Rockford Fosgate 250.1 manual Symptom, Diagnosis, Remedy, Speaker Output Low, or Distorted

Page 45
Speaker Output Low

 

Symptom

Diagnosis

Remedy

 

 

 

 

O

 

 

 

 

 

 

TROUBLE-S

 

 

 

 

 

 

 

 

 

H

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

T

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

Speaker Output Low

Input gain(s) for amplifier incorrectly

Readjust input gains of amplifier.

 

 

 

 

N

 

 

 

 

 

G

 

or Distorted

set.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Source unit output too low or source

Check system with known working

 

 

 

 

 

unit has no output.

source and repair or replace original

 

 

 

 

 

 

source as needed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Phase selection of amplifier incorrectly

Check speaker polarity and phase switch

 

 

 

 

 

selected or speakers wired out of polar-

position and correct as needed.

 

 

 

 

 

 

 

 

ity from the left to right channel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XCards are missing or not placed prop-

Check crossover switches and XCard

 

 

 

 

 

erly in crossover slots and/or switches

positions and repair or replace as nec-

 

 

 

 

 

are not properly selected.

essary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low battery voltage or large voltage

Check the alternator, battery, fuse or

 

 

 

 

 

drops to the amplifier under load.

circuit breaker and power and ground

 

 

 

 

 

 

wiring and repair as necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amplifier Noise

Voltage spike from output of preceding

Disconnect input signal to amplifier

 

 

 

(Turn-on Pop)

component is entering amplifier

and turn amplifier on and off. If noise is

 

 

 

 

 

through input signal.

eliminated, connect REM lead of am-

 

 

 

 

 

 

plifier to source unit with a delay turn-

 

 

 

 

 

 

on module.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage spike from remote turn-on lead

Use different 12 volt source for REM

 

 

 

 

 

is entering through REM input termi-

lead of amplifier (i.e., battery direct). If

 

 

 

 

 

nal.

noise is eliminated, use relay to isolate

 

 

 

 

 

 

amplifier from noise turn-on output.

 

 

 

 

 

 

 

 

 

 

 

No output from Pass-Thru

RCA Input from source unit is not con-

Check connections, substitute

with

 

 

 

output of amplifier.

nected or not functioning properly.

known working source and cables and

 

 

 

 

 

 

repair or replace as necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When using the BLT, Balanced Line

Check connections, substitute

with

 

 

 

 

 

Input from BLT is not connected or not

known working BLT and cables and

 

 

 

 

 

functioning properly.

repair or replace as necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unbalanced/Balanced Line switch is

Check switch position and correct as

 

 

 

 

 

not selected for corresponding input.

necessary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XCards are missing or not placed prop-

Check crossover switches and XCard

 

 

 

 

 

erly in crossover slots.

positions and repair or replace as nec-

 

 

 

 

 

 

