Troubleshooting; General; Usb - Hertz marine HMR 20 Owner's Manual

11. TROUBLESHOOTING

11.1

General

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
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.
Owner's Manual
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
21