Navigation Troubleshooting the Advent AMP403 Receiver

Audio and Channel Troubleshooting the Advent AMP403 Receiver
Why is there low bass output from my AMP403 head unit?	Subwoofer out of phase, Reverse subwoofer phase Subwoofer level too low (radio) , Increase level at radio Subwoofer level too low (Amp) ,Increase level at amp
Why do I get an error message on my AMP403 head unit that says "Please insert SD card"?	Possible corrupt SD card data, Reload SD card with map data If using a Navigation Unit it may need a software update to correct this issue ,Update software on your navigation unit
Why can't I view photo or video media on my AMP403 head units TFT screen?	Photo / video cannot be viewed while vehicle is in motion, The vehicle must be parked and the brake wire connected properly Newer devices require the jlink2 or jlink3 to view photos / videos,Use jlink2 or jlink3 cable Another possibility: There is an unsupported format being used, try playing a supported format.
Why can't I see or download my phonebook from my mobile phone to the AMP403 head unit?	Not all phones are supported by our Bluetooth solutions. This is an industry wide problem and not limited to our products.
Why don't I have any audio output from my external amplifier when I switch from my AMP403 head units radio source?	The blue power antenna lead is connected to amp turn on lead. Use blue / white wire for amp turn on lead.
Why do the HD channels have static on my AMP403 head unit?	The head unit is switching between digital and analog signal. The HD technology is slightly different from conventional analog radio. You will audible hear the tuner switching from digital to analog tuning. this is not a problem, but the way the tuner works.
Why are the speakers not working when connected to my AMP403 head unit?	The speakers are damaged or defective, try checking speakers.
Why is there no sound from my external amplifier when connected to my AMP403 head unit?	The blue power antenna lead is connected to amp turn on lead. Use blue / white wire for amp turn on lead.
Why is the radio output on my AMP403 head unit higher than other sources?	The source are not matched, adjust the source level in the Set-up menu
Why do I get poor reception from the head unit on the Advent AMP403?	Antenna is not fully extended, ensure antenna is fully extended Vehicle has power antenna, Make sure power antenna control wire is connected properly Make sure the speaker wire is connected properly Make sure you are playing a properly formatted disk
Why is there no repeat or searching function while playing VCD on my AMP403 head unit?	The PBC is turned on, turn PBC off.
Why is there no audio or sound from my satellite radio AMP403 head unit?	There is an improper audio connection. Ensure RCA connectors from the XM tuner are connected properly.
Why is there inconsistent sound or the sound fades or cuts in and out form the AMP403 satellite radio?	There is low signal level reaching the satellite antenna, Relocate your satellite antenna for better reception.
Why does the audio (sound) cut in and out when using my satellite radio with my AMP403 head unit?	There is a low signal level, try relocating the satellite antenna.
Why is the video and audio not in sync when I play video files on my AMP403 unit?	The system resources are exceeded. Occasionally this will happen but the file will eventually catch up.
Why do my HD channels have static on the Advent AMP403?	The head unit is switching between digital and analog signals. HD radio technology is slightly different then conventional analog radio. You will audible hear the tuner switching from digital to analog tuning. This is not a problem, but the way the tuner works.
Why did my factory radio pick up more analog stations than the HD AMP403 radio tuner?	HD signals have lower power output than analog signals.
Why are the speakers not working that are connected to the Advent AMP403?	The speakers are damaged / defective, check speakers. Check to make sure the wiring is connected appropriately and all connections are tight.
How do I change the frequency spacing on my AMP403 head unit to tune in channels in other countries?	The frequency spacing can be changed in the setup menu. Select the "tuning options". Set to tune other frequencies.
When I turn on the AMP403 head unit the volume is very low / high, how do I fix this ?	The turn on volume has been reprogrammed and needs to be reset.
Can I use a portable hard drive with my AMP403 unit?	In some modes, yes.
Why is my AMP403 head unit's Tele-mute activated?	Mute wire is grounded , Unground or connect wire properly
Why is there no subwoofer output from my AMP403 head units?	4.1 is not selected in audio menu, Select 4.1 in audio menu Sub level set to low, Adjust sub level
Why is my car battery losing its charge or dying after a few days since installing my AMP403 head unit?	Battery and ignition wires were not connected properly, Connect wires or confirm connection of wires is as follows: Yellow wire = Battery Red wire = ACC / ignition Ignition wire not connected properly, Red wire = ACC / Ignition DO NOT CONNECT RED WIRE TO A CONSTANT HOT WIRE
Why is there a long delay when I turn off the voice prompts on my AMP403 head units navigation system?	This is normal. If the navigation is in the middle of a maneuver, it will complete the maneuver and then release the audio path.

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