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Routine and Periodical
Maintenance
This device incorporates precision mechanical parts, which
will collect dirt, wear out and deteriorate as this device is
used. After this device has been used for a long period even
in a normal environment, the heads, drums and tape trans-
port mechanisms also collect dirt. Especially, dust which
penetrates the inside of the VTR 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 pre-
vent wear and deterioration, clean the mechanical parts
using a head cleaning tape as routine maintenance. How-
ever, 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 replace-
ment, adjustment and servicing of parts require advanced
skill and equipment, please consult the person in charge of
professional video equipment at your nearest JVC-autho-
rized service agent.
Head Cleaning
• To maintain beautiful pictures and sound, be sure to use a
head cleaning tape to clean the head periodically.
X See "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.
Block Noise
• Please use cleaning tape produced by JVC. Do not use
head cleaning tapes other than specified.
X See "Precautions for Use of Head Cleaning Tape"
about how to use the head cleaning tape and precautions
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 and record-
ing check using the RET button on the lens section.
Periodical Maintenance
Contents : Check or replace the following mechanical parts
according to the running time.
Usage Time
500H
Drum assembly (includ-
G
ing heads)
Tape guides, rollers
G
Belt gears
H
Drive parts
H
G: Clean, check and adjust.
E: Clean and check. Replace as required.
F: Replace.
1000H
1500H
2000H
E
E
F
E
E
F
E
E
F
H
E
F
• The maintenance contents vary depending on the operat-
ing environment and method. Therefore, the data in the
chart should be considered as a reference.
Time management
The accumulated running time of this device can be con-
firmed with the hour meter display (which shows the accu-
mulated drum and fan motor running time). X See "How to
Display the Hour Meter" on page 107.
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.
Precautions for Use of
Head Cleaning Tape
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/STILL 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 this device
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.
Low
Running
temperature
Operating envi-
0°C to 10°C
ronment
Yardstick
for
1 to 2 times ev-
use of cleaning
ery 5 hours
tape
Note 1)
When used in a low humidity environment, head
cleaning should be conducted at intervals half of
those given in the chart above.
Note 2)
If an M-DV80 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.
Room
High
temperature
temperature
10°C to 35°C
35°C to 40°C
1 to 2 times ev-
1 to 2 times ev-
ery 20 to 30
ery 5 hours
hours
7
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