After approx. 2 years problem free my emerson iC172 will not recharge my iPod model A1320.

SOURCE: Time Display

A-ha! Those manuals sure do come in handy sometimes. I found the solution. In addition to functioning as a snooze button for delaying the alarm, the snooze button is also a brightness button for the time. If you press snooze one time it changes the time brightness from bright to dim, press it again and it goes from dim to motion sensitive only, press it again and it returns to bright.

I just tried this and resolved my problem. I hope it helps you as well.
Enjoy!

SOURCE: My Emerson IC172 Clock Radio won't recognize iPod

For this type of problem you will need to talk to Emerson Customer Support. They will know if the functions you want will be available to you with the operation of the Clock/Radio and your iPod. The telephone number for the Emerson customer support is 1-800-909-1240. You can call them during the hours of 8am-4:30pm central time USA. Give them the make and model number of your Clock/Radio and ask them for assistance with your problem. I hope this information help you solve your problem. Thank you for using FixYa and have a nice day!