"The most comprehensive training and resource website for a BERNINA mechanic"
Rogerg Reldis
How to replace the needle holder when the needle holder screw is broken
There are times when the tip of the needle holder screw breaks off and you cannot insert a new needle or tighten the needle.
830/880, 710/750/780/740/770/790
Needle bar,
Virtuosa / Activa Series replace timing belt
I will show you how to replace the timing belt and make the necessary adjustments afterward.
150/160/130/140, Classic/Virtuosa line, 125/220/230/325/335
Driving mechanism / Timing Belts
How to replace the black stem in a 8-series bobbin case
The bobbin won't hold in the bobbin case correctly. Something feels funny. Here I show you how to replace the black stem in the bobbin case.
830/880
Bobbin case
7 series replace the touchscreen
How to replace the touchscreen in a 7 series machine. The touchscreen is embedded in the front cover so it is a different procedure than all other machines.
710/750/780/740/770/790
Screen/ LCD / Touchscreen
Diagnostic: 630-640-440-430-450 etc. Error message lost angle signal
The error message "Lost Angle Signal" can have different causes. I will show you how to troubleshoot it on those models.
630/640, 440/430/450/etc.
I do not know what part of the machine is the problem, Sensors: All and any sensors in all the machines, S-Print, Main print, Base print, CPU, any print
B9 Hook machines. Machine only stitches a few stitches then stops feeding
After a few stitches the machine gets stuck and will not feed the fabric.
New Gen 535/570/590/500, New Gen 435/475QE/480, 710/750/780/740/770/790
Feed dog, Driving mechanism / Timing Belts
Diagnostic 7 and all New Gen 4 and 5 cutter not initialize
You push the cutter button to cut the thread but nothing happens. The white part from the clutch is moving but does not hold in place long enough.
710/750/780/740/770/790, New Gen 535/570/590/500, New Gen 435/475QE/480
Clutch mechanism for thread cutter, Thread cutter
B9 Hook machines Lower main shaft replacement
Replacing of the lower main shaft on a B9 hook machine. This video shows you all the adjustments from the knife, the clutch mechanism, and the hook!
710/750/780/740/770/790, New Gen 535/570/590/500, New Gen 435/475QE/480
Driving mechanism / Timing Belts, B9 Hook, Clutch mechanism for thread cutter, B9 Hook
8 Series Bobbin winder not working
The bobbin winder is not working. Here I show you how to troubleshoot and find the problem
830/880,830/880
Bobbin winder
Tune up on 5 or 4 series machines with B9 Hook when nothing is wrong with the machine!
How do I make a tune-up when nothing is wrong with that machine.
New Gen 535/570/590/500, New Gen 435/475QE/480
Service the entire machine
Replacement of lower main shaft / Hook driving gears
The replacement of the feed dot shaft/hook driving gears. This video will cover all the steps from taking it out to all adjustments putting it back together.
440/430/450/etc., 630/640, 550/530/570/580, 330/350/380, 125/220/230/325/335
Driving mechanism / Timing Belts, Hook /Sensor/Mechanism/gear/timing, CB Hook, Feed dog
Diagnostic: 630-640 440-430 etc. stitch width motor not working
The stitch width motor on this machine has a problem. I will show you how you can diagnose the fault without having any parts in stock to test the machine.
630/640, 440/430/450/etc.
Stitch width /mechanical / electronic,
1000 Series every so often machine will not run
Every so often when you press the foot control the machine will not run. There seams to be no particular reason why it is doing this.
1130/1120/1230/1260/1530/1630/1090/1080, 1030/1031/1020
Foot control, Power cord, Foot Control Cord etc.
Diagnostic: 8 series: Upper thread tension is not threading correctly
The lever that should thread the check spring on the tension unit is stuck. How can we fix this
830/880
Tension unit
8 Series Presser foot bar sensor message
A presser foot bar message on the screen as soon as you turn on the machine
830/880,830/880
Presser foot mechanism / presser foot / Kneelifter
L 890 replace nozzle that threads the loopers.
The thread does not automatically thread like it should.
Overlock L890/L860/L850
Air threading
7 Series machine- Replace presser foot bar rack
You have this "clicking" noise when you lower the presser foot, or when the bar comes up you have this strange noise- more than likely your presser foot bar rack needs to be replaced.
710/750/780/740/770/790
Presser foot mechanism / presser foot / Kneelifter
630-640 440 etc Thread will not pass between driver and hook
This machine will not sew because there is no gap between the hook and the driver.
630/640, 440/430/450/etc.
CB Hook, Hook Driver
Activa Line: 220/230 etc. Reverse button does not always work
Reverse button only works when pushed at one spot. If you push button at the bottom machine will not go in reverse.
125/220/230/325/335
Reverse Stitches/Reverse cam, Buttons/Push button all machines
1000 series needle stop and stitch width not working
Needle stop is not working correctly. Stitch width is not working and needle is just jumping
1130/1120/1230/1260/1530/1630/1090/1080
Needle stop / Stopmatic, Stitch width /mechanical / electronic