wrs@Apple.COM (Walter Smith) (06/21/88)
IMPORTANT DISCLAIMER: As an Apple employee, I want to make sure everyone understands the obvious: Apple does not endorse, recognize, or even contemplate the possibility of someone ripping their Mac apart to change their fan. If you should be reckless enough to do it, it's as the man says in Blood Simple: y'on y'own. Your warranty or AppleShare will vanish in a puff of smoke. Enough said. -------------------- I might have read these messages about fan switching and rushed out the next day to buy some fans at the local Radio Shack. In fact, I might have just installed three of them in some Mac II's here at work. They might actually work. I might be amazed at how much quieter these Macs are. But I wanted to warn people about the following situation: two of three Macs I looked at had Sony power supplies that had nothing to do with the instructions posted here, which apparently deal with Astec power supplies. The Sony supplies are slightly harder to deal with than the Astecs because they have a little PC board mounted above the fan. You have to untwist a metal tab and slice through some silicone cement holding the board to the fan, then take the board out. Also, it's a bit difficult to get the fans in and out, due to a tight squeeze between the fan and some capacitors. However, it's not all bad. The fan is held in with long screws that go all the way through to little brackets on the other side, so you don't have to deal with the press-in nuts. Anyone with some experience playing with the insides of equipment like this will have no trouble figuring it all out. But the posted step-by-step instructions are mostly useless--the case doesn't even open the same way--so if you were relying on them, check the name on your power supply before proceeding. - Walt -- Walter Smith Apple Computer wrs@apple.com Special Projects (408) 973-4015 Disclaimer: Anyone who thinks I might be representing Apple Computer, Inc. in any official capacity on Usenet, of all places, has a serious attitude problem.
wrs@Apple.COM (Walter Smith) (06/21/88)
In article <12549@apple.Apple.COM> I wrote: >Your warranty or AppleShare will vanish in a puff of smoke. Enough said. Actually, your Apple*Care* is a bit more likely to vanish, unless you make a serious mistake in installation! - Walt
holland@mips.csc.ti.com (Fred Hollander) (06/22/88)
In article <12549@apple.Apple.COM> wrs@apple.com (Walter Smith) writes: > >But I wanted to warn people about the following situation: two of >three Macs I looked at had Sony power supplies that had nothing to do >with the instructions posted here, which apparently deal with Astec >power supplies. > So that's the deal. I just did mine last night. It was difficult to verify all of the components described in the instructions. I did verify that the same fan is used. >The Sony supplies are slightly harder to deal with than the Astecs >because they have a little PC board mounted above the fan. You have >to untwist a metal tab and slice through some silicone cement holding >the board to the fan, then take the board out. Also, it's a bit >difficult to get the fans in and out, due to a tight squeeze between >the fan and some capacitors. > I couldn't believe the instructions said, "It is possible to remove the fan without removing any components". I did exactly as you describe. I didn't think it was too bad. I thought I was getting away easy not having to disconnect and keep track of any more wires. >However, it's not all bad. The fan is held in with long screws that >go all the way through to little brackets on the other side, so you >don't have to deal with the press-in nuts. > >Anyone with some experience playing with the insides of equipment like >this will have no trouble figuring it all out. But the posted >step-by-step instructions are mostly useless--the case doesn't even >open the same way--so if you were relying on them, check the name on >your power supply before proceeding. > There are two screws at in the back of the power supply on the side opposite the mounting screws for the fan. Then the cover pries off from the side where the screws were. There are clips on the opposite side and guides halfway down. You need to pay attention to the guides when putting the cover back on. >- Walt >-- >Walter Smith Apple Computer wrs@apple.com > Special Projects (408) 973-4015 >Disclaimer: >Anyone who thinks I might be representing Apple Computer, Inc. in any >official capacity on Usenet, of all places, has a serious attitude problem. Fred Hollander Computer Science Center Texas Instruments, Inc. holland%ti-csl@csnet-rela