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PostPosted: Sun Jul 17, 2016 1:53 pm 

Joined: Tue Feb 03, 2015 6:57 pm
Posts: 3588
Location: Low DOS
For socketed ICs:
For dip ICs. Slowly slide a #2 standard (slot) screwdriver into on side level with the base of the IC. Gently lift the end by pushing the screwdriver DOWN.
Remove the driver and do the same on the other side. Now you can 'pop' the IC out with no issue by sliding the driver under it and pulling UP

For old (non zero insertion force {ZIF}) CPUs
Using a #1 standard driver inset the the driver 1/4 from the left corner on any side. Very gently twist the blade between 1/8 and 1/4 turn counter clockwise.
Repeat for the other 3 sides
Now go back to the first side and place the driver in the same distance on the opposite edge. Turn the driver gently 1/2 turn clockwise
Repeat for the other 3 sides
Now grab hold tightly on two opposing sides and YANK the CPU straight up.

For ZIF sockets
Pull the side lever up and the chip is free
The only ways you'd have an issue on these are as follows
A broken or missing lever. Find the levers fulcrum point where the base (attached) point was. Insert a number 1 or number 0 standard driver into the spring slot. Which ever fits better depending on socket size. Pentium pro and most sparc and Motorola sockets need a number 2 driver. The rare IBM mc sockets require a #4
Very slowly and gently turn the driver counter clockwise. Your actually winding a small Spring so turn with gently but constant force. You will need to crack the socket edge in the process so keep that in mind, like Padme, aggressive negotiations!
A 'Frozen' socket.
If after releasing the bar it doesn't come out. Start by removing the bar. In its vertical position pull very hard at a 90• angle away from the sockets and snap it loose. This leaves the pins free.
The pins have tarnished and become lodged inside. Do the same method as above for nZIF sockets. If you can't get at all four sides then use the same method with considerably more force against the board between the board and socket, removing the sockets itself. You will break the board. You'll still get the correct rate for the CPU but the board is now peripheral.
Soldiered ZIF PGA sockets; very rare, only seen in ITX boards for industrial use. Your SOL so remove the socket as above.

Soldered chips.
Come in 3 forms
Soldered pga: remove the socket, as above
Soldered SGA (studs, or half length pins). Remove the socket as above
Bag, for ball grid array. These have two types. Flat packs have a controller built in and go as green fibre with metal. Ceramics go as pinless if if has a metal spreader or as IC if it does not. Black non-qfp chips are always IC.
Use a heatgun at between 600-900•. The darker the green the lower the temperature.
These are rarely worth remove. A full motherboard with a soldered CPU will go as small socket ( large socket for laptop and pre486 era boards. Leave them alone.
Exceptions: gold cap CPUs, go in in IBM/Via gold caps. DLP chips go in the respective DLP category. QFP controllers on otherwise low grade boards are worth removing, boards such as older A/V equipment. A QFP on a midgrade boards bumps the board to peripheral (within reason) so leave it alone.

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-- my grades are my own and do not represent an offer from boardsort, nor are they guaranteed. Please keep that in mind.


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