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INTRODUCTION
Regular maintenance
This unit uses consumables or components that will wear off. If a worn-out or deteriorated component continues to be used, it may cause the unit to break down. To prevent this, perform routine maintenance using the head-cleaning tape. With the head-cleaning tape alone, however, the entire tape-winding mechanism cannot be completely cleaned. Perform regular maintenance of the components as shown below.
Cleaning tape
Use a JVC cleaning tape. Follow the instructions below for using the cleaning tape.
Note
Under low humidity conditions, (10% RH to 30% RH), perform head cleaning at intervals of half of the periods stated in the table. If an M-DV80 tape is used immediately after cleaning, the message, �HEAD CLEANING REQUIRED!� may not disappear. It does only after the tape has run for some time. Use the cleaning tape at room temperature (10°C to 35°C). Instructions for using the cleaning tape stated on a sheet inside its storage case may be different in part from those stated here. Follow the instructions in this manual.
1. Run the tape for 10 seconds in the PLAY
mode. (Thereafter, it stops automatically
Regular maintenance
The tasks of maintenance involved are similar to that of replacing the engine oil or tire of a car. Depending on the number of usage hours, inspect or replace the components as follows: Number of hours Drum assembly (including head) Tape guide, roller Belt gears Drive system parts 500H 1000H 1500H 2000H G : Cleaning, inspection and adjustment G E E F E : Cleaning and inspection; Replacement if necessary G E E F F : Replacement � � E � E E F F Work and frequency of maintenance depend on the environment and usage. The above information serves only as a guide. Usage Time Maintenance consultation : You can check the drum usage time with the hour meter display. For details, refer to page 83, �Checking the hour meter�. : For details on the maintenance plan and fee, consult with your JVCauthorized service agent.
and enters the STOP mode.) � After loading the cleaning tape, press the PLAY button. 2. For a single cleaning session, it can be repeated up to 4 times.
3. Refer to the following table as a guide for
cleaning.
Operating environment
Low temperature 5°C to 10°C
Room temperature 10°C to 35°C
High temperature 35°C to 40°C
Frequency of cleaning 1 to 2 times every 5 1 to 2 times every 20 to 1 to 2 times every 5 hours 30 hours hours
Condensation
� When this unit is moved from a cold to a warm place abruptly, the vapor in the warm air will come into contact with the head drum or the tape guides, which are not warmed enough. When chilled, the vapor turns into droplets of water. This state is known as condensation. When condensation occurs, the videotape adheres to the head drum or the tape guides and will be damaged. � Condensation occurs on this unit in the following circumstances: * It is moved abruptly Head drum from a cold place to a warm place. * It is used in a place immediately after the heater has been turned on, or when cold breeze from an air-conditioner blows onto it. * It is used at a place of high humidity. When a cassette tape is loaded, do not transport e.g., from a cold outdoor place to a warm room thus subjecting the unit to drastic temperature changes. After moving the unit, do not use it until the inner mechanism stabilizes. � When condensation occurs, the monitor displays the following warning:
Head cleaning
� Recording or playing back with a dirty head will result in block noise or disrupted sound. Perform regular head cleaning to maintain superior image and sound quality. � If the head is dusty, �HEAD CLEANING REQUIRED!� will be displayed on the monitor when this unit plays a tape.
CONDENSATION ON DRUM
HEAD CLEANING REQUIRED!
Leave the unit with the power ON and wait until the WARNING message disappears.
Block Noise
� For information on how to use the head cleaning tape and the relevant remarks, refer to Xpage 9, �Cleaning tape�.
Videotape
� Prevention of condensation When transporting BR-HD50 from a cold to a warmer place abruptly, first remove the cassette tape. Then place BR-HD50 in a plastic bag and seal it before transporting. Take out BR-HD50 from the sealed plastic bag only after it has the same temperature as the surroundings.
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