Brother DB2-B790-3 industrial sewing machine instruction manual needed

SOURCE: Brother Industrial Machine Tension

This is an answer to another person with a similar complaint. Try the suggestion below, it may fix the problem.

From your description it appears that you have tried tension settings on the upper tension control adjustment knob without success.
Check that the bobin tension is adjusted correctly by taking out the bobin complete with the spool.
Pull the cotton thread and it should be a smooth light pressure if the tension is correct. If it is tight to pull or pulls freely then adjust the tension screw which is found on the outside of the bobbin. The screw is very small and requires a minature size screwdriver. The adjustment will only be a slight turn of the screw one way or the other to obtain the correct tension(depending if it was loose or tight).
Once this is set reinstall the bobin and tread up the machine, hopefully with the upper tension set at approx."2" the machine will sew correctly.

SOURCE: Brother DB2-B755-3 industrial sewing machine

I have the manual in pdf form here

http://myweb.tiscali.co.uk/stitches/BROTHER-DB2-B755-MKIII-MANUAL.pdf

SOURCE: MANUAL FOR BROTHER INDUSTRIAL SEWING MACHINE DB2-B755-3

Go to brother.com . From there you will need to enter the model number and serial number to get the file for free good luck

SOURCE: looking for a operating manual for db2 b797

you can asked only the manual of your machine, to the store of brother sewing machine.

SOURCE: I need a pdf manual

You can go to www.brother-usa.com and look for your model but I saw only similar as in DB2-774 and a couple of others under the industrial machines. Maybe they will be close enought to answer your questions. They are free to download, if that doesn't work call Brother at 1-877-276-8437 and I am sure that they can help you locate one. Good luck, you have to wait until Monday to call them.