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speggio91
Senior Member
Last Activity: 11-12-2024, 03:50 PM
Joined: 04-11-2020
Location: Italy
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  • speggio91
    replied to PS5 PSU ADP-400DR no power
    in Troubleshooting Power Supplies and Power Supply Design
    Thanks everyone for the suggestions so far!

    I've done some more troubleshooting since my last post. I replaced all three optocouplers, and I've also tested all the diodes, zener diodes, transistors, and resistors on the primary side. None of them seem to be faulty. I haven't tested any of the capacitors yet, so that's still an area to explore.

    At the moment, I'm focusing more on the secondary side, where there's a DAS01B chip that I suspect might be a control chip communicating with the optocouplers, but unfortunately, there's no datasheet available for it. I've already...
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  • speggio91
    replied to PS5 PSU ADP-400DR no power
    in Troubleshooting Power Supplies and Power Supply Design
    I have an update: I found that a 30Ohm resistor that connects the TEA2016AAT to GND was broken, so I replaced it and now the power supply will output the 12V without shutting down.
    The problem now is that it fails under load. Even at lower currents the voltage drops drastically, e.g. at 4A it drops to 10.9V. The voltage on the filter capacitors remains stable at around 395V, but sometimes it goes up to 410V, especially when I disconnect the load.

    Do you think the problem is on the secondary side? Because I think the PWM and APFC are working fine.​
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  • speggio91
    replied to PS5 PSU ADP-400DR no power
    in Troubleshooting Power Supplies and Power Supply Design
    Thanks for the suggestion!

    I desoldered and measured the ESR of both main filter capacitors, as well as all the 12V output electrolytic capacitors. Every capacitor tested fine with 0 ohms ESR, and the capacitance values are within the expected range.

    Since the capacitors seem to be in good condition, I'm thinking the issue might lie somewhere around the PWM/APFC/LCC controller (TEA2016AAT). I'm considering checking the resistors and diodes in that area, but if you have any specific pointers or suggestions on which components to focus on, I'd really appreciate the guidance....
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  • speggio91
    started a topic PS5 PSU ADP-400DR no power
    in Troubleshooting Power Supplies and Power Supply Design

    PS5 PSU ADP-400DR no power

    Hi everyone,

    I'm working on a PS5 power supply (model ADP-400DR) that's giving me some trouble. The issue is that no 12V output is coming out.

    Initially, I found the DAP053T chip responsible for APFC/LCC/PWM was faulty because it was getting very hot (around 100°C) and had no VCC on pin 13.
    I replaced it with an equivalent chip (TEA2016AAT). Now, when I connect the main AC voltage, I measure 395-400V on the main filter capacitor, but the 12V output appears only for a few seconds before it starts dropping to zero.
    I then disconnected pin 3 of the optoisolator...
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  • speggio91
    replied to ADP-160FR ps4 slim PSU, shuts down under load and has severe coil whine.
    in Troubleshooting Power Supplies and Power Supply Design
    FINAL UPDATE ON MY CASE:

    replacing the IC 41 (NCP1608) from a donor board made the power supply able to sustain the load and power on the PS4.
    Be careful when you buy chips from ebay or alexpress guys.
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  • speggio91
    replied to ADP-160FR ps4 slim PSU, shuts down under load and has severe coil whine.
    in Troubleshooting Power Supplies and Power Supply Design
    EDIT 2:

