How To Replace The Llp; Package - Panasonic KX-TG7341BXM Service Manual

12.4. How to Replace the LLP (Leadless Leadframe Package) IC
12.4.1. Preparation
• PbF (: Pb free) Solder
• Soldering Iron
Tip Temperature of 700°F ± 20°F (370°C ± 10°C)
Note:
We recommend a 30 to 40 Watt soldering iron. An expert may be able to use a 60 to 80 Watt iron where someone with less
experience could overheat and damage the PCB foil.
• Hot Air Desoldering Tool
Temperature: 608°F ± 68°F (320°C ± 20°C)
12.4.2. Caution
• To replace the IC efficiently, choose the right sized nozzle of the hot air desoldering tool that matches the IC package.
• Be careful about the temperature of the hot air desoldering tool not to damage the PCB and/or IC.
12.4.3. How to Remove the IC
1. Heat the IC with a hot air desoldering tool through the P.C.Board.
2. Pick up the IC with tweezers, etc. when the solder is melted completely.
Note:
• Be careful not to touch the peripheral parts with tweezers, etc. They are unstable.
When it is hard to melt the solder completely, heat it with a hot air desoldering tool through the IC besides through the
P.C.Board.
3. After removing the IC, clean the P.C.Board of residual solder.
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KX-TG7341BX/KX-TGA731BX