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Desoldering eeprom - Hot air temperature

Discussion in 'Troubleshooting and Repair' started by MrWho, Dec 16, 2011.

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  1. MrWho

    MrWho

    9
    0
    Dec 16, 2011
    Hello,

    What hot air temperature I should use to desolder SMD eeprom memory soic 8 ..And not damage it ?

    Thank You
     
    Last edited: Dec 16, 2011
  2. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    Hi MrWho,

    The t° can be found in the solder manufacturer datasheet however for such kind of component hot air is probably not the best solution (it takes too long time for the heat to melt the solder). better to (without dedicated reworking station) :
    * made a big fresh solder blob on one row that shortcut the 4 pin's
    * heat the blob and carefully raise the package with an adapted tool till the pin's are isolated from the pads. You must ensure a good melting to avoid any pad's damage when pulling !!
    *made a big fresh solder blob on the other row and kick the board a bit to let the eeprom fail.
    *clean the pin's and re-align them

    If the eeprom content is very important you can maybe try to read it before desoldering for backup purpose. You must be fast to desolder, so maybe you can train yourself with
    any dead board.

    Olivier
     
  3. MrWho

    MrWho

    9
    0
    Dec 16, 2011
    Hello,

    Sorry I wasn't clear by hot air I mean hot air rework station.
    Not hot air gun...

    Thank You
    Cheers,
    Kris
     
  4. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    MrWho,

    OK with a hot air rework station chose the adapter they well surround the component and use a solder flux to speed up the process. being fast and backup the content are still applicable :)

    Olivier
     
  5. Redeye02

    Redeye02

    10
    0
    Dec 15, 2011
    Here's an interesting method I used to replace a mosfet.

     
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