DA 1002 (serv.man9) - JBL Car Audio User Guide / Operation Manual. Page 7

7

No audio

Low/no remote on voltage

Check connections; 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: 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

flashes

(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) flashes

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 symp-
toms and solve problems. Make sure the
vehicle’s electrical system is working pro-
perly and power is reaching the amplifie-
r’s power connector.

EN 55 013/A12/8. 1994

EN 55 020/12. 1994

Steen Michaelsen

Birkerød, DENMARK 07/98

 35633_Decade DA 4002, Eng  04/11/98  11:02  Side 7