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Kenwood repair KM400

Will only run at full speed.Have pulled it apart, but how can I tell if the problem is in the speed control board or in the feedback from the motor. And what is available in the way of spares. Thanks.

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  • 94 Answers

If your circuit board got a little wet . you might check into that for residue must clean with baking soda solution and toothbrush clean area or brake cleaner might dissolve the residue too ...speed control is just a resister band . and if very old can be worn down like a climate control in a car ...

Posted on Apr 01, 2014

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Blakeslee (Kenwood) A717 mixer speed control

I had the same problem. Had to strip the machine down to get to the motor. On the top is a moving plate with various capacitors etc mounted. On the front side there was a Capacitor (At least I think it was) with the wire broken.
I resoldered it and the machine now works fine.

I hope this helps

Posted on Jul 05, 2008

mirran
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SOURCE: Blakeslee A717 speed control

Hi,

where are you from, i have phone number to agents that still provide support for A700 series.

Posted on Jul 12, 2008

  • 1212 Answers

SOURCE: Kenwood Chef KM400 motor speed is too slow

A failed SCR or triac will not always show visually any sign of failure. Chances are good that is all that is wrong. If mixer had been plugged in when it got wet, that is all it takes. Also check the transient voltage supressors if the chef has them. They would be identified on the circuit board. as TVS or MOV along with a number. Only number to use is the one on the component.

If you can find ratings for the old devices, just matching the basic ratings should do. Just guessing, but the SCRs should be 20 amp and 400 volt, If the old ones are a lower rating than my guess, there is no problem with using the higher ratings, if my guess is low, go with the original's ratings. Manufacturer of device does not matter as long as ratings are at least comparable.

Posted on Jan 19, 2012

  • 1 Answer

SOURCE: hi im looking for Service Manual Schematics for

Hi looking for help aswell with the control knob mines aslo broke

Posted on Oct 12, 2012

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A failed SCR or triac will not always show visually any sign of failure. Chances are good that is all that is wrong. If mixer had been plugged in when it got wet, that is all it takes. Also check the transient voltage supressors if the chef has them. They would be identified on the circuit board. as TVS or MOV along with a number. Only number to use is the one on the component.

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