4. HANDLING PRECAUTIONS
[VM-2120/VM-2240 and RM-200M/RM-210]
To clean, be sure to first switch off the power supply to the unit, then wipe with a dry cloth. When the unit gets very dirty, use a cloth damped in a neutral cleanser. Never use benzene, thinner or
[VM-2120/VM-2240]
•When the
•Avoid inserting or withdrawing the CompactFlash card while the unit is alive.
5. INSTALLATION PRECAUTIONS
•Do not install the unit in locations exposed to the direct sunlight or heaters, as the unit could be deformed or discolored.
•Avoid installing or storing the unit in dusty or humid locations, as doing otherwise could cause the unit's failure.
•Keep the unit as far away as possible from a fluorescent lamp, digital equipment, PC or other equipment which generate high frequency noise.
•Do not block the ventilation slots on the upper, right and left, and rear sides to allow inside heat radiation.
•Keep at least 50 mm space from the unit's right and left sides for heat radiation.
Amplifier
At least 50 mm
At least 50 mm
•Never connect the AC power cord to any other line voltage than that specifically designated.
•To avoid oscillation, keep the input cable away from the output cable. Particular care must be exercised when mounting the unit in an equipment rack.
•In some installations, a ground loop is formed and hum noise may be generated. In such cases, connecting the
•Never connect two amplifier outputs in parallel under any circumstances.
Caution
•When such work as mounting optional boards or setting switches needs to open the amplifier's top cover, leave it to a qualified service technician.
•In the case above, be sure to switch the power off before the work.
•A warning that TERMINALS marked with the symbol 
are HAZARDOUS LIVE and that the external wiring connected to these TERMINALS requires installation by an INSTRUCTED PERSON or the use of
7
