what capacitor should I purchase for LCD display PCB?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • chth96
    Senior Member
    • Nov 2022
    • 118
    • indonesia

    #1

    what capacitor should I purchase for LCD display PCB?

    I want to fix Video door phone which works its doorbell but it is not able to display any screen.
    So I disassembled its plastic case and I detached FPC film cable from LCD display in order to inspect LCD display's PCB
    I measured ESR resistance of all smd capacitor on this PCB and I noticed that there is some SMD capacitor which has high ESR value(48ohm 50V 0.47uf,15 and 28 ohm 50v 3.3uf,10 and 8 ohm 35v 10uf)
    I desoldered this 5 suspicious SMD capacitor like below screenshot.
    images2.imgbox.com/51/b8/8WVZwDpV_o.jpg

    But I cannot identify specification of desoldered capacitors below screenshot. What capacitor should I purchase for LCD display's PCB?
    PMs5wh9v_o.jpg (2448×3264)
    Last edited by chth96; 05-24-2025, 10:59 PM.
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 31269
    • Albion

    #2
    any caps higher than 1uf you can use any good low impedence cap like panasonic FR or rubycon ZLJ etc
    for 1uf or under it's not easy to find good electrolytics so use a polypropylene film cap

    Comment

    • chth96
      Senior Member
      • Nov 2022
      • 118
      • indonesia

      #3
      Is it possible to use KMG Series capacitor for over 1uf smd capacitor on LCD display's PCB?
      And As far as I know, polypropylene film cap is non-polarized. Is it possible to use 0.47uf non-polarized film cap instead of smd or dip 0.47uf polarized capacitor?

      Comment

      • momaka
        master hoarder
        • May 2008
        • 12175
        • Bulgaria

        #4
        KMG is UCC's general purpose series... but even these should be better than bad caps with 5+ Ohms of ESR.
        Film caps (be it PP or PE) are pretty much always fine to use as replacements in places where low capacitance (under 1 uF) electrolytic caps resided before. Both PP and PE tend to have better high-frequency filtering than electrolytics do.

        Comment

        Related Topics

        Collapse

        • MORETTIGIAN
          Capacitor detached from PCB – RTX 2070 Super Founders Edition
          by MORETTIGIAN
          Title:
          Capacitor detached from PCB – RTX 2070 Super Founders Edition

          Description:
          During maintenance on an RTX 2070 SUPER Founders Edition, I found a capacitor lying on my desk after reassembly.
          I did not notice it detaching, so I am unsure of its original location on the PCB.

          Procedure performed:
          - Removed backplate
          - Cleaned heatsink and PCB with isopropyl alcohol + soft ESD brush
          - Reapplied thermal compound
          - Reassembled card

          Observed behavior after reassembly:
          - GPU powers on and operates normally under...
          09-18-2025, 12:14 PM
        • chth96
          What capacitor should I purchase for Power Supply of obsolete game consoles?
          by chth96
          hello.

          I have Sega Saturn and 5 years ago, I recapped all of capacitor in the Power supply, Because At that time, It frequently freezed black screen after SEGA logo displayed.

          It hardly ever freezed after I finished to recap all of caps in the power supply.

          But Yesterday, It did not show any screen at all and its green power LED constantly blinked.

          To my surprise I found that all of two NXH 10v 2200uf capacitors in the secondary area of Power supply have been bulged and It measured 57 mF and 75 mF capacitance.

          It seems that quality...
          10-01-2024, 08:14 AM
        • Prolog
          RTX 3080 FE Identifying capacitor
          by Prolog
          Hi people, I hope this is the correct spot to post this, I'm new to the forum.

          I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.

          I hope these photos make it clear which component I am referring to:
          (yes, the soldering is a bit botched from removing the blown one, I know)

          I have found the board schematic (attached), but there does not seem to be a boardview available. I have never...
          12-01-2024, 08:27 PM
        • Agent24
          Dick Smith Q-1760 linear power supply filter capacitor question
          by Agent24
          I have acquired a used Dick Smith Q-1760 power supply - although the OEM is Manson Industrial
          It has at least one problem.

          The voltage control potentiometer VR2, 50K is faulty - going high resistance / open circuit in the CCW end and leading to the output voltage jumping around.
          I have already ordered a replacement potentiometer, so that's not an issue.

          Now, I want to replace all three electrolytics on the PCB as they are CapXon and I don't trust them so much, I will replace them with something better while I've got the thing apart anyway.
          All are CapXon...
          10-21-2025, 05:39 PM
        • chth96
          If I replace with inferior capacitor, Is it No harm to other IC components at all?
          by chth96
          I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
          Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
          It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
          So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
          I know that these capacitor will not last as long as nichicon capacitor...
          12-22-2023, 04:34 AM
        • Loading...
        • No more items.
        Working...