JVC GY-DV5001 Condensation, Characteristic CCD Phenomena, Smear and Blooming, Moire or Aliasing

1. INTRODUCTION

1-6 Condensation

●If the unit 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 (dewing). 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 ON DRUM” is displayed on the LCD monitor and in the viewfinder when condensation occurs in this unit.

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●Condensation occurs in the following cases:

•When the unit is suddenly moved from a cold place to a warm place.

•When a room heater has just started

or when the unit is exposed directly to cold air from an air conditioner.

•When the unit is placed in a very humid place.

Head drum

Video tape

CONDENSATION ON DRUM

Keep the power on until the warning message disappears.

● Pay attention to condensation even before the condensation

indication appears.

Do not leave the videocassette inserted when moving the camera under conditions where the temperature environment changes.

After moving the unit, do not use until the internal parts have stabilized.

• 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 2-

3 hours for the frost to first melt into condensation and

then to be dissolved.

● To prevent condensation when moving the unit from one place

to another where the temperatures are greatly defferent, first

remove the videocassette, place the unit in a tightly sealed

vinyl bag, and then move it to a new environment.

To ensure no condensation occurs, allow the temperature of

the unit in the bag to reach that of the new environment before

using it.

1-7 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 unit is characterized by inducing very little smear or blooming. Nevertheless, please take note that smear or blooming may be indured when shooting a bright light source.

Smear

(Vertical pale streaking appearing at high luminous object)

High luminous object (Electric light, sunlight, etc.)

	Blooming
	(Blurring in highlight)
Monitor screen

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 the unit under conditions where the temperature of the unit does not increase.

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