HP oscilloscope and capacitors issue

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • jasko_jacker
    Badcaps Legend
    • Oct 2014
    • 1137
    • italy

    #1

    HP oscilloscope and capacitors issue

    Hi,
    I have an HP T912 oscilloscope, the unit has not been never used but it has been for many years on the shelf. I made a mistake (I think) because I tried to turn it on right away without first opening the case to check for issues to components.
    Everything seemed to work well but after a few seconds the system goes off.
    I opened the box and saw that the electrolytic capacitors are damaged.
    my question is:
    I can change the capacitors with others with the same voltage but higher capacity, pulled from a modern desktop trasformer ?
    thank you
    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31015
    • Albion

    #2
    Re: HP oscilloscope and capacitors issue

    how much higher?

    btw, change that black one - in my experience high voltage low-uf caps fail more often than low voltage high-uf types.

    Comment

    Related Topics

    Collapse

    • Acerman123
      MSI K7T Pro2 Ver1 - capacitors have higher values?
      by Acerman123
      Trying to fix this board, MSI K7T Pro2.

      All Tayeh capacitors showed either as damaged or with uf values which were faf from what they should be so I have replaced them and all other capacitors except those big ones near CPU.

      The motherboard powers on but doesn't post. My PCI bios code reader will most of the time dsplay some some kind of code if there has been no power to board for a while but I don't think those codes mean anything in this situation. If I power off the board and try powering it on the second time the code reader usually doesn't show anythin. Unplug...
      08-12-2023, 10:00 AM
    • rounin
      MacBook Air A2337 (820-02016) USB-C Port Issue – Only Works in One Orientation (CC Line Problem?)
      by rounin
      Hi everyone,

      I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.

      🛠 Original Issue
      The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
      Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.

      I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.

      ⚠️ New Problem: One USB-C Port Only Works in One Orientation...
      04-19-2025, 01:18 AM
    • ugamazing
      Three 820-01700 32GB Logic Boards Same Issue: Won't Wake From Hibernate
      by ugamazing
      I have three identical-spec 820-01700 boards (2.6/32/512), and ALL THREE boards came to us with the same fault, from different sources: The boards don't wake from hibernation with the keyboard or lid, they ONLY wake when you press the power button. I understand this is a very minor issue, but the boards must be fixed!

      We will of course begin with the obvious (checking lid signals), but I couldn't help but notice these three boards were all 32GB variants. Has anyone noticed an issue relating to these 32GB boards in particular? I of course don't think it's a RAM issue, but it's bizarre...
      12-17-2024, 07:05 PM
    • praveenramavath
      Majority PETERHOUSE GRADUATE Internet Radio (Auna Silver Star) - Stuck at boot "Welcome" Screen
      by praveenramavath
      Hello All,

      I have an issue with my Majority PETERHOUSE GRADUATE Internet Radio, it keeps rebooting at the boot logo Welcome screen. I have an another forum active in other website but due to lack of response I am posting the same here. I am positing a link below that has pictures including all the troubleshooting I have tried, appreciate if someone can take a look and give me any suggestions.

      https://www.hifivision.com/threads/m...-screen.98243/


      Troubleshooting Summary: Majority Internet Radio - Flash Chip
      ...
      04-26-2025, 09:08 AM
    • ahmarzo
      Acer laptop battery draining issue
      by ahmarzo
      Have a acer laptop ex215-22 with motherboard part no daz8emb18a0 the issue is the battery gets drain overnight upto 25-30 percent even when switched off / shutdown.even after ssd is removed and laptop off with button the battery keeps draining.i have updated the bios but same issue have tried another new battery and the charging works fine only issue is battery is discharging when connected to motherboard in off condition.
      Help me to diagnose this issue as there is no shortage in the inputs MOSFET
      08-02-2025, 06:39 AM
    • Loading...
    • No more items.
    Working...