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Looking for any help with diagrams, schematics etc for this machine. Diagrams for the speed control and timer are the actual problem. Any links or mails welcome. Ta
Re: AEG Lavamat 528 (605 632 206) timer problems
Andy,
Wiring diagrams and schematics for AEG are rarer than hens teeth and not available to the general public anyhow.
Specifically what is your problem, maybe we can help 🙂
MartinThanx 4 the response.
The main motor armature was rewound due 2 a short on one of the windings and since the motor was reinstalled the following is happening: In wash, the motor ramps up 2 beyond normal wash speed in both directions, which is unusual since the wash speed is usually attained quickly; and there is no motor activity for the spin cycles.In 17 years I have never heard of an AEG motor being rewound. Sorry, but it just don’t happen. So, some sort of recon motor fitted, the fault you are describing is a speed control fault.
Either the “tacho” unit is not sending a signal back to the electronics, or there is an electronic failure in the PCB. Possibly an earth leak from the motor itself. A few things to check out then. If you have any doubts about your own abilities check in the Directories setion for a local UKW engineer or pop your postcode up in here and someone will pick up on it.
Whatever you do, PULL THE PLUG FIRST!
Final point – whilst these machines were absolutely first class it now rather elderly – don’t go mad with what you spend on it.
Regards,
Penguin45.In Africa anything goes… have 2 check it out myself as I am the only local mad enough 2 repair other peoples appliances. Expense being the customer’s concern and reason for delving in2 finer component checks that may help with a remedy. I’m not 2 hot on the electronic side, yet most brands r going that way. Electromech… keep them coming.
Thanks for the advice, will keep trying. Any idea what type of signal I should b getting form tacho, ?It’s on the end of the motor. The coil should read circa 2k ohms, and the little centre rotor should be magnetic. It should generate low voltage DC current. Hook up the test meter and spin the motor over on the drum pulley – you should get a reading – not sure what; never tried it. Pull the plug first though!
Where are you BTW? Can’t think of another poster from Africa.
Good luck,
Penguin45.From Namibia. I ran the machine and measured the tacho output whilst in circuit with the PCB and I get around 2,3VAC up to 8,5VAC as it accelerates in the wash mode. I think the problem is definintely on the PCB somewhere. I have afeeling it is a diode or a cap that’s gone. Found some dope on the speed control IC used and will do more tests 2morrow. Measured the motor field coils at 1,2ohms and across the rotor (stationary) 2ohms. Do these sound about right for that type of motor?
Yeah, low ohms across armature and field is typical with a brush motor – don’t forget to check for earth leakage. If motor speed is just running away you’re looking at a probable triac failure (the 3 leggedy beastie on the heat sink) rather than other components. It acts as a “chopper” to cut the tops and bottoms off the AC supply, thus regulating the voltage supplied to the motor. They can fail closed (no motor) or open (SPIN!). Beyond that it’s difficult to diagnose in situ and a lot of us opt for recon boards as a cost effective solution. I doubt you have that option over there!
Can’t suggest much else really!
Regards,
Penguin45.
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