VANCO 280745 - Manual (Page 2)

TECHNICAL SUPPORT
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TROUBLESHOOTING
If your IR system is not working, check to see if IR COUPLER is feeding at least approximately 12 Volts DC onto the coax between the shield and center pin. (Any voltage
between 8-12 VDC is OK). If there is no voltage between the center pin and shield, check the connectors on each end of the coax.
If you are troubleshooting a whole-house IR system and you measure approximately 8-12 Volts DC on the output of the IR COUPLER, but 0 Volts DC on the output of your
RF splitter, check the following items:
1. Make sure you are using a DC passing splitter. Traditional splitters will short out DC voltage traveling on the coax and prevent your IR system from working.
2. Make sure that there are DC blocks on any output from the RF splitter that will not be connected to an IR INJECTOR. If outputs from the splitter are connected
directly to TV sets without going through a IR INJECTOR or DC block, the system voltage will be shorted out by the input of the TV set.
3. Double check the fittings at the end of your coax cables. If a little bit of shielding is touching the center pin, the voltage will be shorted out and the system will not
work.
4. The IR COUPLER has a current limiting circuit. If the IR COUPLER is shorted (due to a bad connection or an on-DC passing splitter) nothing will be harmed.