ASKO w660, no display on LCD panel

[colint]

Hi
(Firstly — thanks again for this fantastic resource, I’ve used it on many occasions, and it’s great!)

We’ve just been given an Asko w660 washing machine that was in use in the house before we moved in. When we tried it for the first time, the LCD panel apparently came on briefly, but then went completely blank, and the machine is now dead (apart from the power on light, which indicates that the user-replaceable fuse on the back is OK). The door catch also seemed to be faulty, so I (power off!) opened the machine up to see whether there was any obvious damage on any of the PCBs or wiring, and to check the door catch. Although it’s an old machine, it seems to be in great condition, and nice to work on. There was no obvious sign of any damage to the main control board, the LCD panel PCB, or the motor control board, and I opened the door switch up and it all looks good. (Mechanical closing mechanism with an electric release to open).
Does anyone have any suggestions for diagnosing the problem please? I’m guessing that it’s probably the power to the main control board, as the machine is so dead?

Thanks!

Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

Check the mains filter and power switch is okay, they would be the first things to check.

K.

[colint]

Re: ASKO w660, no display on LCD panel

kwatt wrote:Check the mains filter and power switch is okay, they would be the first things to check.

K.

OK, thanks. (Sorry, should have read the section of the website about diagnosis first; hadn’t seen that before.)

The mains filter looks fine, no visible damage. Can I test it with a conventional multimeter? (I’m guessing it’s basically a capacitor, and I can’t really test it).

Thanks

Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

Yes, essentially it is a capacitor of sorts.

K.

[colint]

Re: ASKO w660, no display on LCD panel

kwatt wrote:Yes, essentially it is a capacitor of sorts.
K.

OK, thanks. Can I do any kind of testing with a normal multimeter?
Is it possible to bypass it just to check whether that’s what’s failed? (The main switch seems to be OK, I tested it for continuity.)

[kwatt]

Re: ASKO w660, no display on LCD panel

There’s not really a way of testing mains filters unless you know what you’re about with them in all honesty. Often though, when they fail, there is visible signs that they have.

I’ve attached the schematic wiring diagram for the series but I don’t know how well it will relate to your particular model as, it is so old that there’s little documentation available for it now. That would usually mean that it was over twenty years since production ceased at least.

Notably there are also no spare parts listed for the model so we’re sorta flying blind here.

HTH

K.

[colint]

Re: ASKO w660, no display on LCD panel

Great, thanks! I called the local agents, and they reckon that it’s between 10 and 12 years old, maybe it was never released in the UK?
That diagram looks correct, there was a copy tucked inside the machine when I opened it! The connections on the mains filter are numbered according to the diagram, live to 1, neutral to 2. There’s also a diagram on the side of the filter which indicates that 1 connects to 3 and 2 to 4 internally. (Plus a whole lot of other info about the part).

[colint]

Re: ASKO w660, no display on LCD panel

Can I bypass the filter to check whether that’s the problem? Some more info from the filter:
KPL 3008
8058 558
0.47uF + 2 X 4700pf X1Y2 + 2 X 1mH
680kohms 16A 275v 50HZ

EN 133 200
42.00

I can upload a photo if that helps.
Thanks
Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

Not if you don’t want to blow stuff up you can’t. 😉

K.

[colint]

Re: ASKO w660, no display on LCD panel

Oh, OK. I was under the impression that it was just a suppressor, so although shouldn’t be permanently bypassed, it would be fine for testing. I’ve already drained it and removed it, so no danger there anymore.
Thanks
Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

If you want to then you should be able to work out how from the wiring diagram.

However, you are then giving the electronics unfiltered mains voltage, any spikes or irregularities could damage them.

Consider yourself warned. 😉

K.

[colint]

Re: ASKO w660, no display on LCD panel

OK, you’ve convinced me! 😀 I’m starting to doubt that it’s the mains filter anyway. Dunno what else it could possibly be. Presuming there’s some component on the main board that provides 13V for the digital display, if that fails, would the whole machine seem so dead?

Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

In all honesty, I don’t know as we usually don’t go down to board component level.

K.

[colint]

Re: ASKO w660, no display on LCD panel

No problem, probably not worth calling anyone out to look at it if it’s likely to be an expensive repair. 🙁
Thanks for all your help.
Colin

[kwatt]

Re: ASKO w660, no display on LCD panel

At the age of it Colin I personally wouldn’t spend too much on it and, like I said, parts for a machine that age are sparse as I reckon its a good bit older than you’ve been told given that Asko pulled out the UK under the Asko brand in the mid 1990’s.

K.

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