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Spectrum DX6i service menu (calibration) USE AT YOUR OWN RISK - DO NOT ASK ME FOR HELP ON THIS, AS I CANNOT HELP.  For brave ones this is what i found out.  Ensure that "AIL D/R", "FLAP/GYRO", "ELEV D/R", "GEAR/F MODE", "RUDD D/R" are in 0 position (UP) and MIX/TH HOLD is in 1 position (DOWN).  1. Turn OFF your Spectrum DX6i 2. Push both dx6i horizontal trims at the same time to the direction of POWER switch. (Push Left trim to the right and right trim to the left) Hold them so and now turn ON your dx6i.  You should see version information if you still hold trims.  If you release trims then dx6i shows calibration summary menu. Code:  T A E R U 915 956 947 956 M 472 504 508 544 D 043 067 082 060  T - THRO stick A - AILE stick E - ELEV stick R - RUDD stick U - up position of stick M - middle position of stick D - down position of stick  Now it gets interesting.  * Flip the AIL D/R switch down and you are in the UP position calib. menu. Move your sticks to set new UP position values. System shows only highest values. To get summary menu just flip the AIL D/R switch up.  * Flip the FLAP/GYRO switch down and you are in the MIDDLE position calib.menu. In this menu you can set new middle values for sticks to get summary menu just flip the FLAP/GYRO switch up.  * Flip the ELEV D/R switch down and you are in the DOWN position calib.menu. In this menu you can set new down values for sticks. System shows only lowest value to get summary menu just flip the ELEV D/R switch up.  * If you flip the MIX/TH HOLD to UP and DOWN (LCD goes blank in UP position) then original calib. data is reloaded.  SAVING NEW CALIB. DATA - in the summary menu flip the MIX/TH HOLD to UP (screen is blank) and press Roller. It will beep few times and will go in to standard SETUP MONITOR menu.  * SW TEST (switch test) - in the summary menu flip the MIX/TH HOLD to UP (screen is blank) and flip the GEAR/F MODE to DOWN  Before recalibrating your DX6i please write down your org calib. data because you may need it  Sorry for my bad english.