Samsung LED 6400 Series E-Manual page 186

Using the "CI or CI+ CARD"
To watch paid channels, the "CI or CI+ CARD" must be inserted.
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If you don't insert the "CI or CI+ CARD", some channels will display the message "Scrambled
Signal".
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The pairing information containing a telephone number, the "CI or CI+ CARD" ID the Host ID and
other information will be displayed in about 2~3 minutes. If an error message appears please
contact your service provider.
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When the configuration of channel information has finished, the message "Updating Completed"
appears indicating the channel list is updated.
Requirements:
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You must obtain a "CI or CI+ CARD" from a local cable service provider.
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When removing the "CI or CI+ CARD", carefully pull it out with your hands since dropping the "CI
or CI+ CARD" may cause damage to it.
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Insert the "CI or CI+ CARD" in the direction marked on the card.
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The location of the COMMON INTERFACE slot may be different depending on the model.