Intercom Replacement: Distinguishing 6 Wires for Receiver Installation in 10-Story Building

Hello. I have such a problem.

I have to replace the intercom receiver, but I don't know how to distinguish the wires, in the sense of what purpose. The old handset is torn off. Besides, there is no description on it.

Is it possible to distinguish wires using e.g. a multimeter? We assume that I am unable to go to my neighbor to disassemble his receiver. The installation is 6 wires in a 10-story building.

Hello, I hope and you know that the intercom earpiece is powered by various voltages and the electromagnetic lock, the so-called bolt, is powered by alternating voltage, most often with a value of about 12.8 to 15 volts, it may be a little different, you are sure that when you measure with a multimeter and you have voltage there variables it is opening. The power supply of the handset, the so-called band to which we are talking, is usually a direct voltage of 4.5-4.75 volts, you measure it with a voltmeter set to direct voltage and there you will have a plus and minus potential, and the next two wires will be the bell power supply voltage of about 6, 5 volts rises to about 11 volts when someone presses the bell button in each intercom system has a different color scheme and decoding is not a problem requires patience and peace and the potential difference may differ, but you can successfully decode it with a multimeter and then know what to connect to.

1. Look for the wire with the lowest potential with a voltmeter. This will be ground (probably two wires, can be checked with an ohmmeter for a short circuit). The two wires with a + potential are the microphone line and the bolt opening. It is unlikely that the bolt control is based on alternating current, because such systems are practically not used anymore.
2.Connect the earpiece or any headphones between ground (found in point 1) and one of the two potential-free wires. In one of them you should hear what is happening in front of the cage. This is the headphone line.
3. The second potential free wire showing a break (ohmmeter) to the others is a call signal.
4. The other two with potential +. With the handset connected (point 2), make one short-circuit to ground. You should hear either a buzzing bolt or a crackle in the outer cassette.

Common color code for wires
Green - ground
White - microphone
Red - handset
Blue - calling
Yellow - mass of the bolt opening
Brown - plus bolt opening

the next two wires will be the bell supply voltage of about 6.5 volts rising to about 11 volts

Choke 81. There is no potential at the call terminal (CA).
My friend. First you need to find 2 wires from the electric strike. It is best to shorten all the cables one by one and listen to whether the lock works. If you eliminate the lock, you will have 4 wires left. Now you need to find the mass and the vein of the microphone. With a voltmeter, you must check each other until you find 2 cables with about 8 to 9V. Plus it will be the microphone vein. Attach the ground to the ground terminal in the uniphone and now attach the remaining cables while holding the handset to your ear. If you hear the sound from the gate, it will be the cord from the handset. The last one will be from calling, or if you prefer calling.

I figured it out at home by measuring the voltages and I did not use it, unless it is also about repairing the headphones themselves, then we will use an ohmmeter and I know without a problem that this is what I can do. I did it at home and it worked if someone wanted to use my method, it is just a proposal, intercom systems are very different in terms of construction, and the best reliable method to check is an old telephone handset with crocodile clips.

Dławik81 wrote:

The bell power supply voltage of approximately 6.5 volts rises to approximately 11 volts the moment someone presses the doorbell button

It's not true. There is a clear break at the inexpensive dormancy on the bell line. as for the other lives, I do not express myself, because it can be different. It takes a little practice and you can hear everything.

in 6-wire installations, it should be explained that it can also be a RWT system which has a buzzer on ringing and is controllable from 4.5 V to 5.5 V
otherwise it is an electronic "generator"

it is worth getting to know the neighbor's camera (name), and the power supply (name), we look for the connection diagram and we have the colors assigned to the function, but if the colors are repeated, the meter and the old RWT handset (headphone insert) or the new hearing aid is not a replacement tool.

in these systems we distinguish
talk module:
MASS,
Microphone,
Earpiece (speaker)
opening the lock:
2 AC conductors
and CALL (vertically, separate for each apartment)

find the variables from 8 V to 14 V with the meter and put it aside
find the mass and the receiver with the loudspeaker (you will hear a voice from in front of the cage)
you have 2 cables left after connecting to the camera to the correct microphone, when you blow into the microphone you should hear a blow in the earpiece speaker but to be sure send deliberate down to the cassette
the last cable is a call when replacing with RWT, it is necessary to insert a generator board or a squeaking element (piezoelectric from 3 V-12 V) and for the rest of the installation it is enough to put it on the call terminal.

I have descriptions of many headphones (manufacturers), in case of problems, write ...

Regards, TOM

Hello,

I'm digging up because I have a problem with the identification of cables in a 6-wire installation (CS1131-002G uniphone).
I did as @ karl102 described, I found 2 ground leads (with an ohmmeter, I called) - green and white.
I connected the green one to terminal 6, and the white one to 10.
Holding the earpiece to my ear, I put the wires to 1, on the red one I heard voices in front of the cage and left it plugged in on 1.
Then I sent a friend who called my cassette number and I checked the voltage, 12.6V appeared on the blue + and green-, I plugged in the blue one on the CA.
Then I applied the remaining 2 wires to the 2 while talking to the handset, the voice at the bottom appeared on the black.
He has been brown which is pinned on 9.

To sum up, the conversation between the apartment and the manor house works, the control of the bolt works, but the problem is when calling, it is very quiet ... I checked with my neighbor, he has the same uniphone and the same wires connected ...

what could be the problem ??

best regards and thank you in advance for the answer