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Circuit Board Module Replacement Tool

IP.com Disclosure Number: IPCOM000073526D
Original Publication Date: 1970-Dec-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Baweja, AS: AUTHOR [+2]

Abstract

In some circuit card arrangements it is difficult to replace a module on the card because of close nesting with adjacent elements and inaccessability of the reverse side of the card. A tool which applies heat to the solder joints of one module preferentially while applying a gentle force on the module facilitates this operation.

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Circuit Board Module Replacement Tool

In some circuit card arrangements it is difficult to replace a module on the card because of close nesting with adjacent elements and inaccessability of the reverse side of the card. A tool which applies heat to the solder joints of one module preferentially while applying a gentle force on the module facilitates this operation.

Module 10 is mounted on circuit board 12 by solder connections 14 between contact pins 16 of 10 and holes 18 in 12. Adjacent modules or spacers 20, 22 and inaccessability of the lower side of 12 prevent direct application of heat to solder 14 to reflow the solder for module replacement. A tool having a nozzle 24 directs hot air 26 over an air deflection portion 28 of the tool which acts as a protective shield for 10. A pair of depending baffle portions 30, 32 channel the hot air 26 down along the sides of 10 to the under portions of 10 adjacent pins 16, between 10 and 12. This causes reflow of solder 14, loosening the connection between pins 16 and board 12.

This heating arrangement can be utilized in both the extracting and insertion phases of the module replacement. For the extraction task, baffles 30, 32 are formed with cantilevered spring portions 34, 36 and hook parts 38, 40 which provide gentle lifting force to module 10 as heat is applied to reflow the solder, so that the module is lifted out of its connection with board 12 as soon as the solder connections are free.

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