1. INTRODUCTION 1-3 Precautions for Use of Head Cleaning Tape
For servicing |
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Refer to the service manual page. | “White blemish derection” | ||
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| 1. INTRODUCTION | ||
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Please use cleaning tape produced by JVC. Adhere to the following precautions when using the head cleaning tape.
1. Place the unit in the STOP mode.
2. The tape runs for 10 seconds at a time in the PLAY mode. (The tape stops automatically and then the unit enters the SAVE MODE.) Press the PLAY button after the cleaning tape is fully loaded.
3. Do not use the tape more than four times at the most for each cleaning.
4. The cleaning tape can be used approximately 100 times.
■Use the following chart as a guide for periodical head
cleaning.
Note 1) When used in a low humidity environment, head cleaning | |
| should be conducted at intervals half of those given in |
| the below chart. |
Note 2) | If an ME80 tape is used immediately after head cleaning, |
| the “HEAD CLEANING REQUIRED!” indicator may |
| remain on. In this case, let the tape run as the indicator |
| will turn off after the tape has run for a while. |
Note 3) | Use the cleaning tape in the room temperature (10˚C to |
| 35˚C). |
Note 4) | The cleaning tape case contains instructions for use of |
| the cleaning tape. However, some of these instructions |
| differ from the contents of this sheet. When using the |
| cleaning tape, please follow the instructions of this sheet. |
Note 5) | If the “HEAD CLEANING REQUIRED!” does not |
| disappear after repeated head cleanings, the recording |
| tape may be abnormal. Avoid excessive repeated use of |
| the head cleaning tape. |
● 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. |
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● Condensation occurs in the following cases: |
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• | When the unit is suddenly moved |
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| Head drum |
• | from a cold place to a warm place. |
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When a room heater has just started |
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| or when the unit is exposed directly |
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| to cold air from an air conditioner. |
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• | When the unit is placed in a very |
| Video tape | |
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| humid place. |
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Do not leave the videocassette inserted when moving the | ||||
camera under conditions where the temperature | ||||
environment changes. |
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● “CONDENSATION ON DRUM” is displayed on the LCD monitor and in the viewfinder when condensation occurs in this unit.
0201 CONDENSATION ON DRUM
Keep the power on until the warning message disappears.
● Pay attention to condensation even before the condensation indication appears.
• | As condensation forms gradually, | the condensation |
| indication may not appear for the first | |
Operating | Low temperature | Room temperature | High temperature |
environment | 0˚C to 10˚C | 10˚C to 35˚C | 35˚C to 40˚C |
Yardstick for use | 1 to 2 times | 1 to 2 times | 1 to 2 times |
of cleaning tape | every 5 hours | every 20 to 30 hours | every 5 hours |
After moving the unit, do not use until the internal parts |
have stabilized. |
| 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. |
1-4 Videocassette to be Used
●Use JVC’s videocassette tapes marked with the “ 
” or
“ 
” symbol.
Standard DV videocassette:
* Do not use |
● Videocassettes cannot be used upside down. |
● Avoid storing a videocassette with its tape not being |
completely wound, as this may damage the tape. Rewind |
it to the beginning before placing a cassette into storage. |
reduce the rotary head life.
●Videocassette tapes with the “ 
” or “ 
” symbol are provided with a switch on the back to prevent accidental erasure.
●Slide the switch to SAVE to protect the required recording in the tape from being overwritten.
●To record on the tape, slide the switch to REC.
Switch
● 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
● Store videocassettes in a place with little humidity and good |
ventilation where mould does not form. |
● After a videocassette tape has been used repeatedly, |
it becomes unable to maintain full performance due to |
an increase in noise caused by dropouts, etc. Do not |
continue to use a dirty or damaged tape, as this will |
1-5 Battery Pack to be Used
The
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To display the remaining battery power accurately, set the BATTERY TYPE item on the OTHERS (2/2) menu screen according to the type of the battery pack in use. (☞See page 78)
REC
SAVE
* | An |
| to the camera. It is necessary to mount the optional battery |
| holder. |
● Battery holder: | |
| For details on how to mount the battery holder, see page |
| 35. |
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 |
Monitor screen | (Blurring in highlight) |
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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
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