Dual MXR42 Car Stereo System User Manual


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9
Troubleshooting
MXR42 OPERATION
Specifications 
Tuningrange:87.5MHz-107.9MHz
Usablesensitivity:10dBf
50dBquietingsensitivity:25dBu
Stereoseparation@1kHz:40dB
Frequencyresponse:30Hz-18kHz
Tuningrange:530kHz-1710kHz
Usablesensitivity:35dBu
Frequencyresponse:80Hz-2kHz
Speakeroutputimpedance:4~8ohms
Lineoutputvoltage:1.5VoltsRMS
Fuse:5ampAGC
Dimensions:7"x2"x4.2"(178x50x107mm)
Designandspecificationssubjecttochangewithoutnotice.
FMTuner
AMTuner
General
CEA-2006 Power Standard Specifications
(reference:14.4VDC+/-0.2V,20Hz~20kHz)
PowerOutput:5WattsRMSx4channelsat4ohmsand<1%THD+N
Signaltonoiseratio:60dBA(reference:1wattinto4ohms)
Problem Cause Action
Unit will not turn on 
(no power)
Yellowwirenotconnectedorincorrectvoltage
Redwirenotconnectedorincorrectvoltage
Checkconnectionsforproper
voltage(11~16VDC)
Blackwirenotconnected Checkconnectiontoground
Fuse blown Replace fuse
Unit has power 
(but no sound)
Speakerwiresnotconnected Checkconnectionsatspeakers
Oneormorespeakerwirestouchingeach
otherortouchingchassisground
Insulateallbarespeakerwiresfrom
eachotherandchassisground
Unit blows fuses
Yelloworredwiretouchingchassisground Checkforpinchedwire
Speakerwirestouchingchassisground Checkforpinchedwire
Incorrectfuserating Usefusewithcorrectrating
"ER" appears 
on display
USB or SD card compatibility issue
Device capacity must be less than
16GB.
File system is incompatible - it must
beFATorFAT32.
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