Radio Assembly; Chassis Assembly - Motorola Commercial Series Basic Service Manual

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7.0

Radio Assembly

7.1

Chassis Assembly

7.1.1 For Radios with PA Clip
1. Ensure that the Fugi Poly Thermal Pad is on the small pedestal located on the PA
compartment of the chassis.
2. Verify that the potentiometer is soldered properly.
3. Take the main PCB and smear thermal paste on LDMOS Power Amplifier, TO220, and Audio
Power Amplifier.
4. Slide the main board diagonally into the chassis.
5. Tighten all eight screws (Torx T10).
6. Assemble the O-ring on the RF connector and tighten it using Torque 2.4Nm (22 lb.in).
7. Tighten the RF connector security screw M2 (if fitted) using Torque 0.17Nm (1.5 lb.in)
(through the opening in the PCB).
NOTE If replacing old RF connector with new RF connector (new connector supplied with
washer), remove and dispose existing M2 screw on RF-PCB connector.
8. Take the Power Amplifier Clip and insert the leg-shape side into the opening groove located
on the PCB. Tighten the screw using Torque 1.47Nm (13 lb.in).
9. Take the PA Shield and place it on the PA compartment. Tighten the three screws using
Torque 1.47Nm (13 lb.in). Tighten the middle screw first, then the screw located on the left
side, and lastly the screw located on the right side.
10. Insert the DC cable into the slot. Ensure that it is seated correctly on the chassis hook located
below the DC cable. Attach it to the chassis and PCB by tightening the two screws using
Torque 1.47Nm (13 lb.in) (Torx T10).
11. Take the main shield and place it on the chassis. Check that the corners of the main shield
are seated properly on the corner supports.
12. Take the main seal and place it inside the top cover. Verify that the main seal is seated prop-
erly on its placement ribs and all around the groove.
13. Take the upper cover, place it properly on the chassis, and push it down. Three click sounds
are heard from both sides and back.
7.1.2 For Radios without PA Clip
1. Verify that the potentiometer is soldered properly.
2. Take the main PCB and smear thermal paste on TO220, and Audio Power Amplifier.
3. Slide the main board diagonally into the chassis.
4. Tighten all eight screws (Torx T10).
5. Assemble the O-ring on the RF connector and tighten it using Torque 2.4Nm (22 lb.in).
6. Tighten the RF connector security screw M2 (if fitted) using Torque 0.17Nm (1.5 lb.in)
(through the opening in the PCB).
NOTE If replacing old RF connector with new RF connector (new connector supplied with
washer), remove and dispose existing M2 screw on RF-PCB connector.
7. Take the two PA screws and place in screw holes in PA. Tighten the screw using Torque
1.47Nm (13 lb.in).
MAINTENANCE