooting, Cleaning, Troubleshooting Tips

5. Maintenance and Troubleshooting

Regular cleaning will extend the life and performance of the CX-70DHD. Before cleaning, be sure to unplug the power cord from the power outlet.

Do not under any circumstances use solvents such as benzene or thinner to clean the CX-70DHD. Doing so may cause deterioration or peeling of paint from the display or remote control unit.

Wipe the display and remote control gently with a soft cloth. In the case of excessive dirt buildup, dampen a soft cloth with a diluted neutral cleaning detergent and after wringing the cloth thoroughly, wipe the component and then dry it with a dry soft cloth.

5.1 Cleaning

Cleaning the Display

Panel Body and Remote

Control

After dusting, wipe the screen gently using the supplied cleaning cloth or another soft cloth (cotton, flannel etc.). Do not use tissue or a rough cloth. The screen surface is easily scratched; do not rub it or hit it with a hard object.

If you clean the surface of the screen with a wet cloth, water droplets on the surface may enter into the product and cause a malfunction.

As a general rule, use a vacuum cleaner about once a month to clean the vents on the rear panel of the display of dust buildup (set the vacuum cleaner to its weakest setting when doing this). If not removed, accumulated dust can cause the internal temperature to increase, resulting in possible breakdown or fire.

Table 5-1provides some general guidelines for troubleshooting problems you may encounter with the CX-70DHD. If the suggested solutions fail to resolve the problem or if you encounter an issue not described here, please contact your Runco dealer or Runco Technical Support.

Table 5-1. Troubleshooting Chart

Symptom		Possible Cause(s)	Solution
The display does not turn on	•	The CX-70DHD is not	• Ensure that the CX-70DHD
after initial installation.		plugged in or the AC outlet	is plugged in and that the
		is not active.	AC outlet is active.
	• The DHD Controller is not		• Ensure that the DHD
		plugged in or the AC outlet	Controller is plugged in
		is not active.	and that the AC outlet is
			active.
	•	The remote control	• Replace the batteries.
		batteries have run out.
	• The serial connection from		• Ensure that the RS-232
		the DHD Controller to the	(Display Control) output
		CX-70DHD is incorrect.	from the DHD Controller is
			properly connected to the
			RS-232C input on the
			CX-70DHD (see Figure 3-4
			or Figure 3-5).

Cleaning the Screen

Cleaning the Vents

5.2

Troubleshooting Tips

CX-70DHD Installation/Operation Manual 57