ISE 10 W256W (ASKO WM70.1) won’t turn on

[flannel]

Dave, quite a few of them are only stable during the few seconds that the lights are on after wall switch on. I’ve checked the switch and it’s OK at the board. I’ve also checked the transistors and diodes as best I can and they seem ok except 3 of the transistors give no voltage from base to one of the legs. However, as they’re in different places, I presume that is how they are meant to be and it may be caused by the rest of the circuit.
Anyway, thanks for your help, I’ll update if I get anywhere (I’ve asked ASKO and I’m going to try another board).
Kind regards,
Dan

[flannel]

I attached my multimeter to measure the voltage across the on switch and as I turned the power on at the wall, the machine came on and stayed on and is now seems to be fully functional again!
I can’t be sure if it was connecting the multimeter that fixed it or one of the following:

• Measuring the voltage across all diodes (using the multimeter diode setting).
• Measuring the voltage from base-to-source and base-to-collector on all transistors (using the diode setting).
• Measuring the source-to-collector resistance on all transistors.
• Allowing enough time to pass for something to dry out (although there was no evidence of water).
• General movement of cables if there is a broken one (including taking out the motor control board to check the fuse).

Now when I turn it on at the wall, it doesn’t light up until the on button is used.
It’s been an interesting project and I’ve learnt a fair bit – I was very close to giving up and buying a new one..

[electrofix]

if its working leave it and enjoy

dont know what you did either but have a pint and catch up with the washing

Dave

[flannel]

For the record, I got this idea from James360 on electriciansforums.net:

has that machine got a brushless motor if it hasnt check the state of the motor brushes also check the condition of the mains filter as they are notoriously unreliable on that model.

[iadom]

Your machine has a 3 phase brushless motor. I installed and maintained a large number of the ISE 10 machines and never, ever had a single problem with a mains filter. 😉

In fact I’m willing to bet that our UKWG’s store has hardly ever had to supply a mains filter for an ISE10.

[flannel]

Update: I’m pretty sure the problem above was due to the power switch. Recently, the machine has been turning off mid-cycle or quickly cycling on-off when not in use. I cut the switch wires and was able to use the machine normally by ‘hot wiring’ them. I had a good look around for the same switch but couldn’t find it. I ended up with the 13mm long one here: https://www.ebay.co.uk/itm/251356012322
It’s a little short so I straightened the legs and soldered them to a bit of breadboard with minimal engagement and it works fine.

[Author]

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