Maintenance; Applicable Ranges; Replacing A Fuse; Troubleshooting And Maintenance - DAD PX Series User Manual

Maintenance

1 Application range
1.1 This user manual is suitable only for DAD manufactured PX Series products.
1.2 PX amplifiers are suitable for live performances, band performances, discos, night clubs, etc...
2 Use circumstances
2.1 The room temperature shall be kept around 25 degree while used indoor. It can't be used in
high temperature environments as over heating may cause damages to components.
2.2 If used outdoor, direct exposition to rain or sunshine must be avoided as it would shorten the
equipment's life.
2.3 operation range
A. Environment temperature: -10°C~40°C
B. Relative humidity: Less than 90%
C. Air pressure: 80kPa~106kPa
3

Replacing a fuse

3.1 If the equipment appears affected by a low-grade malfunction and the fuse burns up, after having solved
the problem, replace it with another one of the same type. If the equipment appears affected by severe
damages and causes the fuse to explode, DO NOT replace it, or more severe damages might occur.
In this case, please return the equipment to your dealer for an effective repair.
4 Maintenance and troubleshooting:
Here you are some simple tips to check wether the equipment is damaged or not.
4.1 No output
If the signal LED lights up, then the amplifier should be ok, so , check whether the output
connection is well connected or not.
4.2 Low signal output
If the signal LED lights up and clip LED too, then check whether the output is short-circuited or not.
If the signal LED lights up and the protect LED too, then the amplifier should be in the protection status.
There are two possibilities: the former is that maybe the protection from overheating is active, the
latter is that maybe the VHF protection is active (PX3600+/PX5000+only).
If you take the signal off, then you can test whether it is the VHF protection or not.
If the amplifier case temperature is very hot, it probably should be the overheat protection.
4.3 If after the above mentioned check-up, the problem is still not solved, please return the equipment
to a qualified service centre.
5 Ordinary maintenance
Users must clear the amplifiers regularly, about one time each month. The best way is to use an high pressure
air pump (about 0.8-1.0CBM) and blow air through the air entrance on the front panel or through air exit on
rear panel. Please note that you must never turn the amplifier upside down.
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