I am a new user! I applied here because I am looking for this integrated circuit - which is the motor controller of a kneader - is broken; 144TNCZ07. It seems to be the secret IC of the manufacturers as there is no information about it anywhere. Therefore, the device cannot be used, it only operates at one speed. Either it is thrown away or new electronics are needed. It can't even be obtained. I did quite a bit of research on the internet - unsuccessfully. If anyone knows such an IC, where to get it, please write.
Thanks!
György, from Hungary

Hi;i hope this video can help for repairing this card:

. The Ic is a 14 pin microcontroller em78p153k.
If you like to learn more about how it works (SM168-S1 ) look here:

 

Buenas amigo la solución pera arreglar esa tarjeta es comprar el controlador de las velocidades ic es este sn74als33

 

Good point! Tho I don't think there's a connection between it and what is probably the gate of the triac as far as I can see on the original pics posted of the pcb

Es el ___ sn74als33

 

Q1 fires the Triac, Q2 is for Zero crossing detection, Unless you have drawn the circuit wrong, as the chip has no Negative supply??

as a temporary measure remove R7 15 ohms at one end and see if it stops.

Sn74als33 lo monte y me sirvió controla las velocidades del motor correctamente

 

Hi guys! I'm new here but enter to thank you all for tips. My mixes was varying speed and I taked a look on hall sensor and put it more close of magnet ring and my problem was solved. In time, I was looking for a board to by and will take maney on trash. Thank you !!!

 

Buenas amigo la solución pera arreglar esa tarjeta es comprar el controlador de las velocidades ic es este sn74als33

are you sure ???
the sn74als33 is a QUADRUPLE 2-INPUT POSITIVE-NOR BUFFERS WITH OPEN-COLLECTOR OUTPUTS
I main it's not a micro-controller

 

Hello. I have the same mixer and there is not any output voltage from the board. I checked all components seems good, can you tell me where could be the falure. "How to check Hall speed sensor and can I cancel it"

 

Hello,
just wanted to let everybody know that I repaired a board like this. Symptoms are the same as described here: the machine always went at full speed.
I repaired it by changing the hall sensor (to a Allegro A1104EUA-T) and repairing the 5V voltage supply. I am not sure if it was necessary to replace the hall sensor because putting a new in alone did not clear the problem. I noticed that the 5V supply always dropped to 2.8V or lower with the hall sensor (also the good one) connected. Therefore I just used a phone charger and injected the 5V from the usb charger into the circuit. From then on it worked prefectly.

Just as a tip: power the board with the phone charger and test the position of the sensor by spinning the motor by hand and then the sensor signal should alternate between ~0V and ~5V. It took me quite some time to get the position right.