JVC GY-DV300U 108 pg. instruction manual on the GY-DV300U Pro-DV Camcorder (PD - Page 9

Routine and Periodical Maintenance The GY-DV300 incorporates precision mechanical parts, which will collect dirt, wear out and deteriorate as the unit is used. On the other hand, when the unit has been used for a long period in a normal environment, the heads, drums and tape transport mechanisms also accumulate dirt that is deposited on them. Furthermore, dust which penetrates the inside of the VCR section especially during outdoor use will promote the wear and deterioration of mechanical parts by causing poor contact between tape and heads or failure to maintain the video and audio quality at high levels. To prevent wear and deterioration, clean the mechanical parts using a head cleaning tape as routine maintenance. However, as cleaning with a head cleaning tape alone is not enough for cleaning the entire tape transport mechanism, it is also recommended to apply periodical maintenance (inspection) to prevent troubles that may be caused by the sudden occurrence of failure. As the replacement, adjustment and servicing of parts require advanced skill and equipment, please consult the person in charge of professional video equipment at your nearest JVC-authorized service agent. Head Cleaning ● To maintain beautiful video and sound, be sure to use a head cleaning tape to clean the head periodically. (Read "Precautions for Use of Head Cleaning Tape" on page 10.) If head cleaning is not performed periodically, a type of mosaic noise called block noise may appear in the picture or sound may be interrupted. Block Noise ● Use the optional head cleaning tape M-DV12CL. Do not use other than the designated head cleaning tapes. For instructions on how to use the head cleaning tape and precautions for its use, read "Precautions for Use of Head Cleaning Tape" on page 10. ● When dirt adheres to the video heads of the GYDV300, the warning message "HEAD CLEANING REQUIRED!" appears on the LCD screen and the viewfinder screen during edit search in the recording mode and during playback. Periodical Maintenance Contents: Check or replace the following mechanical parts according to the running time. Running Time Drum assembly (including heads) Head cleaner Tape guides & rollers Rotary encoder Belts & gears Drive parts 500H 1000H 1500H 2000H - - - - : Clean, check and adjust. : Clean and check. Replace as required. : Replace. • The maintenance contents vary depending on the operating environment and method. Therefore, the above data should be considered as a reference. Time management The accumulated running time of the unit can be confirmed with the hour meter display (which shows the accumulated drum running time). For details, see "Displaying the Hour Meter Display" on page 104. HEAD CLEANING REQUIRED! For consultations related to the maintenance programming or cost, please contact the person in charge of professional video equipment at your nearest JVC-authorized service agent. 9