Motorola MTM800 FuG ET, Basic Service Manual

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6 - 4 Maintenance
General Repair Procedures and Techniques
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
component is not locally available, check the parts list for the proper Motorola part number and
order the component from the nearest Motorola Communications parts center listed in the “Piece
Parts” section of this manual.
Rigid Circuit Boards
The 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 through-plated holes may interconnect multiple layers of the printed circuit.
Therefore, care should be exercised to avoid pulling the plated circuit out of the hole.
When soldering near connector pins:
• avoid accidentally getting solder in the connector
• be careful not to form solder bridges between the connector pins
• closely examine your work for shorts due to solder bridges.
NOTE: Environmentally Preferred Products (EPP) (refer to the marking on the printed circuit
boards – examples shown below) were developed and assembled using environmentally
preferred components and solder assembly techniques to comply with the European
Union’s
Restriction of Hazardous Substances (ROHS) Directive 2002/95/EC and
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC. To
maintain product compliance and reliability, use only the Motorola specified parts in this
manual.
Table 6-1 Lead Free Solder Wire Part Number List
Motorola
Part Number
Alloy Flux Type
Flux Content
by Weight
Melting
Point
Supplier Part
number
Diameter Weight
1088929Y01 95.5Sn/3.8Ag/0.7Cu RMA Version 2.7-3.2% 217°C 52171 0.015” 1lb spool
Table 6-2 Lead Free Solder Paste Part Number List
Motorola Part
Number
Manufacturer Part
Number
Viscosity Type Composition & Percent Metal
Liquid
Temperature
1085674C03 NC-SMQ230 900-1000KCPs
Brookfield (5rpm)
Type 3
(-325/+500)
(95.5%Sn-3.8%Ag-0.7%Cu)
89.3%
217°C