iMac iSight PITA.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • smason
    Badcaps Legend
    • Feb 2010
    • 1652
    • Canada

    #1

    iMac iSight PITA.

    Wow, talk about difficult to work on.
    Nice design Apple.

    So I've managed to disassemble this thing, and I'm looking at a power supply problem. Even without a load, it just goes tick tick tick.

    This thing looks difficult to service. The startup cap is visible, but really hard to get to.

    One thing I know without even measuring, the big cap is getting voltage.
    How do I know? I disconnected the supply, had let it sit for a while.
    When I picked it up, I lit up. Wow. Been a while since I had a good zap.
    This is the first SMPS I've seen that didn't discharge within a few seconds.
    36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....
  • Toasty
    Badcaps Legend
    • Jul 2007
    • 4171

    #2
    Re: iMac iSight PITA.

    Pics please. Never had the pleasure of seeing ones guts.
    veritas odium parit

    Comment

    • smason
      Badcaps Legend
      • Feb 2010
      • 1652
      • Canada

      #3
      Re: iMac iSight PITA.

      Originally posted by Toasty
      Pics please. Never had the pleasure of seeing ones guts.
      Will get some this evening
      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

      Comment

      • smason
        Badcaps Legend
        • Feb 2010
        • 1652
        • Canada

        #4
        Re: iMac iSight PITA.

        OK here's some mediocre pics
        Attached Files
        36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

        Comment

        • Toasty
          Badcaps Legend
          • Jul 2007
          • 4171

          #5
          Re: iMac iSight PITA.

          Celetronix! RUN AWAY! RUN AWAY!


          Is there a standby voltage?

          What are the output transistor numbers?

          Measure across output on each rail to ground. If low or shorted, it's the same deal as the G5 Celetronix PSU, and you've found your problem.


          Toast
          veritas odium parit

          Comment

          • smason
            Badcaps Legend
            • Feb 2010
            • 1652
            • Canada

            #6
            Re: iMac iSight PITA.

            Yeah I had a shiver run up my spine whan I saw the label. Haven't done any measurement yet. Will get to it some time next wee, betweenk monitor repairs.
            36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

            Comment

            • Toasty
              Badcaps Legend
              • Jul 2007
              • 4171

              #7
              Re: iMac iSight PITA.

              @smason - *BUMP*

              If you have a chance, could you look at this thread and give your input?:

              https://www.badcaps.net/forum/showthread.php?p=153202

              Toast
              veritas odium parit

              Comment

              • alvaroba
                New Member
                • Mar 2011
                • 3

                #8
                Re: iMac iSight PITA.

                Hey guys, finally I found someone tath can helpme, I have an imac celetronix PSU tath randomly shut off, I need a good picture of the underside because it shows signs of broken and burning pathways and i want to rebuid them. If you can take a good picture and sendme or upload here I really thankyou.
                Best regards
                Alvaro
                Sorry about my english, Im from Uruguay

                Comment

                • smason
                  Badcaps Legend
                  • Feb 2010
                  • 1652
                  • Canada

                  #9
                  Re: iMac iSight PITA.

                  OK, time to finally take a close look at this Celetronix supply.
                  Initial disconnected tests, nothing shorted, outputs are all pretty high resistance to ground, and each other. Caps in-circuit test very low esr (probably in parallel) and capacitance is up around 1500uf.

                  Will apply AC and a load and measure outputs after dinner.

                  Not sure about the copper plate on the solder side, heatsink or rf shield? Either way seems to be glued on. Will need it off to test/replace the startup cap.

                  A few photos till I get some measurements:
                  Attached Files
                  36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                  Comment

                  • Toasty
                    Badcaps Legend
                    • Jul 2007
                    • 4171

                    #10
                    Re: iMac iSight PITA.

                    lol
                    Same outputs as the G5 PSU. PHD101NQ03LT

                    Please make sure the load is applied before power up. I think that's one of the causes of failures in the G5's after output replacements.

