Troubleshooting - NORAUTO SOUND NS-412 BT MFI Manual

What appears to be trouble is not always serious. Please check the following points before calling
a service center.
Problem
Unit fuse blown.
Unit can not power on Car battery fuse blown.
Illegal operation
Battery depleted.
Remote control does not work
Battery installed incorrectly.
Improper audio output connection.
Volume set too low.
No/low audio output Speakers damaged.
Heavily biased volume balance.
Speaker wiring is in contact with metal part of car.
Piratic disc is in use.
Speaker power rating does not match unit.
Poor sound quality or
distortion
Wrong connections.
Speaker is shorted.
Unit resets itself when engine
Incorrect connection between ACC and BATT.
is off
Warning information is shown
Parking break wiring is not correct.
at all times
The color system of DVD disc does not match the
monitor.
Piratic disc is in use.
Flashing image or interference
appears on screen
Video cable damaged.
Improper video signal connections.
Cannot insert disc A disc inside the unit already.
Disc is warped or scratched.
Disc is dirty or wet.
Disc does not play back Incompatible disc is used.
Disc is inserted upside down.
Disc region code is not compatible with unit.
PBC cannot be used during
PBC is not available on the disc.
VCD playback
Repeat or search function is
PBC is on.
invalid during VCD playback
Disc is dirty.
Disc is upside down.
No disc
No disc inside.
Disc is dirty.
Bad disc
Disc is upside down.
Unknown disc Disc format is not compatible with this unit.
DVD region code is not compatible with
Region Error
this unit.

Troubleshooting

Cause
General
TFT monitor
Disc playback
Error messages
174
Corrective action
Install new fuse with correct rating.
Install new fuse with correct rating.
Reset the unit.
Change the battery.
Install the battery correctly.
Check wiring and correct.
Increase volume level.
Replace speakers.
Adjust the channel balance to center position.
Insulate all speaker wiring connections.
Use original disc.
Replace speakers.
Check wiring and correct.
Check wiring and correct.
Check wiring and correct.
Check wiring and correct.
Adjust the color system of the DVD disc
playing back or the monitor in use.
Use original disc.
Replace cables.
Check wiring and correct.
Eject current disc and insert new one.
Use disc in good condition.
Clean disc with soft cloth.
Use compatible disc.
Insert disc with label side up.
Use disc with proper region code.
Use disc with PBC available.
Turn PBC off.
Clean disc with soft cloth.
Insert disc with label side up.
Insert disc.
Clean disc with soft cloth.
Insert disc with label side up.
Use disc with compatible format.
Use disc with compatible region code.