"Hi help I need to fix an iMac with the same PS board, damaged by a lightning strike. When I opened it, the board wasn't working at all: I replaced two burned SMD resistors and two capacitors, and the iMac came back to life. But after a short time it became to shut down and restart by itself... I guess I misread the value of some burned component, replacing it with the wrong one(s). Can you please . me? They are R003, R004, C009 and C010. Many thanks in advance!"
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Re: Power supply iMac A1311 help
Hmm.. I tried to find a schematic on the PSU but couldn't really. Have you looked to see what chips are in use on the PSU and tried to get schematics based on that? Knowing apple they might be relabeled in some way to keep people from repairing stuff. ^^; But in leu of a schematic I would probably take a look to see if you can find any datasheet on the switchmode chip and, if it is one close to the chip, you may be able to find the recommended value of the resistors. A lot of switchmode chips have really full schematics or details on their operation.
The other option could be looking on eBay for a board. From what I am seeing there are many used boards for around 15-20$. That is pretty decent considering how beefy the power supply actually is for its form factor. You could, for instance, buy one as a replacement for your mac book, figure out what part values you need for the other, then use one of the two PSU's for a project later. You might even be able to just ask one of the sellers if they could send you an HQ picture of the board.
From what I can gather, the board for your A1311 is either a 614-0445 or 661-5299 board. I could be wrong on that though.. Maybe someone else would be more able to help you.
“Men always seem to think about their
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– Jet (Cowboy Bebop) - -
Re: Power supply iMac A1311 help
Im also looking for a schematic for 614-0445 mac psuComment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
Hi, Need boardview and schematic of iMac A1311 EMC 2389 Mid2010 -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
Hi all, I just need to know that, can i use SMPS type power supply to test and short circuit detection on a laptop motherboard?
I saw 95% of repair guys are using only Linear bench power supply. linear bench power supply is pricy, thats why i planned to get one SMPS supply.
i know that in linear power supply the noise will be very low comparing to SMPS supply....
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