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Topic:
Marantz rear "remote in" jack
This thread has 6 replies. Displaying all posts.
Post 1 made on Monday February 2, 2015 at 03:45
yoavts
Lurking Member
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January 2015
6
hello,
I use plain IR connection block to control everything (except the TV) with IR emitters attached to the front panel of the device.
regarding my Marantz Receiver NR1403
In the Marantz receiver I have at the rear panel a "remote in" jack (RCA) that, according to the manual, works as IR emitter (flasher).
I do not have a "flasher in" 3.5mm jack, just the RCA (there are some models that come with the "flasher in" too – mine is not).
I disable the front panel IR eye and connect the rear "remote in" to the connection block.
My problem is:
When the Marantz is connected to the connection block alone – everything works fine.
When I add one more emitter to the connection block – the Marantz stop responding!
if you have any idea what do i do wrong.... i thank you for the explanation.
thanks a head!
yoavts
Post 2 made on Tuesday February 10, 2015 at 03:01
Ernie Gilman
Yes, That Ernie!
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December 2001
29,511
You have some of your terminology wrong and some of the Marantz writing is not easy to understand the first time you run into it.

On February 2, 2015 at 03:45, yoavts said...
hello,
I use plain IR connection block to control everything (except the TV) with IR emitters attached to the front panel of the device.

I'd love to know the make and model of this block. Sometimes help is not possible without knowing exactly which device you're using.

regarding my Marantz Receiver NR1403
In the Marantz receiver I have at the rear panel a "remote in" jack (RCA) that, according to the manual, works as IR emitter (flasher).

What words tell you that it works as an emitter.  I see REMOTE CONTROL IN. The manual says, on Page 48, as regards the jack near the upper left of the back panel, that an IR receiver is connected to that jack. In addition, it says "to perform operations on this unit and external devices with the supplied remote control."

That overly complicated phrase means that you can use the Marantz remote somewhere else if you have an IR receiver in that other place, that is plugged into the IN jack above the words REMOTE CONTROL.

I do not have a "flasher in" 3.5mm jack, just the RCA (there are some models that come with the "flasher in" too – mine is not).

It does not matter that the connector is an RCA jack. That's unusual but it doesn't mean anything special.

And what is a "flasher in"? A flasher is an LED that flashes. Duh. But to make it flash you have to send a voltage to it, so a flasher connection is an output which would never be labeled IN. An IR sensor, on the other hand, sends a signal out of it and into something else, so if you mean "sensor in" instead of "flasher in," well... you have it. It's named REMOTE CONTROL in, and it's the jack we've been talking about. And on Page 48 you see that the device at the other end of the wire is an IR Receiver.

I disable the front panel IR eye and connect the rear "remote in" to the connection block.

But that rear connection is a place to send a signal IN, while you're trying to send a signal OUT to the connection block.

My problem is:
When the Marantz is connected to the connection block alone – everything works fine.

Yeah, but describe what works. In great detail. You said you disabled the front IR eye, and you didn't tell us the make and model of what you plugged into the REMOTE CONTROL IN, nor did you tell us what you can control. How can you control anything, if the front eye is turned off and there's no IR RECEIVER hooked to the back, but instead a connection block?

When I add one more emitter to the connection block – the Marantz stop responding!

Perhaps if you answer all the above, things may be more clear.
Or, if you are using the wrong words and you have connected things properly, perhaps that connection block is only able to output enough current from the Marantz to operate one LED. See, we don't know the brand and model of the block, so we can't look up what it's supposed to do. (By the way, you should have already looked up the brand and model!)

if you have any idea what do i do wrong.... i thank you for the explanation.
thanks a head!

You're welcome a foot and a hand!

One more thing: IR Receivers need three connections and I don't see how an RCA jack can make those connections. The manual doesn't say that the REMOTE CONTROL IN jack is an RCA, but it doesn't say it's not. The illustration cannot be taken for granted as it's representative, not a literal drawing of the connector.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
OP | Post 3 made on Wednesday February 11, 2015 at 03:49
yoavts
Lurking Member
Joined:
Posts:
January 2015
6
first - thank you for the detailed answer!
i'll try to explain the situation a bit different... maybe it will be clearer...
the link line is like this:
==> IR receiver eye to ==> IR connection block with ==> output for 6 IR emitters.
example for the IR kit:
found video at
the kit looks the same inside and outside just the brand label change.
what i did was:
i took a 3.5mm cable from the output of the IR connection block to the Marantz RCA "remote in" input (works as a "rear emitter"). and disable the Marantz front panel IR eye.
and what happend is:
when the Marantz is the only device attached to the IR connection block i can control the Marantz with the remote.
when i attach one more emitter to the connection block the Marantz stop responding to the remote commands.
hope it is clearer now...
thanks!!!!
yoavts
Post 4 made on Wednesday February 11, 2015 at 14:15
Barf
Long Time Member
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August 2013
254
I had a look at this around 10 years ago. I am pretty sure that what I will write was correct then, I suspect it is still true. If not, I would be happy to be corrected.

The (orange RCA) Remote In (and Remote Out) are not normal IR Inputs (essentially connected to an IR LED, possibly in series with a resistor) According to the manuals, it is intended to connect to other Maranz equipment, i.e. it is a propitiatory interface. Everything is not lost though: I looked at schematics, and looked at the signal with an oscilloscope, and it turned out that it corresponded to a normal IR signal with the logical levels reversed. Differently put, with 0 volts, the IR LED lights, when the signal is "hi" (5V?), the LED is dark. Connecting this input to a normal IR connection block (0: dark, hi: light) still may work, due to the modulated nature of the IR signals -- Maranz, at least in the past, is using the RC5, RC5x, or RC6 protocol, al having 36 kHz modulation. Differently put, a demodulating receiver detects a modulated signal, it does not really distinguish between constant on and constant off. (However, it may still be a bad idea, since the circuits are likely not desiged for LED on 99% of the time.) So this may explain why it worked with only the Maranz connected, but not with more devices connected.

SO, if I am right, you only need a signal inverter. (topic for a separate post...)
OP | Post 5 made on Tuesday February 17, 2015 at 02:27
yoavts
Lurking Member
Joined:
Posts:
January 2015
6
Dear Barf,
I'm sorry but can you please give me a link for an example of this signal inverter?
I'm goggling this "signal inverter / IR signal inverter" and cant find anything about it.
Thanks a head!
yoavts
Post 6 made on Tuesday February 17, 2015 at 13:25
Barf
Long Time Member
Joined:
Posts:
August 2013
254
Sorry, I do not know of an off-the-shelf solution. In principle, you can build a signal inverter yourself using an NPN-transistor (e.g. 2N2222 or BC547) and two resistors. Possibly you can build it into the IR distribution block?
Post 7 made on Monday February 23, 2015 at 13:26
Herman Trivilino
Long Time Member
Joined:
Posts:
February 2007
281
It seems the easy solution, then, is to stop using that jack on the back of the Marantz and instead use the eye on the front of the Marantz. You could send IR signals directly to it like you do for your TV or run another emitter to it.

The fact that the jack works when it's the only device connected, though, doesn't seem to be consistent with the inverted signal explanation. I would guess that it's instead a low voltage issue, as already suggested by another poster.
Origin: Big Bang


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