Hi there, I have recently aquired a A901 mixer, I went to use it and after a while encountered a revolting burning smell and blue smoke. Upon closer inspection the 2 x rectangular components on the PCB are swolen and cracked. Are they easy to replace (I do have soldering equipment). Does this point to a more serious problem? The motor was still running; however I decided to stop it just in case (and the smoke was overpowering). I would be grateful of your advise.

Jamie

Jamie, November 2007

Note that a 0.15uF capacitor can be made up by using a 0.1uF capacitor in parallel with a 0.047uF capacitor. [I assume that the 0.01uF capacitor referred to above is a typo. I got the Maplin part number for a 0.1uF capacitor from another 'answers' web-site and it is N69CN. I haven't tried yet it but it looks as though there is enough space for 2 components. 'In parrallel' means that both capacitors have both legs connected to the connection points on the PCB - ie one is piggy-backed on the other.

Stuart Dryden, February 2008

Jamie, just saw your problem... If you can solder you can fix the bits you mention.... Here is a precis of a message I send to another guy who had a similar problem
Maplin part numbers....
> They are:--
> Resistor 220ohms = D220R 2W metal Film Resistor Max 500V @18p
> Resistor 56 ohms = M56R 0.6 W metal film resistor max 250V @
> 13p
> Capacitor 0.047 mF = N68CN Metallised paper RFI class X2 capacitor @
> 41p
> Capacitor 0.15 mF = N75CN This one is possible a "Bum Steer" because
> it is a 0.01 mF capacitor and the one its replacing is a 0.15mf so I'm
> still looking at that...
> So If you only need a new resistor you can, I suggest, obtain it from your
> local Maplin Electronics for a minimal cost.....The M56R should be correct
> at 13p plus the dreaded VAT!!
> You can find your nearest store in the London area on this site:-
> http://www.maplin.co.uk/StoreLocator.aspx?cmd=searchregion®ionid=8
>
> I have not investigated any sites other than the relatively expensive ones
> which charge through the nose but do have a modicum of parts info...
> Anyway the above items are what Maplin's tech dept suggested after seeing
> my photos....
>
> Don't hesitate to yell if you need help but I'm sure you can solder a new
> resistor in place...
> One wonders why it blew tho'? Does the motor spin freely?? Have you
> checked the brushes? They're easy to get out just carefully unclip the
> little brown tufnal insulating plates and unscrew the metal plates...
> If they're worn down to say less than 10mm in length then I'd certainly
> replace them.. If not then put them back in the same orientation as they
> were when disassembled..
> Then they are already bedded in...
> I think you'll get brushes by post, should you need them, from either
> http://www.torreelectrics.co.uk/cgi-bin/ss000001.pl?SS=Kenwood+chef+motor+brush&PR=-1&TB=A&SHOP=&ACTION.x=12&ACTION.y=8
> depending on model (click on yours) or from
> http://www.masterspares.com/contactus.htm
> Have a really good look at the 0.047 mF capacitor near your burnt out
> resistor from what I've gleaned it's mainly the capacitors that fail...

Cheers Bob E...

Bob Egerton, February 2008