JR R921X User Manual
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JR R921X User Manual

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JR R921X Receiver
User Guide

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Summary of Contents for JR R921X

  • Page 1 JR R921X Receiver User Guide...
  • Page 2 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. Meaning of Special Language: The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product: NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND a little or no possibility of injury.
  • Page 3 Are DSM2 Transmitters Eligible for a DSMX Add-on? Yes. Any JR DSM2 integrated transmitter, X9303, X9503, 11X, 12X or 12MV is eligible for a $75 add-on by sending it to the Horizon Hobby Inc. Service Center. Any X9503, 11X, or 12X purchased November 1, 2010 or later is eligible for the add-on at no additional cost.
  • Page 4 DSMX technology, the R921X instills confidence in the most challenging RF environments. The JR R921X allows the use of an optional Flight Log Data Recorder (JRPA145). The Flight Log plugs into the data port and provides quality of RF link data of the previous flight, allowing the confirmation of the operational performance of the systems.

  • Page 5: Quick Connect

    R921X Binding Instructions The R921X receiver must be bound to the transmitter before it will operate. Binding is the process of teaching the receiver the specific code of the transmitter or transmitter module so it will connect only to that specific transmitter. Once bound, the receiver will only connect...

  • Page 6: Smartsafe ™ Fail-Safe

    Note: To bind an aircraft with an electronic speed controller that powers the receiver through the throttle channel (BEC), insert the bind plug into the battery port and proceed to Step #2. The R921X features two types of fail-safe: SmartSafe Fail-safe ™...

  • Page 7: Preset Fail-Safe

    Standard Range Testing Before each flying session and especially with a new model, it is important to perform a range check. All JR aircraft transmitters incorporate a range testing system which, when activated, reduces the output power, allowing a range check.

  • Page 8: Advanced Range Testing Using A Flight Log

    Advanced Range Testing 1. Plug a Flight Log (JRPA145, optional) into the data port in the R921X receiver and turn on the system (transmitter and receiver). 2. Advance the Flight Log until F- frame losses are displayed, by pressing the button on the flight log.

  • Page 9: Receiver Power System Requirements

    Flight Log (JRPA145)—Optional for R921X Receiver The Flight Log is compatible with the R921X receiver. The Flight Log displays overall RF link performance as well as the individual internal and external receiver link data. Additionally it displays receiver voltage. Using the Flight Log After a flight and before turning off the receiver or transmitter, plug the Flight Log into the Data port on the R921X receiver.

  • Page 10: Warranty And Repair Policy

    While R921X receivers’ minimum operational voltage is 3.5 volts, it is highly recommended the system be tested per the guidelines below to a minimum acceptable voltage of 4.8 volts during ground testing. This will provide head room to compensate for battery discharging or if the actual flight loads are greater than the ground test loads.

  • Page 11: Warranty Services

    (c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be that Horizon will, at its option, (i) repair or (ii) replace, any Product determined by Horizon to be defective. In the event of a defect, these are the Purchaser’s exclusive remedies. Horizon reserves the right to inspect any and all equipment involved in a warranty claim.

  • Page 12: Non-Warranty Repairs

    Non-Warranty Repairs Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for repair you are agreeing to payment of the repair without notification.

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