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Receive Four Square Control Troubleshooting Procedure
1) Test the system CC-8 or CC-8A Switch Control Console unit,
which should be connected only to the control lines of the
Receive Four Square System. When the CC-8 or CC-8A is
connected to the control cable, do all of the selected switch
position LEDs light normally?
2) When rotating the Control Console switch from position 5, 6,
7 and 8, if all LEDs light normally, measure BCD output
voltages. Normally, +12 for the CC8A (up to 18 Vdc for the
CC8) is output on the rear panel green 5-pin connector pins A,
B and C, reference to the ground pin G as shown below, also
in Table 4 in the Receive Four Square manual.
Forward Direction
CC-8A Switch
Position
A
B
C
CC-8A LED
Illuminated
Element 1 (Default)
5
0 0 1
# 5
Element 2
6
1
0
1
# 6
Element 3
7
0 1 1
# 7
Element 4
8
1
1
1
# 8
BCD Directional Control Matrix, “1” 12 Vdc (Default)
The lettered pins of the 5-pin connector correspond to the letters in the table above, with
voltage measured as referenced to a G ground terminal. Voltage on the CC8 which uses an
internal transformer may be measured as high as +18 Vdc unloaded. The CC8-A uses an
external 12 volt DC input, therefore the output will be 12 Vdc.
3) If the voltages are not normal, less than +10 to 18 Vdc, with the control line connected, then
disconnect the control line and retest the Control Console. If voltages that were not correct, are
now okay, that indicates a short in the control line or a problem in or beyond the RFS-2
Receive Four Square relay unit.
4) If the CC-8 or CC-8A has only a couple LEDs lit with the control cable disconnected, then it
may have sustained lightning pulse damage and will need to be repaired or replaced. A new
DXE-CC-8A is available from DX Engineering.
Continue troubleshooting the array control
with a good CC-8 or CC-8A or by using a 1A fused
power source.
5) Determine if the control line is intact by resistance or voltage testing each conductor for shorts
with the far end of the control cable disconnected from the RFS-2 unit.
6) With a good CC-8 or CC-8A or other power source connected, measure A, B and C control
conductor voltages at the RFS relay unit with the control cable connected, and again at the end
of the control cable that is disconnected from the RFS relay unit. If measured voltages are not
b10 to 18 Vdc on the selected line, a resistive, short or open circuit problem exists in
