840z Zif Adaptor Problem


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  1. #13
    Join Date
    Oct 2004
    Location
    North Norfolk UK
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    146


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    Default Happy New Year Everyone

    I have dug out an melabs zif convertor, I personally use the RS232 serial melabs programmers, and am not familiar with the epic programmer.

    I have taken a couple of photos
    <img width="342" height="256" src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2225&stc=1&d=119921565 3"/> <img width="371" height="278"src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2226&stc=1&d=119921565 3"/>

    As can be seen the tracks on the board are fairly straighforward but more importantly they are also substantial for the task, the PCB is also good quality, I would suggest that the chances of the board itself failing, probably should be ignored; Likewise the zif socket. In any event the continuity check would have revealed any of the five connections failing.

    Melabs do not use boxed headers on either this module or the programmer and I have several times misaligned the IDC socket onto the pin headers as supplied. When this happens I curse them for not providing a boxed header, alternativly I am pleased as most of my connectors I make up and then I do not have to worry about the orientation when clamping the socket.

    The led on my serial programmer is a tri-colour, green when power on and red when programming, am I correct in assuming that yours is red all the time you are connected, this would possibly suggest that the socket indeed might not be correctly aligned.

    Just another thought (rethink) perhaps there could be residual conductive material floating about inside the zif.
    Am now considering how the masking is done during wave soldering on a zif, is it a post assembled component. I regret that the Zif is about to become discombobulated shows how bored I am at Christmas
    Attached Images Attached Images   
    Last edited by Darrel Taylor; - 1st January 2008 at 19:37. Reason: images

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