Motorola Xpr 7000 Seris Basic 68009498001 A Manual

Disassembly/Reassembly Procedures: Introduction 5-1
Chapter 5 Disassembly/Reassembly Procedures
5.1 Introduction
This chapter provides details about the following:
• Preventive maintenance (inspection and cleaning).
• Safe handling of CMOS and LDMOS devices.
• Disassembly and reassembly of the radio.
• Repair procedures and techniques.
5.2 Preventive Maintenance
Periodic visual inspection and cleaning is recommended.
5.2.1 Inspection
Check that the external surfaces of the radio are clean, and that all...

5-2Disassembly/Reassembly Procedures: Safe Handling of CMOS and LDMOS Devices
Cleaning External Plastic Surfaces
Apply the 0.5% detergent-water solution sparingly with a stiff, non-metallic, short-bristled brush to 
work all loose dirt away from the radio. Use a soft, absorbent, lintless cloth or tissue to remove the 
solution and dry the radio. Make sure that no water remains entrapped near the connectors, cracks, 
or crevices.
Cleaning Internal Circuit Boards and Components
Isopropyl alcohol (100%) may...

Disassembly/Reassembly Procedures: Safe Handling of CMOS and LDMOS Devices 5-3
DO NOT attempt to disassemble the radio without first referring to the following CAUTION 
statement.
This radio contains static-sensitive devices. Do not open the radio unless you are 
properly grounded. Take the following precautions when working on this unit:
• Store and transport all CMOS/LDMOS devices in conductive 
material so that all exposed leads are shorted together. Do not insert 
CMOS/LDMOS devices into conventional...

5-4Disassembly/Reassembly Procedures: Repair Procedures and Techniques – General
5.4 Repair Procedures and Techniques – General
Any rework or repair on Environmentally Preferred Products must be done using the appropriate 
lead-free solder wire and lead-free solder paste as stated in the following table:
Parts Replacement and Substitution
When damaged parts are replaced, identical parts should be used. If the identical replacement part 
is not locally available, check the parts list for the proper...

Disassembly/Reassembly Procedures: Disassembling and Reassembling the Radio — General 5-5
5.5 Disassembling and Reassembling the Radio — General
When disassembling and reassembling the radio, it is important to pay particular attention to the 
snaps and tabs, and how parts align with each other.
The following tools are required for disassembling the radio:
• TORX™ T3 and T6 screwdriver
• Chassis and Knob Opener (PMLN6208_)
The following item and tools are required for reassembling the radio:
• Grease...

5-6Disassembly/Reassembly Procedures: Radio Disassembly – Detailed
5.6 Radio Disassembly – Detailed
5.6.1 Front Cover from Chassis Disassembly
1.Turn off the radio.
2.Remove the battery:
a. Release the battery latch by moving it into the unlock position.
b. With the latch released, slide the battery downwards.
c. Remove the battery from the radio.
3.Remove the antenna by turning it counterclockwise.
Figure 5-1.  Antenna and Battery removal.
Antenna 

Disassembly/Reassembly Procedures: Radio Disassembly – Detailed 5-7
4.Remove the channel selector knob and volum knob off from their shafts using the knob 
removal tool. 
Figure 5-2.  Channel Selector and Volume Knob removal.
NOTEBoth knobs slide on and off. However, they are supposed to fit very tightly on their shafts.
Volume Control KnobChannel Selector
Knob 

5-8Disassembly/Reassembly Procedures: Radio Disassembly – Detailed
Figure 5-3.  Shroud removal
5.Hook the knob opener under the shroud as shown in Figure 5-5 and detach it with a 
downward motion.
6.Separate the chassis from the housing assembly as follows:
a. Insert the chassis opener into the recess at the bottom of the radio. Apply a downward 
force to separate the chassis from the front housing.
b. Remove the chassis from the front housing.
Figure 5-4.  Chassis removal
Shroud
Chassis Opener 

Disassembly/Reassembly Procedures: Radio Disassembly – Detailed 5-9
7.Lay the chassis down. Rotate the front cover backward and slightly away from the chassis.
Figure 5-5.  Disconnecting the chassis
8.Lift the latch on the main board to release the keypad from its connector.
9.Remove the flex from the keypad board by pulling it out of its connector gently.
10.Lift the latch on the main board to release the GOB flex from its connector.
Flex
Latch 

5-10Disassembly/Reassembly Procedures: Radio Disassembly – Detailed
5.6.2 Chassis Disassembly
Use a TORX screwdriver with a T6 head to remove the five screws holding the main board to the 
chassis and the three screws holding the GOB.
Figure 5-6.  Chassis disassembly
Main board screws
GOB screws
Chassis
Main board