These instructions apply to PFAFF 1475 CD. They may also work for other machines.
If you have some advanced electronic repair skills and tools, check the following:
For 220 Volts models - there is a fuse next to the power input, make sure it is good. There is no such a fuse for 120 Volts model.
If the fuse is Okay, you have to get access to the main circuit board by removing the bottom cover.
Check the primary on the transformer for 120 V AC (220 V AC respectively). Check the secondary side for 5 V AC (luminescent display), 9 V AC (turns to 5 V DC by rectifier, 4700 micro farads capacitor and a 5 V regulator STI L387A) and 28 V AC (turns to 35 V DC by rectifier and 2200 micro farads capacitor.
Pay attention to two soldered round fuses in series with the secondary 9 V and 28 V - both should be good. On the big capacitors you should have 9 V DC and 35 V DC.
Common symptoms for bad small 22 micro farads capacitors next to the some of the IC's - there are 5 of these: These capacitors are in parallel with 5 V DC.
## All of the LEDs light up but the display is blank
## All of the LEDs light up, the display is blank, and after a minute no LEDs at all
## No LEDs nor display.
Replace ALL five 22 micro farads capacitors using a good desoldering pump or desoldering station!.
Enjoy your resurrected PFAFF 1475 CD machine!!!
I just did this procedure on my aunt's one (Made in West Germany around 1990).
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it show a part of the problem says a battery went flat,,was there any corrosion in the place you put the battery. if there was corrision it could have shorted something in the machine it's very posssible that something has gone wrong with the computer part of the machine
are you getting a visual signal on your LED display ? have you tried turning the machine off & waiting a few seconds & turning it back on again have you tried cleaning the bobbin area for loose threads & lint? how many beeps are there? do you have a instruction manual for the machine? if not singer has one for free pdf download
Go to the singer website
Go to the home page
Go to customer service--click on it--it will show a small menu--click on instruction manual
In the box put the model number (example 7422 ) & click search
Go into the Service Menu by pressing and holding the reverse feed button and the sensor foot pivot button while switching the machine on. The display screen will now show Menu 1. On the third row down touch MENU button. The display changes to show Menu 2. At bottom of screen you will now see ON-TIME - SEW-TIME - EMBR-TIME. I would not recommend touching any other buttons or settings. Switch the machine off and restart as normal.
You definetly need to take that machine to a repair shop. The thread wrapped in the top of your machine could be the reason for your bind. To fix that properly the top end of the machine needs to be removed to make sure all the thread is removed. The problem with the display could be a number if issues. From a loose cable to needing a new screen. Don't try to run that machine, if you do you will be overloading the drive system and could possibly damage it further.
sounds like circuit board has gone bad. If you are the original owner and purchased from an authorized Husqvarna Viking dealer it may still be under warranty. There is a 1 year warranty from date of purchase. Contact your local authorized Husqvarna Viking dealer for service or have them send it to Husqvarna Viking (SVP) Technical Service Department for repair. You can find authorized dealers near you from the Husqvarna Viking website - http://www.husqvarnaviking.com/us
Presumably you have turned the machine off, and then back on again to, in effect, reboot the machine's computer? The only other suggestion I can think of, is to ensure that the bobbin winding post is FULLY to the left when you want to sew. It may be worth looking around the bottom of the winding post to see if there is any build-up of thread (or other stuff) that is preventing the post going to the fully-left position.