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Which potentiometer? I have a marantz 2285 . I got it with an aftermarket volume pot. What is the original volume pot . logarithmic or linear , and resistance? Thanks.

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thebloms
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SOURCE: Marantz 2285

It should click in like the others Multipath is a FM filter to keep station close or on top of each other from bleeding over usually not needed or used

Posted on May 09, 2008

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Can a Potentiometer RV4LAYSD503A 50K Ohm 19-8351 be replaced with RV4LAYSA503A Potentiometer 50KOHM


I don't know but the similarity in part number would suggest one is a revision of the other or originates from a different manufacturer.

If they are dimensionally similar it would be worth a try if the correct replacement isn't available. The main thing to watch out for could be differences between the tracks of the two types.
There are four types of carbon potentiometer tracks; linear, logarithmic and anti-clockwise versions of those two. Linear types tend to be used for adjusting voltage whereas log types are about sound. Used for volume controls they closely mimmick the logarithmic response of human hearing.

The difference is easily recognised using an analogue ohmmeter.
Fitting a linear in the place of a log type would likely mean most of the adjustment would be bunched at one end of the track.

Although manufacturers tend to give spare parts of their own products fancy part numbers, very few are specially made and most are sourced from catalogues of generic parts. It is often cheaper to take a look in constructor catalogues and those supplying parts to the repair trade before resorting to manufacturer's spare parts.

Jan 02, 2016 | Cars & Trucks

1 Answer

Volume control not working how to fix it, can it work wothout volume control?


Short the volume contole pins to get full volume
Put a fixed resistor in its place
Find a similar volume control with correct resistance (in Ohms)

Visit an electronics supplier in your area to get the right part.
For Example
1M 24mm Potentiometer Linear Single Gang Potentiometers Resistors Passive...

Sep 19, 2015 | Audio Players & Recorders

1 Answer

Volume control not working


Left and right wires are like the ends of a carbon resistor.
The centre connection is the slider that slides along the carbon resistance.
Spray inside the device,
The centre sliders often loose connection from overuse.
Carefully take apart and clean & put slight tension back on centre slider.
Look to see if carbon track is worn out?

Take the centre wire off the Pot and try it on either end.
One will be full volume the other will be lowest volume.

Read the Ohms value of the Pot (stamped on)
or use a cheap Ohm section of MultiMeter
Note the size of threaded area
Get similar to take it's place


1M 24mm Potentiometer Linear Single Gang Potentiometers Resistors Passive...

Potentiometer Wikipedia the free encyclopedia

Sep 19, 2015 | Audio Players & Recorders

1 Answer

There is a crackle when i turn the volume knob.


First unplug it. Sounds like you need to spray some tuner cleaner in the pots that are crackling. Pull the knob off and you should be able to use a spray can of tuner cleaner with the straw that comes with them to spray into the potentiometer , then rotate the pot several times while it is still wet. After cleaning them all, wait 10 minutes and then try.

Jan 09, 2014 | Marantz Vintage Model 2220b Stereophonic...

1 Answer

Marantz sr-96 receiver master volume not working


Possible that the analogue to digital converter is faulty, possible failure of the potentiometer and the motor drive.If the volume does increase with the remote then it is possible that the POT or the circuit to it is faulty. check this D/A converter.

Dec 14, 2011 | Marantz Audio Players & Recorders

1 Answer

I open my CS900 Peavey power Amp to service. This is when I realised that One Gain Pot is B50K and one is C100K. Is this normal or has it been changed ? the Two Gain Pot looks like it is not the Original...


Firstly, the two kinds of currently available pots are A and B, these are logarithmic (A) and linear (B) in their function.

Older pots were marked differently though, it used to be that linear was marked A, and logarithmic marked C.

A gain control should use a logarithmic control ( A, in the new coding system, or C in the older system ) so there's nothing wrong here.

As for the value to use, I would suggest replacing with 100K, the same value as the pot marked with the C, as this is an older marking code this pot was probably in the circuit originally and the 50K pot marked with the A probably found it's way in there in the more recent past.

I hope this helps

Apr 05, 2011 | Audio Players & Recorders

1 Answer

I have a maxent 26inch LCD TV. Today, I was watching the TV when something very weird happened. The sound went all the way up to maximum and stayed there. I simply cannot turn the volume down...


Wow, that's a bit of an off brand...
It may be hard to find parts for.
If you can find parts, replacing the board with the audio section on it will be the easiest fix.
The cheapest fix is to get a stereo potentiometer, and put it inline with the speaker so that you at least have a manual volume.
If you are capable of running the unit into a stereo, see if the mute button works, the mute usually won't affect the line out, and you can control the audio from your stereo.

Here's a (quick and dirty) schematic of how to put a potentiometer in a speaker line correctly.
supertech_11_12.jpg
The idea is you can control the speaker anywhere from leads shorted (no sound) to leads across tv output (full volume). Choose a potentiometer value around 100 ohms with a linear taper if you can find it. Most pots will be logarithmic..for the most part it won't matter.

Mar 10, 2011 | Maxent MX-50X1 50 in. Plasma Television

1 Answer

Volume adjuster stays on one level can not increase or reduce volume


The Potentiometer/switch (the rotary knob to adjust the volume) is probably faulty. The original is a 9mm B50K panel pot/switch. I'm on the hunt right now for a replacement.

If I can't get one, I'll have repair it using substitute parts, specifically an appropriately sized SPST switch for the power circuit and a regular B50K potentiometer to adjust the volume.

Feb 24, 2011 | Dell 5650 Computer Speakers

3 Answers

1974 FENDER TWIN REVERB HAS NRE TUBES NEW FILTER CAPS AND WAS REPAIRED BY RETIRED AUTHORIZED FENDER TECH. PROBLEM AMP HAS VETY LOW OUTPUT UNTIL YOU CRANK IT TO 8-10 THEN IT SOUNDS HORRIBLE DISTORTED AND...


This sounds like a power supply problem. The high voltage for the tubes is not right. Either you are missing an amplification stage because this or one of the coupling caps is faulty. I'd have to see the unit itself to give you any more details.

Dan

Jul 22, 2008 | Audio Players & Recorders

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