Internal Diskette Drive; Power Supply; Monitors, Keyboard, And Mouse - Sun Microsystems SPARCclassic Service Manual

be a 207-megabyte, a 424-megabyte, a 535-megabyte, or a 1.0-gigabyte disk. (The
SPARCclassic X terminal is not a diskful system.)

Internal Diskette Drive

The top half of the system unit accommodates a 3.5-inch, triple-density diskette
TM
®® ®®
drive, which is Sun , IBM , and NEC compatible. It uses 3.5-inch (88.9-mm)
diskettes (types HD, 2HD, and 2DD) and supports densities of 720 kilobytes, 1.2
megabytes, and 1.44 megabytes. The diskette drive is optional on both SPARCclassic
and SPARCstation LX systems. It is not available for the SPARCclassic X terminal.

Power Supply

The 70-watt power supply is housed in the unit top. It connects to the main logic
board via a 12-pin connector and provides +5, +12, and –12 volts DC. The power
supply also supplies the power-on reset signal.
Some of the power supply's features include the following:
4 Auto sensing
4 Output voltage regulation
4 Overcurrent protection
4 Overvoltage crowbar feature
4 Internal fusing
The external devices have their own power supplies.

Monitors, Keyboard, and Mouse

Each system uses a keyboard, an optical mouse, and one of the following types of
video monitors:
4 15-inch color monitor (381-mm)
4 16-inch mid-range color monitor (407-mm)
4 16-inch premium color monitor (407-mm)
4 19-inch grayscale monitor (483-mm)
4 19-inch color monitor (483-mm)
The main logic board has a built-in frame buffer that controls video output from the
system unit and can drive either color or grayscale monitors.
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Product Description