Lightmybricks LEGO MEDIEVAL CASTLE User manual

LEGO® MEDIEVAL CASTLE
#31120 LIGHT KIT
INSTALLATION GUIDE

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTALLATION GUIDE 2
Light My Bricks
LEGO® MEDIEVAL CASTLE #31120 LIGHT KIT
INSTALLATION GUIDE
Hi There!
We’re here to help you get started on the LEGO®
Medieval Castle (31120) Light Kit.
This PDF details the instructions for the LED light kit only. If
you are wishing to purchase this product, please click here
to view the product page.
If you run into any issues, please refer to the troubleshoot-
ing section towards the end of this guide.
Have fun and enjoy!

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
PACKAGE CONTENTS 3
PACKAGE CONTENTS: LEGO PIECES:
- 6 x White 15cm Bit Light
- 7 x White 30cm Bit Light *
- 2 x Cool White 15cm Bit Light
- 1 x Green 30cm Bit Light
- 7 x White 30cm Micro Bit Light *
4 x 6-Port Expansion Board
1 x 4-Port Micro Expansion Board
1 x 8-Port Micro Expansion Board
14 x Adhesive Square
* Indicates Components which include spares.
• 7 x Plate 2x2 w Rounded Bottom – Trans Clear
• 2 x Slope 30 1x1x1/2 – Trans Clear
• 1 x Plate 2 x 8 – Black
• 1 x Round Plate 1x1 – White
• 2 x Round Plate 1x1 w Open Stud – Black
• 1 x Round Plate 1x1 w Open Stud – White
• 1 x Round Plate 1x1 w Open Stud – Pearl Gold
• 1 x Wave Rounded Small with Pin (Candle Flame)
2 x Flicker Eects Board
3 x 5cm Connecting Cable
1 x 15cm Connecting Cable
4 x 30cm Connecting Cable *
1 x USB Power Cable
(Power Source not Included)

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
CONTENTS 4
Contents
Before You Begin 5
Blueprint 8
Instructions 9
Final Product 43
Troubleshooting 44
Contact 49

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
BEFORE YOU BEGIN 5
Before You Begin
Laying cables in between
and underneath bricks
Cables can fit in between and underneath
LEGO® bricks, plates, and tiles providing
they are laid correctly between the
LEGO® studs. Do NOT forcefully join
LEGO® together around cables; instead
ensure they are laying comfortably in
between each stud.
CAUTION: Forcing LEGO® to connect over
a cable can result in damaging the cable
and light.
Connecting Cable
Connectors To Expansion
Boards
Take extra care when inserting connectors
to ports of Expansion Boards. Connectors
can be inserted only one way. With the
expansion board facing up, look for the
soldered “=” symbol on the left side of the
port. The connector side with the wires
exposed should be facing toward the
soldered “=” symbol as you insert into the
port. If a plug won’t fit easily into a port
connector, do not force it.
Incorrectly inserting the connector can
can result in bent pins inside the port or
possible overheating of the expansion
board when connected.

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
BEFORE YOU BEGIN 6
Before You Begin
Connecting Cable
Connectors To Strip Lights
Take extra care when inserting connectors
to ports on the Strip Lights. Connectors
can be inserted only one way. With the
Strip Light facing up, ensure the side of
the connector with the wires exposed is
facing down. If a plug won’t fit easily into
a port connector, don’t force it. Doing so
will damage the plug and the connector.
Connecting Micro Cable
Connectors To Micro
Expansion Board Ports
Take extra care when inserting the
micro connectors to micro ports of Micro
Expansion Boards. Connecting Micro Bit
Lights to Micro Expansion Boards is similar
to connecting lights and cables to Strip
Lights. With the expansion board facing
up, ensure the side of the connector with
the wires exposed is facing down. If a plug
won’t fit easily into a port connector, do
not force it. Use your fingernail to push the
plastic part of the connector to the micro
port.

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
BEFORE YOU BEGIN 7
Before You Begin
Installing Bit Lights Under
Lego® Bricks And Plates
When installing Bit Lights under LEGO®
pieces, ensure they are placed the correct
way up (Yellow LED component exposed).
You can either place them directly on top of
LEGO® studs or in between.

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 8
BLUEPRINT

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 9
INSTRUCTIONS
To ensure a smooth installation of
your light kit, please read and follow
each step carefully. If you run into
any issues, please refer to the online
troubleshooting guide.

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 10
1 2
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 11
3
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
Cool White 15cm Bit Light

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 12
4
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
White 15cm Bit Light
6-Port Expansion Board
30cm Connecting Cable
Trans Clear Round Plate
2x2 w/ Rounded Bottom

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 13
5
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
If you experience any issues with the lights not working and suspect an issue with a component, please try a dierent port on the expansion board to verify where the fault lies (with the light or
expansion board). To correct any issues with expansion board ports, please view the section addressing expansion board issues in our troubleshooting section.
White 30cm Bit Light
USB Power Cable
Connect the
other end to a USB
Power Bank, USB
Wall Adaptor, or USB
to AA Battery Pack
(sold separately)

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 14
6
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
White 30cm Bit Light
Trans Clear Round Plate
2x2 w/ Rounded Bottom
Trans Clear Round Plate
2x2 w/ Rounded Bottom

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 15
7
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
Ensure to leave
the USB Power
Cable running
under the wall when
connecting.
Exclude the USB
Power Cable when
twisting.
If you experience any issues with the lights not working and suspect an issue with a component, please try a dierent port on the expansion board to verify where the fault lies (with the light or
expansion board). To correct any issues with expansion board ports, please view the section addressing expansion board issues in our troubleshooting section.
2x Adhesive Squares

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 16
8
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 17
9
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
White 15cm Bit Light
Slope 30 1 x 1 x 2/3
Trans Clear
10

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 18
11
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
White 15cm Bit Light
6-Port Expansion Board Slope 30 1 x 1 x 2/3
Trans Clear
6-Port Expansion Board

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 19
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
Connect the
other end of the
30cm Connecting
Cable to the 6-Port
Expansion Board on
the other side of the
gate.
Connect the
other end of the
30cm Connecting
Cable from the
watchtower section
to the 6-Port
Expansion Board on
the left side of the
gate.
If you experience any issues with the lights not working and suspect an issue with a component, please try a dierent port on the expansion board to verify where the fault lies (with the light or
expansion board). To correct any issues with expansion board ports, please view the section addressing expansion board issues in our troubleshooting section.
30cm Connecting Cable

LEGO MEDIEVAL CASTLE 31120 LIGHT KIT INSTALL GUIDE
INSTRUCTIONS 20
12
Legend DISCONNECT CONNECT /
RECONNECT TURN / FLIP DIRECTIONAL TWIST / BRAID POWER ON TEST NOTE ICON
White 30cm Micro Bit Light
x2