                    Toast
                    veritas odium parit

                    Comment

                    • smason
                      Badcaps Legend
                      • Feb 2010
                      • 1652
                      • Canada

                      #11
                      Re: iMac iSight PITA.

                      Ok, wired a 1157 across the output, and connected power.
                      Ticking sound, no voltage on the grey wires (where load is connected) pulsing 12ish volts on the brown wire.
                      Guess it's time to peel that plate off and see what's under there that could be shorted.
                      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                      Comment

                      • TheLaw
                        Badcaps Veteran
                        • Jan 2011
                        • 477

                        #12
                        Re: iMac iSight PITA.

                        Hmmph. If you want to be lazy, I think they sell these on eBay for cheap, but...

                        Comment

                        • TheLaw
                          Badcaps Veteran
                          • Jan 2011
                          • 477

                          #13
                          Re: iMac iSight PITA.

                          Sorry to interrupt this conversation but why does the iSight (camera I presume?) have it's own PSU board seperate from the main supply? And why does it have to be so beefy? Last time I checked Webcams could be run off a few mA @ 5V.

                          Comment

                          • alvaroba
                            New Member
                            • Mar 2011
                            • 3

                            #14
                            Re: iMac iSight PITA.

                            Smason youre the f**** master, Im trying to find the patway and the component burned on my power supply on every way trough google, and nothing. But your pics giveme what I need, y gonna try to repair the powersupply and let you if works (if not, I will play soccer with it). Beliveme I write much better in spanish

                            Comment

                            • smason
                              Badcaps Legend
                              • Feb 2010
                              • 1652
                              • Canada

                              #15
                              Re: iMac iSight PITA.

                              Originally posted by TheLaw
                              Sorry to interrupt this conversation but why does the iSight (camera I presume?) have it's own PSU board seperate from the main supply? And why does it have to be so beefy? Last time I checked Webcams could be run off a few mA @ 5V.
                              The iSight is a model, it does have a webcam, but this is the main power supply we're talking about.
                              36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                              Comment

                              • smason
                                Badcaps Legend
                                • Feb 2010
                                • 1652
                                • Canada

                                #16
                                Re: iMac iSight PITA.

                                Originally posted by TheLaw
                                Hmmph. If you want to be lazy, I think they sell these on eBay for cheap, but...
                                True, but I want to fix it, and I don't have high hopes that the iMac will actually work, so don't think it's worth spening money on.
                                36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                                Comment

                                • TheLaw
                                  Badcaps Veteran
                                  • Jan 2011
                                  • 477

                                  #17
                                  Re: iMac iSight PITA.

                                  Originally posted by smason
                                  The iSight is a model, it does have a webcam, but this is the main power supply we're talking about.
                                  Oh...really? Maybe it's iMac w/ iSight. http://www.apple.com/support/isight/.

                                  Regardless,

                                  That's the whole PSU board. Make's sense now. I Was wondering why such a huge board with big components was dedicated to the webcam, of all things.

                                  Comment

                                  • smason
                                    Badcaps Legend
                                    • Feb 2010
                                    • 1652
                                    • Canada

                                    #18
                                    Re: iMac iSight PITA.

                                    Originally posted by alvaroba
                                    Smason youre the f**** master, Im trying to find the patway and the component burned on my power supply on every way trough google, and nothing. But your pics giveme what I need, y gonna try to repair the powersupply and let you if works (if not, I will play soccer with it). Beliveme I write much better in spanish
                                    Glad I could help. If you need any other info, just ask.
                                    36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                                    Comment

                                    • smason
                                      Badcaps Legend
                                      • Feb 2010
                                      • 1652
                                      • Canada

                                      #19
                                      Re: iMac iSight PITA.

                                      For fun I put my semiconductor tester on the FETs. It said they were shorted D to S but I don't think so. Pulled 2 of them (man they're a bitch to desolder) and they test fine.
                                      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                                      Comment

                                      • TheLaw
                                        Badcaps Veteran
                                        • Jan 2011
                                        • 477

                                        #20
                                        Re: iMac iSight PITA.

