Spektrum SPM9021 User Manual

1

DX3R/DX3R PRO Dropdown Kit

Instruction Manual

NOTICE

All instructions, warranties and other collateral documents are subject to
change at the sole discretion of Horizon Hobby, Inc. For up-to-date product
literature, visit http://www.horizonhobby.com and click on the support tab for
this product.

WARNING: READ AND FOLLOW ALL INSTRUCTIONS

Do not attempt disassembly, use with incompatible components, or
augment the product in any way, outside of these instructions. Failure to
follow each instruction and precaution could result in a break of signal
transmission, which will ultimately lead to damage to the product, property
and/or personal injury.

Read ALL instructions. If after reading these instructions you are not
confident in your ability to replace the antenna, send the antenna and
transmitter, free of charge, to the appropriate Horizon Service Center where
this procedure can be performed by an authorized service technician. Or
contact a distributor in your country of service.

CAUTION: Never turn the radio on when changing configurations.

Horizon Service Center 4105 Fieldstone Road

Champaign, IL 61822
USA

877-504-0233

[e-mail]

Horizon Hobby Limited Units 1-4 Ployters Rd

Staple Tye
Harlow, Essex
CM18 7NS
United Kingdom

[phone]

[e-mail]

Horizon Technischer
Service

Hamburger Str. 10
25335 Elmshorn
Germany

[phone]

[e-mail]

INTrOduCTION

Changing the DX3R/DX3R PRO to a dropdown wheel

The DX3R/DX3R PRO can now be set up for a dropdown configuration for right
and left-handed drivers. All the parts necessary for the dropdown are included:
right and left handed dropdown shell, steering wheel mechanism including pot
and trim switches, and necessary hardware.

STEp 1

Remove the batteries from the transmitter. This prevents the possibility of a
short during conversion.

STEp 2

Use a 3/32-inch hex wrench to remove the three screws on the front of the
steering housing as shown.

STEp 3

Carefully remove the steering mechanism and unplug the steering connector.
Remove the steering shell but leave the backplate in place.

SPM9021

WWW.SPEKTRUMRC.COM

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STEp 4

Select the appropriate left/right dropdown shell and pass the steering wheel
mechanism connector through the hole in the shell. Use the 3 short cap
screws to attach the steering mechanism to the dropdown shell.

Note: Do not overtighten the screws.

STEp 5

Connect the steering wheel mechanism connector to the connector from the
transmitter being sure the connection is tight and polarity is correct.

STEp 6

Ensure the backplate is in place and secure the dropdown steering wheel
assembly using the three long cap screws.

STEp 7

Remove the Spektrum graphic cover to expose the steering wheel screw and
remove the steering wheel.

Note:

Proper alignment of the steering wheel with the steering wheel

mechanism stops should be observed for correct reassembly.

STEp 8

Install steering wheel to the steering wheel mechanism with the orignal screw
and reapply the Spektrum graphic cover.

STEp 9

Calibrate the transmitter to ensure the steering mechanism works properly.

CAUTION: If calibration is not properly completed, the radio will not

function correctly. If after calibration the steering or throttle does not
function properly (the travel is reduced or no servo travel), you will need to
recalibrate the transmitter.

• In the List screen use the roller to highlight the Reset function.

• Press the roller to access the Reset functions

• Use the roller to select Parameters.

• Press the roller to access the Conrm screen.

CAUTION: Once YES is selected, you must complete all the calibration

steps described in this section or the radio will not function properly.

• Use the roller to highlight YES then press the roller to reset. The

Calibrate screen appears.

Note: The values will change to correlate with the actual potentiometers.

• Rotate the steering wheel full right then full left; then move the throttle trigger

to full throttle and full brake.

• After realigning steering and throttle/brakes, highlight SAVE. Press the

roller to save the settings.

©2010 Horizon Hobby, Inc., 4105 Fieldstone Road, Champaign, IL 61822 USA
Horizon Hobby Limited, Units 1-4 Ployters Rd, Staple Tye, Harlow, Essex, CM18 7NS, United Kingdom
Horizon Hobby GmbH, Hamburger Strasse 10, 25335 Elmshorn, Germany
The Spektrum trademark is used with permission of Bachmann Industries, Inc.

Created 7/10 29425