DSX-S200X - Sony Car Audio Service Manual (repair manual). Page 3

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.

NOTE  FOR  THE  24-PIN  CONNECTOR (CN901)
Do not use alcohol to clean the 24-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.

NOTE  FOR  CHECKING  THE  MAIN  BOARD
If removing the MAIN board from the chassis to check it sepa-
rately without attaching the front panel, hold the detach detection 
switch (S702) ON by using tape or the like, and then start opera-
tions.

NOTE  FOR  REPLACEMENT  OF  THE  USB CONNEC-
TOR (CN900)
To replace the USB connector jack requires alignment.
1.  Insert the USB connector into the front panel.
2.  Place the DISPLAY board on the front panel and align the ter-

minals of the USB connector with the holes in the DISPLAY 
board.

3.  Solder the three terminals of the connector.