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Expansion Kit Installation Guide
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Yamaha LC4 Expansion Kit Installation Guide
Contents Page
Chapter 1
Introducing the LC4 Expansion Kit . . . . . . . . . . . 1
Chapter 2
Installing the LC4 Expansion Kit . . . . . . . . . . . . . 2
Step 1 thru Step 3 . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 thru Step 5 . . . . . . . . . . . . . . . . . . . . . . . . . 3
Step 6 thru Step 9 . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 10 thru Step 11 . . . . . . . . . . . . . . . . . . . . . . . 5
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Chapter 1
Introducing the LC4 Expansion Kit
The LC4 Expansion Kit allows you to add ports to your Music Teaching Lab System, enabling you
to accommodate more students. Each Expansion Kit adds eight ports, which gives you room for an
additional eight students in stereo mode or 16 students in split mode.
What’s Included
The Expansion Kit includes
• (1) 8-port channel card
• (8) Instrument Boxes (IBX4)
• (8) Headsets with microphones
• (8) RJ45 lab connector cables
• (8) 1/4" stereo cables
• (5) Aluminum spacers
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Chapter 2
Controller
Installing the LC4 Expansion Kit(s)
Installing the Kit is straightforward and can be done by anyone with basic technical knowledge and
a screwdriver.
Step 1
If the LC4 is installed, turn it off and remove all cables connected to the Expansion Kit. If the RJ45
cables plugged into the Instrument Boxes are not labeled, it is recommended that you label them
before removing them from the system in order to make the process of reconnecting them later
much easier.
Step 2
Remove the seven black screws from the top panel, seven black screws from the back panel and four
screws from the RCA connectors on the back panel as shown in the diagram.
Remove these screws
Lab Hub Rear Panel
Step 3
Lift and remove the top/rear panel from the Lab Hub.
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Step 4
Install the Channel Circuit Board from the Expansion Kit into the Lab Hub by inserting the pin
end into the connector on the back panel. Make sure that the holes for the spacers on the Channel
Circuit Board line up correctly with the silver spacers.
Step 5
Install the five spacers into the holes in the new Channel Circuit Board to secure it to the Channel
Board below it. Add any additional Channel Circuit Boards.
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Step 6
Controller
Remove the blank plates covering the newly populated connectors.
Remove these screws as needed
Step 7
Replace the cover and all the screws.
Step 8
Replace all the cables that were unplugged at the beginning of this installation. Make sure that the
power is still switched off.
Step 9
Place the new Instrument Boxes with the desired instruments. Plug one end of the instrument cable
into the headphone output on the piano and the other end into the Instrument Box INSTRUMENT
IN connector. Plug the supplied student headset into the Instrument Box HEADSET and MIC
connectors. For best results, set the volume on the instruments to maximum and adjust the trimmer
on the side of the Instrument Boxes to a safe, comfortable level for the headsets. Repeat this process
until all the instruments are connected to an Instrument Box.
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Step 10
IBX4 INSTRUMENT BOX
Connect the new Instrument Box to the newly added Channel Circuit Board connectors using the
provided RJ45 cables.
Step 11
You’re done. Power up the system. You can select the new students by pressing the BANK button
on the Controller. For more information about using the system, refer to the LC4 Operation Guide.
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