Philips HDRW720/69 Operating Instructions Manual page 16

The built-in HDD of this DVD recorder is sensitive to shocks,
temperature fluctuations, and vibrations.
Please observe the following precautions:
Avoid shocks or vibrations
Do not cover the ventilation openings of the cooling fan
Do not operate the device under high temperatures, and do not
expose it to temperature fluctuations
Do not pull the mains plug from the wall outlet before the device
is switched off using STANDBY m .
Before bringing the device to a workshop for repair, store all
important data of the HDD on a DVD+RW/+R. See 'The archive
function'.
The workshop will not assume any liability for the loss of the
stored data.
The following symbols will facilitate the use of these operating
instructions.
1 Step(s) for carrying out an operation.
Another possible operating step that is not absolutely
necessary.
P
Reaction of the device
When only one operation step is necessary
Some malfunctions (frozen or distorted picture and broken sound for
example) may be due to dirt on the disc. To avoid such problems, you
should clean your discs regularly.
Dirty discs should be cleaned with a soft cloth. Always wipe from
the middle to the edge.
Do not use any solvents such as benzine, thinners, commercially
available cleaning agents, or antistatic sprays designed for vinyl
records.