Marantz MA-9S2 - Manual (Page 18)

ENGLISH
14
TROUBLE SHOOTING
Should faults occur, in many cases it is not necessary to consult
your dealer or a Marantz technical service department.
On the basis of the following checks you will be able to rectify
a number of faults yourself without difficulty.
If the fault cannot be remedied after the following checks,
please consult your dealer or nearest Marantz service agent.
7
The unit does not turn ON
1. Is the power cable securely plugged into an AC outlet?
7
Sound is not coming from the
speakers
1. Has the wrong input source been selected with the INPUT
SELECTOR on the front panel?
2. Is the ATTENUATOR switch set to - ∞ on the rear panel?
3. Are speaker cables properly connected to the speaker
system?
4. Is the connection cable properly connected to the control
(pre) amplifier?
5. Is the control (pre) amplifier or input source wrongly set?
6. Are you using the player in the wrong way?
7. The protective circuit of this unit may have worked. Shut
power OFF, wait 1 minute or more, then reactivate the
power.
ABOUT THE PROTECTIVE CIRCUIT
This unit incorporates a protective circuit that protects the
amplifier circuit and speaker system against damage. If the
protective circuit works, the power indicator in the meter flashes,
and sound is muted (no sound). This protective circuit works
in the following cases.
7
At power ON
It takes approximately 8 seconds for the amplifier circuit to
stabilize after the power is turned on, during which time the
protective circuit works and sound is muted (no sound). Also
during this time, the power indicator in the meter flashes.
Once the amplifier circuit has stabilized, the protective circuit
is released, and sound can be heard.
7
If overcurrent flows to the amplifier
circuit (Overcurrent protection)
If overcurrent flows to the amplifier circuit because of excessive
signal input or if the unit is used with speakers of less than 4
Ω
impedance connected to it, overcurrent is detected and the
protective circuit engage. The protective circuit also works if
the speaker cables are accidentally shorted.
The power indicator in the meter flashes when the protective
circuit works, so check the power indicator.
If it has worked, shut power OFF, wait 1 minute or more, then
reactivate the power.
The section describes the care and maintenance tasks that
must be performed to optimize the operation of your Marantz
equipment.
7
Cleaning of equipment external
surfaces
The exterior finish of your unit will last indefinitely with proper
care and cleaning, Never use scouring pads, steel wool,
scouring powders or harsh chemical agents (e.g., lye solution),
alcohol, thinner, benzine, insecticide or other volatile
substances as these will mar the finish of the equipment.
Likewise, never use cloths containing chemical substances. If
the equipment get dirty, wipe the external surfaces with a soft,
lint-free cloth.
If the equipment becomes heavily soiled:
• dilute some washing up liquid in water, in a ratio of one
part detergent to six parts water.
• dip a soft, lint free in the solution and wring the it is damp.
• wipe the equipment with the damp cloth.
MAINTENANCE
• dry the equipment by wiping it with a dry cloth.
7
Repairs
Only the most competent and qualified service technicians
should be allowed to service the factory-trained warranty station
personnel have the knowledge and special facilities needed
for repair and calibration of this precision equipment. After the
warranty period has expired, repairs will be performed for a
charge if the equipment can be returned to normal operation.
In the event of difficulty, refer to your dealer or write directly to
the nearest location to you that is listed on the Marantz
Authorized Service Station list. If writing, please include the
model and serial number of the equipment together with a full
description of what you think is abnormal about the equipment's
behaviour.
7
If the amplifier overheats
In the following cases, the amplifier will overheat and the
protective circuit will work .
• If the unit is used with the ventilation blocked or obstructed
• If speakers of less than 4 Ω impedance are used
• If the unit is used for an extended period of time under
excessive signal input.
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