Volume Controll

[lesta]

Hi all
i have a JVC MX-J30 stereo with broken volume pot, i tried replacing with normal volume pot but it does not work. the original volume pot was type of pot that goes all the way around on both side (no limit to how much you can turn it each way) therefore i need some help on identifying what sort of replacement pot i need. any help/ideas/suggestions will be greatly appreciated. Many thanks in advance

[T-Bird]

Hi.

What You had there wasn't a potentiometer, that's the reason the potentiometer You put there doesn't work.

It was what some call a digital potentiometer, even though the description isn't all that accurate. It's basically a rotary switch, where the direction of rotation is sensed by the circuitry, from the pulses the unit sends.

As for the replacement, JVC repair centers.

BTW, why do You need one, it works with the remote, right?

Regards
Sam

[JohnMCA72]

That's a rotary encoder, not a pot(entiometer).

A pot. sets the resistance in a circuit depending on the wiper's position on the resistive material. The resistance is a particular value all the time (or at least, until the position is changed).

A rotary encoder provides the circuit with a degree of change, rather than a specific value. The circuitry "reads" the encoder continuously to determine whether it's changed from its previous position, how much, & whether it's "up" or "down". That amount & direction of change is then applied to another component, such as a voltage-controlled amplifier (VCA) or a digital pot. that actually affects the (preamp gain) circuit.