Question about KitchenAid K45SS Classic Stand Mixer

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KitchenAid Mixer > Model - KSM75WH Serial - WS4751156 Phase control board > I need the component values for the zener diode and the Triac.

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6 Suggested Answers

  • 9 Answers

SOURCE: Kitchenaid Mixer K45SS

I just did this last week!
1 Unplug Mixer 2 Remove screw on TOP of mixer body, at back. 3 Remove rear cover and paper-gasket thing (its not the end of  the world if you end up tearing it a little). 4 the phase control (little circuit board w/wires) is at the top (you  should see it very easily) held on by one screw, remove it. 5 when the circuit board is unscrewed, disconnect all the wires  that are connected FROM THE CIRCUIT BOARD to the  black control plate (NOT all wires-there should be 4 left on  the control plate at this point).  you don't need to  remember where all the colors go as the control plate is  labeled->but looking at them and making sure you  understand the abbreviations would be beneficial  (BK=black, BL=Blue RW=Red&White W=white R=red etc.   6 install new phase control (screw), either buy new thermal  grease (used to keep the board cool->it transfers heat to  the mixer's housing) or try to salvage what you can from  the old one. 7 connect wires, paying attention to labels. 8 reinstall paper gasket, then cover, then screw to hold on back- cover.

Posted on Feb 09, 2008

  • 297 Answers

SOURCE: Age of Kitchenaid K5A mixer

1980

Posted on Jul 15, 2009

hslincoln
  • 235 Answers

SOURCE: How do I replace the Speed Control Knob on the K5 Kitchenaid Pro

Hi PETER, Happy New Year! Your Speed Control Knob can be replaced quite easily (OK, maybe with a little effort) by yourself, if you are a DITY type person, feel adventurous, and your mixer is not under warranty.
Before you start taking your mixer apart, be sure you have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website at: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> Enter the 6 character model number, in your case use KSM50P (Your K5SS mixer falls within this manual), and select the first file KSM50P.pdf (438.31 KB) listed under Parts List (4) and then check to verify this matches your mixer model.
Your speed control assembly is attached to the bottom of the top part of the mixer’s head (or Illus. No 1, Gearcase Motor Housing, on pgs 4 & 5).
Turn to pages 6 & 7, titled: “Motor And Control Parts”, which provides an exploded view for the disassembly and reassembly of your mixers electrical components, along with all the parts. Locate lllus. Nos. 1, 2, 3, 4 - Pivot screw, Spring Washer, Switch Lever and Stud, and Control plate spring, respectively, which is the speed control handle assembly and Illus No. 5 and 6 - Speed Link & Cam and Flat Spring. Carefully inspect these parts to see if they have not come loose, particularly the Pivot Screw and Spring Washer. Also check to see if the Speed Link & Cam hasn’t shifted from its position. You should be able to see if something just needs to be tightened or if parts need to be replaced.
Also, with your mixer apart you can check for any other unseemly wear and tear on the gears, etc. It can be messy but quite gratifying to diagnose and repair your mixer yourself.
As far as parts go, here are five potential vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com; and Grainger.com. Prices can vary widely between vendors, so do your comparison shopping.
Finally, here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer. The mixers displayed in the links may be different than your KA model, but the principles are the same.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer, should you decide to go that route.
If you feel this repair is beyond your capability, then I would seek out a local small appliance repair shop in your area. KA Customer Care can give you names of local KA authorized repair shops in your area, but you can also do an online search to supplement what KA may provide you. Call to explain your circumstances and find out their hourly rate and get an estimate of what they think it would cost to repair your mixer. Also, always obtain three or more estimates – do some comparison shopping.
Good Luck. I hope this helps. Howard, Burke, VA
If this solution was helpful, please rate it, thanks! – hslincoln

Posted on Jan 04, 2010

SOURCE: Hello, my Kitchenaid stand mixer

Check that the brushes are the right way round. They will go in the hole in four positions, but only one is right. Use a torch to check inside the hole. Also check the fuse.

Posted on Jan 30, 2010

Testimonial: "It worked !!!!, elated that didn't have to disassemble entire mixer to find the problem. A very big thank you Fixya738."

hslincoln
  • 235 Answers

SOURCE: do th gears in a kitchenaid mixer need oil

Hi SHIRLAFINK, you do not need to 'oil' the transmission gears on a KA mixer. Your KA mixer comes with enough grease to 'last a lifetime' - whatever that means?

Depending on the age of your mixer and how heavily you use it, there may be a time when you might want to replace the grease, but that period is usually measured in years of useage.

Of course if one of the gears strips or breaks, you will need to replace all the grease when you replace the broken gear. Attempting to use salvaged grease jeopardized the remaining gears if pieces of metal or plastic debris are suspended in the old grease.

