fault in laptop charger 65 W lenovo usb c (adlx65ycc3d)

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • claws77
    Senior Member
    • Apr 2024
    • 99
    • India
    #1

    fault in laptop charger 65 W lenovo usb c (adlx65ycc3d)

    this is a cross post.
    the laptop charger does not work. no output voltage.
    removed 18V and GND cable from secondary, left ID cable-- suspecting short in output cord and then measurements were made.
    input cord is fine -- checked. 220 V AC
    primary transformer voltage (V_DE) is fine - checked 310.1 VDC
    secondary transformer voltage is 0V (V_AB) -dont know why
    C1 and C2 are electrolytic caps marked at 470uF but reads 987 uF -- seems connected in parallel. V_c1 =0V and V_c2 = 0V.
    Attached Files
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • motormayhem
      Lenovo T460 Only Charges on One Charger
      by motormayhem
      Laptop Question
      Hello,
      I'm working on a Lenovo T460 that has been having trouble charging as of late. Its worked well since I've owned it for a few years. When I went to use it the other day it was dead and wouldn't turn on (was sitting on an Anker 65W GaN charger). After some fiddling with the charger I got it to turn on and start charging, but seemed like the charger was not working as it should (took a few plug and unplug cycles to get it to start charging).

      A day later it was dead again and wouldn't boot/charge no matter what I did. No lights or anything when...
      05-12-2023, 01:46 PM
    • claws77
      fault in laptop charger 65 W lenovo usb c (adlx65ycc3d)
      by claws77
      the laptop charger does not work. not output voltage.
      removed 18V and GND cable from secondary, left ID cable-- suspecting short in output cord and then measurements were made.
      input cord is fine -- checked. 220 V AC
      primary transformer voltage (V_DE) is fine - checked 310.1 VDC
      secondary transformer voltage is 0V (V_AB) -dont know why
      C1 and C2 are electrolytic caps marked at 470uF but reads 987 uF -- seems connected in parallel. V_c1 =0V and V_c2 = 0V....
      06-15-2024, 04:49 AM
    • Mita99
      Lenovo Thinkpad P72 EP720 NM-B723 MB - Power disabled within 2 seconds after plugging the charger
      by Mita99
      Hi,

      Try to repair a Thinkpad P72 EP720 NM-B723 MB with I7-8850H processor and N18E-Q1-KB-A1 (P3200) GPU with 6GB memory. Unfortunately there is noinfo what happened to the laptop. I got it disassembled with parts missing, like keyboard, battery.

      Unfortunately I have no schematic available for me (requested in the sub porum) but got the boardview file.

      Symptom: after connecting to the charger the power led light up for one-two second and switch off. After a couple secons the power led light up for half a second and switch off. No battery, no IO board, no...
      04-27-2025, 07:20 PM
    • totto210
      lenovo legion 5 15-lmh05 nm-c911 charger problems
      by totto210
      Hi guys, well the summary is this:
      the equipment arrived because it did not turn on (it had been the original 230w source the problem) then I feed with my regulated source and without wanting to invert the poles. the equipment turned on and turned off.
      This damaged the charger and its mosfets both high and low switching.
      It also damaged the input mosfet (pq102).
      by chance i had another lenovo legion just like this one and i removed the components and tried to turn it on and it turned on but ....... it burned again the high and low mosfets and switch (pq104, pq105, pq103)....
      05-23-2024, 10:03 AM
    • Document Archive
      Lenovo 3000 Series Schematic
      by Document Archive
      Lenovo 3000 Series Schematic

      Lenovo 3000 was a line of low-priced notebook and desktop computers designed by Lenovo Group targeting small businesses and individuals. It was replaced with the IdeaCentre and IdeaPad brands.

      3000 C100 laptop with Braille keyboard
      Lenovo 3000 C
      C100, C200 - 15-inch XGA screen
      Lenovo 3000 N
      N100, N200 - 14.1-inch- and 15.4-inch- WXGA models
      N500 - 15.4 inch screen.
      Lenovo 3000 V
      V100, V200 - 12.1-inch WXGA models
      Lenovo 3000 G
      G400, G410, G430, G450, G455, G510, G530, G550, and G560...
      10-04-2024, 06:05 AM
    • Loading...
    • No more items.
    Working...