Motorola PRO9450 Grundlegendes Servicehandbuch - Seite 19
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Disassembling and Reassembling the Radio — General
Be careful not to form solder bridges between the connector pins.
Examine your work closely for shorts due to solder bridges.
Flexible Circuits
The flexible circuits are made from a different material than the rigid boards, and require different
soldering techniques. Excessive prolonged heat on a flexible circuit can damage the material.
Therefore, avoid excessive heat and excessive bending.
For parts replacement, use the ST-1087 Temperature-Controlled Solder Station with a 600-700
degree tip, and use small diameter solder such as ST-633. The smaller size solder will melt faster and
require less heat to be applied to the circuit.
To replace a component on a flexible circuit:
1. Grasp with seizers (hemostats) the edge of the flexible circuit near the part to be removed.
2. Pull gently.
3. Apply the tip of the soldering iron to the component connections while pulling with the seizers.
NOTE Do not attempt to puddle-out components. Prolonged application of heat may
damage the flexible circuit.
3.5
Disassembling and Reassembling the Radio — General
Since these radios may be disassembled and reassembled with the use of only four (board to casting)
screws, 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:
Chassis/front cover disassembly tool
Penknife-size screwdriver
TORX™ T6 screwdriver
If a unit requires more complete testing or service than is customarily performed at the basic level,
send this unit to a Motorola Authorized Service Center. (See Chapter 1 for a list of authorized service
centers.)
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