BASSPRO II (serv.man10) - JBL Car Audio Service Manual (repair manual). Page 7

POWER LED is not lit. 

1. Fuse is blown and needs 
replacement.
2. Head unit not functioning properly. 
3. Check remote turn-on, power and 
ground connections.  

POWER LED is lit but there is no bass. 

1. Inputs are not connected. Check 
connections.
2. Head-unit fader controls are not set 
properly. Adjust head-unit controls to 
feed audio signals to BassPro II.  
3. Incorrect GAIN control setting.

Output sounds muddy or distorted. 

1. GAIN is set too high. 
2. Bass level is set too high on 
head unit.
3. Head unit output is distorted or 
blown. See your authorized JBL car 
audio dealer.  

Output gets louder when the head-unit 

Using speaker-level connection: one of 

balance is adjusted to L or R. 

the speaker connections is reversed 
(+/–). Reverse one channel.   

POWER LED remains ON after system 

Speaker-level connections have a five-

is turned off.  

minute turn-off delay. Check the unit at 
a later time.  

 BassPro II

         

 

 

 

   

 

 

 

   

 

 

       

 

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