LG LA62 Series Owner's Manual page 167

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‫ﺍﻟﺘﺠﻤﻴﻊ ﻭﺍﻟﺘﺤﻀﻴﺮ‬
12
‫ﻣﻼﺣﻈﺔ‬
‫ﺩﻟﻴﻞ ﺗﺜﺒﻴﺖ ﻋﺎﺯﻝ ﺍﻟﻬﻮﺍﺋﻲ‬
.‫ ﺍﻟﺨﺎﺹ ﺑﺈﺷﺎﺭﺓ ﺍﻟﻬﻮﺍﺋﻲ‬GND ‫ﺍﺳﺘﺨﺪﻡ ﻫﺬﺍ ﺍﻟﻌﺎﺯﻝ ﻟﺘﺜﺒﻴﺖ ﺍﻟﺘﻠﻔﺎﺯ ﻓﻲ ﻣﻜﺎﻥ ﻳﻮﺟﺪ ﻓﻴﻪ ﺗﻔﺎﻭﺕ ﻓﻲ ﺍﻟﻔﻮﻟﺘﻴﺔ ﺑﻴﻦ ﺍﻟﺘﻠﻔﺎﺯ ﻭ‬
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‫ ﺍﻟﺨﺎﺹ ﺑﺈﺷﺎﺭﺓ ﺍﻟﻬﻮﺍﺋﻲ، ﻓﻴﻤﻜﻦ ﺃﻥ ﺗﺮﺗﻔﻊ ﺣﺮﺍﺭﺓ ﻭﺣﺪﺓ ﺍﻻﺗﺼﺎﻝ ﺑﺎﻟﻬﻮﺍﺋﻲ ﻭﻗﺪ ﺗﺆﺩﻱ ﺍﻟﺤﺮﺍﺭﺓ ﺍﻟﻤﻔﺮﻃﺔ ﺇﻟﻰ‬GND ‫ﺇﺫﺍ ﻛﺎﻥ ﺛﻤﺔ ﺗﻔﺎﻭﺕ ﻓﻲ ﺍﻟﻔﻮﻟﺘﻴﺔ ﺑﻴﻦ ﺍﻟﺘﻠﻔﺎﺯ ﻭ‬
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.‫ﻭﻗﻮﻉ ﺣﺎﺩﺙ‬
‫ﻟﻤﺰﻳﺪ ﻣﻦ ﺍﻷﻣﺎﻥ ﻋﻨﺪ ﻣﺸﺎﻫﺪﺓ ﺍﻟﺘﻠﻔﺎﺯ، ﻳﻤﻜﻨﻚ ﺇﺯﺍﻟﺔ ﻓﻮﻟﺘﻴﺔ ﺍﻟﻄﺎﻗﺔ ﻣﻦ ﻫﻮﺍﺋﻲ ﺍﻟﺘﻠﻔﺎﺯ ﺑﺼﻮﺭﺓ ﻓﻌﺎﻟﺔ ﺃﻛﺜﺮ. ﻳﻮﺻﻰ ﺑﺘﻌﻠﻴﻖ ﺍﻟﻌﺎﺯﻝ ﻋﻠﻰ ﺍﻟﺤﺎﺋﻂ. ﺍﺫﺍ ﻛﺎﻥ ﻻ ﻳﻤﻜﻦ ﺗﺜﺒﻴﺘﻪ‬
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.‫ﻋﻠﻰ ﺍﻟﺤﺎﺋﻂ، ﻗﻢ ﺑﺘﻌﻠﻴﻘﻪ ﻋﻠﻰ ﺍﻟﺘﻠﻔﺎﺯ. ﺗﺠ ﻨ ّ ﺐ ﻓﺼﻞ ﻋﺎﺯﻝ ﺍﻟﻬﻮﺍﺋﻲ ﺑﻌﺪ ﺍﻟﺘﺜﺒﻴﺖ‬
