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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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2 Answers

Why when I turn my volume up it cuts off and back on


Your volume potentiometer is dirty and not tracking properly. Clean it by turning unit completely off and then turning the volume control from full clockwise position to full counterclockwise.-- Repeat this for about fifty times or so. The motion of the wiper should have cleaned off the pot surface and restore operation.

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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.

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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.

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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

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Looking for repair center near Belmont,Mass. ?? in need of a 50K Ohm Potentiometer and knob, the 50K Ohm is a part # 31190335 it is for a Peavey XR-600B


you might try Radio Shack for the pot, also a larger music store with or without repair dept, typically stock various pots like that, some with audio taper and some with linear taper Also if Radio Shack doesn't actually have it in stock they have an extensive parts suppy catalog in the store, also Allied Radio out of Chicago is another option, good luck

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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

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My Teac Z-7000 will not record tapes


Hello,
some weeks ago I got this really impressive deck (Teac Z 7000) from a colleague, and found the same problem. I fixed it, and the fix is not too complicated. It´s the potentiometers that do fail. All pots are from the same manufacturer (Alps) and construction. The problem is that the wisher is broken away from the holding plastic and will loose contact completely. You can check that with a normal ohmmeter: You´ll find the total resistance over the outer terminals but endless resistance from one of the outer terminals to the middle wisher contact. The values are: 100 kOhm linear for each of the upper left pots (fader,space), 2x22kOhm pos.log. for the lower left pot (phone volume). So, what does a broken wisher at the "fade in" pot do? The Recorder "thinks" that You selected an "endless" fade in time, and the result is : no record level. You can do an easy "quick and dirty" fix just to see if that´s the problem: Hold- or better solder- a say 47kOhm resistor in parallel to the conducted potentiometer terminals and try to record.
4 of 5 pots have been defective in my deck, and I´ve replaced them with standard types from my local electronic supplier (Conrad electronic, has a shop in Frankfurt/Main). Well, the new parts didn´t fit perfectly, I used a file to get them in (not visible from outside). Also I lost the possibility of pushing the knobs in and out, but that is not a really problem.
I assume this fix might also help owners of the Teac Z-6000 and Z-5000, which- most probably- use the same type of potentiometers.
This text was written by Boris Witke, Kelsterbach (near Frankfurt/Main), Germany. E-Mail:
witke1@web.de Please tell me if You were successful, possibly we get lucky users of these really fascinating machines.

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2 Answers

Volume control


Well here goes a spelling problem for me. You need to replace a component called a podentiomiter. It is the actual volume control behind the knob. I have had to replace a few of these, and pioneer seems to to more prone to these problems.

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1 Answer

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

Nov 22, 2007 | Audio & Video Receivers

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