Sewing machine model 385-19050 thread caught inside between guide 2 and 3

It could be the top thread is the problem. Might try removing all the thread. Consult the owner's manual for threading instructions. RAISE the presser foot BEFORE threading the upper thread so the thread will seat properly in the tension disk. Re-thread from the beginning carefully following the instructions--do not miss any spots or thread guides.

If top thread is still creating a mess of loops under the fabric, try tightening the upper tension. The tension is ideal when both upper and bobbin threads meet in the middle of the fabric.

...

Have you changed the needle lately

Have you checked your tension for the thread and material? Is the same thread and in the bobbin too?
If you can tell where i t,is getting caught, does this not solve your problem? Is the plastic thread feeder, rough? you can use very fine emery paper to smooth it out. :-)

Try these suggestions
1. Change the needle--use a needle that's for the fabric being sewed
2. Rethread the machine--top --make sure to use every thread guide
3. try a different bobbin--make sure bobbin is inserted correctly into the bobbin case, & make sure the bobbin is turned the correct way in the bobbin case
4. make sure the thread has not come off the thread take up lever
5. Clean under the needle plate & in the bobbin area for lint or threads

check the upper thread tension
make sure all the thread guides all used- & that the thread is not hanging up some where on the machine
check the top thread tension dial to see if there is any thread caught in it
change the top & bobbin thread- make sure the thread is not knoty or old

Hello

Place spool of thread on the spool pin, found inside the carrying handle on the top right side of the machine facing the back.

Lead thread through the upper thread guide, located just beyond the machine's handle.


Lead thread through the second upper thread guide, found a few spaces to the left of the first upper thread guide mentioned in Step 2.

Bring thread around the second upper thread guide down into the thread guide.


Lead thread toward you down through the tension discs.

Continue to pull thread down through the ****. Forming a "U" shape, bring thread back up the left side of the guide, catching the check spring as the thread moves back up through the guide on the left side.

Bring thread up to the take-up lever and insert thread through the eye of the lever in a right-to-left motion.

Lead thread downwards, slipping it down through the horizontal thread guide.

Guide thread through the wire thread guide that is attached to the needle clamp.

Insert thread through needle from front to back, pulling thread four to six inches to create a thread extension. The machine is now threaded.

Hello

Place spool of thread on the spool pin, found inside the carrying handle on the top right side of the machine facing the back.


Lead thread through the upper thread guide, located just beyond the machine's handle.


Lead thread through the second upper thread guide, found a few spaces to the left of the first upper thread guide mentioned in Step 2.


Bring thread around the second upper thread guide down into the thread guide.


Lead thread toward you down through the tension discs.


Continue to pull thread down through the ****. Forming a "U" shape, bring thread back up the left side of the guide, catching the check spring as the thread moves back up through the guide on the left side.


Bring thread up to the take-up lever and insert thread through the eye of the lever in a right-to-left motion.


Lead thread downwards, slipping it down through the horizontal thread guide.


Guide thread through the wire thread guide that is attached to the needle clamp.


Insert thread through needle from front to back, pulling thread four to six inches to create a thread extension. The machine is now threaded.

check your needle to see if it's damaged
some sewing machines do this when the upper thread comes off the thread take up lever
make sure thread is thread thru all the thread guides
check bobbin area for lint & loose threads

You might take a look on ebay item with bernina 700d/800dl instruction manual

Solution taken from "Handbook for Huskylock Sewing Machine Models 1001L/1000L/1000"

1. Raise the presser foot by using presser foot lever. When the presser foot is raised, the two thread tension discs in the thread tension control panel are released so that thread passes freely between them. Otherwise thread tension may not be correct.

Important! When threading the needle, always be sure to lift the presser foot lever, and also take care to thread in the proper order.

Threading order:
1. Upper looper thread (green)
2. Lower looper thread (blue)
3. Double chain stitch looper thread (purple) in case of 5 thread stitch or double chain stitch
4. Right needle thread (red)
5. Left needle thread or double chain needle thread (yellow)

Caution!
Because the left thread tension dial (yellow) is used for either the left needle or the double chain stitch needle, these needles will never be used at the same time.

Upper looper (green) sequence:
1. Thread holder (silver triangle openings attached to thread holder stand)
2. Thread guide (flat silver clips just behind thread tension disc)
3. Thread tension disc (circular knobs with numbers for tension setting)
4. Pull thread around upper looper guide and upper looper
5. Pull thread into hole of upper looper

Lower looper (blue)
Repeat 1, 2, 3.
4. Pull thread around guide (see color coded chart inside front serger cover).

Easy threading mechanism (for lower looper)
1. Pull out the lower looper threading lever
2. Thread the lower looper and position the thread on hook of the lower looper
threading lever.
3. Push the lower looper threading lever back to its basic position while
holding the end of the thread.

Caution:
When returning the lower looper threading lever, always make sure that the two
blue triangle marks (directional arrows) meet each other.

Right needle thread (red)
Left needle thread (yellow)
Important: Thread the needles after threading of lower looper and upper looper.
First raise the presser foot lever, and then thread the needle threads in order shown in color coded thread guide.