User Responsibility; Mains Connection Grounding; Speaker Damage - Lab.gruppen PLM series Operation Manual

▸ Check if the affected unit complies with the EMC limits for immunity, (CE-labeled). If not, address the
problem with the manufacturer or supplier. All electrical products sold in the EC must be approved for
immunity against electromagnetic fields, high voltage flashes, and radio interference.
▸ Consult the dealer or an experienced radio/TV technician for help.
1.7

User Responsibility

1.7.1

Mains Connection Grounding

Your apparatus must be connected to a grounded socket outlet.
1.7.2 Speaker Output Hazard on Amplifiers
Amplifiers are capable of producing hazardous output voltages. To avoid electrical shock, do not touch
any exposed speaker wiring while the amplifier is operating. The external wiring connected to the speaker
terminals shall be installed by a qualified person, or ready-made leads or cords of appropriate capacity shall
be used.
As the power output channels on amplifiers produce high voltage, do not connect or disconnect
speaker cables when the mains power is on.
1.7.3

Speaker Damage

Amplifier apparatus is very powerful and can be potentially dangerous to both loudspeakers and humans
alike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always check the
speaker's continuous and peak power capabilities. Although the amplifiers attenuators can be used to
reduce the overall gain, an increase of the input signal can result in full output power, which may cause
damage to connected speakers.
1.7.4 Maintenance
For safe and reliable operation, the dust filters on both sides of the front panel, behind the grilles, should be
removed and cleaned regularly to ensure maximum airflow through the device.
If the dust filters are not maintained there will be safety risks; for example, high internal temperatures
could ignite the dust start a fire. There is also a risk that the unit will malfunction since it is dependent on
constant airflow from front to rear. If the dust filters are not clean and the unit malfunctions, any resulting
problems will not be covered by the warranty.
Important Safety Instructions
PLM Series Operation Manual rev 1.1.9
iii