User's Manual

9-28 68P81093C75-A

For ASTRO stations only:

• Simulcast/ASTRO Launch Time Offset

For 6809 Trunking stations only:

• TDATA

Wireline

Physical Replacement of

the Wireline Module

1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws from the edges of the station’s

top panel and lift the chassis out of the case.

3. Remove the cover plate on the left end of the front of the station

by removing the two screws from the front of the plate, then

removing the four Phillips screws from the side and bottom

edges of the plate.

4. Pull out the old Wireline Module by gripping its front, right

corner (where there are no parts on the board).

5. Set all jumpers on the replacement board to match those on the

faulty board. These include the following:

• Input/ouput impedance matching jumpers

• Two-wire/four-wire select jumper

• DC remote control selection jumpers

6. Insert the new module. Make sure it is in the cardguides; push it

ﬁrmly into the chassis until it seats into the card-edge

connectors on the backplane. (Do not slam the board against the

backplane or push any harder than necessary to seat the

connectors.)

7. If desired, power up the station while it is still out of the case to

make sure the module is securely in place. The LEDs on the

Wireline should blink rapidly, indicating that ﬁrmware is

transferring from the SCM to the Wireline Module. When the

blinking stops, the transfer is complete.

If any of the LEDs do not light or are dim, one or more of the

modules are not seated properly. Unplug the station before

continuing to the next step.

8. Reassemble the station by reversing Steps 2 and 3.

After Installing the New

Wireline Module

Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35):

• Rx Wireline

• Tx Wireline