WX-VX55, WX-VX55S - 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.

This label is located on the bottom of the chassis.

You can play CD-DA, CD-R/CD-RW (MP3 fi les) and Video CD.

CD-DA

MP3

Video CD

VCD

Notes on CD-R/CD-RW discs
•  Some CD-Rs/CD-RWs (depending on the equipment used for 

its recording or the condition of the disc) may not play on this 
unit.

•  You cannot play a CD-R/a CD-RW that is not fi nalized.

Notes on Video CDs
A compact disc that contains moving pictures. The picture data 
uses the MPEG 1 format (Video CD), worldwide standards of digi-
tal compression technology.
Video CDs also contain compact audio data. Sounds outside the 
range of human hearing are compressed while the sounds we can 
hear are not compressed.

There are 2 versions of Video CDs.
• Version 

 

You can play only moving pictures and sounds.

 

You can play hi-resolution still pictures and enjoy PBC (Play-
back Control) functions.

This unit conforms to both versions.