I hope this helps - hslincoln, Burke, VA
If this solution has been helpful, please rate it, thanks! hslincoln

Posted on Mar 15, 2010

Testimonial: "Thanks very much, very helpful."

hslincoln
  • 235 Answers

SOURCE: How to replace KitchenAid KSM75WH Speed Control

Hi PC1546. Replacing your speed control lever is a pretty simple repair job. The inspection and troubleshooting of the inside of your mixer is a DITY capability, particularly if your mixer is out of warranty. Just be sure to have the Parts List manual on hand. If you're lacking one, you can download a PDF version from the KA website at: http://www.kitchenaid.com/flash.cmd?/#/page/home.
Click on Customer Care>Locate Manuals & Guides> and select “Consumer” for User Type, then enter the 6 character Model Number, in your case, KSM75W, and select the file listed under Parts List (1) KSM75WH1.pdf (341.26 KB) and save that to your computer. (Check that it matches your mixer model).
Turn to pages 6 & 7, titled “Motor And Control Parts”, which provides an exploded view for the disassembly and reassembly of your mixer’s electrical components, along with all the parts. Locate Illus Nos. 1, 2, 3, 4, which are Pivot screw, Spring washer, Switch lever and stud, and Control plate spring respectively. Disassemble your mixer to the point of accessing your speed selector assembly, and inspect the pivot screw to see if it hasn’t worked itself loose over time. That’s the simplest thing to fix. If loose, tighten. Inspect the rest of the assembly to determine if something else hasn’t broken or gotten out of alignment. If something has broken, you can order replacement parts and install them yourself.
As far as parts go, here are five potential online vendors in no particular order: RepairClinic.com; mendingshed.com; searspartsdirect.com; partstore.com; and Grainger.com (for grease). Prices can vary widely between vendors, so do some comparison shopping.
While your mixer is apart it would be ideal to check for any other unseemly wear and tear on the gears, etc. It can be messy but quite gratifying to diagnose and repair your mixer yourself.
Here are some links to several excellent websites that detail the disassembling/reassembly of a KA Mixer.

Between these three websites and their excellent pictures and descriptions and your Parts List manual, you should now be able to completely disassemble and reassemble your mixer.
Good luck and have fun. I hope this helps. Howard, Burke, VA
If this solution was helpful, please rate it, thanks! – hslincoln

Posted on May 03, 2010

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2 Answers

Stand mixer doesn't work after the 5th speed


That's not the sort of problem you are likely to solve at home. There is a speed control pcb and a speed sensor involved, it's not mechanical like the other old models. Best you contact Kitchen Aid and find out where your closest authorised service agent is.

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Kitchenaid mixer will not run on speeds LOW SPEEDS only runs on speed ten. I've replaced the phase board and that was not the issue. what else could be causing this problem


If it does not start at all until you get to speed 10 then look for a broken wire an any of the wires NOT associated with the phase board. Highly unlikely since you have just been there. Next look at the operation of the switch low down inside the black speed control board. There is a primitive switch there operated by a shaft from your speed control lever. You may find the switch is not activating until it gets right up to speed 10. Have you checked the carbon brushes? The phase board you have just done is normally the culprit for your problem.

Dec 20, 2014 | KitchenAid KSM75WH WhiteTilt-head Stand...

1 Answer

Ksm75wh mixer stopped running


Check carbon brushes under the black caps on the motor sides. They only go in ONE way so take care, there is a blocker in the square hole on one corner. Line it up with the missing brush corner. If it's not the brushes remove the back cover & check for broken wires. Do your checking with power unplugged.

Nov 28, 2013 | KitchenAid KSM75WH WhiteTilt-head Stand...

1 Answer

Kitchenaid Hobart K45SS when set at 1-2 accelerates to high speed when making dough. How can I fix this?


Usually when the mixer runs only on high speed it is caused by the control plate adjusted incorrectly or the control plate spring unhooked. Remove the trim & end cover on the mixer and check the control plate spring, if unhooked, attach to bottom of the control plate and squeeze the spring end, also check the speed control plate screws,there are 3 screws on this plate, one at the bottom two at the top, see if adjusting the top screws slows your mixer down.
Next check the wiring of the mixer, Insure everything is wired correctly, to get wiring diagram go to the last page of the service manual. Here is a link to the service manual: http://lib.store.yahoo.net/lib/mendingshed/kitchenaidservicemanual.pdf
If neither of those fixes the problem it is probably a bad phase control board, or a shorted phase control board. With the line cord disconnected, pull the t-bar contacts to open and insert a piece of paper between them so they cannot close. Reapply power-the mixer should just run or buzz trying to run, if it operates at full speed the phase control is defective and needs to be replaced.
Use the service manual to aid you in taking apart the mixer, trouble shooting the problem and putting the mixer back together, based on the mixer only running at high speed some of the time I would assume it is the speed control phase board.
If you have any questions let me know.
Thank you,
Colleen
Customer Service
MendingShed.com

Apr 24, 2013 | KitchenAid Food Mixers

3 Answers

Kitchenaid K45 Mixer will only run at one speed, fast


is it a K45 or a K45SS? If it is a K45 you will have to replace the filters inside and probably the speed control plate, if it is a K45SS then you need a new phase control board. The K45 is pre 1978 and the K45SS is post 1978. Your information is correct on pre 1978 K45 models that the capacitor is bad, but it might be cheaper to go garage sale hunting and find a second machine as the parts are no longer made and having spares on hand may be a significant advantage in the future, also there are a great many of the K45SS parts that will also repair the K45 mixer so it may not be a practical solution. Watch ebay regularly for K45 parts, they come up every couple of months. On the parts diagram also look for the K5 diagram as it is identical to the K45, one is a 5 quart mixer and the other one is 4.5 quart, same parts same motor same everything.

