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How to Connect This Marantz Setup?

Chitown84 said:
as well as having the power strip on and off and I was getting a reading of 124v every time.
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spark1 said:
It also shows that the on/off switch of your power strip is not working, if indeed you are getting voltage from the 3300 when the power strip is turned off.
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The outlets on your power strip operate very oddly. (See instructions from amazon) Which outlets did you have the 3300 plugged into.
  • Master outlet cannot be switched off
  • Must have something plugged into Master outlet to make the switchable outlets work
  • Two other outlets are always on
  • Exactly which outlets do you have the 3300 and 250 plugged into? Both into the power strip or 250 into back of 3300?
Screenshot 2025-07-01 070931.jpg
 
dankik said:
The outlets on your power strip operate very oddly. (See instructions from amazon) Which outlets did you have the 3300 plugged into.
  • Master outlet cannot be switched off
  • Must have something plugged into Master outlet to make the switchable outlets work
  • Two other outlets are always on
View attachment 3541680
Click to expand...

That is bizarre. And may be the root problem.
 
spark1 said:
Just for the record, is the power indicator lamp of the 3300 coming on or not?
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It is not, the tech had replaced it on Friday with an incandescent bulb while he was testing the unit out.

It was working when I brought it home and fired everything up for the couple minutes I tested it out but the next day when I went to turn it on I got nothing, no light or anything.
 
dankik said:
The outlets on your power strip operate very oddly. (See instructions from amazon) Which outlets did you have the 3300 plugged into.
  • Master outlet cannot be switched off
  • Must have something plugged into Master outlet to make the switchable outlets work
  • Two other outlets are always on
  • Exactly which outlets do you have the 3300 and 250 plugged into? Both into the power strip or 250 into back of 3300?
View attachment 3541680
Click to expand...

spark1 said:
Take the 3300 off the power strip. Plug it in in directly to the wall.
Click to expand...

so I believe I originally had it plugged into the power strip that you posted but I also pulled out my other power strip and tried it on this one too. On the one you posted, I believe I tried it in the switched and always on outlets. I did it straight into the outlet the other day also and still had nothing. I will try again now though and play around. I had used this live wire power strip because it just seemed more simple.

If I use The Simply Conserve strip, it should be plugged into the Always on outlet I imagine?

Now that I think about it though, from when I tested everything out and it was working and until it stopped, nothing had changed. I had it all plugged into the same strip so im not sure why it decided to stop working. anyways, im off to start playing around with the outlets again.

Screenshot 2025-07-01 at 9.26.28 AM.png
 
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As far as connecting the 3300 to the 250, here is what the owner's manual says:Screenshot 2025-07-01 074823.jpg
The 3300 is a little odd because it does not have a power amplifier but has speaker switching.
  • If you want to use the speaker switch on the front, you need to connect the speakers as shown in the diagram above.
  • Connect your speaker terminals from the 250 to the Spkr Switching Inputs on the 3300, then connect your speakers to the Speaker System 1 outputs on the 3300.
  • Then you can use the speaker switch on the 3300 front panel to select speaker Off, System 1, System 2 or both.
  • This should not affect your amp operation, but after you get things sorted out will be better to control the speakers.
  • Also, make sure that the Tape 1 and Tape 2 push switches are in the OUT position unless you are playing a tape.
Eventually, you should plug the 140 AC cord into the switched AC outlet on the back of the 3300, then the 3300 AC cord into the wall socket (or power strip) so that you can turn both off with the power switch on the 3300.

ONE MORE THING:
If this is your testing setup, and you are trying to listen to the turntable connected to Phono 2, you need to "un-press" the TAPE 1 button, otherwise you will not hear anything.

Screenshot 2025-07-01 080217.jpg
 
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dankik said:
As far as connecting the 3300 to the 250, here is what the owner's manual says:View attachment 3541700
The 3300 is a little odd because it does not have a power amplifier but has speaker switching.
  • If you want to use the speaker switch on the front, you need to connect the speakers as shown in the diagram above.
  • Connect your speaker terminals from the 250 to the Spkr Switching Inputs on the 3300, then connect your speakers to the Speaker System 1 outputs on the 3300.
  • Then you can use the speaker switch on the 3300 front panel to select speaker Off, System 1, System 2 or both.
  • This should not affect your amp operation, but after you get things sorted out will be better to control the speakers.
  • Also, make sure that the Tape 1 and Tape 2 push switches are in the OUT position unless you are playing a tape.
Eventually, you should plug the 140 AC cord into the switched AC outlet on the back of the 3300, then the 3300 AC cord into the wall socket (or power strip) so that you can turn both off with the power switch on the 3300.

ONE MORE THING:
If this is your testing setup, and you are trying to listen to the turntable connected to Phono 2, you need to "un-press" the TAPE 1 button, otherwise you will not hear anything.

View attachment 3541718
Click to expand...

Ok so I just got done plugging the 3300 directly into an outlet, into the "always on" and "switched" outlets of the white com ed power strip, as well as the black live wire power strip and nothing at all. no indicator light or anything. both tape buttons were not pressed in either.

not sure what the hell happened but its very frustrating. I wish I had tested it for longer than a couple minutes to see if she would have shut down on her own. I just turned everything off and left it. so nothing changed from when it was working.

here's some pictures of the inside if it helps at all
Screenshot 2025-07-01 at 10.32.42 AM.pngtempImagewH8bz0.png
 
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spark1 said:
Pull the fuse out. Use continuity function to test it.
Click to expand...

I will do that first thing tomorrow morning when I get home. Thank you.

Do you, or anyone else reading this, have any idea as to what happened? Why did it work when I tested it and then decide to not turn on?
 
