Regular Maintenance; Cleaning Tape; Condensation - JVC BR-HD50 Instruction Manual

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 mainte-
nance using the head-cleaning tape. With the head-cleaning tape alone, however, the entire tape-wind-
ing mechanism cannot be completely cleaned.
Perform regular maintenance of the components as shown below.
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 500H 1000H 1500H 2000H G : Cleaning, inspection and adjust-
Drum assembly
G E
(including head)
Tape guide, roller
E
G
Belt gears —
E
Drive system parts
—
—
Usage Time : You can check the drum usage time with the hour meter display. For
details, refer to page 83, "Checking the hour meter".
Maintenance consultation : For details on the maintenance plan and fee, consult with your JVC-
authorized service agent.
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.
Block Noise
• For information on how to use the head
cleaning tape and the relevant remarks,
refer to Xpage 9, "Cleaning tape".
E-8
ment
E F E : Cleaning and inspection; Replace-
ment if necessary
E F F : Replacement
Work and frequency of maintenance
E F
depend on the environment and
F usage. The above information serves
E
only as a guide.
• If the head is dusty, "HEAD CLEANING
REQUIRED!" will be displayed on the moni-
tor when this unit plays a tape.
HEAD CLEANING REQUIRED!

Cleaning tape

Use a JVC cleaning tape.
Follow the instructions below for using the clean-
ing tape.
1.
Run the tape for 10 seconds in the PLAY
mode. (Thereafter, it stops automatically
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 environ- Low temperature
ment 5°C to 10°C
Frequency of cleaning 1 to 2 times every 5
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 fol-
lowing circumstances:
* It is moved abruptly
Head drum
from a cold place to
a warm place.
* It is used in a place
immediately after the
Videotape
heater has been turned
on, or when cold
breeze from an air-con-
ditioner 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.
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 dif-
ferent in part from those stated here.
Follow the instructions in this manual.
Room temperature High temperature
10°C to 35°C 35°C to 40°C
1 to 2 times every 20 to 1 to 2 times every 5
30 hours hours
• When condensation occurs, the monitor
displays the following warning:
CONDENSATION ON DRUM
Leave the unit with the power ON and wait
until the WARNING message disappears.
• 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.
E-9