Australia Made Kenwood chef A703C motor spins ok but only at maximum speed, what part do I need to replace?
Part required to repair
Feb 13, 2023
Last reply: 3 years ago
6 Replies
don't give us any key info. That site you're posting from is blocked by most folk here.
Maybe around the year 1967 or so ?
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Here's a picture.
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You would think the speed control would be crude, considering the age.
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There's an actual semiconductor shown here. Apparently a capacitor or a triac failure on the board, causes a speed control failure. You would think whatever is behind the knob could be at fault as well.
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The board is called a phase control in honour of the triac (a "lamp dimmer" running a motor).
Paul
uk ebay item 111078195861 sounds hopeful?
The Kenwood I fixed didn't have a Triac..some sort of compressible lump of resistive rubber I think.
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The good news is that parts were available from Kenwood and the woman I spoke to knew what I wanted more than I did.
I think the Triac came in in 1976.
Certainly in 1967 we were still using mainly germanium transistors and
50V was a big voltage for semiconductors.Now I know SCRS and some Triacs were available in the 1960s, but I cant recall them being cheap consumer level devices.
So is it a brushedmotor withe a system like a drill speed controller system then? Most low torque things like fans merely play around with the windings to make the speed different. Brian
ISTR seeing a kenwood a few years ago that used a centrifugal governor, and that's what I'd expect of a 60s machine. Unless the op shows us what the speed control system is, it's not a very useful question.
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