How to simulate a potenciometer encoder?

[Francesc V.]

Hi:

I have a Rotel amp where the main volume works badly...........going clockwise the volume goes up and down.......anticlock wise more or less the same..........it's like a fight to turn volume up or down......xDD

Here is the schematic.

My question is how I could simulate to turn volume up or down to isolate the issue......maybe it's not the encoder but it's the main board.

A PWM signal between pin 1 and 4???

Thanks in advance,
Francesc.

[stj]

it's not pwm,
it's quadrature encoding.
simplest test is to get a rotary encoder from ali or ebay for under a € and wire it inplace of the original
you get get them loose or on a pcb with pin headers for beer money
this datasheet shows the switching

[truclacicr]

The EC16B24... number is an Alps part. I can see plenty at AliEx.

[Francesc V.]

Thank you all for the feedback.
I've already ordered one........but in the meantime I managed to open it, clean it.........and it's back to life. Not sure how much will last :-)

[sam_sam_sam]

Thank you all for the feedback.
I've already ordered one........but in the meantime I managed to open it, clean it.........and it's back to life. Not sure how much will last :-)

It depends on how much moisture is in the area of this device did you clean it out with contact cleaner or did you 99% alcohol to clean them out or something else

[Francesc V.]

Soldered on the PCB, I removed/bent the 4 staples.............then disassembled parts, cleaned with Isopropanol and mount them again.

[sam_sam_sam]

Soldered on the PCB, I removed/bent the 4 staples.............then disassembled parts, cleaned with Isopropanol and mount them again.

How difficult was this

[Francesc V.]

Not very difficult, but I needed a microscope to align correctly the three internal pins that make contact with the encoded wheel.