DSX-S300BTX - Sony Car Audio Service Manual (repair manual). Page 3

IMPORTANT  NOTE  OF  “INITIALIZING”
The purpose of “Bluetooth Initialize” is to initialize the Bluetooth 
connection history (HF/Audio Streaming). (To delete the device 
information for the devices that you connected to when searching, 
etc.)
When the BT board or MAIN board (including BT board) are re-
placed, it is necessary to initialize this set.
Refer to the following, initialize this set.

Note: Phonebook data and dialed/received call history can be deleted by 

executing “Reset.”

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.

Under normal conditions, the battery will last approximately 1 year. 
(The service life may be shorter, depending on the conditions of use.)
When the battery becomes weak, the range of the card remote commander 
becomes shorter. Replace the battery with a new CR2025 lithium battery. 
Use of any other battery may present a risk of fire or explosion.

D

Notes on the lithium battery
• Keep the lithium battery out of the reach of children. Should the battery be 

• Wipe the battery with a dry cloth to assure a good contact.
• Be sure to observe the correct polarity when installing the battery.
• Do not hold the battery with metallic tweezers, otherwise a short-circuit 

Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of
in fire.

You can initialize all the Bluetooth-related 
settings from this unit.

Press and hold the multi way encoder.
The menu list appears.

Rotate the multi way encoder to select 
“BT Initialize,” then press it.
The confirmation appears.

Rotate the multi way encoder to select 
“Yes.”
“Initializing...” appears while initializing the 
Bluetooth settings.

The display returns to normal reception/play 
mode.

ABOUT  THE  BT  BOARD  REPLACEMENT
When repairing, the complete BT board should be replaced since 
any parts in the BT board cannot be repaired.

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.

You can cancel the demonstration display which 
appears during turning off.

Press and hold the multi way encoder.
The setup display appears.

Press and hold the multi way encoder.
The setup is complete and the display returns 
to normal reception/play mode.