21
MXD420
OPERATION
Troubleshooting
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
Excessive skipping
Unit is not mounted correctly or
backstrap is not secure
Check mounting sleeve and
backstrap support
Physical defect in media (CD, CD-R or
CD-RW)
Check media for scratches
ERR FILE appears
on display
Disc read error
Press eject or
RESET
Focus error or disc is in upside down
Press eject or
RESET
The WMA file is copy-protected by DRM
(Digital Rights Management)
Write disc using WMA files that
are not copy-protected
NO FILE appears
on display
No playable MP3/WMA files found on
the device
Check the device for valid
MP3/WMA files
Unit will not accept
a disc
CD mechanism position out of
alignment
Press
EJECT
to reset CD
mechanism position
CD transit screws still in place
Remove 2 transit screws
located on top of the unit
NO SUPPORT appears
on display
An invalid ID3 tag version is present
Version 1.0 to 2.0 ID3 tags are
supported.
