Sun Microsystems SPARCclassic Service Manual page 135

The mat is supplied with the replacement DSIMMs.
4. Locate and remove the faulty DSIMM.
See "Determining Faulty DSIMM Locations" on page 37.
The DSIMMs are held in their slots by metal clips. To release the modules, pry
apart the clips with your fingernails while pushing the top of the module gently
forward about 30 degrees from the vertical position (see Figure 11–6). Then pull
the DSIMM out of its socket.
Any DSIMMs you remove should be placed on the antistatic mat.
Note - The DSIMMs are closely spaced. In order to remove a DSIMM, you may
need to remove adjacent DSIMMs first. Keep track of which DSIMMs are installed
in which slots. If you are removing a defective DSIMM, take care not to get it
mixed up with the other DSIMMs.
121
Main Logic Board and Component Replacement