Hello BlueRaven01,
If I'm understanding you right, you're having difficulty getting your iPhone to connect to your Alpine iLX-W650 digital receiver. I'd love to give you some steps that might help you get those devices working together.
Based on the Alpine website, that particular model works with CarPlay. Is that the way you're connecting to it? If so, you may want to take a look at the manual for the Alpine iLX-W650 to make sure it's being connected correctly. You can view it here: Alpine iLX-W650 user manual. The following Apple articles may be helpful as well:
If you aren't using CarPlay and are connecting via Bluetooth, try out the steps here: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch.
Thanks for using Apple Support Communities.
Take care.