Troubleshooting; Corrective Action - Jensen DUB 11000D Manuel D'installation

DUB Edition Amplifiers

Troubleshooting

Problem Possible Cause
No power to +12V
turn on
terminal
No power to REM
terminal
Blown main fuse at
battery
Blown se at a
Faulty ground
Volume control too
Input level control
sensitive
adjusted too high
Distorted sound
Input level control
adjusted too high
Blows fuse(s) at amp Power wires connected
backwards
Internal problem with
amp
Engine noise /
Ground loop(s)
Alternator whine
Faulty ground at amp
Faulty ground at head
unit
Inductive coupling
Input level on amp set
too high
Thermal protection
li ier driving 1 ohm
activated
load for long durations

Corrective Action

Check fuse(s)
Check head unit fuse(s) and
wiring
Replace fuse and identify
cause of failure
li ier e lace se and identi
cause of failure
Re-ground main power
ground to bare metal
chassis
Re-adjust the input level
(refer to page 8)
Re-adjust the input level
(refer to page 8)
Reconnect power wires
properly
Take unit for service
Use good quality shielded
RCA cables
Re-ground amp to clean
bare metal chassis
Re-ground head unit to
clean bare metal chassis
Re-route RCA and/or
speaker wires away from
factory harnesses
Re-adjust input level (refer
to page 8)
the a li ier ther als
frequently while driving
subwoofers, install fan to
keep amp cool.
Blown speakers
Short circuit
Speaker wire(s) shorting
protection activated
to ground
Defective crossover
Amp connected to
Low impedance
improper load
protection activated
Amp will not drive less
than a 1 ohm load
Speakers defective/
blown
Faulty passive
crossovers
Poor bass response Speakers out of phase
N O T E : I f th e yel l ow p rotection l igh t is activated w ith no s p eak ers
connected to th e am p l ifier, and al l th e p ow er connections are correct,
th is w oul d ind icate an internal p rob l em
1 0
Check all speakers
Check for faulty wiring
Faulty passive crossover
Check speaker connections
Verify that speakers are
connected properly
Check speakers
Check crossovers
hec s ea er olarit
reverse the connection to
one speaker only if two
subwoofers are connected
to the a li ier
w ith th e am p l ifier.