Chitown84 said:
the unswitched outlet on the back of the 3300 with the unit on and off, as well as having the power strip on and off and I was getting a reading of 124v every time.
Click to expand...
The UNSWITCHED outlet is wired directly to the AC power cord, and from your previous test it looks like 120VAC is coming in. What I don't think you tested is the 3300 power switch. An intermittent power switch could cause the symptoms that you see, works one time but doesn't work later.

Use your voltmeter to measure ACV on the SWITCHED outlets on the back of the 3300 to see if you measure AC voltage with the switch in the ON position and no voltage when in the OFF position. These outlets are after the switch but before the fuse.
Screenshot 2025-07-02 083130.jpg
 
dankik said:
The UNSWITCHED outlet is wired directly to the AC power cord, and from your previous test it looks like 120VAC is coming in. What I don't think you tested is the 3300 power switch. An intermittent power switch could cause the symptoms that you see, works one time but doesn't work later.

Use your voltmeter to measure ACV on the SWITCHED outlets on the back of the 3300 to see if you measure AC voltage with the switch in the ON position and no voltage when in the OFF position. These outlets are after the switch but before the fuse.
View attachment 3542524
Click to expand...

When I get home tomorrow morning I will test that as well as the fuse.
 
Good afternoon everyone, a bit of an interesting update for you guys that are following this. So I brought the 3300 into the kitchen and tested her fuse for continuity as well as ac voltage for the switched outlets. I had continuity on the fuse and 124 volts on the switched and unswitched outlets.

after that I decided to push the power button in and can you believe it, she came on lol. took her to the outlet where my setup has been plugged in and she came on again there as well. took her back to the kitchen and then she decided not to turn on again. Still had proper voltage from the switched and unswitched outlets though.

Not sure if this means it's an issue with power button switch but let me know what you guys think. I haven't emailed my tech yet but he's open tomorrow for drop off I believe. I just don't want to bother him with an email yet until you guys let me know what you think.

pretty exciting that she decided to come on though.
 
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You may have an intermittent power switch, or intermittent problem on the power supply board.

Diagnosing intermittent problems is a challenge.

You could get a contact burnishing tool and use it on the switch contacts, but this may be best left to an experienced tech. Another option is replacement. The manual provides no information on the specs of the power switch, but I would think something like this would work from a technical standpoint:


However, I don't know if the spacing of the mounting screws is correct. @dankik can probably confirm its suitability from a technical standpoint.

Some switches have two sets of contacts; If yours does, the wiring to the switch can be changed to use the second pair.

Before taking it to the tech, a hail-mary solution would be to unplug the 3300 and then work the power switch rapidly in and out 25-30 times. If you are lucky, this might remove enough corrosion/oxidation for the switch to work more reliably (assuming the switch is even the problem)...
 
spark1 said:
You may have an intermittent power switch, or intermittent problem on the power supply board.

Diagnosing intermittent problems is a challenge.

You could get a contact burnishing tool and use it on the switch contacts, but this may be best left to an experienced tech. Another option is replacement. The manual provides no information on the specs of the power switch, but I would think something like this would work from a technical standpoint:


However, I don't know if the spacing of the mounting screws is correct. @dankik can probably confirm its suitability from a technical standpoint.

Some switches have two sets of contacts; If yours does, the wiring to the switch can be changed to use the second pair.

Before taking it to the tech, a hail-mary solution would be to unplug the 3300 and then work the power switch rapidly in and out 25-30 times. If you are lucky, this might remove enough corrosion/oxidation for the switch to work more reliably (assuming the switch is even the problem)...
Click to expand...

so I do have some deoxit d5, would it be worth it to spray the power switch and then rapidly press it a bunch? I do know that when my tech was inspecting the unit and had it hooked up to the oscilloscope, he mentioned he could see it needed some deoxit based on how some of the signal was looking on the screen. he didn't mention that about the power switch though. I think he was playing with the volume knob maybe.

anyways, I do have some deoxit so if its ok to spray on it, let me know and I will try. should I be concerned with over spray onto something that shouldn't get wet? I think this stuff is ok to spray on anything but I just want to make sure.

just an added update. I had the unit plugged into the kitchen counter outlet again and it turned on, I turned it off but left it plugged in for a while, came back and it won't turn on again lol.

that power cord was repaired at some point. not sure if that could still be an issue also.
 
If the unswitched outlet on the 3300 consistently shows power, it is NOT the cord.

I am not a fan of Deoxit on power swtiches. Much more knowledgeable folks than me advise against it, due to concerns about it possibly making the contacts of high voltage connections worse, rather than better. If you decide to try it, be sure to let it dry THOROUGHLY before energizing the switch.

Just try exercising the switch without Deoxit before taking any other steps. Unplugged, of course.
 
To be clear, I'm not sure I believe that Deoxit will exacerbate problems with the power switch. And I'm fairly confident that if allowed to dry completely after spraying and exercising the switch, the likelihood of damage is small. But it cannot help with pitted contacts, which are usually the issue with power switches in my (limited) experience.

If you try it, perhaps using compressed air to push out any excess/remaining Deoxit fluid, and then letting it dry for a few hours, would further reduce the chances of causing a problem.
 
spark1 said:
To be clear, I'm not sure I believe that Deoxit will exacerbate problems with the power switch. And I'm fairly confident that if allowed to dry completely after spraying and exercising the switch, the likelihood of damage is small. But it cannot help with pitted contacts, which are usually the issue with power switches in my (limited) experience.
Click to expand...

I just tried rapidly pressing the switch in and it's not turning on again. im gonna leave it alone at this point. im emailing my tech right now. im hoping he's open for drop offs tomorrow.

thanks a ton guys, I will keep everyone informed.
 
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