Troubleshooting; General; Usb - Hertz HMR 50 Owner's Manual

11. TROUBLESHOOTING

GENERAL

11.1
Problem
Unit cannot power on.
No/low audio output.
Poor sound quality or
distortion.
Unit resets itself when engine
is off.
Auto seek function can not find
any stations.
11.2

USB

Problem
USB device cannot be inserted.
USB device is not recognized
or USB SOURCE not accessible.
No sound heard with the
display showing "No File".
Sound skips or is noisy.
*16bit/44.1kHz only
26
Cause
Unit fuse blown.
Vessel battery fuse blown.
Incorrect audio output connection.
Volume set too low.
Speakers damaged.
Heavily biased volume balance.
Speaker wiring is in contact with metal
part of vessel.
Speaker power rating does not match unit. Replace speakers.
Wrong connections.
Speaker is shorted.
Incorrect connection between ACC and
Battery.
The antenna cable is not connected.
The signals are too weak.
Cause
The USB device has been inserted
incorrectly.
The USB connector is broken.
The USB device is damaged.
Connectors are loose.
No MP3 / WMA/WAV* file is stored
in the USB device.
MP3 / WMA / WAV* files are
not encoded properly.
Remedy
Replace with new fuse of correct value.
Replace with new fuse of correct value.
Check wiring and correct.
Increase volume level.
Replace speakers.
Adjust the channel balance to center
position.
Insulate all speaker wiring connections.
Check wiring and correct.
Check wiring and correct.
Check wiring and correct.
Insert the antenna cable securely.
Select a station manually.
Remedy
Reverse the connection direction of the
USB device and try again.
Replace with a new USB device.
Disconnect the USB device and reconnect.
If the device is still not recognized, try
replacing it with a different USB device.
Store these files properly in the USB
device.
Use properly encoded MP3 / WMA /
WAV* files.