Esoteric A-02 owner manual Troubleshooting, Protection Circuit, No power, Sound is unstable

Troubleshooting

If you experience any problems with the unit, please take a moment to look through this chart and see if you can solve the problem yourself before you call your dealer or ESOTERIC customer service/ technical support.

Moreover, the problem might be caused by something other than this unit. Confirm that connected devices are also being used properly.

No power.

e Check the connection to the AC power source. Check and make sure the AC source is not a switched outlet and if it is, the switch is turned on. Make sure there is power to the AC outlet by plugging another item such as a lamp or a fan.

There is no sound or only a very low-level sound is heard. e Press the POWER button to turn the unit on.

e Check the operation of the preamplifier. When turning on the preamplifier, turn off the A-02 first.

e Check that the speakers, preamplifier and components are connected properly.

e Set the input and output setting of the preamplifier properly. e Check the connections of the preamplifier. Make sure that the

audio signal is output correctly.

e Check if the INPUT SELECTOR switch is set properly. e Adjust the preamplifier volume.

Indicator around the POWER button continues to blink blue. e The protection circuit is activated. There may be a ¥/^ short in

a speaker cable. Turn the unit off, and then check the cables.

Indicator around the POWER button continues to blink blue and purple.

e The protection circuit is activated. The temperature inside the unit may be too hot. Turn the unit off, and wait to let it cool down.

Sound is unstable.

e Check the polarity (¥/^) of the speaker cable. It may be reversed.

Since this device uses a microcontroller, external noise and other interference can cause the unit to malfunction. If this occurs, turn the power off and restart operations after waiting for about one minute.

Protection Circuit

This unit has a built-in protection circuit. This protection circuit consists of an output short-circuit protection circuit, an overcurrent protection circuit and a direct current protection circuit.

When the indicator around the POWER button continues to blink blue, there may be a ¥/^ short in a speaker cable. Turn the unit off, and then check the cables.

When the indicator around the POWER button continues to blink blue and purple, the temperature inside the unit may be too hot. Turn the unit off, and wait to let it cool down.

If the protection circuit continues to be activated, please contact your dealer or an authorized ESOTERIC service center.

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