Attached to this post are PDF's of the service manuals for some of the iPods and Apple TV's. Enjoy :)
Appletv (2nd and 3rd_gen).pdf - Apple TV (2nd generation & 3rd generation)

ipod_dock_conn_tp.pdf - iPod (with Dock Connector)
ipod_mini_test_proc.pdf - iPod mini & iPod mini (2nd Gen.)
ipod_nano_tp.pdf - iPod nano
ipod_nano5_testing_proc.pdf - iPod nano (5th generation)
ipod_nano6_Apple_Technician Guide.pdf - iPod nano (6th generation)
ipod_photo_tp.pdf - iPod Photo
ipod_shuffle_tp.pdf - iPod Shuffle
ipod_5th_gen_test_proc.pdf - iPod 5th Generation (iPod Video)

iPod_Hi-Fi_SvcMan_AASP.pdf - iPod Hi-Fi

Continued:
ipod_hi-fi_troubleshooting.pdf - iPod Hi-Fi
ipod_usb-charge-test.pdf - USB Charge Current Test