Yamaha D2040 D2040 Owners Manual Image - Page 7

Error, Messages, Precautions, Connecting, Peripheral, Equipment

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ERROR MESSAGES When the power is applied to the unit, an automatic selfdiagnostic program is run. If any problems with the system are found as a result an error message will be flash on the Memory Number LED, consisting of the letter "E" and a number from 1 to 6. Be sure to remember this error message when requesting repairs. PRECAUTIONS WHEN CONNECTING PERIPHERAL EQUIPMENT Remember to take the following precautions when connecting the D2040 to peripheral equipment (with XLR type connectors). 1. Use Only Special Digital Audio Cables Use only digital audio cables of the following specifications when connecting peripherals through the AES/EBC and RS485 ports: impedance 90 to 120 K2, shield type, equalized cable. If conventional audio cables (impedance 40 to 50 52) are used, it is possible that the waveform of the transmission will be effected due to signal reflection caused by impedance maladjustment, or other problems will cause trouble and adversely effect the performance of the unit. This is especially important when connecting over distances of more than 10 meters (32 ft.) or in multiple connections. In these cases the possibility of waveform deformation is greater than under normal circumstances and the need for the proper cable becomes more acute. 2. Precautions When Using Digital Audio Cables (1) Connectors Be sure that the connector shell (case) and the shield wire of the cable are connected. (2) Cable Length Try to use the shortest cable possible. (3) Cable Extension Avoid extending cables through connectors whenever possible. (4) Parallel Connections Avoid the parallel connection of signal lines. However, if unavoidable, check the impedance and the transmission capability of the source unit and make every effort to shorten the distance of the parallel connection. (5) Other Precautions Treat cables with the same care given when using high frequency coaxial cables (do not bend, crush, etc.). 6

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ERROR
MESSAGES
When
the
power
is
applied
to
the
unit,
an
automatic
self
-
diagnostic
program
is
run.
If
any
problems
with
the
system
are
found
as
a
result
an
error
message
will
be
flash
on
the
Memory
Number
LED,
consisting
of
the
letter
"E"
and
a
number
from
1
to
6.
Be
sure
to
remember
this
error
message
when
requesting
repairs.
PRECAUTIONS
WHEN
CONNECTING
PERIPHERAL
EQUIPMENT
Remember
to
take
the
following
precautions
when
connecting
the
D2040
to
peripheral
equipment
(with
XLR
type
connectors).
1.
Use
Only
Special
Digital
Audio
Cables
Use
only
digital
audio
cables
of
the
following
specifications
when
connecting
peripherals
through
the
AES/EBC
and
RS
-
485
ports:
impedance
90
to
120
K2,
shield
type,
equalized
cable.
If
conventional
audio
cables
(impedance
40
to
50
52)
are
used,
it
is
possible
that
the
waveform
of
the
transmission
will
be
effected
due
to
signal
reflection
caused
by
impedance
maladjustment,
or
other
problems
will
cause
trouble
and
adversely
effect
the
performance
of
the
unit.
This
is
especially
important
when
connecting
over
distances
of
more
than
10
meters
(32
ft.)
or
in
multiple
connections.
In
these
cases
the
possibility
of
waveform
deformation
is
greater
than
under
normal
circumstances
and
the
need
for
the
proper
cable
becomes
more
acute.
2.
Precautions
When
Using
Digital
Audio
Cables
(1)
Connectors
Be
sure
that
the
connector
shell
(case)
and
the
shield
wire
of
the
cable
are
connected.
(2)
Cable
Length
Try
to
use
the
shortest
cable
possible.
(3)
Cable
Extension
Avoid
extending
cables
through
connectors
whenever
possible.
(4)
Parallel
Connections
Avoid
the
parallel
connection
of
signal
lines.
However,
if
unavoidable,
check
the
impedance
and
the
transmission
capability
of
the
source
unit
and
make
every
effort
to
shorten
the
distance
of
the
parallel
connection.
(5)
Other
Precautions
Treat
cables
with
the
same
care
given
when
using
high
frequency
coaxial
cables
(do
not
bend,
crush,
etc.).
6