Bedienungsanleitung Marantz MM7025 (Seite 16 von 20) (Englisch)

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ENGLISH

Explanation of terms

Protection circuit

This is a function to prevent damage to components within the power

supply when an abnormality such as an overload or excess voltage

occurs for any reason.

In this unit, the STANDBY indicator and protection indicator blinks and

the unit enters standby mode when an abnormality occurs.

Speaker impedance

This is certain-rated resistance of the speaker set to an alternating

current and expressed in ohms.

The smaller the impedance, the greater the output.

However, load on the ampliﬁ er is increased. Use speakers whose

impedance is supported by this unit.

Troubleshooting

If a problem should arise, ﬁ rst check the following:

1. Are the connections correct?

2. Is the set being operated as described in the user guide?

3. Are the other components operating properly?

If this unit does not operate properly, check the items listed in the table below. Should the problem persist, there may be a malfunction.

In this case, disconnect the power immediately and contact your store of purchase.

Symptom Cause/Solution Page

The power does not switch on.

Or, the power switches off immediately after

being switched on.

• Check that the power plug is inserted correctly in the wall socket.

• The protective circuit has operated. In this case, remove the power plug

from the wall socket, and wait for at least 1 minute before inserting it in the

wall socket again.

7, 10

There is no sound from the speakers. • Check the speaker connections and connections to the other devices.

• Alter the input selector to match the input connector (BALANCED or

UNBALANCED) of the connected device.

The power suddenly switches off during use,

and the STANDBY indicator and protection

indicator ﬂ ash at approximately 0.5 second

intervals.

• The internal temperature of the unit has increased, causing the protective

circuit to operate. Remove the power plug from the wall socket, wait until

the temperature of the unit has dropped adequately, and then insert the

power plug back into the wall socket.

• Install this unit in a well-ventilated location.

• Use speakers that have the speciﬁ ed impedance.

• If the two core wires of the speaker cables are touching, or if a core wire

is out of the terminal causing the core wire to touch the rear panel of this

unit, the protective circuit will operate. Remove the power plug from the

wall socket, and ﬁ rmly re-insert the core wire, or ﬁ x the terminal before

reconnecting it.

• Turn the volume down on the amp connected to this unit, and insert the

power plug again.

–

4, 10

–

When the power switches off suddenly

during use, the STANDBY indicator ﬂ ash

at approximately 0.1 second intervals and

protection indicator ﬂ ash at approximately 0.5

second intervals.

• The protective circuit has operated. In this case, remove the power plug

from the wall socket, re-examine the installation conditions of this unit, and

check the speaker cable connections. If the same situation occurs when the

power is switched on again, contact the Marantz Service Center.

6, 7, 10

MM7055_7025N_ENG_5th_0729.indd 10MM7055_7025N_ENG_5th_0729.indd 10 2010/07/29 21:49:422010/07/29 21:49:42

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