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Big chip (like DCJ11) insertion and removal

reinhardtjh

reinhardtjh

Experienced Member
Joined
Jan 15, 2014
Messages
206
Location
Fort Worth, TX
So I picked up the KDJ11-B boards from Ebay (https://www.ebay.com/itm/225598765550) that people have been talking about. Now it's time to install the DCJ11 CPU chip. That sucker is big! What techniques to you all use to insert it without cracking it in half? It is just a matter of going slow and as evenly as possible?

Also removing it if necessary?
 
No special technique.
Just press on both sides with circa the same force and that is it...
If one want's to there is f.e. "Kontakt Gold" spray, with that it slides more gently into the socket.
There is more risk to get eventually a pin damaged or out of angle than breaking the ceramics !

For removing i have some kind of chip removal tool, but a normal flat screwdriver also does it.
Chip removal tool looks like this one here:
www.startools.de

Wera Elektronik-Ausheber 1429

Elektronik-Ausheber - Runde Klinge - Nicromatt - Black-Point-Spitze - Kraftform-Micro-Griff (mit Kraft-, Präzisions- und Schnelldrehzone) -…
www.startools.de www.startools.de

addendum: with both sides i mean circa in the middle of the two chips, eventually with more orientation to the smaller sides...
 
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good luck, hope you also got a good board. The pins are pretty straight, if you try and put one whole row in and pull it over to the other side you run the risk of snapping one since its probably won't line up. What i did slowly roll it in from left to right rather than one whole side top to bottom, if that makes sense. I wouldn't take the 74ls series approach and try to bend the pins over the table, Take your time and play with it a bit before the final pressdown :)
 
Gentle patience and evenness is the key for chips both large and small. For removal, I've long used a pair of flathead screwdrivers, one on each end, to carefully work chips out (start by turning the screwdriver around its normal axis, then when the chip is loose you can use it as a lever.) But you do have to be careful how much force you're exerting on the socket itself, with these aging plastics...
 
When I get nervous I use a suitably-sized block of wood to distribute forces evenly along the length of the chip. As I have a big wood scrap pile finding the right-sized piece isn't a problem :-}.
 
Of course, you could purchase a proper chip removal tool (for that half of the job). They are not that expensive. It will be invaluable for other work as well.

When Maplin's closed down in the UK I bought an IC pin straightening tool and an IC extractor. I should have bought these many, many years ago rather than trying to bend the IC pins straight on the edge of a table and using screwdrivers... Of course, the pin straighter is no good for a J11!

Dave
 
Thanks to all that replied. I went 4 for 4 in successfully inserting DCJ11 chips and 1 for 1 in removing one. Making sure the pins were lined up and correctly in the socket pin holes seemed to make it easy. And carefullly pressing along one side evenly.
 
daver2 said:
Of course, you could purchase a proper chip removal tool (for that half of the job). They are not that expensive. It will be invaluable for other work as well.

When Maplin's closed down in the UK I bought an IC pin straightening tool and an IC extractor. I should have bought these many, many years ago rather than trying to bend the IC pins straight on the edge of a table and using screwdrivers... Of course, the pin straighter is no good for a J11!

Dave
Click to expand...
I have never found a decent IC extractor for larger DIL package ICs (32 or 40 pin).
Those V shaped bent steel gadgets are useless in my opinion. They are barely ok for 16 pin DILs.
I have much better control and success with two flatheaded screw drivers.
I would love to find something better.
 
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