Pedestal fan

[Howie393]

I am trying to repair a 11 month old fan. Have tested the motor, ok, so fault is with the PCB.
Q1 Input voltage is 230vac and after the fuse their is a resistor 330k, will it be ac or DC after the resistor?
Q2 the ic is unmarked, how do I find out what it is?

 

[danadak]

Take a picture, well focused, both sides of board.

A resistor drops voltage, but does not "convert" it. A rectifier converts
AC to DC, also solid state switches like MOSFETs can convert AC to DC,
and vice versa. You can have AC on one side of a R, DC on the other, or
AC on both sides or DC on both sides, depends on the circuit and its design.


Regards, Dana.

 

[MaxHeadRoom78]

Q2 If it is an AC motor, most likely a Triac.
What case style does it have.

 

[Ramussons]

An IR sensor, 3 Triacs, Flip-Flops / Latch. These are the main components.
Check the fuse, The diode D1, the Varistor.