top of page

Welcome Visitor!

Search all the videos a paid member can access but you will not be able to view them!

Search

7 Series: Replacing the main shaft and bushing

I will show you what it takes to replace the main shaft and bushing on a 7 series machine

710/750/780/740/770/790

Main Shaft

How to make a tune-up 150/160/130/140 etc 170/165

How I make a tune-up on those models of Bernina's when nothing is wrong with the machine

170/165 Artista, 150/160/130/140, Classic/Virtuosa line

Service the entire machine

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,

330/350/380 replacing hook driver tooth rack

A common problem on those machines. I will show you how to replace the tooth rack and how to make the hook adjustment afterward

330/350/380

Hook Driver, Hook /Sensor/Mechanism/gear/timing, CB Hook, Driving mechanism / Timing Belts

The stitch width or length indicator jumping or not working when turning the dial

You turn the dial for the stitch width or length and instead of being a smooth changing it is either jumping or not working at all.

200/730, 170/165 Artista, 180/185 Artista, 630/640

Stitch length /mechanical / electronic, Stitch width /mechanical / electronic

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

790Pro or any other B9 hook machine out of time

A 790Pro only a few hours on it is out of time. Once again I show you how to check the B9 hook system and how to adjust it!

710/750/780/740/770/790, New Gen 535/570/590/500, New Gen 435/475QE/480

B9 Hook, Hook Driver, Driving mechanism / Timing Belts, Hook /Sensor/Mechanism/gear/timing

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

© 2025 by BerninaMechanic.com.

bottom of page