re iisi clock upgrade hi i have been getting a lot of requests for this information so i thought i would post it for those interested parties sorry for length to increase the maciisi speed to mhz or mhz the clock must be changed from mhz to mhz or mhz respectively this is done by going to a static free work station or putting some aluminum foil down to work on open up the si by lifting the tabs at the back of the case remove the hard disk by disconnecting the power and scsi cables spreading the tabs and lifting the drive out remove the flopy drive remove the power supply by spreading the tab in front and lifting the supply straight up and out remove the fan by pressing the ears together at the back bottom side of the fan and lifting straight up and out remove the mother board by spreading the tabs on the left and right side of the board and sliding the board forward then lifting the board out all connectors on the back of the board must be removed first desolder the mhz clock the one closest to the memory modules this is not easy even for a skilled solderer get an ic socket with the round pins and remove four of the pins by pushing them up from the bottom with long nose pliers put the four pins in the holes vacated by the clock and solder them in insert a mhz or mhz clock put large power transistor heat sink s on the processor chip and the other large chip just to the right of the processor and figure some way to hold the heat sync s in place i made a simple clamp by putting a four inch screw up through the hole in the board between the two chips mount the screw using insulated washers screw a cross member down over the heat sync s to hold them in place don t use too much pressure put it all back together and go for it disclaimer this is only the procedure i used and is not authorized by anyone you are on your own for this procedure i m quite sure it will void your warentee bye for now ralph durtschi idaho state university email durtralp ux isu edu
