Hitachi CMP4121HDU user manual Troubleshooting, Symptom Point to check, Vcr Ff, Rew

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TROUBLESHOOTING (continued)

Symptom	Point to check
• The temperature of the display panel	• The plasma display panel is lighting the
surface is high.	phosphors by the discharge of internal
	radiation. In some cases, this may cause
	the temperature of the panel surface to
	increase. Please note that this is not a
	malfunction.
• There are locations on the screen that	• High-precision technology is used to
are different from the periphery (*).	manufactue the plasma display panel,
*Points that do not light, points with	However in some cases, there are minor
brightness different from that of the	defects in some parts of the screen. Please
periphery, points with color different	note that this is not a malfunction.
from that of the periphery, etc.
• Vertical stripes appear, depending on the	• The plasma display panel is lighting the
screen contents.	phosphors by the discharge of internal
	radiation. Depending on the screen
	contents, in rare cases this may cause
	vertical stripes to appear because of failure
	to light. Please note that this is not a
	malfunction.
• Coarse horizontal stripes appear in FULL	• Adjusting the phase will reduce the
display.	horizontal stripes.
	(RGB input)
• The display dims to make the picture	• This condition may occur when the unit is
invisible during special playback of a	connected to a VCR with component output,
VCR (FF, REW).	such as 480i, but it is not a failure. But when
	it occurs, switch to composite output or S1
	(S2) output).
• Flickering in the form of horizontal lines	• If the direct frequency from the computer is
oscillating up and down.	below 85Hz, try a higher frequency (upper
	limit 85Hz). There may be a slight
	attenuation of the current image.
• The fan motor is noisy.	• Use the fan that controls the temperature in
	the main body to lower the temperature of
	this unit. If the ambient temperature is high,
	the noise from the motor increases as the
	rotation speed increases.This is not a
	malfunction.
• The top of the monitor heats up.	• When used for long periods of time, the top
	of the monitor may heat up. This is not a
	malfunction.

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