    putting the power supply back on the PS4 and trying to power it on, lead to the same issue of not powering on. After pressing the power button the blue led light on for a second and the it shut down.
    The PS4 is fine, it works with another known good PSU.
    I guess there is more issue to uncover on the faulty psu....
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  • speggio91
    replied to ADP-160FR ps4 slim PSU, shuts down under load and has severe coil whine.
    in Troubleshooting Power Supplies and Power Supply Design
    EDIT:
    I think I found the issue!
    I forgot that the 12V controller DDA001AG was not take off a donor board but isntead bought from an ebay seller who sold me also a defective NCP1608.
    After watching the video that another user posted on another thread ([URL]https://www.youtube.com/watch?v=sx0oBXsueFk[/URL]) I then tried right away to extract a DDA001AG from a donor board i recently bought and guess what?
    Now the 12V is stable even at 18A of load and the coil whine is gone! The voltage is not going lower than 11V and the filter capacitor voltage is 409V. Amazing!
    ...
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  • speggio91
    replied to ADP-160FR ps4 slim PSU, shuts down under load and has severe coil whine.
    in Troubleshooting Power Supplies and Power Supply Design
    Hello, I have a similar case with a PS4 power supply, model ADP-240CR.
    It's story is that the PSU had the main fuse blown and the STF24N60M2 mosfet shorted.
    I've then replaced it mistakenly with a 24NM60M2 that has 17 A of max drain current compared to the 18A of the STF24N60M2.

    As soon as i powered the psu back on and enabled the 12V line, the 24NM60M2 bursted into pieces and damaged other components such as a tiny 50ohm resistor (R98), a diode (D63), the PFC IC controller NCP1608 (IC41) and the 12V controller DDA001AG (IC32).
    After replacing those components from...
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  • speggio91
    replied to PS4 ADP 240AR fat power supply BLOOD
    in Troubleshooting Power Supplies and Power Supply Design
    Hello,

    I've stumbled across this thread because I'm trying to repair the same power supply.

    in my case i have a blown Q5 mosfet. I also found that R98 and D63 are bad.
    I see that D63 have the "A6" marking, googling it i found it correspond to [URL="https://www.mouser.it/datasheet/2/916/BAS316-3081362.pdf"][B]BAS316,115 [/B]diode.[/URL] Could it be?
    I've read that i should check or replace the driver IC, do you know where is it in the board or the ic name?
    About R98, the original value is 50Ohms, right now I only have 47 or 62 Ohms...
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Finally I think I've fixed it!

    What did I do:
    -Retouched with flux and solder all the connectors of J8300
    -Replaced U5810
    -Replaced U3540 (not really necessary but it didn't have a good look)
    -Retouched pins #11 and #12 of U5800 which was previously reflowed but those two pins seemed to not have a proper connection with the board.

    What a journey! Thanks you all for the support and I hope this topic will help someone else in a similar situation.

    Merry Christmas!
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    Last edited by speggio91; 12-24-2023, 10:17 AM.

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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    good board display connector diodes measurements (display attached):

    1. 0.0V
    2. OL
    3. 0.62V
    4. 0.62V
    5. OL
    6. 0.66V
    7. 0.66V
    8. 0.66V
    9. 0.66V
    10. 0.66V
    11. 0.66V
    12. OL
    13. 0.0V
    14. 0.63V
    15. 0.58V
    16. 0.58V
    17. 0.0V
    18. 0.50V
    19. 0.50V
    20. 0.0V
    21. OL
    22. OL
    23. 0.0V
    24. OL
    25. OL
    26. 0.0V
    27. OL
    28. OL
    29. 0.0V
    30. 0.0V

    bad board display connector diodes measurements (display attached):
    ...
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    The LCD show spotlights only with the bad board. With the known good one there's nothing visible.
    Good Board (no spotlight effect) Bad Board (subtle spotlight effect)
    2 Photos
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    For lcd backlight controller you mean LP8550 (U7701)?

    In the schematics I've found only BKL_SDA and BKL_SCL. Did I miss something else?

    BKL_SDA = 0.554V (diode mode)
    BKL_SCL = 0.553V (diode mode) and 3.3V (voltage to ground)

    I've also tried to run the ASD in another good known board and that error still show up.

    One thing I noticed on the water damaged board, is that on the half bottom right side of the LCD, there's a spotlight effect, that doesn't happen with the good known working board.
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    Last edited by speggio91; 12-23-2023, 06:34 PM.

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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    I've downloaded and ran ASD EFI 3S156 from an USB drive, I did a full test cycle and an error has been found. I've attached a picture about it. No sensor issues was found though.

