JVC GY-HD250U 117 page operator's manual for the GY-HD250U - Page 13

e_hd250.book Page 9 Tuesday, October 24, 2006 3:11 PM Condensation • If this device has been cooled down in a cold place and is then carried to a warm place, the moisture contained in the warm air may adhere to the head drum or tape guides and be cooled into water droplets. This phenomenon is referred to as condensation (dew). When this occurs, the head drum and tape guides are covered with droplets allowing the tape to be stuck to them, leading to tape damage. • Condensation occurs in the following cases: • When this device is suddenly moved from a cold place to a Head drum warm place. • When a room heater has just started or when this device is exposed directly to cold air from an air conditioner. • When this device is placed in a Video tape very humid place. Do not leave the videocassette inserted when moving the camera under conditions where the temperature environment changes. After moving this device, do not use until the internal parts have stabilized. • "CONDENSATION ON DRUM" is displayed on the LCD monitor and in the viewfinder when condensation occurs in this device. eocassette, place this device in a tightly sealed vinyl bag, and then move it to a new environment. To ensure no condensation occurs, allow the temperature of this device in the bag to reach that of the new environment before using it. Characteristic CCD Phenomena Smear and Blooming Due to the physical structure of a CCD it is possible to induce vertical streaking (called "smear") when shooting an extremely bright light source. Another effect is the expansion of light around a bright light or object (called "blooming"). The CCD employed in this device is characterized by inducing very little smear or blooming. Nevertheless, please take note that smear or blooming may be induced when shooting a bright light source. Smear Vertical pale streaking appearing at high luminous object Monitor screen High luminous object (Electric light, sunlight, etc.) Blooming Blurring in highlight Moire or Aliasing Shooting stripes or fine patterns may cause a jagged effect or a banding in fine mesh patterns. White dots High temperatures can cause CCD sensor pixels to produce the effect of white dots in the image. This condition is conspicuous especially when gain is applied. This is a characteristic of the charged-coupled device (CCD). As far as possible, use this device under conditions where the temperature of this device does not increase. Keep the power on until the warning message disappears. If the power is turned off while the warning message is displayed, condensation may remain in the device even if the warning message is not displayed. Wait until this device is completely dry before using. • Pay attention to condensation even before the condensation indication appears. As condensation forms gradually, the condensation indication may not appear for the first 10-15 minutes after condensation has formed inside. In an extremely cold place, the condensation could freeze and turn into frost. In such a case, it takes an additional 23 hours for the frost to first melt into condensation and then to be dissolved. • To prevent condensation When moving this device from one place to another where the temperatures are greatly deferent, first remove the vid- 9