B&K P/N13445 User Manual

9  

  

 

 

 

No sound (‘on’ LED 
not illuminated) 

1. Power cord not plugged in. 
2. Power off at AC source. 
3. AC power inlet fuse blown or faulty 
4. Control Input not activated. 

1. Reconnect power cord. 
2. Check AC switch or fuse 
3. Check for shorts or overloading 
4. Supply Control IN with a 5-24 Volt AC or DC 

supply (Page 8) 

 

No sound on some 
or all selected 
channels (‘on’ LED 
illuminated) 

1. Speaker leads loose or faulty 
2. Line stage to amp cables loose or 

faulty 

3. Source to line stage cables loose 

or faulty 

4. Line stage or source not correctly 

selected 

5. Speaker fuse blown 

1.  Tighten, repair or replace cable 
2.  Tighten, repair or replace cable                       
 
3. Tighten, repair or replace cable 
 
4. Check all switch settings 
 
5. Check all speaker fuses 
 

Sound lacks 
direction, bass 
weak 

1. Speakers connected out of phase 

1.  Check all connections making sure that 

cables are connected (+) to (+) and (-) to (-) 

Loud hum or buzz 
on one or more 
channels 

1. Poor ground connection in inter-

connect cables 

1. Check all connectors and repair as 

necessary 

Channel sounds 
distorted and low 
output 

1. Blown rail fuse 

1. Replace blown rail fuse inside amplifier. 

 
* *Note:

 If unit continues to blow power inlet fuses, 

please contact customer service to have the unit serviced. 

 

 
Under normal use, the amplifier will not require any special care. Over time you may wish to clean the exterior of 
the unit by wiping it with a damp cloth to remove any dirt or dust that accumulates on it. Unplug the amplifier and 
be sure that it has completely powered down before you apply any damp cloth. Do not let any liquid enter the 
amplifier through the vents in the top cover. REMEMBER, LIQUIDS CONDUCT ELECTRICITY!!! You may clean 
the connectors on the back panel with isopropyl alcohol annually.