Service Bulletins

This information pertains to known or observed issues with Hitec products.

#HS-20100520 HS-79XX Series Servo – Minimal Load Jitter
Applies to HS-7965/7985/7955/7954/7940/7950 servos
Customers have noticed that these high resolution servos have a tendency to jitter when using 7.4 volt power packs and a minimal load is applied. This is due to the high resolution circuit adjusting for slight position variances in the gear teeth. This usually only occurs with minimal loads, for example, when the plane is on the ground in a static position. Once airborne the servo experiences flying loads and the issue resolves itself and should not impact on the flying experience.

#TX-20100520 Aurora 9 Transmitter - Using EPA and D/R Functions Create Dead Zone in Stick Travel
We have confirmed customer reports of a software bug involving the End Point Adjustment and Dual Rate functions. When both functions are at their highest settings, there is a significant dead zone at the stick endpoints. Until this issue is resolved in a future software update, it is advisable for customers to keep either the D/R or EPA setting at 125% or less and the other at 120% or less.

#RX-20100520 - Optima Receiver Antenna Breaking
Applies to Early Production (before February 2010) Optima 6, 7 and 9 Channel Receivers
It has come to our attention that some customers are breaking the "wisker" off of the BODA antenna used on the Optima series receivers. If this happen the results will be a decrease of operable range. Hitec has taken steps to resolve this issue in future productions by utilizing a plastic bushing. For existing receivers without this bushing, it is recommended that customers apply a small amount of flexible adhesive such as Shoe Goo around the upper tip of the BODA and the antenna wisker.