All wiring diagrams to plugs and sockets are shown from the soldering side.
Note: For older-type ML cable, the colour coding is slightly different. This image refers to current ML cable.
Note that the technical specifications for the motorised stand changed from Product ref. MX6/7 to MX8. Newer models also have a different stand connection
(Note: On BeoLab3 there is a blue wire (pin 7) in addition to the wires shown here on the PowerLink diagram. This appears to be a voltage reference for the speakers, and with a single three core wire + screen feeding both speakers, this needs to be connected to the screen.
Failure to connect this pin does not have too much of an effect on the system -UNLESS- you connect up something like a PC2 which ties the stereo to Earth potential through the MasterLink cable, and without the “blue reference” the speaker inputs can float to around 100V above Earth and cause interference between the speakers and the 3000, manifesting as a quiet buzzing noise in the Lab3s. (I rather suspect there was actually an impact on sound quality from no Blue connection but cannot measure it) – Stephen Lewis)
| white | data |
| blue | left channel input |
| green | right channel input |
| shield | ground |
| red | right channel output |
| yellow | left channel output |
| black | data ground |
male to male, using unterminated cable number 6250265 and plug number 7220688 or 7220701. For connection between video system and audio system. Maximum length: 100m
| white | data |
| blue | left channel input |
| green | right channel input |
| shield | ground |
| red | right channel output |
| yellow | left channel output |
| black | data ground |
male plug to wall plate, using unterminated cable number 6250265. Use male plug number 7220688 or 7220701 and an 8-pin wall plate number 7210473. Used for connecting local sources when MCL 2AV is concealed
| Audio System | Video System | |
| white | data | data |
| blue | left channel input | left channel output |
| green | right channel input | right channel output |
| shield | ground | ground |
| red | right channel output | right channel input |
| yellow | left channel output | left channel ground |
| black | data ground | data ground |
wall plate to wall plate, using unterminated cable number 6250265 and two 8-pin wall plates number 7210473. Used for connection between audio and video systems within the wall wiring
| green | right channel hot |
| brown | right channel ground |
| pink | DC supply 7.5 – 8.5 VDC |
| yellow | left channel hot |
| grey | left channel ground |
| white | data |
| shield | data and ground DC ground |
MCL cable from audio systems to terminal strip in MCL2 relay box. NOTE: Use pre-made MCL cables for connection to the audio system whenever possible
| green | right channel hot |
| grey | left channel ground |
| white | data |
| shield | data and DC ground |
| brown | right channel ground |
| pink | DC supply 7.5 – 8.5 VDC |
| yellow | left channel hot |
MCL cable, 2 x 3-pin MCL to 8-pin DIN plug. For connection between audio systems and link system via an 8-pin wall plate. Use pre-made MCL cable for connection to the audio system if at all possible
| green | right channel hot |
| brown | right channel ground |
| pink | DC supply 7.5 – 8.5 VDC |
| yellow | left channel hot |
| grey | left channel ground |
| white | data |
| shield | data and DC ground |
MCL cable between 8-pin DIN wall plate and MCL terminal strip. For connection between audio system and link system via an 8-pin wall plate
| green or brown | signal hot |
| shield | signal ground |
| white | display data |
| shield | data ground |
Speaker link cable from audio system or MCL to 4-pin wall plate using speaker plug number 7220040. Use unterminated link cable number 6250246 or 6250267
| brown | left audio signal |
| green | right audio signal |
| shield: brown/green | left/right ground |
| grey | on/off |
| yellow | on/off |
| pink | APHC |
| white | data |
| shield: white | data ground |
PowerLink cable, male to male, using unterminated cable number 6250277 and plug number 7220345. Maximum length 100m
| brown | |
| green | |
| shield: brown/green | |
| grey | |
| yellow | |
| pink | |
| white | |
| shield: white |
PowerLink cable, male to female (extension) using unterminated cable number 6250277, male 8-pin plug number 7220345 and female 8-pin plug number 7220235 or 8-pin DIN wall plate number 7210473. Maximum length component to component: 100m
| brown | |
| green | |
| shield: brown/green | |
| grey | |
| yellow | |
| pink | |
| white | |
| shield: white |
PowerLink cable, female to female, using unterminated cable number 6250277 and two female 8-pin DIN plugs number 7220235 or two 8-pin DIN wall plates number 7210473
his circuit is designed to use a non-B&O sub-woofer or amplifier with PowerLink sockets.
It’s easy to built and at low cost. In fact that the 5 V DC from the PowerLink socket on pen 4 can’t activate a relay directly you will need a circuit like this.
Parts which I’ve used are easy to buy at electronic shops. You need in total:
1 AC/DC Adaptor 12 V DC
1 IC LM 7806
2 Caps 100Nf 63V
1 Diode 1N4148
1 Resistor 2K2
1 Transistor BC 338
1 Relay 6V DC
Connection of the circuit is as follows:
Connect the adaptor to the 12V and earth of the circuit, connect pin 4 from the PowerLink to the 5V DC PowerLink in of the circuit. When switching on the B&O the relays will switch and connect the 230V AC line into the amp you use. That’s it. For heavy amps you can let the relay switch on a second heavy-duty relay, which will switch on the power line.
