Allen&Heath DR66 SERVICE MANUAL - Manual (Page 6)

Section B 3
DR66 S ERVICE M ANUAL
INTRODUCTION
The information presented in this section of the manual is intended for competent technical
personnel to carry out service and product support for the DR66. We assume that the reader is
familiar with the related electronic theory and audio terminology, and is able to carry out basic
servicing, fault-finding and repair of digital audio equipment of this type. Service personnel should
also be familiar with audio systems, mains earthing and power requirements, as well as handling
precautions.
For information on the installation, operation and application of the DR66 please refer to section
A of this manual.
Whilst we believe the information in this manual to be reliable we do not assume responsibility for
inaccuracies. We also reserve the right to make changes in the interest of further product
development.
SERVICE AND TECHNICAL SUPPORT
Under normal operating conditions the DR66 does not require user maintenance or internal
calibration. Any service work required should be carried out by qualified technical personnel
only.
We are able to offer further product support through our worldwide distribution network. To
help us provide an efficient service please quote the unit serial number, the date and place of
purchase in any communication regarding this product.
SAFETY WARNING
Mains electricity is dangerous and can kill. Mains voltage is present within the
unit. Except for installation and calibration, do not remove any covers with power
connected. Do not carry out any work within the unit while it is powered. High
voltage components are insulated for safety but should not be touched with power
applied. The mains voltage setting is indicated on the AC mains input socket on
the rear panel. Check that this matches your local supply. Check your mains
wiring and earthing before switching on.
DO NOT REMOVE THE MAINS EARTH
CONNECTION!
The chassis is always connected to mains earth. Audio 0V connects to the
chassis internally. Should problems be encountered with ground loops, operate
the audio ground lift switches on other equipment connected to the unit or
disconnect the cable screens at one end. Refer to the section on ‘EARTHING’ in
the User Guide.