Troubleshooting
14
LED Driver
Reference Drawings:
Specifications; Gyrus LED Driver, 16 Col
.........................................................
DWG-3071833
Component Location; WP-2103 .....................................................................
DWG-3264487
Schematic; WP-2103 ........................................................................................
DWG-3264543
The LED driver performs the task of switching digits on and off within the display. Refer to
DWG-3264487
to view the location and components of the driver. Refer to
DWG-3264543
for detailed wiring schematics.
When troubleshooting driver problems, four red LEDs labeled
DS1
,
DS2
,
DS5
, and
DS8
provide diagnostic information as shown in the table below.
Note:
While it is necessary to have the display powered on to check the LED indicators,
always turn off display power before servicing.
LED
Function
Operation
Summary
DS1
Radio/
RS-232 RX
Blinking or off
DS1 will be blinking when the driver is receiving radio
signal and off when there is no signal.
DS2
Status
Blinking
DS2 will be blinking at one second intervals to indicate
the driver is running.
DS5
Signal RX
Blinking or off
DS5 will be blinking when the driver is receiving current
loop signal and off when there is no signal.
DS8
Power
Steady on
DS8 will be on and steady to indicate driver has power.
For detailed descriptions and pin-outs of the driver jacks, refer to
DWG-3071833
.
Replacing a Driver
If the driver status indicators do not appear to be working correctly, it may be necessary
to replace the driver.
1�
Open the front panel as described in
Component Locations and Access (p� 13)
2�
Disconnect all plugs from the driver by squeezing the locking tabs together and
pulling the connectors free. It may be helpful to label the cables to know which plug
goes to which jack when connecting the replacement driver.
3�
Remove the nuts securing the driver to the inside of the display.
4�
Carefully lift the driver from the display and place it on a clean, flat surface.
5�
Position a new driver over the screws and tighten the nuts.
6�
Reconnect all plugs to their mating jacks on the driver. The connectors are keyed
and will attach in one way only. Do not force the connections.
7�
Ensure the new driver is set to the correct address. This will be the same address of the
old driver being replaced. Refer to
Setting the Driver Address (p� 15)
.
8�
Securely close the front panel, and then power up and test the display to verify the
issue has been resolved.
