Motorola DR 3000 service manual Placing Thermal Pads on PA and Transistor Components

5-20 Disassembly/Reassembly Procedures: Transmit and Receive Radio Reassembly — Detailed

Driver Thermal pad Replacement

1.Use a plastic flat-edge tool to lift the pad from the chassis surface. Discard the old pad.

2.Use a soft cloth to remove any remaining residue. Alcohol can also be used, if necessary. Care should be taken to minimize any cleaning-agent contact with the surrounding shield gasket.

3.Once the surface is clean and dry, remove the new pad from the shipping liner, and place the pad on to the chassis, aligning the edges of the pad with the edges of the chassis, as shown in Figure 5-21.

Driver Pad (7515357H01)

Radio Chassis

Figure 5-21. Aligning Driver Pad on Chassis

4. Apply even pressure to the pad and remove the protective liner.

B. Transceiver Board Thermal Pad Replacement Procedure

Transistor Thermal Pads and PA Thermal Pad Replacement

1.Use a plastic flat-edge tool to lift each pad from the transceiver board. Discard the old pads.

2.Use a soft cloth to remove any remaining residue. Alcohol can also be used, if necessary.

3.Once the surface is clean and dry, remove each new pad from the shipping liner, and place in the proper location on top of each transistor component and the audio PA with the white side down (see Figure 5-22).

Transistor	PA Thermal Pad (7515581H01)
Thermal Pads
(7515582H01)
	Audio PA Component

Figure 5-22. Placing Thermal Pads on PA and Transistor Components

February 21, 2007 6866576D03-A