Hi Peter, I am also restoring an old SE/30. The PRAM battery is fairly straightforward even though I have fat fingers.
When I say forward or backwards, I am using the terms as if the computer is sitting normally with the screen to the front (forwards) and the back casing to the rear (backwards). A torch/flashlight or a good source of light is helpful. With the machine switched off, and left for any charge to dissipate: Remove the back casing (15cm/6in Torx T15 needed). Remove the EFI shield on the bottom/sides. Carefully remove the floppy cable from the logic board (LB). Carefully remove the SCSI cable from the LB. Carefully remove the power connector from the LB. You need to get a fingertip behind this to snag a lug loose. Then work the connector gently out from side to side. With those cables folded carefully out of the way, place the SE/30 face down on a protective cloth. On the analog board side of the SE/30, the LB is notched. Carefully slide the LB backwards until the notches line up with the metal frame. Carefully - really carefully - ease the LB from the notches and slip out the other side of the LB (HDD / FDD side) from the frame. Carefully tip the LB down away from the frame a little and you will see a connector running to the speaker. Disconnect this. The battery is held in a small frame on the LB which needs to be popped off carefully - they can fracture. I would use a flat plastic spudger to tease it off. This will also give you an opportunity to examine carefully the board. Mine was covered in dust but little else. No tell-tale signs of capacitor leakage. A good air-duster worked a treat. After you replace the battery, reassembly is a reverse of disassembly. Speaker connector (it only fits one way), then slip LB into FDD/HDD side of frame first. Line up notches in the LB with the frame on the analog side. Slide LB forward. Metal lugs attached to the board should engage in the back of the metal frame. Connect power then SCSI then FDD cables. Replace EFI shield carefully. Replace the casing back. Hope this is of some help to you. Keith On Thursday, 30 August 2012 23:53:10 UTC+1, Peter Williamson wrote: > > Hi - a newcomer to this group - I am restoring an SE30 which still works > but has a seized drive. Have found one recently and will be installing it > soon. I am concerned with notions of possible breakdown of capacitors etc. > on board some help to overcome this would be handy! I would like to > replace pram battery but I hear this is a difficult job - has anyone done > this? I have my original 512 Mac, a Mac Plus with a HD20 and a PowerBook > 190cs - what is amazing that all these old Macs work well with no probs at > all. I wonder that living in Australia with an extra dry climate helps in > keeping these machines operative, the 190 has a broken lid but happily > boots up every time. Most of the software on 3.5 disks work & have boxes of > them though cannot find the old Mac game Dark Castle which was quite > amazing for its time. If anyone has a copy for sale please let me know! > Regards to all > Peter W > Canberra Australia > > Sent from my iPad -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to vintage-macs@googlegroups.com To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
