manual

Reference — Troubleshooting
45
PX10/PX8/PX5/PX3 Reference Manual
* If any specific problem should persist, contact your Yamaha dealer.
No sound from speakers.
Cables are not connected appropriately. If the meter does not rise even if
raising the volume knob, there may be problems in connectivity at the
input side. If the meter rises, there may problems at the output side.
Connect to input jacks and output terminals appropriately. At the output side,
make sure that terminals outputting signals are connected. Refer to “Usage
examples” (page 4) for connection instructions.
The outputs of the mixer connected to the input jacks are lowered. There
is a possibility that the meter does not rise even if the volume knob is
raised.
Raise the output of the mixer.
Level has been lowered with the volume knob. Adjust the volume knob accordingly.
The mute is on. When the mute is on, “MUTE” appears in the HOME
screen.
Turn off the mute.
The protection circuit has been engaged and the output is muted. When
the protection circuit is engaged, the [PROTECTION] indicator lights.
Identify what is causing the protection circuit to engage and solve it.
The speaker type is Power Boost mode (PX5 and PX3 only).
In Power Boost mode, audio signals are not output from channel B. Cancel
Power Boost mode or reconnect the cables.
The panel controls cannot be operated. The panel lock is turned on.
Turn off the panel lock. Refer to “Panel lock”(page 14) for instructions on turn-
ing off the panel lock.
The parameter settings need to be returned to
their initial values.
—
Return the settings to the initial values. To do this, refer to “Initializing the PX
amplifier” (page 37).
An indicator does not light in a condition in which
it normally should light. The display is blank.
The Black-out mode is on.
To temporarily make the indicators light and the display work, operate the
panel. To make the indicators light and the display work regularly, turn off the
Black-out mode. Refer to “PANEL SETUP” (page 34) in UTILITY screen.
The display is dark.
The “BRIGHTNESS” in PANEL SETUP screen is set to low value. Set the “BRIGHTNESS” to a higher value.
For protection of the display, if there is no operation for one minute, the
display automatically darkens.
To turn on the display again, simply press any key on the front panel or rotate
any knob.
After starting up again, parameters you’ve edited
have returned to the values before editing.
The device was shut down before the current parameters were stored
automatically.
When the device is shut down, wait more than 3 seconds after editing current
parameters.
Reading or writing from/to a USB flash drive
takes a long time.
The USB flash drive contains a number of files. The more files that are
contained, the longer time is required.
Delete files the PX amplifier does not need.
Symptom Possible causes Possible solution