Troubleshooting, Reference, Frequencies – Futaba 4VF User Manual
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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: