Schematic for the Apple iMac A1419, logic board 820-00291 with the full revision code 820-00291-05, packed as RAR at about 1.9 MB.

Schematic for the Apple iMac A1419, logic board 820-00291 with the 820-00291-05 revision called out in the name.

Schematic for the Apple iMac A1419 logic board 820-00291, with the -05 revision suffix given in the name, packed in a RAR archive of about 1.89 MB.

PDF schematic for the BN44-00291A power board, a part number in Samsung's BN44 series of power supply modules fitted to LCD and LED televisions and monitors.