Protective Circuits - Warwick WA300 Owner's Manual

15. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. The apparatus
shall not be exposed to dripping or splashing and that objects filled with liquids, such as vases, shall not be placed
on apparatus
16. Never set the amplifier on a support that might give out under its weight.
17. WARNING: The mains plug used as disconnect device, the disconnect device shall remain readily operable.
18. Protective earthing terminal. The apparatus should be connected to a mains socket outlet with a protective
earthing connection.
19. Replace fuse with rated value, never bridge defective fuses. Before changing fuse disconnect power cable from unit!
20. Correct Disposal of this product. This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the environment or human health from
uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. To return
your used device, please use the return and collection systems or contact the retailer where the product was
purchased. They can take this product for environmental safe recycling.
PRODUCT SHOULD BE SERVICED BY QUALIFIED PERSONNEL WHEN:
1. Unit has been dropped or the enclosure damage.
2. Mains switch has been damaged.
3. Objects or liquids have penetrated the unit.
4. Unit does not operate normally and troubleshooting (last chapter of this manual) does not help.

PROTECTIVE CIRCUITS

Your new Warwick amplifier is equipped with a series of circuits to prevent it from destruction in case of inadequate
operating conditions:
POWER-UP DELAY: When the unit is switched on, the SPEAKER OUT sockets are activated with a slight delay to protect
the loudspeakers.
SHORT-CIRCUIT: This feature prevents the output stage transistors from destruction by quickly reducing current in the
case of short-circuit at the power amp outputs.
DIRECT CURRENT (DC): This circuit continuously monitors the power amp output for direct current and protects the
loudspeakers from overload.
HF OSCILLATION: By switching the power amp off, this safety feature prevents from damages that could be caused by
frequencies in excess of 20 kHz (feedback, etc.).
EXCESSIVE TEMPERATURES: This circuit protects the output stage transistors from destruction by switching the device
off if the temperature-regulated fan cooler prove to be insufficient and temperature of device will be too high.
NOTE: You can recognize that one of these circuits has been activated as a result of a fault, when the MUTE
LED glows continuously even though you have not selected the MUTE mode. In case of short-circuit please
check the speaker cable. The amplifier must then be switched off and on again to get back into playing mode
after having removed short-circuits. In any other situation the amplifier switches automatically back to playing
mode as soon as it detects the fault has disappeared (e.g. the amplifier has overheated and cooled down again).
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