Panasonic KX-TG2521RUT / KX-TGA251RUT Service Manual ▷ View online
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KX-TG2521RUT/KX-TGA251RUT
12.2. How to Replace the Shield Case
12.2.1. Preparation
• PbF (: Pb free) Solder
• Soldering Iron
• 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.
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)
12.2.2. 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.
• Be careful about the temperature of the hot air desoldering tool not to damage the PCB and/or IC.
12.2.3. How to Remove the Shield Case
Note:
If you don’t have special tools (ex. Hot air disordering tool), conduct the following operations.
1. Cut the case along perforation.
2. Remove the cut part.
3. Cut the four corners along perforation.
4. Remove the reminds by melting solder.
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KX-TG2521RUT/KX-TGA251RUT
12.2.4. How to Install the Shield Case
Note:
• If you don’t have special tools (ex. Hot air disordering tool), conduct the following operations.
• Shield case’s No. : PNMC1013Z
• Shield case’s No. : PNMC1013Z
1. Put the shield case.
2. Solder the surroundings.
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KX-TG2521RUT/KX-TGA251RUT
12.3. Terminal Guide of the ICs, Transistors, Diodes and Electrolytic
Capacitors
12.3.1. Base Unit
12.3.2. Handset
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KX-TG2521RUT/KX-TGA251RUT
13 Schematic Diagram
13.1. For Schematic Diagram
13.1.1. Base Unit (Schematic Diagram (Base Unit))
Notes:
1. DC voltage measurements are taken with voltmeter from the negative voltage line.
2. The schematic diagrams may be modified at any time with the development of new technology.
13.1.2. Handset (Schematic Diagram (Handset))
Notes:
1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.
2. The schematic diagram may be modified at any time with the development of new technology.
2. The schematic diagram may be modified at any time with the development of new technology.
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