37
VI. TROUBLESHOOTING
QUESTION
POSSIBLE CAUSE
EFFECT
REMEDY
SERVOS AND MOTORS
DO NOT WORK
CRYSTALS DEFECTIVE
NO SIGNAL AT RECEIVER;
ELECTRONICS RECOGNIZE THE
DEFECT AND DEACTIVATE MOTOR
AND SERVOS
REPLACE CRYSTALS
TRANSMITTER NOT SWIT-
CHED ON
SWITCH ON TRANSMITTER
SERVOS AND MOTORS
DO NOT WORK
THROTTLE/PITCH STICK NOT
IN IDLE POSITION
THE ELECTRONICS NOTICE A DE-
FECT AND PREVENT THE MOTORS
FROM STARTING UP
MOVE PITCH CONTROL STICK TO
IDLE POSITION
SERVOS AND MOTORS
DO NOT WORK
IF A SIX-CHANNEL TRANS-
MITTER IS USED THE
SWITCH POSITION IS NOT
CORRECT
THE ELECTRONICS NOTICE A DE-
FECT AND PREVENT THE MOTORS
FROM STARTING UP
SET 2-POSITION AND 3-POSI-
TION SWITCHES TO FLIGHT
PHASE “HOVER” RESPECTIVELY
TO“MOTOR OFF”
SLOPPY TAIL CONT-
ROL
MODEL WAS MOVED HEA-
VILY DURING CALIBRATION
PROCESS
TAIL DRIFTS OFF
AFTER LANDING RECALIBRATE
GYRO: MOVE THROTTLE STICK
TO IDLE AND HOLD TAIL STICK
LEFT FOR 2 SEC.
HELICOPTER VIBRA-
TES
MAINROTOR BLADES OUT
OF TRACK
VIBRATIONS ARE AMPLIFIED
THE HELICOPTER VIBRATES HEA-
VILY
READJUST TRACKING AS OUTLI-
NED IN MANUAL
MAIN AND/OR TAIL ROTOR
SHAFT BENT (CRASH?)
CHECK AND REPLACE ROTOR
SHAFT(S)
FLYBAR BENT OR TWISTED
REPLACE OR STRAIGHTEN FLY-
BAR
ROTOR BLADES OR PADDLE
NOT BALANCED
REBALANCE ROTOR BLADES,
CHECK PADDLES FOR CHIPS
AND REPLACE IF NECESSARY
HELICOPTER
WOBBLES
ROTOR HEAD REVOLUTIONS
TOO LOW
TOO MUCH AND/OR DIFFE-
RENT BLADE PITCH
BLADES ARE STALLING
TIGHTEN BOTH BLADE HOLDER
ADJUSTMENT SCREWS EVENLY
FOLLOW SETUP INSTRUCTIONS.
GRUNDEINSTELLUNG BEACHTEN.
BATTERIES DEFECTIVE OR
INADEQUATE FOR
OPERATION
MOTORS AND ELECTRONICS OPE-
RATE POORLY
REPLACE BATTERIES
ROTOR HEAD SPEED
COLLAPSES AT MAXI-
MUM PITCH
PITCH PUSHRODS ADJUS-
TED INCORRECTLY
SYSTEM WORKS AT POOR EFFI-
CIENCY
BOTH BLADE HOLDER ADJUST-
MENT SCREWS TOO FAR OUT.
TIGHTEN EVENLY
FOLLOW SETUP INSTRUCTIONS.
