Ultrak CRX-501, Installation And Operation Manual

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4-2
1. Check fuses F1 and F2 on the mother board and the expansion board
(Models CRX-502 and CRX-520 only). F1 fuses the circuit board and
the auxiliary contacts. F2 fuses the pan and tilt and optional heater.
See Figures 2-1 and 2-2 in Section 2 for location of the fuses.
2. Verify that the switches and jumpers are set-up properly. See the
setup procedures and Figures 2-1 and 2-2 in Section 2.
3. Verify that the receiver is getting communication from the transmitter.
LED D1 on the mother board flashes in response to data being
received. Refer to the table in Section 3 for the meanings of the D1
flash patterns on the mother board.
Model CRX-502 and CRX-520 receivers have an expansion board. LED
D1 on the expansion board should be lit when data from the controller
is sent with the address of the expansion board.
See Figures 3-1 and 3-2 in Section 3 for location of LED D1 on the
boards.
4. Check the pan and tilt functions by verifying the LED for each function
lights on the mother board or the expansion board (if applicable) when
the function is performed at the transmitter. See Figures 3-1 and 3-2
and the indicators in Section 3 for the function associated with each
LED.
If the problem has been isolated to the receiver, then it must be removed for
servicing. THERE ARE NO USER-SERVICEABLE PARTS IN THE CONTROL
RECEIVERS. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
ONLY.