Apple twentieth anniversary mac Service Manual

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FM radio port
Connects your Macintosh to an FM radio antenna.
TV tuner port
Connects your Macintosh to a TV cable service or antenna.
g
SCSI port
Connects your Macintosh to SCSI equipment such as external hard disk drives and scanners.
f
Sound output port
Connects your Macintosh to headphones, externally powered (amplified) speakers, or other audio
output equipment.
Sound input port
Connects your Macintosh to audio input equipment.
W
External modem port
Connects your Macintosh to a GeoPort Telecom Adapter, external modem, LocalTalk network, 
or printer. 
[
Printer port
Connects your Macintosh to a printer, GeoPort Telecom Adapter, external modem, or LocalTalk
network.
V
Apple Desktop Bus (ADB) port
Connects your Macintosh to an input device, such as a keyboard or a trackball.
æ
Video input port
Connects your Macintosh to a VCR, laserdisc player, camcorder, or other video equipment. 
Audio input port for video
Connects your Macintosh to equipment for recording video and sound together.
F
Security lock port
Lets you attach a locking cable to your computer.
Connecting
Additional
Equipment     
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