essary.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– 42 –

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Page 44 Page 46
Contents power powerpower 250.1PRACTICE SAFE SOUND G E T T I N G S T A R T E D TA B L E O F CO N T E N T SPunch Power INTRODUCTION TO 250 SERIESPunch Power DIABLO Dynamically Invariant A-BLinear Operation TECHNICAL DESIGN FEATURESTOPAZ Tracking Operation Pre-AmplifierZone trans nova circuitryStereo Pass-Thru DSM Discrete Surface Mount TechnologyXCard Internal Crossover Balanced Line Inputs NOMAD NOn-MultiplyingAdvanced DecisionITS Increased Thermal Stability 250.2 DE S I G N FE AT U R E S PLIFIER 250.1 DE S I G N FE AT U R E S 1AMPLIFIER Tools Needed INSTALLATION CONSIDERATIONSTrunk Mounting BATTERY AND CHARGINGPassenger Compartment Mounting Engine Compartment MountingW I R I N G T H E S Y S T E M USING PASSIVE CROSSOVERS 6 dB/Octave High-Pass TABLE OF CROSSOVER COMPONENT VALUES6 dB/Octave Low-Pass FreqCU S T O M I Z I N G T H E XCA R D US I N G T H E XCARDHigh-Pass Low-PassButterworth Alignment Q = XCA R D RESISTOR CHART1% resistors used with 0.047∝ F capacitors Butterworth Alignment Q =250.2 INSTALLATION 250.2 Power Connections Option #1250.2 Power Connections Option #2 Stereo/Mono Operation Stereo OperationLeft Phase Switch set to Right Phase Switch set toEZ-BridgedOperation Bridged OperationLeft Phase Switch set to Right Phase Switch set toPage XCard not required Pass-Thru uses output from XCard 250.2 uses output from XCardPage Configurea24dBperoctave and“AudiophileBypass”the Configurea12dBperfilterfor Pass-ThruConnecting the BLT USING THE 250.2 BALANCED LINE INPUTS8.0 VAC Level Setting the BLTPerformance Characteristics Disconnect Speakers from the250.1 INSTALLATION 250.1 Power Connections Option #1250.1 Power Connections Option #2 Mono Operation Phase Switch set tominimum orFullRange AmplifiersPowerStereo/Mono Operation Impedanceforeachstereochannelshouldbe2Ω minimumImpedanceforbridgedchannelshouldbe4Ω minimum minimum Bridged Mono OperationImpedanceforbridgedchannelshouldbe4Ω Pass,-High -LoworPass RangeFullU S I N G T H E 250.1 SIGNAL S W I T C H I N G N E T W O R K“Audiophile Bypass” the XCard Configure a 12dB per octave filter for theLOUD TUNEConfigure a 24dB per octave filter for the SY S T E M DI A G R A M S 250 Watt System rated @ 4 ohmsTotal Power Delivery RMS Total Power Delivery RMS 500 Watt System rated @ 4 ohmsTotal Power Delivery RMS 750 Watt System rated @ 4 ohmsTweeters 450 WattsTotal Power Delivery RMS 1000 Watt System rated @ 4 ohmsTweeters WattsROCKFORD FOSGATE ACCESSORIES NOISEBalanced Line Transmitter FG-BLT Punch Status Display connected to one Punch Status Display FG-PSDChannel A monitors left channel Channel B monitors right channelEnergy Storage Capacitors punchXCard Crossovers 1.0capTR O U B L E S H O O T I N G SymptomDiagnosis RemedyDiagnosis SymptomRemedy Speaker Output LowDiagnosis SymptomRemedy Low or distorted output fromAUTOSOUND 2000s QUICK CHECK FOR TROUBLESHOOTING CAR AUDIO SYSTEMSPreface Noise OverviewSummation Time for ProcessorsAbout the Dynamic Power Measurements DY N A M I C PO W E R ME A S U R E M E N T SWhat is an Amplifier? MusicSpecifications subject to change without notice 250.2 SP E C I F I C AT I O N S180Watts 310Watts 620Watts 125Watts 225Watts 450 WattsSpecifications subject to change without notice 250.1 SP E C I F I C AT I O N S420Watts 710Watts 1420 Watts 250Watts 500 Watts 1000 WattsLength of Warranty LIMITED WA R R A N T Y IN F O R M AT I O NWhat is Covered What is Not CoveredN F O R M A T I O N UBICACIÓN DE LOS AMPLIFICADORES INTRODUCCIÓNMaletero HabitáculoOperación mono/estéreo INTRODUCTION InstallationMONTAGE Montage dans le coffrePage EINBAUORT EINLEITUNGDEUTSCH Im FahrzeugkofferraumStereo/Mono Betrieb Linken Phasen Schalter auf 0 stellenINTRODUZIONE InstallazioneDOVE POSIZIONARLO ITALIANOFase sinistra dellinterruttore posizionata su Stereo/Mono OperationMADE IN THE USA
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