LC-42SB45U
3
Precautions for using lead-free solder
Employing lead-free solder
• “PWBs” of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals.
The alphabetical character following LF shows the type of lead-free solder.
Example
Indicates lead-free solder of tin, silver and copper. Indicates lead-free solder of tin, silver and copper.
■
Using lead-free wire solder
• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause
damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering
bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.
Soldering
• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has
poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land
may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you
confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as
required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
• Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Part No.
★
Description
Code
ZHNDAi123250E J
φ
0.3mm 250g (1roll)
BL
ZHNDAi126500E J
φ
0.6mm 500g (1roll)
BK
ZHNDAi12801KE J
φ
1.0mm 1kg (1roll)
BM
Summary of Contents for AQUOS LC-42SB45U
Page 6: ...LC 42SB45U 6 TV Front view TV Rear view ...
Page 11: ...2008 03 14 LC 42SB45U 11 3 DIMENSIONS ...
Page 50: ...LC 42SB45U 50 3 2 U102 LP2996MRX PSOP 8 3 2 1 Pin Connections and short description ...
Page 54: ...LC 42SB45U 54 3 8 U402 MX25L3205DMI 12G SOP 16 3 8 1 Block Diagram ...
Page 55: ...2008 03 14 LC 42SB45U 55 3 8 2 PIN CONFIGURATION ...
Page 56: ...LC 42SB45U 56 CHAPTER 6 BLOCK DIAGRAM WIRING DIAGRAM 1 MT5382 POWER MAGAGEMENT BLOCK DIAGRAM ...
Page 57: ...2008 03 14 LC 42SB45U 57 2 MAIN BOARD BLOCK DIAGRAM ...
Page 58: ...LC 42SB45U 58 3 WIRING DIAGRAM ...
Page 60: ...60 LC 42SB45U MAIN Unit Side B ...
Page 61: ...LC 42SB45U 1 POWER UNIT PRINTED WIRING BOARD POWER Unit Side A 61 ...
Page 62: ...LC 42SB45U POWER Unit Side B 62 ...
Page 64: ...64 LC 42SB45U IR Unit Side A 3 IR UNIT PRINTED WIRING BOARD IR Unit Side A Cn001 A2 ...