2UUL BH31 The Smile Jig for Phone Board and Chip

The 2UUL BH31 Smile Jig is a fixture for phone motherboards and single chips, named for its curved smile-shaped body.

The listing describes a large bearing area that takes different board sizes and chips, an anti-slip base, and a body you can rotate to a better working angle. No dimensions or materials are given beyond "high-strength".

Board and chip work it covers

• A failed chip you are desoldering and reballing.

• Damaged components you are replacing on a full board.

• Short circuits found while testing the board on a supply.

• Tiny parts that shift each time the iron touches them.

Working on the jig

Seat the board or chip and fix it before applying heat. Rotate the jig instead of the board when you need a new angle, so nothing moves out of the clamp. After use, clean off flux and store it somewhere dry, away from dust.

The BH31 is the full-size version; the BH30 Smile Jig Mini does the same job in less bench space, so match the size to the boards you see most often.