Antique LED tester II

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  • 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
  • mikey5791
    Is it possible for transformer substitution?
    by mikey5791
    Hi all,
    Got this local made DC power supply (12/14V) given free as the transformer has melted. There is no marking or indication to identify what type or rating of transformer used.
    Fyi,. I had a busted autogate mainboard with transformer with marking 13-0-13 . Is this the 13v dc type transformer?
    My questions are
    1. How do i test to see if the transformer is in good working condition?
    2. Can this transformer (marking 13-0-13) be used to replace the melted transformer on the DC power supply?
    Hope you guys understand what i was asking. My intention is...
    11-03-2022, 02:11 AM
  • Briesmith
    Can High Side damage on an SMPS get across the Transformer to the Low Side?
    by Briesmith
    I have a blown smps and I am looking for some reassurance as to the amount of diagnosis I have to do. It blew the instant I plugged it in not under any load.

    As you can see from the attached pix, the damage is located around the main or bulk capacitor (since removed for testing) and the resistor array/network that drives it (the bunch of SMD components to the left of the YAMAHA YC775 AMPS logo). The burn mark on the frame clearly shows the pins of the capacitor. And, for the avoidance of doubt, there is no way the board could have contacted the frame, it was correctly mounted on...
    05-06-2023, 09:36 AM
  • 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
  • Document Archive
    ASUS Transformer T101HA - X5DHD Hybrid (2-in-1) Book Specification for Upgrade or Repair
    by Document Archive
    This specification for the ASUS Transformer T101HA - X5DHD Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T101HA - X5DHD boardview and T101HA - X5DHD schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet,...
    09-06-2024, 04:40 PM
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