                                        Originally posted by smason
                                        For fun I put my semiconductor tester on the FETs. It said they were shorted D to S but I don't think so. Pulled 2 of them (man they're a bitch to desolder) and they test fine.
                                        I'd rather shoot myself in the foot than desolder a couple TO-220 or variants.

                                        Comment

                                        Related Topics

                                        Collapse

                                        • reformatt
                                          Intel iMacs, 3rd party SSD failures and Fusion setups
                                          by reformatt
                                          I thought I'd throw out some of my personal experiences in the last 12 months with Intel iMacs, 2.5" SATA SSD drives and Fusion drive data recoveries.

                                          As a backgrounder, Apple never fitted a 2.5" SSD's to these iMacs. Apple's SSD option was a system of 32GB NVMe blade drive (NGFF connector) and Seagate 1TB 2.5" HDD, married together in software to become a Fusion drive. Non Fusion systems have just the 1TB Seagate HDD.

                                          So, the most common reason an iMac comes across my bench is because it's either ridiculously slow, or it fails to boot at all. The most...
                                          12-18-2024, 10:34 PM
                                        • ryogadan78
                                          iMac A1418 - No LED, no power after overvoltage on Ethernet port
                                          by ryogadan78
                                          Hi guys, I need your help again.
                                          I have this iMac from a customer that shut down during a storm along with all the other devices in the house. In particular, the router, connected via Ethernet to the iMac, caught fire.
                                          When I removed the screen from the iMac to check the status of the LEDs, I noticed that none of them were lit. I had a perfectly compatible and working power supply, so I tried it right away, but the problem remained the same (no LEDs). With the thermal camera, I noticed only a slight warming (32 degrees) of the NCP1605BG chip on the power supply. The rest was completely...
                                          06-10-2025, 03:49 AM
                                        • Stephen
                                          iMac M1 DFU restore issue
                                          by Stephen
                                          iMac turns on no drops no cracks, tried to DFU Restore the iMac, logo turns on great! however iMac turns itself off and then restarts to the (!) icon and won't post the restore. Tried thunderbolt 3 cable, tried regular USB C cable and nothing.

                                          this is the message it gives me with the error

                                          Unexpected device state 'DFU' expected 'RestoreOS' (Probably forced into DFU mode externally) [com.apple.MobileDevice.MobileRestore – 0xFAE (4014)].


                                          Any thoughts what this could be? I will open it up and repair it but I am not 100% sure since this iMac doesn't...
                                          03-07-2025, 12:19 PM
                                        • Stephen
                                          iMac 27” 2020 Boot issue
                                          by Stephen
                                          Customer came in for data recovery, came to find out data is soldered on to this iMac (learn something new everyday) this is a 2020 T2 iMac so I was surprised because the iMac Pro has a T2 chip and it isn’t soldered on. Anyways, the iMac boots to Apple logo and then restarts, before it turns off you hear a quarter fan spin then it repeats itself. I decided to do a DFU revive to restore any hardware firmware issues and it was successful in reviving the device however the issue persists in boot looping. It shows the Apple logo for like 40 seconds then turns off and fan spin rinse repeat. I...
                                          08-16-2024, 09:32 AM
                                        • tommy97
                                          iMac Pro 2017 A1862 SSD Upgrade & Recovery mode
                                          by tommy97
                                          Hi,

                                          we've got iMac Pro 2017 which having a problem with SSD, iMac come with 2 SSD's 1TB, it was having a problem with the SSD so we get the replacement, installed in and iMac is stuck in recovery mode, tried to restore it & revive, nothing worked - error 4010. After installing old drives now we're having the same problem that the device is in recovery mode. Previously after swap of the SSD iMac worked on the old SSD however after attempt of revive on the new SSD machine stuck in recovery mode, I can go to DFU but the same result with error 4010.

                                          Any ideas what might've...
                                          04-20-2024, 04:48 AM
                                        • Loading...
                                        • No more items.
                                        Working...