Motorola DR 3000 Reassembly of Transmit Radio, Replacing the Thermal Pad and Heatsink

5-22 Disassembly/Reassembly Procedures: Transmit and Receive Radio Reassembly — Detailed

12.Insert the solder terminal end of the SSI cable into the 11-position connector at the front face of Receive radio. A dashed black line is visible from the top view.

5.8.4Reassembly of Transmit Radio

(Refer to Figure 5-5)

5.8.4.1Replacing the Thermal Pad and Heatsink

1.Make sure that mating surfaces of Heatsink and Transmit radio are cleaned and free from any debris.

2.Align the holes on the thermal pad to the screw holes in the Transmit radio and place thermal pad onto the Transmit radio.

3.Align the holes on the heatsink to the screw holes in the Transmit radio and place heatsink onto the thermal pad.

4.Secure but do not tighten the seven screws previously removed.

5.When all seven screws are secured, tighten the screws to 1.0 N-m. Refer to Figure 5-19.

5.8.4.2Reassembly of the Transmit Bracket Assembly to the Enclosure

1.Position the Transmit radio onto the transmit bracket so that the label “FRONT” on bracket is facing the front face of radio.

2.Align the mounting holes on the Transmit radio and the transmit bracket on both sides.

3.Attach and secure the M5 screws and washers on each side of the bracket.

4.Tighten the screws to 3.0 N-m, making sure the Transmit radio remains horizontal.

5.Align and mount the transmit bracket assembly onto the four stud screws in the enclosure.

6.Ensure that dimple locator (bump) on the enclosure is nested within the hole on the transmit bracket before installing and tightening the lock nuts.

7.Secure the four lock nuts (two on each side) onto the stud screws.

8.Tighten the four lock nuts to 2.0 N-m.

9.Connect the antenna cable to the Transmit radio.

10.Insert the N-Type connector of the antenna cable through the back panel of the enclosure and secure it using a lock washer and nut.

11.Tighten the nut to 0.7 N-m using a 19 mm deep well socket driver.

12.Firmly connect one of the connectors from the dual end of Y-split cable to the Transmit radio.

13.Connect the black colored end of accessory cable connector to rear of Transmit radio making sure that the locking connector tab is facing up.

14.Connect the white colored end of the accessory cable connector to the connector board assembly making sure that the locking connector tab is facing toward the front of repeater.

NOTE: Make sure that the accessory connectors at both ends are locked in place. A clicking sound can be heard from the locking tab.

15.Insert the solder terminal end of the SSI flex cable (positioned bottom side of PCB) into the 11-position connector in the Transmit radio. A solid black line is visible from the top view.

16.Insert the solder terminal end of the flex cable (positioned top side of PCB) into the 30- position connector in the Transmit radio. A solid blue line is visible from the top view.

February 21, 2007 6866576D03-A