Sun Microsystems SPARC classic Service Manual page 85

4. Disconnect all cables attached to the main logic board.
For connector locations, choose the appropriate board illustration in Chapter 11
"Main Logic Board and Component Replacement.
1. Disconnect the 12-pin power supply cable from its mating connector by squeezing
the clip at the end of the cable and pulling straight up.
2. Disconnect the keyboard soft power-on cable from its connector next to the 12-pin
power supply connector.
3. Disconnect the LED/speaker cable from its mating connector on the main logic
board.
4. Disconnect the diskette drive and hard disk drive data cables from their
connectors at the front of the main logic board.
5. Remove the main logic board.
1. Pull the main logic board extractor lever toward the front of the system unit to
disconnect the main logic board from the system I/O board (see
2. Raise the speaker assembly to allow removal of the main logic board
(see ).
FIGURE 8-5
3. Grasp the board by the SBus connectors with both hands. Tilt the board slightly to
avoid the speaker assembly and lift it up and out of the system unit (see
). Avoid handling any of the delicate electronic components or touching
FIGURE 8-6
any of the circuit board traces.
4. Place the main logic board on an antistatic mat.
FIGURE 8-4
Chapter 8 Major Subassemblies
).
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