DA 4002 (serv.man3) - JBL Car Audio User Guide / Operation Manual. Page 7

7

No audio

Low/no remote on voltage

Check connections; turn-test turn-on voltage

Speakers are not connected 

Check wiring; use VOM/DVM to measure speaker coil 

or are blown

resistance

Distorted audio

Input sensitivity is not set properly

See Setting Input Sensitivity on page 5

Audio lacks “punch”

Speakers are wired with 

Check polarity of connections; refer to Applications

wrong polarity

Audio cycles off and on;

A protection circuit is turning 

Verify the following: off electrical system is between

amber protection LED

amplifier off and on

5 ~ 18 Vdc; temperature is not over 194°F (90°C); 

(JBL badge on top panel)

no short circuits; speaker loads are not less than 2 ohms 

is not lit

(4 ohms in mono)

Audio cycles off and on;

GAIN is set too high

Set Input Sensitivity correctly (see page 5)

amber protection LED
(JBL badge on top panel) is not lit

Fuse blows

Incorrect wiring or

Check connections; refer to Applications

short circuit

Declaration of Conformity

Kongevejen 194B 
DK-3460 Birkerød
DENMARK

declare in own responsibility, that the products  

  described

in this owner’s manual are in compliance with technical

 

standard:

EN 55 020/6.1988

Steen Michaelsen

Birkerød. DENMARK. 3/98

Use the following guide to identify
symptoms and solve problems. Make
sure the vehicle’s electrical system is
working properly and power is reaching
the amplifier’s power connector.

DA OM  7/14/98 11:38 AM  Page 7