Hello Guest, if you are reading this it means you have not registered yet. Please take a second, Click here to register, and in a few simple steps you will be able to enjoy our community and use our OpenViX support section.
Results 1 to 7 of 7

Thread: help damaged C548 on underside of mother board tryingto replace caps

  1. #1

    Title
    Junior Member
    Join Date
    Mar 2015
    Location
    Derbyshire
    Posts
    10
    Thanks
    1
    Thanked 0 Times in 0 Posts

    help damaged C548 on underside of mother board tryingto replace caps

    as stated above any one know what this components value is and if a there a way of replacing with something easier as it was my poor soldering skills that caused this bloody shakes
    any advice or should i bin it
    cheers Rob

  2. #2
    adm's Avatar
    Title
    Forum Supporter
    Donated Member
    Join Date
    Sep 2014
    Location
    Southend on Sea, UK
    Posts
    1,636
    Thanks
    62
    Thanked 647 Times in 505 Posts
    Quote Originally Posted by robotman View Post
    as stated above any one know what this components value is and if a there a way of replacing with something easier as it was my poor soldering skills that caused this bloody shakes
    any advice or should i bin it
    cheers Rob
    Can you supply a picture of the damage?

    Is it a surface mount component?
    Xtrend ET10K, 2 x satellite tuners 28.2 (Sky FTA), 2 x hybrid (UK Freeview), Zgemma H9S (satellite)

  3. #3

    Title
    Junior Member
    Join Date
    Mar 2015
    Location
    Derbyshire
    Posts
    10
    Thanks
    1
    Thanked 0 Times in 0 Posts
    Quote Originally Posted by adm View Post
    Can you supply a picture of the damage?

    Is it a surface mount component?
    yes i managed to catch it when i slipped trying to solder for some reason it keeps failing to up load the photo

  4. #4

    Title
    Forum Supporter
    Donated Member
    Join Date
    Mar 2012
    Posts
    124
    Thanks
    159
    Thanked 24 Times in 22 Posts
    Could it be that the file size you are attempting to upload is to big ? I'm not sure but there might be a limit on the file size you are allowed to upload.

  5. #5
    adm's Avatar
    Title
    Forum Supporter
    Donated Member
    Join Date
    Sep 2014
    Location
    Southend on Sea, UK
    Posts
    1,636
    Thanks
    62
    Thanked 647 Times in 505 Posts
    Quote Originally Posted by robotman View Post
    yes i managed to catch it when i slipped trying to solder for some reason it keeps failing to up load the photo
    Without a circuit diagram or reading the value from the device (probably a 3 digit number) its almost impossible to establish the value.

    However, if its close to an electrolytic capacitor (the type you are replacing) then it MAY just be a generic decoupling capacitor and it could be replace with a common value surface mount capacitor or a capacitor with leads. A photo may have given a clue to how the circuit board tracks from this capacitor are routed to other components.

    Using a magnifying lens is there a 3 digit number printed on the the device?
    If you can, try again with photos - perhaps two, one showing a general view and one closer up.

    If you remove the capacitor completely does the box still work. A removed power decoupling capacitor is unlikely to have much effect (or no effect) on normal operation?

    Advice: Never use lead free solder on this type of repair/capacitor replacement. Lead free solder can be the spawn of the devil.
    Use tin/lead solder 60%/40% with flux core as used for decades before the "greenies" without any technical knowledge started making legislation.
    Example
    Code:
    https://www.rapidonline.com/rapid-60-40-tin-lead-flux-cored-solder-wire-30236
    (smaller amount/cheaper for a one off repair available from many Ebay sellers)
    I recommend re-soldering the connections BEFORE trying to remove the component. The flux that helps the solder flow is washed off during manufacture. Re-soldering the joint adds some flux from the new solder and makes it easier to remove the component an/or to use a solder sucker or solder wick


    If, AND IT'S A BIG IF, it is a decoupling capacitor something like this may be OK
    Code:
    https://www.rapidonline.com/suntan-ts170r2a104ksbba0r-0-1uf-10-100v-x7r-2-54mm-radial-ceramic-capacitor-11-3442
    It's not surface mount but for someone not used to soldering surface mount components the leads can be bent to meet the pads on the board and soldered.

    WITHOUT MORE INFORMATION this last part is pure speculation!
    Xtrend ET10K, 2 x satellite tuners 28.2 (Sky FTA), 2 x hybrid (UK Freeview), Zgemma H9S (satellite)

  6. #6

    Title
    Junior Member
    Join Date
    Mar 2015
    Location
    Derbyshire
    Posts
    10
    Thanks
    1
    Thanked 0 Times in 0 Posts
    Thanks for the info I'm still trying to get the photos to upload. I'll get there ,but I think my soldering days are over seem to do more damage these day's. Replaced all the usual suspect capacitors mainly concerned with the low signal issue and then neat'nd up my previous red light repair while I had the main board out .now I wish I had used the easy method and cut the capacitor off the board and soldered it on without taking the board out .oh well lesson learned.
    Time for a new box.
    Can anyone recommend something that won't require capacitors needing replacement as often or is this common place with most receivers.
    I still own a tm9100 that had a capacitor replaced years n year's ago and its still working fortunately. Thank god its all I've got at the moment .

  7. #7

    Title
    Forum Supporter
    Donated Member
    Join Date
    Mar 2012
    Posts
    124
    Thanks
    159
    Thanked 24 Times in 22 Posts
    You could consider one of the newer sat boxes that use an external power supply similar to the ones used with Laptop computers , never had a problem with this type of power supply and the Sat box runs cooler as well, which may go some way towards reliability. an email or phone call to W.o.S should give you a choice of what is available that suits your pocket.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.