Troubleshooting, Reference, Frequencies – Futaba 4VF User Manual

Page 21

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REFERENCE

TROUBLESHOOTING

If your digital proportional R/C set does not operate, its range is short, it intermit-
tently stops operating, or it operates erroneously, take the action shown in the table
below. If this does not correct the trouble, please contact a Futaba dealer.

Check point

Check item

Action

Transmitter/receiver
battery

Dead battery.
Incorrect loading.
Faulty contact con-
nection.
Dirty contacts.

Replace the battery. Charge the nicd
battery.
Reload the batteries in the correct
polarity.
If the contact spring is deformed,
correct it.
Wipe with a dry cloth.

Transmitter antenna

Loose.
Not extended to full
length.

Screw in.
Extend fully.

Crystal

Disconnected.
Wrong band.
Different from specifi-
cation.

Push in.
Match transmitter/receiver band.
Replace with specified crystal.

Connector connection

Incorrect wiring.
Disconnection.

Reinsert.
Push in.

Receiver antenna

Close to other wiring.
Not cut?
Not bundled?

Separate from other wiring.
Request repair.
Install in accordance with instruction
manual.

Servo linkage

Binding or looseness

Adjust at the fuselage side.

Motor (electric motor
plane)

Noise countermea-
sures.

Install a noise absorbing capacitor.

75 MHz Band: (car/boat only)

75.410 61

75.610 71

75.810 81

75.430 62

75.630 72

75.830 82

75.450 63

75.650 73

75.850 83

75.470 64

75.670 74

75.870 84

75.490 65

75.690 75

75.890 85

75.510 66

75.710 76

75.910 86

75.530 67

75.730 77

75.930 87

75.550 68

75.750 78

75.950 88

75.570 69

75.770 79

75.970 89

75.590 70

75.790 80

75.990 90

50 MHz Band: (Aircraft/car/boat -Fcc
Amateur license required)

50.800 00

50.900 05

50.820 01

50.920 06

50.840 02

50.940 07

50.860 03

50.960 08

50.880 04

50.980 09

72 MHz Band: (Aircraft only)

72.010 11

72.210 21

72.410 31

72.610 41

72.810 51

72.030 12

72.230 22

72.430 32

72.630 42

72.830 52

72.050 13

72.250 23

72.450 33

72.650 43

72.850 53

72.070 14

72.270 24

72.470 34

72.670 44

72.870 54

72.090 15

72.290 25

72.490 35

72.690 45

72.890 55

72.110 16

72.310 26

72.510 36

72.710 46

72.910 56

72.130 17

72.330 27

72.530 37

72.730 47

72.930 57

72.150 18

72.350 28

72.550 38

72.750 48

72.950 58

72.170 19

72.370 29

72.570 39

72.770 49

72.970 59

72.190 20

72.390 30

72.590 40

72.790 50

72.990 60

Frequencies

The following frequencies and channel numbers may
be used for aircraft and surface in the United States:

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