Panasonic TH-80LFB70U Operating Instructions Manual

Also see for TH-50LFB70E: Operating instructions Operating instructions

Contents

Panasonic TH-80LFB70U Operating Instructions Manual Manual pdf 82 page image

80TroubleshootingBefore you call for service, determine the symptoms and make a few simple checks as shown below.Symptoms ChecksPicture SoundInterference Noisy SoundElectrical AppliancesCars / MotorcyclesFluorescent lightNormal Picture No SoundVolume(Check whether the mute function has been activated on the remote control.)No Picture No SoundNot plugged into AC outletNot switched onPicture and Brightness/Volume setting(Check by pressing the power switch or stand-by button on the remotecontrol.)No Picture Normal SoundIf a signal with a non-applicable colour system format, or frequency is input, onlythe input terminal indication is displayed.No Colour Normal SoundColour controls set at minimum level (see page 51, 52)No remote control operations can be performed. 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 astrong uorescent light.Check whether the remote control designed specically for use with the unit isbeing used. (The unit cannot be operated by any other remote control.)A cracking sound is sometimes heard from the unit. If there is nothing wrong with the picture or sound, this is the sound of thecabinet undergoing very slight contractions in response to changes in the roomtemperature. There are no adverse effects on the performance or other aspects.The top or bottom of the picture on the screen is cutoff when I use the zoom function.Adjust the position of the picture on the screen.Areas at the top and bottom of the screen wherethe image is missing appear when I use the zoomfunction.When using a video software program (such as a cinema size program) with ascreen wider than one in the 16:9 mode, blank areas separate from the imagesare formed at the top and bottom of the screen.Parts of the unit become hot. Even when the temperature of parts of the front, top and rear panels has risen, thesetemperature rises will not pose any problems in terms of performance or quality.Power automatically turns off unexpectedly. Check the settings of “No signal power off”, “PC Power management”, “DVI-D Powermanagement”, HDMI1 Power management, HDMI2 Power management and “Noactivity power off”. Any of them may be set to “On (Enable)”. (see page 63, 67)There is no picture displayed or sound outputsometimes.When HDMI or DVI signals are input to the Display using a selector ordistributor, sound or images may not be output in the normal fashiondepending on the selector or distributor used.The symptoms may be improved by turning the power off and on again, or byreplacing the selector or distributor.Multi-touch operations cannot be performed. Check if the “Setup” - “Touch Screen Settings” is set to “On”. (see page 59)The touch panel is an optical device that uses infrared rays. Incident light thatcontains large quantities of infrared rays can prevent proper functioning. Movelight sources as far away from the touch panel as possible.Fluorescent light: Does not produce infrared light, so it does not causeproblems.Sunlight: Locate the touch panel where it is not exposed to direct sunlight.White candescent light: Contains the most infrared light and can readily affectthe touch panel. Move light sources as far away fromthe touch panel as possible.Strong external noise can cause the microcomputer inside the touch panel tomalfunction, therefore keep noise sources as far away as possible.Whirring sounds can be heard from the display unit. The display unit is tted with a cooling fan to dissipate heat generated during normaluse. The whirring sound is caused by rotation of the fan and is not a malfunction.The RS-232C is uncontrollable* Check whether the connection has been made properly. (see page 15)When controlling the RS-232C command on page 15 from the RS-232Cterminal in the display, make sure that “Control I/F Select” is “RS-232C”, andthat “Control I/F Select” is “RS-232C(DIGITAL LlNK)”, and “DIGITAL LINKmode” is “DIGITAL LlNK(RS-232C)” when controlling from the RS-232Cterminal of the DIGITAL LINK device.