Change light bulb in Brothers LS 1520 - Brother LS-2125 Mechanical Sewing Machine

SOURCE: brothers sewing machine ls 1520

I hope this is your machine, check it out

http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_LS_1520_EN_270.PDF

ACCESSORIES
1 Buttonhole foot (1 pc.)
2 Zipper foot (1 pc.)
3 Button sewing Foot (1 pc.)
4 Needle set (regular single needle No. 14) (3 pcs.)
5 Twin needle (1 pc.)
6 Bobbins (3 pcs.)
7 Darning plate (1 pc.)
8 Screwdriver (1 pc.)
9 Extra spool pin (1 pc.)
Parts code for zigzag presser foot: 138135-051
Foot controller: X57319-051 (110/120V Area)
XA6422-021 (220/240V Area)
XA6412-021 (U.K.)
XA6414-021 (Australia, New Zealand)
The above accessories are stored in the accessory bag inside the
extension table. These accessories have been designed to help
complete most sewing tasks.

SOURCE: i have the brothers LS-1520 the needle wont stay up even after i adjusted the screw.

sounds like the screw has stripped out and you need a new one. or
it could be the needle clamp that is stripped out, it would be a good
idea to have the machine checked to see which one it is.