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1. INTRODUCTION
1-3 Routine and Periodical Maintenance (Cont'd)
Head Cleaning
● To maintain beautiful pictures and sound, be sure to use a
head cleaning tape to clean the head periodically. (Read
"Precautions for Use of Head Cleaning Tape" on page 8.)
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
● Use the provided head cleaning tape. Do not use head
cleaning tapes other than specified. For instructions on how
to use the head cleaning tape and precautions for its use,
read "Precautions for Use of Head Cleaning Tape" on page
8.
● When dirt adheres to the heads of the GY-DV700W, the
following indications appear during playback and recording
check using the RET button on the lens section.
"RF" appears on the display panel.
•
"HEAD CLOG" appears on the counter display.
•
"VTR WARNING (HEAD)" appears in the viewfinder.
•
● If this kind of indication appears, please stop the recording.
Head cleaning is required. This indicator disappears when
the POWER is turned OFF, or when the cleaning tape is
played back.
CH 1
OVER
40 30
20
10
0 dB
CH 2
OVER
32k
48k
SP
AUD LOCK
MENU
"HEAD CLOG" indicator
1-4 Precautions for Use of Head Cleaning Tape
Adhere to the following precautions when using the head cleaning tape.
1. 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. However, the display back light is not turned off.)
Press the PLAY button after the cleaning tape is fully loaded.
2. Do not use the tape more than four times at the most for each cleaning.
3. The cleaning tape can be used approximately 100 times.
Use the following chart as a guide for periodical head cleaning.
Operating
environment
Yardstick for use
of cleaning tape
Note 1) When used in a low humidity environment (10% RH to 30% RH), head cleaning should be conducted at intervals half of
those given in the above chart.
Note 2) If an ME80 tape is used immediately after cleaning, the VTR warning (head) 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.
8
"RF" indicator
RF
Low temperature
Room temperature
0˚C to 10˚C
10˚C to 35˚C
1 to 2 times
1 to 2 times
every 5 hours
every 20 to 30 hours
Periodical Maintenance
Contents : Check or replace the following mechanical parts
according to the running time.
Running Time
500H
Drum ass'y (including heads)
Head cleaner
Tape guides & rollers
Rotary encoder
Belts & gears
Drive parts
: Clean, check and adjust.
: Clean and check. Replace as required.
: Replace.
• 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 92.
For consultations related to the maintenance programming
or cost, please contact the person in charge of professional
video equipment at your nearest JVC-authorized service
agent.
High temperature
35˚C to 40˚C
1 to 2 times
every 5 hours
1000 H
1500H
2000H
–
–
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