Mitsubishi Mr.Slim WD-52627, Training Manual

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2-9
Lead Free Solder
Mitsubishi's 2005-2006 product line, including the V28,
V29, V30 and V31 chassis, will be constructed using
lead free solder.
This is the first part of a 3 phase program to eliminate
the lead content in all MDEA's electronic products. The
3 phases are:
• Phase 1… PCB's constructed using Pb-free
solder. PCB surface finishing and components
may contain Pb.
• Phase 2… Solder, PCB surface finishing and
component lead plating is Pb-free. Components
may have internal Pb.
• Phase 3… Solder, PCB surface finishing and
components are Pb-free. (100% Pb-free)
Pb-Free
Phase Definition Display
Short Display (W hen
the area is too small)
Phase-1 PCB's constructed using
Pb-free solder.
Phase-2 Solder, PCB surface
finishing and component
lead plating is Pb-free.
Components may have
internal Pb.
Phase-3 Solder, PCB surface
finishing and
components are Pb-free.
(100% Pb-free)
Table 2-1: Pb-Free Phases and Symbols
Pb PCA
Pb Joints
Pb S
Pb J
Pb P
Pb Solder
Displays used to indicate Pb-free
PCBs will be marked, indicating the level of Pb-free
construction.
Table 2-1 defines the levels by phase and
shows the different symbols that will be displayed on
the PCB. Additionally, a PCB constructed using Pb-
free solder may be simply marked
LFS .
When possible, the indication will be placed close to
the part number that is screened onto the PCB (not the
part label).
Figure 2-1 is an example of a PCB show-
ing the display and its location.
Pb free solder differs from conventional leaded solder.
• The amount of tin in Pb-free solder is greater.
• The melting point of Pb-free solder is higher.
Figure 2-1: Pb-Free Display on PCB
Pb-Free
Display