Sony SVT-S480ES Mode D'emploi page 50

Maintenance
We recommend you check the VCR daily to confirm
that the VCR works correctly.
When the security lock is in effect, release it before
operating.
Perform the following checks before starting to record.
1
Turn on the camera, monitor, and this VCR.
2
Confirm that the picture from the camera appears
on the monitor screen.
3
Confirm that the time and date display on the
monitor is correct.
4
To check the recording condition of the previous
day, rewind the tape for a few seconds and play
back the tape.
5
Confirm that playback is normal.
6
Confirm that recorded time and date information is
correct.
If you find any malfunction, switch all equipment off,
unplug the VCR from the AC outlet, and consult your
Sony dealer.
Cleaning Video Heads
After prolonged use, the video heads may become
contaminated, which results in impaired picture quality
(snow) or loss of picture. To avoid this, clean the video
heads regularly.
Replacing Video Heads
If optimum picture quality is not restored even after
you have cleaned the video heads, head replacement
may be necessary. Please consult your Sony dealer.
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Checking the Video Heads Every
1000 Hours
A VCR is a high-precision piece of equipment because
it records or plays back the picture on a magnetic tape.
In particular, the video head and other mechanical
parts become dirty or worn. To maintain a clean
picture, we recommend maintenance every 1000
hours.
To identify the service time, display the USED HOUR
screen. (See page 26.)
Maintaining Mechanical Parts
When not used for long periods, the VCR should be
switched on now and then set to the playback mode for
about three minutes. This helps to prevent mechanical
deterioration.
Servicing Periodically
To maintain optimum operating conditions and picture
quality, periodic servicing (cleaning, lubrication, parts
replacement) is necessary.
Please consult your Sony dealer.
If the VCR is to be used for critical monitoring
purposes, it may be preferable to perform servicing at
shorter intervals.