Sun Microsystems SPARC classic Service Manual page 84

Caution – When the system power switch is in the Standb position, and the AC
power cord remains connected to a power outlet, hazardous AC voltage is still
present in the power supply primary. Do not attempt to service the power supply
under these conditions. Disconnect the AC power cord prior to handling the power
supply. When servicing any other system component, the AC power cord should
remain connected and poses no safety hazard.
System I/O board
FIGURE 8-3
2. Place an antistatic mat, shiny side down, next to the system unit.
3. Remove any SBus cards installed in the system unit.
See Section 11.1 "SBus Cards" on page 11-1 for removal procedures.
8-8 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
Main logic board
UNIT BOTTOM
System I/O Board and Unit Bottom
Speaker/power
LED assembly
Main logic board extractor lever