D439E Service Manual 5. Service Tool
207
• Do not expose the LCD to humidity.
• When LCD is broken, the liquid crystal material will be flown out. Do not contact liquid crystal. If you contact
it, clean it out immediately with soap and water.
• When LCD surface is contaminated, clean it using soft clothes with alcohol.
• Do not get volatile material except alcohol to LCD surface.
• Do not lay any heavy object down on LCD panel.
• After using for a long time, conduct zero calibration to the touch screen.
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