Yamaha PC4002M Manuale operativo - Pagina 11
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INSTALLATION PRECAUTIONS
е
|f you are using long speaker cables, use the heavy
Speaker system
'gauge cables which are practical, in order to prevent
damping
factor
deterioration
and/or
power
loss
through the cable. The PC4002/4002M's
speaker
terminals allow you to use even the heavy gauge
cables.
е The PC4002/4002M produces 430W + 430W (into
8ohms) in stereo mode, and 1400W
(into 8ohms)
Power ampo Ф
іп mono mode, so use а speaker system which has
РО = РВ
sufficient capacity to handle this power comfortably.
You can protect speakers of lower rated input capacity
PO: Speaker continuous input power capacity (Noise
than the rated output power of the PC4002/4002M
or RMS)
by connecting a fuse directly between the speaker
Е:
Nominal impedance of speaker
and amplifier (see illustration). When using a system
l:
Required fuse capacity (A)
such as the one illustrated, follow the procedure on
[= /PO/R-
this page to determine the capacity of the fuse to
be used.
Example
Speaker continuous input power capacity
100W
Speaker impedance
8ohms
In this example
-/100/8
1+3.5A
IF THE CLIPPING AND
PROTECTION
CIRCUIT OPERATION
INDICATORS
LIGHT UP
лы
еве
|
a.
| ation
T
Cause
ation
Short in speaker termi- | Examine
the
places | The PC limiter is in op-
nal, amplifier output ter- | where shorting may have | eration,
protectiong
the
minal, or cable
occurred
power transistors
Clip indicator
Make
sure the speaker
system
impedance
is
more than 4ohms
when
in
stereo
mode,
and
8ohms
when
in
mono
mode
Amplifier overloaded
The same as above
Check
the
airflow
and
take appropriate
meas-
шев
to
keep
the
amplifier(s) cool
The thermal protection is
in operation,
protecting
the Power transistors.
Heatsink
temperature
Protection indicator
RISSE
exceeds 100°C
The protection relay is in
operation, protecting the
speaker system
A DC
voltage
of more
than 42V has occurred
at the output terminals
Contact
your
YAMAHA
distributor
or
service
center