Ironwood Electronics SG-BGA User Manual - Manual (Page 6)

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4. Install the socket top assembly on to the socket base assembly and swivel to lock into the position. If
your socket contains a shoulder screw (silver in color), DO NOT tighten them – they are preset at our
factory. If your socket uses a black oxide socket head cap screw, tighten them until they make contact
with the lid.
5. Turn the compression screw clockwise, until it makes contact with the compression plate and/or the
BGA package.
6. Apply torque specified on page 1 of the part drawing using a torque driver (accurate) or hex key
(approximate) supplied with socket. Using hex key, turn an additional 1/8th to 1/4th of a turn.
7. The sockets between 19mm and 27mm will include hex nuts and washers for optional use without the
backing plate, it is recommended that the backing plate be used however.
MLF (QFN) Socket Assembly:
Refer to figure 5 for graphical illustrations.
1. Install the socket base assembly on the target PCB with the base mounting hardware (provided).
Because of the asymmetrical location of the tooling holes, the socket can be assembled onto the target
PCB with only one orientation (rotation).
2. Place the IC package into the socket using either a vacuum pen or tweezers. MLF type packages pad
side down. NOTE: The package orientation on the target PCB is critical.
2a. Center small IC packages inside the IC guide using tweezers. Use a microscope if needed.
2b. Press on top of the IC with tweezers. Begin by pressing on the area close to the center of the IC. Then
press slightly on all four corners of the IC. NOTE: If you are experiencing problems pressing the IC
package into the IC guide, it is an indicator that the IC package is not properly centered. Re-center
package if necessary.
3. If an IC compression frame (optional) is supplied, place it over the MLF package. Place the
compression plate on top of the IC package.
4. Install the socket top assembly on to the socket base assembly and swivel to lock into the position. If
your socket contains a shoulder screw (silver in color), DO NOT tighten them – they are preset at our
factory. If your socket uses a black oxide socket head cap screw, tighten them until they make contact
with the lid.
5. Turn the compression screw clockwise to the specified torque called out on page 1 of the drawing. Be
careful not to over-tighten compression screw. Over-tightening will damage the elastomer. NOTE: the
torque value on page 1 of the drawing is the maximum recommended torque value. Typically, the
socket should work with smaller torque settings.