Routine And Periodical Maintenance; Videocassette To Be Used - JVC GY-DV500U Instructions Manual

1. INTRODUCTION

1-3 Routine and Periodical Maintenance

The GY-DV500 incorporates precision mechanical parts, which will collect dirt, wear out and deteriorate as the unit is used. On the
other hand, when the unit has been used for a long period in a normal environment, the heads, drums and tape transport mechanisms
also collect dirt deposited on them. Furthermore, dust which penetrates the inside of the VCR section especially 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, it is also recommended to apply periodical maintenance (inspection) to prevent troubles that may be caused by 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.
Head Cleaning
To maintain beautiful pictures and sound, be sure to use a
head cleaning tape to clean the head periodically. (Read the
separate sheet "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
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 the separate sheet "Precautions for Use of Head
Cleaning Tape".
When dirt adheres to the heads of the GY-DV500, 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 Videocassette to be Used

Use JVC's videocassette tapes marked with MiniDV for
this unit.
Please use DVM60 or DVM30 type videocassettes.
Videocassettes cannot be used upside down.
Avoid storing a videocassette with unevenly wound tape,
as this may damage the tape. Rewind it to the beginning
before placing a cassette into storage.
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
reduce the rotary head life.
Note that if an ME80 videocassette is used at low
temperatures, block noise tends to occur due to head
contamination.
8
"RF" indicator
RF
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.
Videocassette tapes marked MiniDV are provided with
a switch on the back for use in preventing 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.
REC
SAVE
1000 H 1500H 2000H
– –
Switch