Panasonic TH32LRT12U TH32LRT12U User Guide - Page 28

Troubleshooting Before you call for service, determine the symptoms and make a few simple checks as shown below. Symptoms Picture Sound Interference Noisy Sound Normal Picture No Sound No Picture No Sound No Picture Normal Sound Checks Electrical Appliances Cars / Motorcycles Fluorescent light Volume (Check whether the mute function has been activated on the remote control.) Not plugged into AC outlet Not switched on PICTURE and BRIGHTNESS/Volume setting (Check by pressing the power switch or stand-by button on the remote control.) If a signal with a non-applicable color system format, or frequency is input, only the input terminal indication is displayed. No Color Normal Sound Color controls set at minimum level. (see page 22) No remote control operations can be performed. A cracking sound is sometimes heard from the unit. The top or bottom of the picture on the screen is cut off when I use the zoom function. Areas at the top and bottom of the screen where the image is missing appear when I use the zoom function. Check whether the batteries have discharged completely and, if they have not, whether they were inserted properly. Check whether the remote control sensor is exposed to an outdoor light or a strong fluorescent light. Check whether the remote control designed specifically for use with the unit is being used. (The unit cannot be operated by any other remote control.) If there is nothing wrong with the picture or sound, this is the sound of the cabinet undergoing very slight contractions in response to changes in the room temperature. There are no adverse effects on the performance or other aspects. Adjust the position of the picture on the screen. When using a video software program (such as a cinema size program) with a screen wider than one in the 16:9 mode, blank areas separate from the images are formed at the top and bottom of the screen. This LCD Display uses special image processing. Hence a slight time lag may occur between image and audio, depending on the type of input signal. However, this is not a malfunction. LCD Display panel Symptoms It takes a while for the picture to appear. The edges of the images flicker. The brightness on both sides of images in 4:3 mode changes. There may be red spots, blue spots, green spots and black spots on the screen. Example Check The unit digitally processes the various signals in order to reproduce esthetically pleasing images. As such, it sometimes takes a few moments for the picture to appear when the power has been turned on, when the input has been switched or when the images for the main picture and sub picture on the two screens are swapped. Due to the characteristics of the system used to drive the panel, the edges may appear to flicker in the fast-moving parts of the images: This is normal and not indicative of malfunctioning. When viewing the side panels at the "BRIGHT" or "MID" setting, the brightness on both sides may change depending on the kind of program shown: This is normal and not indicative of malfunctioning. This is a characteristic of liquid crystal panels and is not a problem. The liquid crystal panel is built with very high precision technology giving you fine picture details. Occasionally, a few non-active pixels may appear on the screen as fixed points of red, blue, green, or black. Please note this does not affect the performance of your LCD. Image retention may occur. If you display a still picture for an extended period, the image might remain on the screen. However, it will disappear after a while. This is not considered as malfunction. Image retention appears 28