Can i get a diagram of how to thread my brother LS2125 sewing machine. It was given to me but has no manual. Thanks.

try these links for parts
http://www.sewingpartsonline.com/brother-ls2125i-sewing-machine-parts.aspx

http://www.sewingpartsonline.com/brother-ls2125-sewing-machine-parts.aspx

loosen the top thread tension one number or letter at a time till the
thread moves more smoothly thru the machine

Get a free copy of the manual at www.brother-usa.com under customer support for home sewing and embroidery. It will tell you everything you need to know, save it to your computer and then you can also enlarge the diagrams to see better.

I look at my manual & at the back of the of the thread take up lever ,where the thread guide is behind the machine on the top left hand side is a screw, just unscrew it take off the face plate & change the bulb & put the screw back in

Look in your owners manual, on page 42 they have an excellent diagram, it is hard to explain to do without pictures so I advise you to refer to your manual. If, you do not have one, go to brother-usa.com and you can download one for free on their website under support

Are u certain u have the tension set correctly for the type material u are sewing?

Page 21 Of The Owners Manual Download able Here
http://www.brother.ca/en/products/pdf/manuals/LS2125-UG.pdf


Decrease the thread tension by turning the dial
to a lower number. If the result is still not satisfactory,
then adjust the bobbin thread as explained below.

Increase the tension in the bobbin by turning the screw with a small screwdriver in a clockwise direction. However, do not turn the
screw more than one full turn.
Remember to return the screw to its original setting before
starting your next project.

try this
on your browser search bar type in---user manual for pacesetter vx2051 sewing machine--- and see if there is a web page with a pdf version down load

Their is a diagram in your manual. if you don't have one here is a link. http://gotoes.org/sales/BrotherSewingMachineManuals/ViewInfo.pl?Brother=1&Sewing_Machine_Model=LS_2125

You will start from right to left then work down.

Don't go directly from the thread spool to the bobbin.
You have to go via the thread quide, (near the end of the head at left side) and under the small roller.

Pass your thread to the bobbin turn your thread 3 turns to the right, clockwise,
then pass the end of the thread, under the coming thread and give it another 3 turns to the right.
For better results, always remove old thread from bobbin before filling it up.
Push the thread winder lever to lock the bobbin.
Start winding slowly. If the thread is loading in the down position,
put your finger under the thread between the bobbin and the the thread quide, untill you see that the thread is feeding evenly.