hi all...
any idea as what to check on these units?
i assume recap or at least look/smell around for burnt electrolytics...
anything known to go bad on thes units?
any chance of getting a service manual?
cheers,
nate
Hi!
Which particular G4 do you have? There are a few different supplies in use, some across more than one model.
They seem to be pretty good quality, I have some that have run around the clock for pretty much the past eight years.
I would definitely check that. When working with even a moderate load, these supplies run warm and don't move much air through the casing.
William
On Fri, 6 Feb 2009 12:56:27 -0500, n8ball wrote (in article ):
The Official Apple Service Manuals are available from several different sources online but they focus on problem isolation to the module level and then replacement of the module. That is, all they will tell you is to replace the power supply and tell you how to do it. I have never seen a schematic of an Apple product after the Apple IIe... and I have looked :-)
-- Nelson
ok thanks!
i have the "windtunnel" powermac g4 MDD 2003
they used to have a power supply exchange program but alas this is long gone (i called apple support) :^(
Nelson wrote in news:0001HW.C5B2BFB801179626F0182648 @news.astraweb.com:
Have yet to hear from the owner, but I think I 'fixed' an Apple power supply last week.
Symptoms: intermittent shutdown/lockup of the computer.
Opened it up, visual instpection. I saw a cap with the 'bulgies'. Obtained a new cap with identical ratings (including temp) and replaced it.
If there are still problems, I will bring my ESR meter from home and check/replace the rest of the bad caps.
I understand that many Apple power supplies are failing and the replacements are expensive.
-- bz 73 de N5BZ k please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. bz+ser@ch100-5.chem.lsu.edu remove ch100-5 to avoid spam trap
On Sun, 8 Feb 2009 15:42:58 -0500, bz wrote (in article ):
While I haven't opened up one of these in years, my impression is that they are just standard computer switching power supplies with some minor modifications to conform to Apple's specs. I doubt if there are any Apple proprietary innovations involved.
-- Nelson
Hi!
You may ask an Apple authorized reseller and service center if they can help. I have one in my area, and when I called about a power supply for a Quicksilver 2002 G4 system, they assured me I could get one.
That was about a year ago, and the Quicksilver 2001 systems have or will be losing parts support for now.
I did not end up needing to order one, so I don't recall the cost. It turned out that the supply in question simply needed to be unplugged for a bit to restore normal operation. I'm not sure why it acted that way, it is still running to this day.
William
Don't assume it's the power supply until you have reset the motherboard. Some kinds of (power surge or other) faults result in a shutdown that requires a motherboard reset button be pressed, or (if you can't find the button) remove the clock battery for a few minutes, then reinstall.
Cable and mounting details are slightly different from commercial replacement supplies, you'll have to get an Apple replacement, or open the power supply up for component-level troubleshooting if reset doesn't fix the problem.
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