help identify Imac transformer

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • robyb
    New Member
    • Nov 2022
    • 3
    • germany

    #1

    help identify Imac transformer

    i managed to break off a transformer from my Imac a1418 logic board when i was mounting it back.

    it's this one and i cannot identify it so i can order a new one.

    Also it would help if someone can tell me if it could be the reason why my Imac will not start.

    The green led is "on " on the motherboard , but when i hit " power on" nothing happens.

    i will attach the schematics here.



Related Topics

Collapse

  • juntmeako
    identify torroidal transformer amperage
    by juntmeako
    hello, i recycled a torroidal transformer from a speaker, i want to know how much amps of this transformer, olease help me identify, i will be using this to build my bench psu...
    05-12-2022, 06:12 AM
  • ohren
    Original Xbox 1.0 PSU: Foxlink FTPS-0002 Rev. B. — 12 V low, 5 V high — transformer?
    by ohren
    Hello!

    I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.

    Measured voltages with no load:

    After rectifier diodes
    12V: 6.17 V
    5V: 5.67 V

    Secondary transformer pins AC measurement (really don't know if this says anything)
    12V: 2-2.5 V
    5V: 1.04 V


    I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,...
    03-18-2023, 10:33 AM
  • 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
  • dennis_elx33
    3PHASE STEP-DOWN Transformer in Check
    by dennis_elx33
    Hello All,

    i would like to post an interesting topic regarding 3-phase stepdown transformer which we suspect to cause an overcurrent (138A) which resulted to power tripped off of the HV power supply (80KV output).


    Problem statement: Power tripped Off

    Initial Problem: Found 2 IGBT and 2 rectifier diodes shorted (burnt).

    Action Done:
    1) Replaced the faulty parts with good spare.
    2) Measured impedance of the 3phase input lines and found that L2 to L3 has 23.3ohm while other pairs are 51Kohm. This pins will...
    12-02-2024, 06:52 AM
  • Loading...
  • No more items.
Working...