Jan 30, 2013 | KitchenAid Food Mixers

1 Answer

HOW TO TEST A PHASE CONTROL BOARD ON KITCHENAID MIXER


I am sorry to say but only with a new one, about 30 bucks and five minutes of work, but if your mixer has any speeds working except only high (only high means it is the phase control board) then it is more likely the speed control board is bad rather than the phase board. Can you send is more info on what happened when the mixer started or stopped working. We can be of more help with more info

Oct 18, 2012 | KitchenAid K45SS Classic Stand Mixer

1 Answer

Top speeds don't work


Referring to the following parts description:

http://shared.whirlpoolcorp.com/assets/pdfs/literature/Repair%20Part%20List%20-%208212369.pdf

The speed is controlled with a combination of the governor assembly #24 which mounts on the motor shaft, and the phase control board #27 which is mounted on the back of the mixer.

They operate in conjunction with item #25, the control plate assembly.

WARNING SHOCK HAZARD. FOLLOW THESE STEPS ONLY IF YOU ARE COMPETENT WORKING AROUND HOT ELECTRICAL COMPONENTS AND FOLLOW ALL SAFETY PRECAUTIONS!!!

Remove the rear cover screw #37 and the rear cover #36 and examine the governor when it is running. Also watch the speed control lever mechanism as you move it from off to the highest speed watching for binding etc.

If the governor appears to be opening and closing as the speed increases and the linkage is not binding then the problem is most likely the Phase Control Board, item #27.

Apr 18, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

Mixer only operates at high speed regardless of the speed setting


the triac solid-state component on the board for the motor speed control is shorted and you need a new control board, unless you can find an outsource replacement triac,most companies won't sell you parts because of liability issues on internal parts of the unit

Apr 02, 2010 | KitchenAid K45SS Classic Stand Mixer

1 Answer

The mixer motor starts and stops, it will not continue running on any speed. By playing with the speed selector you can get it running sometimes but you cannot keep it running if you change speeds.


Here is how your speed control works:

Speed Control
The speed control of the mixer is attained through the use of a governor assembly mounted at the rear of the control plate assembly.
The electrical circuit is made and broken by the action of the fly ball governor revolving against the control plate.
When the switch lever is moved to an ON position, the position of the control plate with respect to the governor is changed by the action of the switch lever.
Thus, when the control plate is set close to the governor, a relatively low speed of the motor causes the governor to make or break the mixer’s electrical circuit through the control plate.
When the control plate is set farther away, a greater motor speed is required before the governor starts breaking the circuit.
The action of the governor is such that the speed of the motor will remain constant for a given setting of the control plate within certain loads.
After certain loads have been exceeded, the speed of the motor will drop to meet the torque requirements of the given load.
Speed is controlled by the governor and the control plate in conjunction with the phase control.

TRIAC RMS VOLTAGE
BOTH CONTACTS OPEN - 40 VOLTS
ONE CONTACT OPEN - 80 VOLTS
BOTH CONTACTS CLOSED - FULL VOLTAGE
NOTE: The triac regulates the power the motor sees depending on control board contacts.
A device called a triac is a part of the phase control circuit.
This device determines the amount of power the motor sees dependent upon the condition of the control board contacts.
If both contacts are open, about 40 volts RMS is applied to the motor and about 80 volts is applied when either contact is closed and the other is open.
When both contacts are closed, the triac is full on; consequently, full power is applied to the motor. In this way, the speed is controlled.
If the mixer motor begins to run too fast for a
particular speed setting, one or both contacts open, which cuts back on the voltage the motor sees, thus slowing it up.
If the motor operation becomes too slow, one or both contacts will close, applying the needed voltage to the motor to sufficiently increase motor speed.
This is always accomplished through the triac.
The control plate contacts control the triac, and in turn, controls the amount of power supplied to the motor.

The control Plate for your mixer is PN
W10119326
http://www.marbeck.com/mixers_kitchenaid_parts.html

If your not good with tools / meters or tedious repairs do NOT attempt this yourself.
The service manual for your mixer can be found here
http://www.f-ems.com/download/DownLoad.aspx?DocsID=082009012917

and is:
LIT4177310-C


Mar 14, 2010 | KitchenAid KSM103 Professional 5 Series...

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