Chevin Research A2000 - Operation and Servicing; Protection Systems Overview; Servicing and Safety Precautions

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Operation & Servicing
Switching on
1 Turn the gain controls to the minimum positions.
2 Connect the unit to a mains supply of sufcient power and click the front panel switch(es)
to the ON position. Depending on the internal temperature, the fans may run.
• The green Power indicators will illuminate.
• The red Clip indicators will illuminate if overdriving is imminent.
WARNING: Keep sound levels down. High levels of sound can damage hearing.
Switching off
• Turn the gain control(s) to the minimum position(s). Click the front panel switch(es) to the
OFF position and disconnect from the mains supply.
WARNING: High voltages are present at output terminals for a period after switching off.
Protection systems
• Mains power supply failure: When power is restored, the amp will AutoMute for ve seconds.
Do not increase gain settings during this period. Note: A500, A700v, Line250 and Line500
do not AutoMute.
• Shorted output: The unit can operate indenitely into a shorted output. Normal operation
will resume upon removal of the short circuit.
• Low load impedance: Protection is immediate.
• Clipping: The affected channel’s red Clip indicator will illuminate shortly before clipping.
A further increase in signal level will activate the SoftClip circuit.
• RF, DC or very low frequency signal at output: A self resetting circuit will activate to
protect the load.
• Cooling systems: The internal fans react to both high signal level and temperature inside
the unit. If the ambient temperature is high, fan speed will increase even in the absence of
a signal.
Servicing
WARNING: All servicing and internal maintenance must be referred to an authorised Chevin
dealer. Chevin Research accepts no responsibility or liability relating to injury or damages
suffered as a result of misuse or unauthorised tampering with ampliers.
• Do not remove any covers or touch any internal parts. Do not allow any objects (e.g.
screwdrivers, cable ends, etc.) to enter the unit.
• If the unit of any other electrical equipment in the system becomes wet during operation,
disconnect the power source immediately. Do not touch the amplier. Consult a qualied
engineer.
• If there are any signs of mechanical damage, disconnect the power source and consult a
qualied engineer.