Panasonic SC-DT310 [74/77] Maintenance

Содержание

Safety precautions Glossary Decoder Placement Set the unit up on an even surface away from direct sunlight high temperatures high humidity and excessive vibration These condi tions can damage the cabinet and other components thereby shortening the unit s service life Do not place heavy items on the unit A decoder restores the coded audio signals on DVDs to normal This is called decoding Dolby Digital This is a method of coding digital signals developed by Dolby Labo ratories Apart from stereo 2 channel audio these signals can also be multi channel audio A large amount of audio information can be recorded on one disc using this method DTS Digital Theater Systems Voltage Do not use high voltage power sources This can overload the unit and cause a fire Do not use a DC power source Check the source carefully when setting the unit up on a ship or other place where DC is used This surround system is used in many movie theaters around the world There is good separation between the channels so realistic sound effects are possible Dynamic range Dynamic range is the difference between the lowest level of sound that can be heard above the noise of the equipment and the highest level of sound before distortion occurs AC mains lead protection Film and video Ensure the AC mains lead is connected correctly and not damaged Poor connection and lead damage can cause fire or electric shock Do not pull bend or place heavy items on the lead Grasp the plug firmly when unplugging the lead Pulling the AC mains lead can cause electric shock Do not handle the plug with wet hands This can cause electric shock Foreign matter Do not let metal objects fall inside the unit This can cause electric shock or malfunction Do not let liquids get into the unit This can cause electric shock or malfunction If this occurs immediately disconnect the unit from the power supply and contact your dealer Do not spray insecticides onto or into the unit They contain flam mable gases which can ignite if sprayed into the unit Service Do not attempt to repair this unit by yourself If sound is interrupted indicators fail to light smoke appears or any other problem that is not covered in these instructions occurs disconnect the AC mains lead and contact your dealer or an authorized service center Elec tric shock or damage to the unit can occur if the unit is repaired disassembled or reconstructed by unqualified persons Extend operating life by disconnecting source if it is not to be used for a long time the unit from the power DVD Videos are recorded using either film or video Usually film is recorded at 24 frames per second the rate movies are filmed at while video is recorded at 30 frames per second Frame still and field still Frames are the still pictures that go together to make a moving pic ture There are about 30 frames shown each second One frame is made up of two fields A regular television shows these fields one after the other to create frames A still is shown when you pause a moving picture A frame still is made up of two alternating fields so the picture may appear blurred but overall quality is high A field still is not blurred but it has only half the information of a frame still so picture quality is lower Interlace and progressive output NTSC the video signal standard has 480 interlaced I scan lines whereas progressive scanning uses twice the number of scan lines This is called 480P The video signals output from this unit s COM PONENT VIDEO OUT terminals Y PB PH allow you to enjoy higher quality pictures than if the signals were output from the VIDEO OUT terminal or S VIDEO OUT terminal I P B MPEG 2 the video compression standard adopted for use with DVD Video codes frames using these 3 picture types I Intra coded picture This picture has the best quality and is the best to use when adjusting the picture P Predictive coded picture This picture is calculated based on past I or P pictures B Bidirectionally predictive coded picture This picture is calculated by comparing past and future I and P pictures so it has the lowest volume of information Linear PCM pulse code modulation These are uncompressed digital signals similar to those found on CDs Playback control PBC If a Video CD has playback control you can select scenes and information with menus Maintenance To clean this unit wipe with a soft dry cloth Never use alcohol paint thinner or benzine to clean this unit Before using chemically treated cloth read the instructions that came with the cloth carefully Before moving the unit ensure the disc tray is empty Failure to do so will risk severely damaging the disc and the unit 37