143Additional InformationMoving a memory card rapidly between hot and cold temperatures may cause condensation to formon its external and internal surfaces. If condensation forms on the card, put it aside until the dropletshave evaporated completely.Do not touch or expose the terminals to dust or dirt.Check the direction before inserting the memory card. Forcing a memory card backwards into theslot may damage the memory card or the camcorder.Do not remove the label from the memory card, or attach other labels to the memory card.When you erase image files or initialize the memory card, only the file allocation table is altered andthe data itself is not actually deleted. Take the necessary precautions when you dispose of thememory card, for example by physically damaging it to prevent the leakage of private data.SD/SDHC memory cards have a physical switch to prevent writing on the cardso as to avoid the accidental erasure of the card’s content. To write-protect thememory card set the switch to the LOCK position.Built-in Rechargeable Lithium BatteryThe camcorder has a built-in rechargeable lithium battery to keep the date/time and other settings. Thebuilt-in lithium battery is recharged while you use the camcorder; however, it will become totallydischarged if you do not use the camcorder for about 3 months.To recharge the built-in lithium battery:Connect the compact power adapter to the camcorder and leave it connected for 24 hours with thecamcorder off.Video HeadsWhen the message “HEADS DIRTY, USE CLEANING CASSETTE” appears, when the playbackpicture becomes distorted, or if during playback of a tape recorded in HDV standard the pictureand/or sound stops momentarily (about 0.5 seconds) the video heads need to be cleaned.To maintain the best picture quality, we recommend cleaning the video heads frequently with theCanon DVM-CL Digital Video Head Cleaning Cassette or a commercially available dry cleaningcassette.Tapes already recorded with dirty video heads may not be played back correctly even after cleaningthe video heads.Do not use wet type cleaning cassettes as this may damage the camcorder.If the playback picture does not improve after cleaning the video heads it may indicate a malfunction.Consult a Canon Service Center.LOCK switch