RetroSound RetroRadio Apache User Manual page 30

FREQUENTLY ASKED QUESTIONS
I have your radio with an amp connected, but hear a
whining/buzzing sound through the speakers when I step
on the accelerator.
If you have an external amplifier installed and experience a high-
pitched noise that varies with the engine's RPM, there are many
possible solutions:
• Make sure the amplifier's gain controls are not turned all
the way up. Amplifiers amplify everything, including noise.
• Try grounding the amplifier near where it is installed.
• Try a filter on the amplifier's 12-volt power lead. Make sure
to use a filter that includes a ground wire.
• On rare occasions, noise can be introduced through the
antenna lead. If disconnecting the antenna makes the noise
go away, you need to replace or repair the antenna plug
where it goes into the radio.
When I plug in my flash drive the screen says
and it won't play the files I placed on the drive.
• Make sure the files on the drive are .mp3 or unprotected .wma
(Windows Media Audio) files. iTunes
and need to be converted to .mp3 format, which can easily
be done using iTunes
• Verify the capacity of the flash drive. Apache will only play
1 gig up to 32 gig size flash drives.
• Make sure the flash drive is not NTFS formatted. Always use the
FAT32 format (most drives are formatted with FAT32 from the
factory). Be sure to do a full format rather than a quick format,
and check that none of the files or folders have names
longer than 64 characters. It is very important that none of the
audio files have DRM. Use only MP3 files or unprotected
Windows Media format files.
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USB ERR
files are .m4a format