Apple twentieth anniversary mac Service Manual

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m One external standard SCSI port for storage devices, scanners, printers, and other SCSI devices;
supports up to six external devices
m One 3.5-mm sound output port for line-level devices, such as powered loudspeakers, on the back of
the computer
m One 3.5-mm headphone jack on the front of the computer
m One 3.5-mm sound input port for stereo sound input
m One 3.5-mm sound input port for stereo sound related to video recording
The two sound input ports support a standard stereo (miniplug-to-RCA) cable adapter for
connecting stereo equipment to your computer. They do not support the Apple Omni microphone
(the round microphone shipped with some earlier models of Macintosh) or the attenuated RCA
adapter provided with some models of Macintosh.
Note:  Equipment attached to the sound input ports must generate line level output.
m S-video input port for VCR, camcorder, or other video input device; adapter for composite video
input devices; supports NTSC, PAL, and SECAM video standards
m F-type connector for TV cable or antenna
m Connector for FM antenna
m Front panel buttons for volume and brightness
m Support for infrared remote control of audio CDs, and for muting sound, setting volume, changing
TV or FM channels, adjusting the video window, and turning the computer on and off
Environment
Operating temperature:  10° C to 35° C (50° F to 95° F)
Storage temperature:  –40° C to 47° C (–40° F to 116.6° F)
Relative humidity:  5% to 95% noncondensing
Altitude:  Works below 3048 m (10,000 ft.) 
Appendix D
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