Table 7-14. Lead Free Solder Wire Part Number List; Table 7-15. Lead Free Solder Paste Part Number List - Motorola EP350 Basic Service Manual

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Service manual (154 pages)

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Table of Contents

7-4

Motorola

Part Number

1088929Y01

95.5Sn/3.8Ag/0.7Cu

Motorola

Manufacturer Part

Part Number

856

74C03

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 Motorola part number.

Orders for replacement parts which are listed in the "Parts List" section of this manual, should be

placed directly on Motorola's local distribution organization or via Motorola Online

Rigid Circuit Boards

This family of radios uses bonded, multi-layer, printed circuit boards. Since the inner layers are not

accessible, some special considerations are required when soldering and unsoldering components.

The printed-through holes may interconnect multiple layers of the printed circuit. Therefore, exercise

care to avoid pulling the plated circuit out of the hole.

When soldering near the connector pins:

•

Avoid accidentally getting solder in the connector.

•

Be careful not to form solder bridges between the connector pins.

•

Examine your work closely for shorts due to solder bridges.

Chip Components

Use the RLN4062 Hot-Air Repair Station for chip component replacement. Adjust the temperature

control to 390 °C (735 °F), and adjust the airflow to a minimum setting. Airflow can vary due to

component density.

•

To remove a chip component:

Use a hot-air hand piece and position the nozzle of the hand piece approximately 0.3 cm

(1/8") above the component to be removed.

Begin applying the hot air. Once thde solder reflows, remove the component using a pair

of tweezers.

Using a solder wick and a soldering iron or a power desoldering station, remove the

excess solder from the pads.

•

To replace a chip component using a soldering iron:

Select the appropriate micro-tipped soldering iron and apply fresh solder to one of the

solder pads.

Using a pair of tweezers, position the new chip component in place while heating the

fresh solder.

Maintenance – EP350 (Limited Keypad Model): Repair Procedures and Techniques – General