Troubleshooting - Yamaha XP7000 Owner's Manual

Troubleshooting

The following table lists the main causes of abnormal operation and the corrective measures required as well as the protec-
tive circuit operation in each case.
Indicator(s)
There is a short at a speaker ter-
minal, amplifier terminal, or wire.
CLIP indicator lights.
The amplifier load is excessive.
The heat sink temperature has
TEMP indicator lights.
exceeded 85°C (185°F).
PROTECTION indica- The heat sink temperature has
tor lights. exceeded 90°C (194°F).
● XP3500, XP2500
Indicator(s)
A DC voltage of +2 V/-2 V or
PROTECTION indica-
greater was generated in the
tor lights.
power amplifier's output circuit.
● XP7000, XP5000
Indicator(s)
Power has been shut A DC voltage of +2 V/-2 V or
down. (All indicators greater was generated in the
are off.) power amplifier's output circuit.
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XP7000/XP5000/XP3500/XP2500/XP1000 Owner's Manual
Possible Cause
Locate and correct the cause of
the short.
Use a speaker system with an
impedance of at least 4 Ω (STE-
REO/PARALLEL mode) or 8 Ω
(BRIDGE mode).
Check the ventilation slots, and
provide better airflow around the
amplifier.
Check the amplifier ventilation
conditions and take appropriate
measures to improve the airflow
around the amplifier.
Possible Cause
Consult your dealer or the near-
est Yamaha service center.
Possible Cause
Consult your dealer or the near-
est Yamaha service center.
Remedy Protection Circuit
The PC limiter circuit
operates to protect the
power transistors.
The TEMP indicator
lights up to indicate tem-
perature warning.
The thermal protection
circuit operates to protect
the power transistors.
Remedy Protection Circuit
The relay operates to
protect the speaker sys-
tem.
Remedy Protection Circuit
The protection circuitry
shut off the power to pro-
tect the speaker system.