E-7
1. INTRODUCTION
Head Cleaning
●To maintain beautiful pictures and sound, be sure to use a
head cleaning tape to clean the head periodically. (Read the
“Precautions for Use of Head Cleaning Tape”.) 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.
●Please use cleaning tape produced by JVC. Do not use head
cleaning tapes other than specified. Read the precautions
and instructions for use of the head cleaning tape.
●When dust adheres to the heads, the warning message
“HEAD CLEANING REQUIRED!” is displayed on the LCD
monitor and in the viewfinder during playback, edit search,
and recording check using the RET button on the lens section.
The GY-DV5000 incorporates precision mechanical parts, which will collect dirt, wear out and deteriorate as the unit is used. After
the unit has been used for a long period even in a normal environment, the heads, drums and tape transport mechanisms also
collect dirt. Especially, dust which penetrates the inside of the VCR section during outdoor use will promote the wear and deterioration
of mechanical parts by causing poor contact between tape and heads or failing 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,
cleaning with a head cleaning tape alone is not enough for cleaning the entire tape transport mechanism, so it is also recommended
to apply periodical maintenance (inspection) to prevent 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.
1-2 Routine and Periodical Maintenance
Periodical Maintenance
Contents : Check or replace the following mechanical parts
according to the running time.
•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 “HOUR METER DISPLAY” on
page 94.
For consultations related to the maintenance planning or
cost, please contact the person in charge of professional
video equipment at your nearest JVC-authorized service
agent.
–
: Check
䡬: Clean, check and adjust.
夡: Clean and check. Replace as required.
䢇: Replace.
Running Time
500H
1000 H 1500H
2000H 4000H
Drum ass’y (including heads)
䡬䡬䡬䢇䢇
Head cleaner 夡䢇夡䢇䢇
Tape guides & rollers 䡬夡夡䢇䢇
Reel disc and tension bands
–夡–䢇䢇
Block Noise
Please use cleaning tape produced by JVC.
Adhere to the following precautions when using the head
cleaning tape.
1.
Insert the cleaning tape. Press the PLAY button after the
cleaning tape is fully loaded. The tape runs for 10 seconds
at a time in the PLAY mode. (The tape stops automatically
and then the unit enters the STOP MODE.)
2.
Do not use the tape more than four times at the most for
each cleaning.
■Use the following chart as a guide for periodical head
cleaning.
1-3 Precautions for Use of Head Cleaning Tape
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.
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