6
Reassembling the Unit
Refer to
Figure
3
as you close the unit and to
Figure 1
to reconnect cables.
Procedure
1. Align the cover over the expanded base and rear panel. Make sure the four snap tabs are over their
corresponding slots (two in front and two in back).
2. Apply pressure at the four snap tab connecting points, pressing together until all four tabs snap securely
into their slots.
3. Reconnect the power cord to the DSU (labeled POWER), referring back to
Figure 1
.
4. Plug the table-top ac transformer into the ac outlet.
On power-up, the DSU determines what options (DBM, MUX – TDM/Flex) are installed.
A Device Test is automatically initiated on the DSU and each option installed. During the tests, all
indicators on the diagnostic control panel (DCP) light briefly, and the LCD displays the message
Power-up Tests.
When the Device Tests are complete, the LCD momentarily displays messages indicating that each device
(DSU and MUX, or DBM if installed) has passed the power-up test. This test takes approximately
20 seconds to complete.
Note that the red Alarm LED lights, indicating that there is no DDS signal.
5. Perform a DSU Device Test from the DCP to ensure that the unit is functioning properly.
Press the
key to return to the top-level menu, then select Local
Test
DSU
Devic.
6. If the keypad and/or LCD functions fail, check that the Keypad and LCD flat cables are installed properly.
Perform the Device Test again.
If the Device Test fails again, call your service representative for assistance. Otherwise, continue with this
procedure.