.‫ﺗﺄﻛﺪ ﻣﻦ ﺗﻮﺻﻴﻞ ﻫﻮﺍﺋﻲ ﺍﻟﺘﻠﻔﺎﺯ ﻗﺒﻞ ﺍﻟﺒﺪء‬
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.‫1.ﺍﻻﺗﺼﺎﻝ ﺑﺎﻟﺘﻠﻔﺎﺯ‬
‫ﺍﻟﺤﺎﺋﻂ‬
ANTENNA/
CABLE IN
‫ﺃﻭ‬
‫ﺍﻟﻜﺒﻞ / ﺍﻟﻬﻮﺍﺋﻲ‬
‫ﺍﻟﻌﺎﺯﻝ‬
.Set-Top box ‫2. ﺍﻻﺗﺼﺎﻝ ﺑﺠﻬﺎﺯ‬
.Set-Top box ‫ﻗﻢ ﺑﺘﻮﺻﻴﻞ ﺃﺣﺪ ﻃﺮﻓﻲ ﺍﻟﻌﺎﺯﻝ ﺑﻤﻘﺒﺲ ﺍﻟﻜﺒﻞ/ﺍﻟﻬﻮﺍﺋﻲ ﻭﺍﻟﻄﺮﻑ ﺍﻟﺜﺎﻧﻲ ﺑﺎﻟﺘﻠﻔﺎﺯ ﺃﻭ ﺟﻬﺎﺯ‬
‫"ﻣﻦ ﺷﺄﻥ ﺍﻷﺟﻬﺰﺓ ﺍﻟﻤﺘﺼﻠﺔ ﺑﻮﺣﺪﺓ ﺍﻟﺘﺄﺭﻳﺾ ﺍﻟﻮﺍﻗﻴﺔ ﺍﻟﺨﺎﺻﺔ ﺑﺎﻟﻤﺒﻨﻰ ﻋﺒﺮ ﺍﻻﺗﺼﺎﻝ ﺍﻟﺮﺋﻴﺴﻲ ﺃﻭ ﻋﺒﺮ ﺃﺟﻬﺰﺓ ﺃﺧﺮﻯ ﻣﺘﺼﻠﺔ ﺑﻮﺣﺪﺓ ﺍﻟﺘﺄﺭﻳﺾ‬
‫ﺍﻟﻮﺍﻗﻴﺔ - ﺑﺎﻹﺿﺎﻓﺔ ﺇﻟﻰ ﺍﻷﺟﻬﺰﺓ ﺍﻟﻤﺘﺼﻠﺔ ﺑﻨﻈﺎﻡ ﺗﻮﺯﻳﻊ ﺍﻟﻜﺒﻞ ﺑﺎﺳﺘﺨﺪﺍﻡ ﻛﺒﻞ ﻣﺤﻮﺭﻱ ، ﺃﻥ ﺗﺆﺩﻱ ﻓﻲ ﺑﻌﺾ ﺍﻷﺣﻴﺎﻥ ﺇﻟﻰ ﻧﺸﻮﺏ ﺣﺮﻳﻖ. ﻭﺑﺎﻟﺘﺎﻟﻲ‬
‫ﻳﺠﺐ ﺗﻮﻓﻴﺮ ﺍﻻﺗﺼﺎﻝ ﺑﻨﻈﺎﻡ ﺗﻮﺯﻳﻊ ﺍﻟﻜﺒﻞ ﻋﺒﺮ ﺟﻬﺎﺯ ﻳﻘﻮﻡ ﺑﺘﻮﻓﻴﺮ ﻋﺰﻝ ﻛﻬﺮﺑﺎﺋﻲ ﻣﺎ ﺩﻭﻥ ﻧﻄﺎﻕ ﺗﺮﺩﺩ ﻣﻌ ﻴ ّﻦ )ﻋﺎﺯﻝ ﺟﻠﻔﺎﻧﻲ، ﻳﺮﺟﻰ ﻣﺮﺍﺟﻌﺔ‬
"(EN 60728-11
.‫ﻋﻨﺪ ﺗﺜﺒﻴﺖ ﻋﺎﺯﻝ ﺍﻟﺘﺮﺩﺩ ﺍﻟﺮﺍﺩﻳﻮﻱ، ﻗﺪ ﻳﻨﺨﻔﺾ ﻣﺴﺘﻮﻯ ﺣﺴﺎﺳﻴﺔ ﺍﻹﺷﺎﺭﺓ ﻋﻠﻰ ﻧﺤﻮ ﺧﻔﻴﻒ‬

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