Motorola PRO9150 기본 서비스 매뉴얼 - 페이지 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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