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1.  After turning on the 'power'  switch the 'power' indicator does not light- 
     The mains plug is not pushed far enough into the amplifier - There is not supply   
     at the mains socket.  Check using an alternative electrical appliance. 
 
    The mains fuse is broken, located on the rear of the amplifier, replace using 12.5A   
    20mm fuse. 

 

         
2.  When volume controls are advanced no sound is heard- 
      Wait 10 seconds, amplifier may not be stabilised after switch on. 
      No input signal connected to input socket. 
      No speakers connected to output sockets. 
      Mono input signal not connected to correct channel.  Either move input plug to  
      other channel, or select 'mono mode'. 
         
 
3.  Even when the output is low, the output sounds distorted- 
     The speaker leads are shorted, either due to faulty connection of plug or  
     damaged cables. 
 
4.  Output distorted at medium volume setting- 
 
      Amplifier is running too hot, ensure free flow of 

cool 

air, into and out of the   

      unit.(see section a. of  Siting the power amplifier) 
 
5.  'Trip' indicator is lit and no sound is heard- 
 
     Unit has overheated.  Ensure free air flow into and out of the unit. The amplifier will    
     reset itself when cool.  Or the amplifier  has developed an internal fault, please   
     consult your dealer. 
     

As a general rule jack plugs and sockets are very reliable especially if they are regularly 
connected and disconnected. In situations where they are subject to prolonged static 
use - it is good practice to clean the plugs and to clean the sockets by  taking a new plug 
and waggling it in & out.  this will stop any build up of  any corrosion.   

     
 

7. 

 

GUARANTEE 

 

YOUR EQUIPMENT IS GUARANTEED FOR A PERIOD OF TWELVE MONTHS TAKEN FROM THE 
DATE OF PURCHASE OF THE PRODUCT AGAINST ANY DEFECTS DUE TO FAULTY MATERIALS 
OR FAULTY MANUFACTURING.  DURING THIS PERIOD, REPAIRS TO THE EQUIPMENT WILL BE 
CARRIED OUT WITHOUT CHARGE FOR LABOUR OR MATERIALS BY ANY AUTHORISED DEALER 
OR THE FACTORY SUBJECT TO THE FOLLOWING CONDITIONS.   

 
1.  The fault must be entirely due to faulty materials or faulty manufacture. 
 
2.  The defect must not have been caused by bad installation, accidental damage, misuse     
     or failure to comply with the instructions given in this users manual. 
 
3.  The equipment must be used solely for audio applications and is subject to fair wear and 
     tear, for commercial usage. 
 

Содержание QPX1200

Страница 1: ...DUAL CHANNEL AUDIO POWER AMPLIFIER OWNERS MANUAL Hz INTERNATIONAL LTD COMBE HOUSE STOKE ST MICHAEL BATH SOMERSET ENGLAND QPX1200 CE 96 ...

Страница 2: ...cking 2 Siting the power amplifier 3 Connections 4 Fitting a mains plug OPERATION 1 POWERING UP 2 SELECTING MODE 3 PEAK INDICATOR 5 TRIP INDICATOR AMPLIFIER MAINTENANCE TECHNICAL DATA FAULTS AND THEIR LIKELY CAUSES 1 INSTALLATION ...

Страница 3: ...r ventilation and the air is not recycling b Rack mounting Ears are provided for both front and rear support a choice of mounting position is given on the front brackets either proud level with the front panel or sunk by 20mm and flush with the front escutcheon c Care is required when installing these units in a rack It is advised to put the Rack on its back then place all the equipment being fitt...

Страница 4: ... CABLES The inputs are electronically balanced for those who require this facility with the tip of the jack being hot and the ring cold or balanced line and the sleeve ground However they can be used unbalanced with standard mono jack plug A link jack input is provided on each input channel so that any of the four channels can be joined together or linked down to another power amplifier in the rac...

Страница 5: ... down the volume controls during switch on as precaution against speaker damage Which can be caused by instant high level feedback from an open channel mixer mic or system instability On initial switch on the trip indicator will light this should go out after a few seconds when the amplifier supplies have stabilised It is not recommended to switch the amplifier on and off rapidly several times ove...

Страница 6: ...ier enclosed in a sealed rack with no air vents If the trip light fails to extinguish after 30 seconds from cold switch on then there is an internal fault in the amplifier and the relevent speaker s have been disconnected to protect them Advice should be sought from your dealer AMPLIFIER MAINTENANCE The amplifier contains no use serviceable parts inside Maintenance should be mainly preventative ta...

Страница 7: ...o reset COOLING 2 fans speed change switched on at 50 deg C INPUTS 1 IEC Mains socket for A C input 8 stereo input link jacks balanced line 2 per ch OUTPUTS 4 XLR male sockets 1 per channel MAINS FUSE 12 5A HRC 20mm POWER FUSES 4 x 10A 20mm internal SIZE 483 X 90 X 290 19 x 3 5 x 11 WEIGHT 17Kg 38lbs MAINS SUPPLY 240 220v or 120 110v A C 50 60 Hz 1 4KVA full power 6 FAULTS AND THEIR LIKELY CAUSES ...

Страница 8: ...nsure free air flow into and out of the unit The amplifier will reset itself when cool Or the amplifier has developed an internal fault please consult your dealer As a general rule jack plugs and sockets are very reliable especially if they are regularly connected and disconnected In situations where they are subject to prolonged static use it is good practice to clean the plugs and to clean the s...

Страница 9: ...at has been replaced shall become the property of the company and the right is reserved by the company to replace the equipment or repair it at the option of the company 8 This guarantee applies to equipment purchased and used within the E E C The importers of equipment in non E E C countries are responsible for the guarantee of this equipment Parts required under guarantee are free Shipping charg...

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