    I might try to remove and replace U5810, as seen in the Rossmann forum topic, even if I'm a bit skeptical that it would make any difference....
    1 Photo
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Thank you for the hints Mon2.

    The trackpad i'm using belong to a known good case, I'ìve tested it with another functioning board with no issues on the sensors.

    I've took some measurements for all the SMBUS scl and sda lines:

    SMBUS_SMC_0_S0_SCL = 2.9V (voltage to ground) and 0.58V (diode mode). With the display connector detached the diode mode value is: 0.77V and the voltage to ground is 3.3V

    SMBUS_SMC_0_S0_SDA = 2.9V (voltage to ground) and 0.59V (diode mode). With the display connector detached the diode mode value is: 0.77V and the voltage...
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    I've finally received some LP8550 alongside with some MMBT3904LP-7B DFN-3 (Q5158). After replacing both components the backlight is functioning properly, it only need to have its slope reprogrammed as suggested by piernov.
    When the system boots, the fan is still spinning at full speed and the system is a little bit slow. I've downloaded macs fan control, but all the sensor reads good temperatures and the cpu doesn't seem to be thermal throttling.
    I've tried to do the PRAM and SMC reset and they both gave no improvements.
    If I startup the Macbook in SMC bypass mode, the system...
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  • speggio91
    replied to 820-00165 pulsing and stuck at S5
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Hello again,

    J6100 is completely clean, no water went on it.
    In the SPI area there wasn't any water infliltration either. I've checked all the connection between all the resistors and they are all interconnected.
    I've replaced U6100, U5620 from a donor board, nothing has changed.

    On the bottom side of the board there is nothing that got touched by the liquid, no corrosion was found.

    I've first reflowed the SMC, nothing has changed.
    I've then desoldered the SMC and I've found that the pad 117 (PP3V42_G3H) is gone. I've scraped underneath...
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  • speggio91
    replied to 820-00165 no greenlight in S0 state
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    Good news!

    I've purchased an early 2015 air in immaculate conditions that had no power issue. I've fixed the board and I swapped it with the one of this topic.

    The machine is actually turning on, the screen image and backlight are working and the battery is charging.
    The charger led is also working, turned out to be the flat cable 821-1722 that had a pin that desoldered after it got shorted when it got water damaged.

    After booting, the OS is kinda slow due the missing transistor Q5158 that I will replace as soon as I will get some more of them.
    ...
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    Last edited by speggio91; 11-27-2023, 06:24 PM.

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  • speggio91
    replied to 820-00165 pulsing and stuck at S5
    in Troubleshooting Laptops, Tablets, and Mobile Devices
    All the caps above the CPU are measuring good values, no short have been found.

    All these SPI lines are connected to the respective resistors.
    SPI_ALT_CS0_L
    SPI_CLK
    SPI_MOSI
    SPI__MISO_R
    SPI_IO2_R
    SPI_IO3_R​
    All the resistance values are correct, no traces of corrosion or liquid damage has been found on the SPI area or R8020 one.

    Measuring the resistance of all the main S4, S3 and S0 power lines didn't show any shorts to ground.

    I've tried to replace from a working board U1950 and u7400, nothing has changed, the...
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    Last edited by speggio91; 11-26-2023, 05:50 AM.

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  • speggio91
    started a topic 820-00165 pulsing and stuck at S5
    in Troubleshooting Laptops, Tablets, and Mobile Devices

    820-00165 pulsing and stuck at S5

    Hello everyone!

    I have this board that got slightly water damanged and it is stuck at S5 state. It pulses once every 5 seconds.
    When connected the magsafe 2 to the bench psu, the current goes from 0.02A to 0.10A when is pulsing.

    When using the genuine magsafe 2 charger, the light turn on and it became green and then amber. The fan is not spinning.
    When I tried the SMC bypass mode, the fan spins a quarter every 5 seconds and the pulsing is still present every time the fan spin.

    The pulses are present in the CPU Vcore rails on L7320 and L7310....
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    Last edited by speggio91; 11-25-2023, 11:29 AM.
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