Trouble Shooting - Yamaha EMX 600 Service Manual

EMX660
QQ
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TROUBLE SHOOTING

Problem
The POWER
indicator is
dark.
Sound is no
longer out-
put from the
speakers.
The POWER
indicator is lit.
TE
L 13942296513
Other
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Cause
The load on this device was too great,
and the protection circuit for the inter-
nal transformer has operated. Possi-
ble reasons for the excessive load are
an excessive input to the device, or inap-
propriate ventilation.
The load on the amplifier of this device
was too great, and the protection cir-
cuit for the amplifier has operated.
Possible reasons for the excessive load
are an excessive level setting in the
channel control section or main section,
insufficient ventilation, or insufficient
load impedance of the connected speak-
ers.
Connections between devices have
come loose.
Other
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Please wait. When the device cools off, normal
operation will resume automatically. However,
please check the following two points to prevent the
problem from recurring.
If the input to this device is greater than the nominal
level, lower the input to the nominal level. If the
device is not ventilated sufficiently, refer to the cau-
tions given at the beginning of this manual and take
appropriate measures to insure adequate ventila-
tion.
Please wait. When the device cools off, normal
operation will resume automatically. However,
please check the following three points to prevent
the problem from recurring.
If the level setting is excessive, lower it to the nomi-
nal level. You can refer to the peak level indicators
of the main section when doing so.
If the device is not ventilated sufficiently, refer to the
cautions given at the beginning of this manual and
take appropriate measures to insure adequate ven-
tilation.
If the load impedance (including a short) is too low,
and change the connections so that the impedance
is correct.
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Inspect the connections, and correct any faulty con-
nections.
The device may have malfunctioned.
co
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Action
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