Phase Control Board

Remove one screw on rear cover. Note wire colors coming from pcb at top of assy.
Replace electronic speed control pcb. You will probably have to loosen the two screws holding the brass end plate assy to install new pcb.
Note the number of turns you loosen, so you get it back in the same position. Tighten locking nuts on screws.

This mixer was given to me 8-10 yrs ago with only 2 speeds (cant believe i waited this long to fix it). Repair went good, wasn't sure what i should replace so i replaced Control board, control plate, governor, grease in the gears and the transmission gasket. I first took any and ALL measurements for any screws on the control plate, this will help when you set your mixer speeds when its all back together. When installing the new governor i used a 10mm socket and a mallet to seat it all the way till it stops on the set pin. installed the new control board, with thermal grease on the back of the plate(very important). Didn't need to replace the grease in the gears, but i figured since i was in there id replace it. (No smells and all gears work) I used it to ground 5lbs of elk into burger (speed 4) after repairs and it worked great. Still have about 15lbs left to do and itll do it with out braking a sweat. Maybe i should open up a repair shop to fix these suckers...lol its that easy. What really helped with the repairs is the youtube video from Partselect. Second to none with a step by step on how to replace and repair just about anything on your mixer. Good deal, if i need to replace anything else i know where to go! Thanks

repair is farly simple just take your time, First attempted i didnt replace the speed covernor looked ok but had problems getting slow end to work properly decided to go ahead and install since i purchased it also and walia took care of the cogging problem. Good Luck

I disassembled the mixer using a YouTube video as a guide. Disassembly was easy, as everything was held together with pins and threaded fasteners, and all electrical connections were plug-on.

Cleaning out the old grease was messy and time-consuming. I used a putty knife, screwdrivers (used them like small putty knives in the crevasses), paper towels, and finally, small cloths dampened with alcohol. After about a hour (maybe 90 minutes) everything actually looked like new.

I originally diagnosed the problem as the plastic gear loosening up from it's hub, so I ordered the complete gear tower assembly. It turned out not to be the problem- the gears were fine. With the gears removed to eliminate load, I applied power and saw that the original symptom was still there.

Further research turned up that this symptom is more likely a failed field coil, or possibly the phase control board. I ordered both from PartSelect. In the meantime, I tested the armature by measuring the resistance across the brushes as I slowly turned it by hand. At every angle, the resistance was about 7.5 ohms. Nothing lower, and no opens, so I'm pretty sure the armature is OK.

The phase control board arrived, but as of this writing, the field coil has been back ordered for almost a month. While I waited, I tried a partial reassembly of the head with the new board, and it worked! This weekend, I'll finish reassembly of the motor unit to the base/gearbox and calibrate the speed governor. In addition to the new gear tower and phase control board, it has new grease, seals, and both side levers (tilt and speed control) that had lost their knobs some time ago.

Hopefully it will be ready for another quarter century of use!

Took out stuck brush assy cleaned it and the coil and reinstalled it.
Googled internet to see how to best remove and replace Board-Phase as no instructions came with parts. Actual work replacing parts took only a few minutes. The main work was tearing down the working head to get to the parts and putting it back together. Also had to google how to adjust speed control plate to the correct speed. It helps to have patience and instructions.

1. Removed the mixer back plate Cover. 2. Removed the Speed Control Plate and retained spring, wires and ground wire. 3. Removed the old Speed Control Plate screws. Noted Control Plate pitted contact. 4. Removed old Triac Phase Control Board. 5. Removed old Governor. 6. Installed new Governor. 7. Installed new Phase Control Board. 8. Installed new Speed Control Plate and retaining spring. 9. Reattached Speed Control Plate wires. 10. Adjusted Speed Control Plate Screws and set mixer speeds from Stir to maximum settings. 11. Replaced Motor Brushes on left and right side of mixer. 12. Reinstalled mixer back plate cover.

watched an internet video to see what to do. Unfortunately even after replacing the chip the mixer it still didn't work.

Pulled off end cover. Used the how-to video's to show me how to remove the (3) components (watch out when it comes to removing the spring). Removed all (3) components (one issue was the black cardboard seal, which because of its age broke. Hindsight tells me that I should have purchased a replacement seal along with the (3) new parts.
Fixed the broken part of the seal with scotch tape). Installed all new parts with the help of the video's and put the cover back on. Even with the new parts, the mixer would not run. Come to find out, after I took it to an appliance repair person, that someone had pulled both brushes and put them back in improperly. I could not find a how-to video that showed me how to de-install/re-install the brushes properly. I assume that was because new brushes were no longer available for purchase. At any rate, when the brushes were put in properly, everything worked. The repair person also adjusted the (2) screws on the speed control plate so that when you change the speeds via the lever, it all works properly. I didn't find a how-to video covering those adjustments either.

Followed the video on your website and it was super simple!

I removed the excess of grease to clear all parts. Then I installed new mechanical parts. Finally, I installed all electrical parts. I followed a logical sequence of removing and installing steps. Tip: Never remove parts without a logical order of sequence.