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Upgrading
Heng Long Tanks - Receiver Boards
A Step By Step Visual Guide
Can be used to replace a faulty board or to update an older
non-sound and smoke version for the new features. Click here
for more information on Heng
Long Tanks.
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1. Inside
a Tiger 1. All Heng Long tanks share the same basic internal
components. |
2. View
of larger main receiver circuit board showing wiring positions.
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3. Close-up of wiring on a new uninstalled main receiver circuit
board. Colour and thickness of wires may vary. |
4. Underside
of a pair of new uninstalled receiver circuit boards. Note 2-pin
socket for receiver crystal on left of smaller board. |
5. Close-up of smaller secondary receiver circuit board. Note
connector for serial. |
6. Note DP1 socket for speaker and DP2 socket for smoke unit. |
7. View
showing wiring of sound volume control. |
8. View
showing wiring positions for left (bottom) and right (top) motors. |
9. View
showing wiring of power lead from battery compartment to switch
and circuit boards. |
Replacing
Receiver Circuit Boards
- Unplug connector
to top hull if not already done
- Unplug aerial
from top hull if not already done
- Important:
Before Cutting or unsoldering each wire, make a note of where
they are attached and put a label on each if it helps. Refer to
the photos above ig necessary.
- Cut/unsolder
wires x4 from motor where it is soldered to the main circuit board
- Cut/unsolder
wire from power lead likewise
- Cut/unsolder
wire from switch likewise
- Cut/unsolder
wire from switch where it is soldered to the smaller circuit board
- Remove both
circuit board from hull (keep screws to one side for reuse)
- Unplug smoke
unit and speaker from sockets beneath the main circuit board
- Discard faulty
circuit boards
- Take new
circuit boards and connect them together using lead provided if
not already connected
- Plug smoke
unit and speaker to sockets beneath the main circuit board
- Fix both
circuit board to hull (reusing screws put to one side)
- Note
positions on circuit boards from which the wires were removed
from. (7 wires to be reattached to new receiver boards)
- Solder wire
from switch to the smaller circuit board
- Solder wire
from switch to the position on the main circuit board
- Solder wire
from power lead likewise
- Solder wires
x4 from motor to the main circuit board
- Reattach
aerial and connector to upper hull when ready to put the tank
together again
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