User Manual

Reference — Troubleshooting
44
PX10/PX8/PX5/PX3 Reference Manual
Troubleshooting
Symptom Possible causes Possible solution
The display automatically turns off if the PX
amplifier has not been operated for a while.
For the protection of the display, the display automatically turns off if the
PX amplifier has not been operated for 20 minutes.
Press any key on the front panel or rotate the main knob to turn on the display
again.
If the Black-out mode is on, the back light of the display automatically
turns off when PX amplifier has not been operated for around 10 sec-
onds.
Press any key on the front panel to turn on the back light of the display. If the
Black-out mode is set to off, the back light does not turn off even if the PX
amplifier is not operated.
[PROTECT] indicator lights and an “OUTPUT
CURRENT OVER” message appears on the dis-
play.
There is a short at the speaker terminal, amplifier terminal or wire, and
circuit protection has been engaged.
Turn the power off and check for a short in the speaker terminal or amplifier,
wire, etc., and turn it on again.
Since the impedance of the connected speaker is excessively low and
the amplifier is overloaded, circuit protection has been engaged.
Check that the speaker has not been damaged and that total impedance is not
excessively low, and review the speaker connection.
[PROTECT] indicator lights and “AMP TEMP
TOO HIGH” message appears on the display.
Because the internal temperature is excessively high, thermal protection
has been engaged to protect the circuit.
Check the amplifier ventilation conditions and take appropriate measures to
improve the airflow around the amplifier. Leave the amplifier off until the internal
temperature goes down, and then turn it on again.
[CLIP/LIMIT] indicator lights.
Because the input signal is excessive or the output exceeds the rated
voltage, the signal is clipped or the limiter has been engaged to protect
the circuit.
Lower the output level of the device connected to the input connector, or lower
the volume of the amplifier.
Power does not turn on.
Power suddenly turned off, and immediately
turned off even when turning on again.
The power supply connected outlet is significantly different from the
rated range.
Check the source voltage.
Because the internal temperature is excessively high, thermal protection
has been engaged to protect the circuit.
Check the amplifier ventilation conditions and take appropriate measures to
improve the airflow around the amplifier. Leave the amplifier off until the internal
temperature goes down, and then turn it on again.
The output level is excessively high. Lower the output level.
The device is broken.
After disconnecting the speakers, turn on the device without inputting any sig-
nal, or lower the volume completely, turn on the device. If the symptoms do not
improve, the device is broken. Contact your Yamaha dealer.
Sound from speakers is distorted. The input level exceeds the setting of the input sensitivity.
Adjust the input sensitivity to match the input level with the CONFIG WIZARD
screen.
The sound is muffled. No high-frequency sound.
The sound is filtered. The filter status can be checked in the HOME
screen.
Change the setting of the filters in the MENU screen (TUNING screen).
When “ROUTING” is set to something other than
“DUAL,” the level of channel B is low.
The volume knob of channel B, with which the output balance to channel
A is adjusted, has been lowered.
Raise the volume knob of channel B.