DPA250
OPERATION
Troubleshooting
Problem
Cause
Action
Unit will not turn on
(no power LED indicator)
6WIRENOTCONNECTEDORINCORRECTVOLTAGE
2%-WIRENOTCONNECTEDORINCORRECTVOLTAGE
#HECKCONNECTIONSFORPROPERVOLTAGE
^6$#
'.$WIRENOTCONNECTED
#HECKCONNECTIONTOGROUND
&USES BLOWN
2EPLACEFUSES
Unit has power - power
LED is green
(but no sound)
3PEAKERWIRESNOTCONNECTED
#HECKCONNECTIONSATSPEAKERS
6OLUMETURNEDALLTHEWAYDOWN
)NCREASEVOLUMELEVELATHEADUNIT
/NEORMORESPEAKERWIRESTOUCHINGEACH
other or touching chassis ground
)NSULATEALLBARESPEAKERWIRESFROMEACH
other and chassis ground
3PEAKERS DEFECTIVEORDAMAGED
#HECKREPLACESPEAKERS
)NPUTSIGNALNOTCONNECTED
#HECKLOWLEVELINPUTSFORPROPER
connection
Unit blows fuse(s)
)NCORRECTFUSERATING
5SEFUSES WITHCORRECTRATING
6WIRETOUCHINGCHASSISGROUND
#HECKFORPINCHEDWIRE
3PEAKERS DEFECTIVEORDAMAGED
#HECKREPLACESPEAKERS
Engine noise
"ADGROUNDCONNECTION
-AKESUREAMPLIFIERGROUNDWIREIS
connected to clean bare metal
3IGNALGROUNDLOOPOR2&)RADIOFREQUENCY
INTERFERENCE
2EROUTE2#!CABLESFROMEXISTINGHIGH
CURRENTWIRING
Protect LED illuminates
red
(protect mode)
/NEORMORESPEAKERWIRESTOUCHINGEACH
other or touching chassis ground
)NSULATEALLBARESPEAKERWIRESFROMEACH
other and chassis ground
3PEAKERS DEFECTIVEOR
DAMAGEDINTERNALLYSHORTED
#HECKREPLACESPEAKERS
3PEAKERLOADLESSTHANOHMSSTEREO
3PEAKERLOADLESSTHANOHMSBRIDGED
!DJUSTSPEAKERLOADAMPLIFIERWILLNOT
OPERATEATLESSTHANOHMSWHENBRIDGED
Distorted audio output
)NCORRECTINPUTSIGNALTYPEOR
INPUTLEVELTOOHIGH
#HECKCONNECTIONSANDREDUCEADJUSTINPUT
LEVEL
Low audio output
)NCORRECTINPUTSIGNALTYPEOR
INPUTLEVELTOOLOW
#HECKCONNECTIONSANDINCREASEADJUST
INPUTLEVEL
Weak bass
3PEAKERS AREWIREDOUTOFPHASE
#HECK AND SPEAKERCONNECTIONS
/BSERVECORRECTPOLARITY
