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Tooling up for SMT

Discussion in 'Electronic Repair' started by Z, May 16, 2004.

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  1. Z

    Z Guest

    I'm considering tooling up for surface mount devices and
    How much is this going to cost?

    I'd be doing it is stages .
    Soldering de-soldering of discrete devices then for instance tool up
    test gear probes then chip probes and blocks.

    Anyone tooled up for surface mount care to go through the initial kit
    they got, capital outlays, how much it is used and if it has been
    profitable or not. What is considered essential kit to start with?
     
  2. David

    David Guest

    Individual resistors/capacitors have special sized notched tips for removal.
    A good set runs under $500 total including the custom sized tools to
    actually hold the devices in place for soldering.

    Large flat pack ics most certainly require something called a Hozan (or
    other hot air devices). The Hozan itself ran around $15,000 with each sized
    tip in the few hundred dollars. All US$.

    For very light duty surface mount repairs on low density boards, there is
    something called Chip-Quick which is useful, but takes some practice to use
    and a complete cleaning and retinning of the board is required after the
    part is removed.

    Unless you have manufacture support to order the surface mount ics at a
    price that makes economic sense for the consumer, many custom ics simply are
    not available by any other source in single quantities. It took over 6
    years just to break even on the Hozan, this is at a shop that does a gross
    of just around $500,000 in total repairs per year. Reasons are many: 1.
    the number of declined estimates for repair due to the decreasing cost of
    replacement items. 2. the unavailability of the custom parts after the
    units are more than 2 years old. 3. On the warranty repairs, the low
    manufacture reimbursement rates. 4. The simple lack of numbers of the type
    of failures that required the use of the Hozan.
     
  3. Z

    Z Guest

    Thank you for saving me going down that road.

     
  4. N Cook

    N Cook Guest

     
  5. N Cook

    N Cook Guest

    And a few extra points
    If you can't get the tugging wires under the IC then pass
    under a few pins at each corner.
    Because this tugging frees the IC at the earlies moment the solder
    on the board is not fully melted and leaves a profile for localising
    the new IC in place and then solder pin by pin
     
  6. Ampdoc

    Ampdoc Guest

    Hakko makes a tool, the Mach-FP which is inexpensive for SMD removal. Some
    practice is required to become proficient with this tool, however I've been
    using one for almost 7 years now and haven't damaged any PCB's.
    http://www.hakkousa.com/products.asp?PID=Mach-FP&page=1
    Handpiece with the tips runs about $250 USD. SMD components can be
    reinstalled with a standard soldering iron easily with the appropriate
    technique.


    --
    Jammy Harbin
    J & J Electronics, Inc.
    227 S. 4th St.
    Selmer, TN 38375
    731-645-3311
     
  7. pj

    pj Guest

    Hi!

    I've used JBC products for PC mainboard repair, a lot cheaper than
    others. Used it for QFPs and PLCCs. It costs US$ 2,390 with all
    accessories for the JT7000
    (http://www.howardelectronics.com/jbc/jt7000.html) . I've evaluated
    other brands, they don't come close with ease of use. A medium sized QFP
    can be removed in 20 secs! Quick removal translates to less PCB/chip
    damage.

    Removing the SMT part is the easy part, profitabilty is another.

    Regards.
     
  8. Z

    Z Guest

     
  9. N Cook

    N Cook Guest

    If you mean the anti-acidic treatment.
    Yes seems to halt the rot, reduces the browning but
    perhaps black print is less black and the wet process does ruin any binding.
    As confirmation I still do it now and again to different books

    electronic hints and repair briefs , schematics/manuals list on
    http://homepages.tcp.co.uk/~diverse

    Nigel, Diverse Devices,Southampton, England
     
  10. N Cook

    N Cook Guest

    I just tried some universal indicator for the pH of this first treated
    Brimar valve databook,3 years ago now, is still about pH 9.5 The paper feels
    more supple ie less brittle than before treatment, no trace of continued
    edge fraying.
     
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