
The effect of environmental vibration and
sound pressure on the internal hard disk
when the R-4/R-4 Pro is operating
The R-4/R-4 Pro’s internal hard disk is a precision device, and needs to write data to precise locations on
its high-density media.
When using the R-4/R-4 Pro, please observe the following points in order to avoid factors (environmental
vibration and sound pressure) that may hinder correct operation of the hard disk.
• Do not place the unit in unstable locations or where it will be subject to vibration. If the location may
be subject to vibration, place the unit on material that provides insulation against vibration, such as a
folded blanket, so vibration is not transmitted to the unit.
• If sound pressure around the R-4/R-4 Pro is extremely high, as when it is used in a high-volume live
concert or near an amplified speaker(*1), place a folded blanket or other thick, soft material on the side
of the R-4/R-4 Pro that is toward the source of the sound pressure in order to minimize the vibration
caused by the sound pressure.
When doing so, leave part of the R-4/R-4 Pro uncovered, and ensure that there is a path for air to carry
away the heat so that the temperature around the unit does not exceed 40 degrees C.
If you cover the unit entirely, heat will be trapped in it, possibly causing a malfunction due to
overheating.
(*1) 110 dB or louder; such as under a railway crossing, or an automobile horn (two meters away).
Detecting the effects of vibration or sound pressure
Symptoms like the following will appear if the effects of vibration or sound pressure are interfering with
the internal hard disk’s reading or witing.
• The movement of the time counter or level meter will become much slower than normal.
• (During recording) The time counter value will gradually drift away from the total time value.
Display
If such symptoms continue for a while, the “HDD Slow” message will appear and the recorded data will
be lost at that point. If you notice the above symptoms, you should immediately move the R-4/R-4 Pro to
a location free of vibration and sound pressure, or take the measures described above for mitigating the
vibration and sound pressure.
R-4 R-4 Pro
Total
recording time
Time
counter
Level
meters
Total
recording time
Time
counter
Level
meters
Copyright © 2006 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form
without the written permission of ROLAND CORPORATION.
R-4 / R-4 Pro
R-4_note_e1 3 ページ 2006年9月27日 水曜日 午前11時13分