See also:

Adjusting sound quality and volume balance
Press the “TUNE/SEL” knob to enter iPod menu mode. Pressing the “TUNE/SEL” knob changes sound modes.  - About iPod • Apple is not responsible for the operation of this device o ...

General maintenance
Listed below are the general maintenance items that should be performed at the intervals specified in the “Warranty and Service Guide” or “Owner’s Manual Supplement”. It is recommended t ...

Battery
Check the battery as follows:  - Battery exterior Make sure that the battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps. 1. Terminals 2. H ...