HT-FS1, SA-FS1, SS-FS1 - Sony Audio Service Manual (repair manual). Page 4

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

• 

Usable with ordinary solder

 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

• JIG
  When disassembling the set, use the following jig (for speaker 

removal).

  Part No.: J-2501-238-A  JIG FOR SPEAKER REMOVAL

NOTE  THE  IC3511  AND  IC3513  ON  THE  HDMI BOARD  
REPLACEMENT
When IC3511 and IC3513 cannot exchange with single. When 
IC3511 and IC3513 are damaged, exchange the entire mounted 
board.