Futaba 2PCKA - Manual (Page 18)

Reference
Before you decide to have your system repaired, if there is no apparent physical
damage, read this instruction manual again and check to be sure that you are
operating the system as it is supposed to be operated. If you are still having
trouble, pack up your system in its original shipping materials and send it to
your nearest authorized Futaba R/C Service Center.
Be sure to include a note in your package that describes the trouble in as much
detail as possible, including:
-Symptoms of the problem, any unusual mounting conditions
-A list of items you are sending, and what you want to be repaired.
-Your name, address, and telephone number.
-When requesting warranty repair, please include the warranty card.
Read the warranty card supplied with your system.
Repair Service